Glass in building - Coated glass - Part 5 - Test method and classification for the self-cleaning performances of coated glass surfaces

This European Standard defines a test method to establish the self-cleaning performances for coatings on glass which utilize sun, rain or a combination of sun and rain to enhance the cleanliness of the glass.
The European Standard applies to class A coated glass as defined in EN 1096 1 and EN 1096 2 for use in outdoor building applications. The test is designed to be applicable for coatings on glass which use hydrophilic or photocatalytic active functionalities to enhance the cleanliness of the glass.
The test procedure does not specifically address the durability of the coating's self-cleaning functionality.

Glas im Bauwesen - Beschichtetes Glas - Teil 5: Prüfverfahren und Klasseneinteilung für das Selbstreinigungsverhalten von beschichteten Glasoberflächen

Diese Europäische Norm legt ein Prüfverfahren fest, mit dessen Hilfe das Selbstreinigungsverhalten von Beschichtungen auf Glas nachgewiesen werden kann, die Sonne, Regen oder eine Kombination aus Sonne und Regen nutzen, um die Sauberkeit des Glases zu verbessern.
Die Europäische Norm gilt für beschichtetes Glas der Klasse A nach EN 1096 1 und EN 1096 2 zur Verwendung im Außenbereich von Gebäuden. Die Prüfung wurde zur Anwendung für Beschichtungen auf Glas entwickelt, die hydrophile oder photokatalytisch wirksame Funktionen für die Verbesserung der Sauberkeit des Glases nutzen.
Das Prüfverfahren berücksichtigt nicht im Speziellen die Dauerhaftigkeit der Selbstreinigungsfunktion von Beschichtungen.

Verre dans la construction - Verre à couche - Partie 5: Méthode d'essai et classification des performances autonettoyantes des surfaces de verre à couche

La présente Norme européenne définit une méthode d’essai permettant de déterminer les performances autonettoyantes des couches déposées sur le verre, qui améliorent la propreté du verre à l’aide du soleil, de la pluie ou des deux combinés.
La présente Norme européenne s’applique au verre à couche de classe A tel que défini dans l’EN 1096 1 et l’EN 1096-2, destiné à être utilisé dans les applications de construction extérieures. L’essai a été élaboré de façon à être applicable aux couches déposées sur le verre qui possèdent des propriétés d’activité hydrophile ou photocatalytique pour améliorer la propreté du verre.
Le mode opératoire d’essai ne porte pas spécifiquement sur la durabilité de la fonctionnalité autonettoyante de la couche.

Steklo v gradbeništvu - Steklo z nanosi - 5. del: Metode preskušanja in klasifikacija za samočistilne lastnosti površine stekla z nanosom

Ta evropski standard določa metodo preskušanja za ugotavljanje samočistilnih lastnosti nanosov na steklu, ki s pomočjo sonca, dežja ali kombinacije obojega izboljšajo čistost stekla.
Evropski standard se uporablja za steklo z nanosom razreda A iz standardov EN 1096 1 in EN 1096-2 za uporabo v gradbenih objektih na prostem. Preskus je uporaben za nanose na steklu, ki s hidrofilnimi ali fotokatalitskimi aktivnimi lastnostmi izboljšajo čistost stekla. Preskusni postopek ne obravnava posebej trajnosti samočistilne lastnosti nanosa.

General Information

Status
Withdrawn
Publication Date
29-Apr-2016
Withdrawal Date
30-Jul-2016
Current Stage
9060 - Closure of 2 Year Review Enquiry - Review Enquiry
Start Date
02-Sep-2021
Completion Date
02-Sep-2021

Buy Standard

Standard
EN 1096-5:2016
English language
31 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day
Draft
FprEN 1096-5:2015
English language
33 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Glas im Bauwesen - Beschichtetes Glas - Teil 5: Prüfverfahren und Klasseneinteilung für das Selbstreinigungsverhalten von beschichteten GlasoberflächenVerre dans la construction - Verre à couche - Partie 5: Méthode d'essai et classification des performances autonettoyantes des surfaces de verre à coucheGlass in building - Coated glass - Part 5 - Test method and classification for the self-cleaning performances of coated glass surfaces81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:EN 1096-5:2016SIST EN 1096-5:2016en,fr,de01-junij-2016SIST EN 1096-5:2016SLOVENSKI

STANDARD
SIST EN 1096-5:2016
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1096-5
January
t r s x ICS
z sä r v rä t r English Version
Glass in building æ Coated glass æ Part

w æ Test method and classification for the selfæcleaning performances of coated glass surfaces Verre dans la construction æ Verre à couche æ Partie

wã Méthode d 5essai et classification des performances autonettoyantes des surfaces de verre à couche

Glas im Bauwesen æ Beschichtetes Glas æ Teil

wã Prüfverfahren und Klasseneinteilung für das Selbstreinigungsverhalten von beschichteten Glasoberflächen This European Standard was approved by CEN on

u r November
t r s wä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey andUnited Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels

t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s r { xæ wã t r s x ESIST EN 1096-5:2016

EN 1096-5:2016 (E) 2 Contents Page European foreword ....................................................................................................................................................... 4 1 Scope .................................................................................................................................................................... 5 2 Normative references .................................................................................................................................... 5 3 Terms and definitions ................................................................................................................................... 5 4 Symbols and abbreviations ......................................................................................................................... 6 5 Principle of the test ........................................................................................................................................ 6 6 Instrumentation .............................................................................................................................................. 7 6.1 UVA-Illumination chamber .......................................................................................................................... 7 6.2 Sample support ................................................................................................................................................ 7 6.3 Spraying nozzle ................................................................................................................................................ 8 6.4 Dirt mixture pressure tank .......................................................................................................................... 8 6.5 Water pressure tank ...................................................................................................................................... 8 6.6 Timer for spray ................................................................................................................................................ 8 6.7 Furnace used to dry the glasses ................................................................................................................. 8 7 Preparation of the glass samples............................................................................................................... 9 7.1 General ................................................................................................................................................................ 9 7.2 Tested sample................................................................................................................................................... 9 7.3 Control sample .............................................................................................................................................. 10 8 Haze measurement ...................................................................................................................................... 11 8.1 Unexposed surface cleaning ..................................................................................................................... 11 8.2 Position of haze measurements on the samples ............................................................................... 11 8.3 Measurement of transmission haze ...................................................................................................... 12 9 Preparation of dirt mixture ...................................................................................................................... 12 9.1 General ............................................................................................................................................................. 12 9.2 Stearic acid solution .................................................................................................................................... 12 9.3 Adipic acid solution ..................................................................................................................................... 12 9.4 Solid compound suspension ..................................................................................................................... 13 9.5 Final dirt mixture ......................................................................................................................................... 13 10 Test procedure .............................................................................................................................................. 14 10.1 General ............................................................................................................................................................. 14 10.2 Initial activation ........................................................................................................................................... 14 10.2.1 Glass samples cleaning ............................................................................................................................... 14 10.2.2 UV irradiation ................................................................................................................................................ 14 10.2.3 Initial haze measurement ......................................................................................................................... 14 10.3 First cycle ........................................................................................................................................................ 15 10.3.1 General ............................................................................................................................................................. 15 10.3.2 Dirt mixture spraying ................................................................................................................................. 15 10.3.3 Drying ............................................................................................................................................................... 15 10.3.4 Haze measurement after dirt spray ...................................................................................................... 16 10.3.5 UV-A irradiation ........................................................................................................................................... 16 10.3.6 Haze measurement after UV irradiation ............................................................................................. 16 10.3.7 Deionized water spraying ......................................................................................................................... 16 SIST EN 1096-5:2016

EN 1096-5:2016 (E) 3 10.3.8 Drying ............................................................................................................................................................... 17 10.3.9 Haze measurement after deionized water spray .............................................................................. 17 10.4 Second cycle .................................................................................................................................................... 17 10.5 Collection of the results .............................................................................................................................. 17 11 Classification .................................................................................................................................................. 18 12 Test report ...................................................................................................................................................... 18 Annex A (normative)

Sample support and spray installation ..................................................................... 19 A.1 Spray rig ........................................................................................................................................................... 19 A.2 Spray system ................................................................................................................................................... 20 Annex B (normative)

Haze measurement method .......................................................................................... 22 B.1 General ............................................................................................................................................................. 22 B.2 The instrument .............................................................................................................................................. 22 B.3 Calculation....................................................................................................................................................... 23 B.4 Values ................................................................................................................................................................ 24 B.5 Short cut procedures ................................................................................................................................... 24 Annex C (normative)

Contamination checking procedure ........................................................................... 25 C.1 General ............................................................................................................................................................. 25 C.2 Evaluation of the contamination of the test environment ............................................................. 25 C.3 Irregular contamination of the sample................................................................................................. 25 Annex D (normative)

Statistical analysis of test results – Calculation of statistical numbers to obtain a self-cleaning functionality used for classification of coated glass ........................ 26 Annex E (informative)

Round Robin tests........................................................................................................... 27 E.1 General ............................................................................................................................................................. 27 E.2 Typical results ............................................................................................................................................... 27 E.3 Results interpretation................................................................................................................................. 29 Bibliography ................................................................................................................................................................. 31

SIST EN 1096-5:2016

EN 1096-5:2016 (E) 4 European foreword This document (EN 1096-5:2016) has been prepared by Technical Committee CEN/TC 129 “Glass in building”, the secretariat of which is held by NBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2016, and conflicting national standards shall be withdrawn at the latest by July 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This part of the standard is published to allow the test methodology to be used. As stated in the scope, at the present time, the test procedure does not specifically address the durability of the coating's self-cleaning functionality. Work is on-going to develop applicable testing. EN 1096, Glass in building , is composed of the following parts: — Part

wã Definitions and classification; — Part
xã Requirements and test methods for Aá B and S coatings; — Part

yã Requirements and test methods for C and D coatings; — Product standard; — Part

{ã Test method and classification for the self-cleaning performances of coated glass surfaces. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 1096-5:2016

EN 1096-5:2016 (E) 5 1 Scope This European Standard defines a test method to establish the self-cleaning performances for coatings on glass which utilize sun, rain or a combination of sun and rain to enhance the cleanliness of the glass. The European Standard applies to class A coated glass as defined in EN 1096-1 and EN 1096-2 for use in outdoor building applications. The test is designed to be applicable for coatings on glass which use hydrophilic or photocatalytic active functionalities to enhance the cleanliness of the glass. The test procedure does not specifically address the durability of the coating's self-cleaning functionality. 2 Normative references The following referenced documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1096-1, Glass in building - Coated glass - Part

wã Definitions and classification EN ISO 4892-3:2013, Plastics - Methods of exposure to laboratory light sources - Part

yã Fluorescent UV - yã x v w y) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1096-1 and the following apply. 3.1 glass substrate basic glass, special basic glass, chemically strengthened basic glass, thermally treated basic and special basic glass, laminated glass or laminated safety glass 3.2 coating one or more thin solid layers of inorganic materials applied onto the surface of a glass substrate by various methods of deposition Note 1 to entry: Methods of deposition are described in EN 1096–1. 3.3 glass with dual coating glass substrates to which coatings have been applied on both sides Note 1 to entry: The second coating should not necessarily be a self-cleaning coating. 3.4 coated glass glass substrate to which has been applied a coating, in order to modify one or more of its properties SIST EN 1096-5:2016

EN 1096-5:2016 (E) 6 3.5 self-cleaning coating coating on glass substrates allowing obtaining or maintaining in time a cleaner surface as compared to untreated glass 3.6 hydrophilic coating coating allowing maintaining a water contact angle of less than 20° 3.7 photocatalytic coating coating containing a substance that performs one or more functions based on oxidation and reduction reactions under photo irradiation, inducing decomposition and removal of contaminants 3.8 secondary coating coating deposited on the opposite side of a self-cleaning coating, in case of dual coatings 3.9 haze wide angle scattering of light expressed as the percentage of the total transmitted light which, in passing through the glass, deviates from the incident beam by more than 2,5° 4 Symbols and abbreviations For the purpose of this document, the following symbols and abbreviations apply. RH Relative humidity Sglobal Global standard deviation Tt Total light transmittance Td Diffuse light transmittance H Haze ∆GlobalH Mean global change of haze Hinitial Haze after initial preparation of the sample (cleaning / activation) Hcycle wdirt Haze after cycle 1 dirt application Hcycle wsun Haze after cycle 1 UV exposure Hcycle wrain Haze after cycle 1 water spray Hcycle xdirt Haze after cycle 2 dirt application Hcycle xsun Haze after cycle 2 UV exposure Hcycle xrain = Hfinal Haze after cycle 2 water spray

= Hfinal - Hinitial Haze variation between initial cleaning stage and end of cycle 2 5 Principle of the test Standardized glass samples shall be submitted to a spray of a standardized dirt mixture, followed by a simulation of natural weathering action by applying UV irradiation (to simulate sun) and water spray (to simulate rain). This cycle shall be repeated twice to ensure better stability of results. SIST EN 1096-5:2016

EN 1096-5:2016 (E) 7 The haze shall be measured at initial preparation (after cleaning) and final stage (at the end of the second cycle). The evaluation criteria shall be the haze variation ((Hinitial) and the sample at the final stage of the test (Hfinal), see Formula (1). ∆=−finalinitialHHH

(1) NOTE The incident light on glass samples with dirt deposit is diffused scattered and the effect in transmission is seen as reduction of contrast of objects observed through the glass. It is strongly recommended to measure haze at each step of the test (as explained in Clause 10) in order to check that there is no deviation of the test. The test and all handling of the product to be tested shall be performed in a clean environment, i.e. exempt from any source of contamination (organics, silicones, dust) which could modify the surface, affect the functionality, the test conditions or the haze measurements. An example of contamination checking procedure is given in Annex C. 6 Instrumentation 6.1 UVA-Illumination chamber A UV illumination chamber1) shall be equipped with UVA-340 lamps, such as described in EN ISO 4892-3:2013, Table 1 (“type I” lamps). A closed chamber is recommended. The irradiation power shall be set to 0,68 W·m «2·nm «1 at 340 nm on the surface of the samples, which is the maximal irradiance of solar light according to CIE 85 Table 4. The irradiation level shall be maintained constant and uniformly distributed such as to ensure a same level of irradiation on all the samples. NOTE

The irradiation level can be monitored with a radiometer. The intensity of the lamp can be controlled continuously and adjusted to balance aging of the lamps. Relative Humidity (RH) shall be maintained between 15 % and 50 % inside the chamber during the irradiation period. The air temperature in the illumination chamber shall remain between 25°C and 40°C. The UVA cabinet shall be placed in a well-ventilated area and its vents shall be fully opened, to ensure that the temperature inside the cabinet remains in the indicated values. The temperature and RH shall be monitored and given in the test report. The cabinet shall be clean and exempt of any contamination source, especially silicone source, see Annex C. 6.2 Sample support For the spraying steps, the sample shall be installed on a support, with an inclination of 10° from vertical. The description of the support is given in Annex A.

1) Equipment UV2000 or UVCon from Atlas or QUV from QPannel have been used during the Round Robin tests and found to be suitable. This equipment is an example of a suitable product available commercially. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of this product. SIST EN 1096-5:2016

EN 1096-5:2016 (E) 8 6.3 Spraying nozzle The spraying nozzle2) shall be fixed horizontally and aligned with the centre of the haze measurement area on the glass samples. The distance between the nozzle tip and the glass sample shall be 300 mm, as described in Annex A. The nozzle shall be a full cone airless nozzle with a large spray angle (120°). 6.4 Dirt mixture pressure tank The dirt mixture shall be placed in a dedicated pressure vessel equipped with a mechanical stirrer. The turning velocity of the stirrer shall be adapted to avoid particles precipitation. Pressure vessel and mechanical stirrer shall be made of inert material resistant to acid corrosion and shall not contain any silicone contamination source3). Attention shall be paid to ensure sufficient height of liquid (at least 5 cm) in the container in order to avoid air bubbles in the pulverization system, which could affect final results. The section of container may be lowered by using a narrower container inside the pressure tank to reduce the necessary solution volume. 6.5 Water pressure tank The same precautions against air bubbles as described in 6.4. shall be taken. The water pressure tank may be a simple clean pressurized tank. 6.6 Timer for spray The time of pulverization of the dirt mixture shall be measured in order to control the volume sprayed. It is recommended to use an automatic timer (such as a solenoid valve) to obtain better precision on pulverization time, thus on sprayed volumes. 6.7 Furnace used to dry the glasses The temperature set to dry the glasses shall be (60 ± 2) °C on the glass surface. Before starting the test, furnace shall be calibrated by placing the same amount of glasses that will normally be used for the test inside the furnace. A thermocouple shall be affixed on the glass surface to check the conformity to the target temperature. The duration of the drying stage shall be counted after stabilization of the glass surface temperature. The time for the glass surface to reach the (60 ± 2) °C shall not be included in the drying time.

2) The nozzle SSD-VKL-1-120°-1.4571 from Spraying Systems Germany has been used during the Round Robin tests and found to be suitable. This nozzle is an example of a suitable product available commercially. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of this product.

3) Commercial equipment 83S-211-AT SS pressure tank with direct rotary agitation from ITW-Binks has been used for Round Robin tests and found to be suitable. This pressure tank is an example of a suitable product available commercially. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of this product.

SIST EN 1096-5:2016

EN 1096-5:2016 (E) 9 7 Preparation of the glass samples 7.1 General The test shall be performed on monolithic samples of the products. Dual coating shall be tested according to one of the following options: — an equivalent glass, with only the self-cleaning coating on one side, shall be tested; or — the secondary coating shall be removed by polishing, providing it does not damage the self-cleaning coating on the opposite side; or — the use an of an adapted protection of secondary coating shall be provided (e.g. protective film with electrostatic or low adhesive charge, or laminated glass assembly), in order to protect the secondary coating during the spraying of the dirt mixture . This protective film shall be removed after the spray, and the secondary coating side shall be cleaned before haze measurements. Insulating glass units (IGU) shall not be used. NOTE 1 Assembly in IGU can distort the haze measurements. The test shall be performed on glass with a light transmittance

· 10 %. NOTE 2 For tinted glass and absorbing layers (self-cleaning or dual coatings) the light absorption may affect the precision of haze measurements. 7.2 Tested sample A minimum of 6 samples shall be tested for a given self-cleaning coating. The chosen number of samples shall be indicated as “n”. In case the product to be tested has to be toughened to become active, the test shall be performed on toughened samples. In case the product can be used annealed or toughened, both types shall be tested, with a minimum of 6 annealed samples and 6 toughened samples. The size of the samples shall be 150 mm x 300 mm. The central zone shall be analysed and the sample shall be positioned vertically, as described in Figure 1. The sample shall be engraved with references on the upper left corner of the opposite side from the side to be tested i.e. non coated side. SIST EN 1096-5:2016

EN 1096-5:2016 (E) 10 All dimensions are in mm

Key 1 sample 2 test zone on the sample Figure 1 — Description of test sample 7.3 Control sample A minimum of 6 control samples shall be tested along with the self-cleaning products to be tested. Control samples shall have a behaviour known in advance. A commercial product can be used. The use of clear float glass as control sample should be avoided, due to the sensibility of its surface to its history. Control samples shall fulfil these criteria: — stability of performances and homogeneity; — availability; — low visible absorption; — low initial haze. EXAMPLE Examples of references samples are: — silica sheets; — float glass coated with a given oxide layer, resistant to corrosion (such as silica or photocatalytic coating); — commercially available photocatalytic self-cleaning glass. If control samples do not give the expected results a new test shall be performed, ensuring that all test conditions are respected. SIST EN 1096-5:2016

EN 1096-5:2016 (E) 11 8 Haze measurement 8.1 Unexposed surface cleaning Before each haze measurement the unexposed surface (i.e. the surface opposite to the surface to be tested) shall be cleaned in order not to distort the haze measurement. NOTE 1 Commercial glass cleaner and clean soft paper tissue can be used. No traces from residual cleaner or contamination shall be visible on the unexposed surface. Touching the surface to be measured when cleaning the unexposed surface shall be avoided. If the haze measurements show values clearly outside the average amongst the 9 measured points, the unexposed surface shall be cleaned again. The haze measurement shall be done a second time and the new values shall replace the values of the first measurement. NOTE 2 If there are still peculiar values after the second cleaning, it is most probably due the intrinsic sample characteristics. See also 10.5. 8.2 Position of haze measurements on the samples Haze measurements shall be performed on each sample in 9 positions, identical at each step of the test. To achieve identical positioning for each haze measurement steps, the haze measurement points shall be marked with a felt-tip (or diamond pen) on the opposite side from the tested side of the samples, as described in Figure 2. All dimensions are in mm

Key 1 sample 2 positioning dots 3 haze meter port Figure 2 — Location of the 9 positioning dots and of the hazemeter port in the test zone SIST EN 1096-5:2016

EN 1096-5:2016 (E) 12 8.3 Measurement of transmission haze The total light transmittance, Ttá, and the diffused light transmittance, Td, shall be measured at each of the nine positions defined in 8.2, according to the procedure described in Annex B. The reference of the sample shall always be on the top right corner, when viewed from the coated side. The haze measurements shall be made just above the marked dots, on the side opposite to the surface to be tested in order to avoid contact between the self-cleaning coating and the measurement equipment. The haze value, H, shall be expressed as the ratio of scattered transmittance to total light transmittance, in percent, see Formula (2): =100dtTHT (2) The value of haze for each measurement point shall be registered as Hij where: i is the number of haze measurement point as described in Figure 2 (i = 1 to 9); j is the number of the sample (j =

...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Glas im Bauwesen - Beschichtetes Glas - Teil 5: Prüfverfahren und Klasseneinteilung für das Selbstreinigungsverhalten von beschichteten GlasoberflächenVerre dans la construction - Verre à couche - Partie 5: Méthode d'essai et classification des performances autonettoyantes des surfaces de verre à coucheGlass in building - Coated glass - Part 5 - Test method and classification for the self-cleaning performances of coated glass surfaces81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:FprEN 1096-5kSIST FprEN 1096-5:2015en,fr,de01-september-2015kSIST FprEN 1096-5:2015SLOVENSKI

STANDARD
kSIST FprEN 1096-5:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 1096-5
May 2015 ICS 81.040.20 English Version

Glass in building - Coated glass - Part 5 - Test method and classification for the self-cleaning performances of coated glass surfaces

Verre dans la construction - Verre à couche - Partie 5: Méthode d'essai et classification des performances autonettoyantes des surfaces de verre à couche

Glas im Bauwesen - Beschichtetes Glas - Teil 5: Prüfverfahren und Klasseneinteilung für das Selbstreinigungsverhalten von beschichteten Glasoberflächen This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee CEN/TC 129.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 1096-5:2015 EkSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 2 Contents Page Foreword ..............................................................................................................................................................4 1 Scope ......................................................................................................................................................5 2 Normative references ............................................................................................................................5 3 Terms and definitions ...........................................................................................................................5 4 Symbols and abbreviations ..................................................................................................................6 5 Principle of the test................................................................................................................................6 6 Instrumentation ......................................................................................................................................7 6.1 UVA-Illumination chamber ....................................................................................................................7 6.2 Sample support ......................................................................................................................................7 6.3 Spraying nozzle ......................................................................................................................................7 6.4 Dirt mixture pressure tank ....................................................................................................................8 6.5 Water pressure tank ..............................................................................................................................8 6.6 Timer for spray .......................................................................................................................................8 6.7 Furnace used to dry the glasses ..........................................................................................................8 7 Preparation of the glass samples ........................................................................................................8 7.1 General ....................................................................................................................................................8 7.2 Tested sample ........................................................................................................................................9 7.3 Control sample .................................................................................................................................... 10 8 Haze measurement ............................................................................................................................. 10 8.1 Unexposed surface cleaning ............................................................................................................. 10 8.2 Position of haze measurements on the samples ............................................................................ 10 8.3 Measurement of transmission haze .................................................................................................. 11 9 Preparation of dirt mixture ................................................................................................................. 12 9.1 General ................................................................................................................................................. 12 9.2 Stearic acid solution ........................................................................................................................... 12 9.3 Adipic acid solution ............................................................................................................................ 12 9.4 Solid compound suspension ............................................................................................................. 12 9.5 Final dirt mixture ................................................................................................................................. 13 10 Test procedure .................................................................................................................................... 13 10.1 General ................................................................................................................................................. 13 10.2 Initial activation ................................................................................................................................... 14 10.2.1 Glass samples cleaning ..................................................................................................................... 14 10.2.2 UV irradiation ...................................................................................................................................... 14 10.2.3 Initial haze measurement ................................................................................................................... 14 10.3 First cycle ............................................................................................................................................ 15 10.3.1 General ................................................................................................................................................. 15 10.3.2 Dirt mixture spraying .......................................................................................................................... 15 10.3.3 Drying ................................................................................................................................................... 15 10.3.4 Haze measurement after dirt spray ................................................................................................... 16 10.3.5 UV-A irradiation ................................................................................................................................... 16 10.3.6 Haze measurement after UV irradiation............................................................................................ 16 10.3.7 Deionized water spraying .................................................................................................................. 16 10.3.8 Drying ................................................................................................................................................... 17 10.3.9 Haze measurement after deionized water spray ............................................................................. 17 10.4 Second cycle ....................................................................................................................................... 17 kSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 3 10.5 Collection of the results ...................................................................................................................... 17 11 Classification ....................................................................................................................................... 18 12 Test report ............................................................................................................................................ 18 Annex A (normative)

Sample support and spray installation ...................................................................... 20 A.1 Spray rig ............................................................................................................................................... 20 A.2 Spray system ....................................................................................................................................... 21 Annex B (normative)

Haze measurement method ......................................................................................... 23 B.1 General ................................................................................................................................................. 23 B.2 The instrument ..................................................................................................................................... 23 B.3 Calculation ........................................................................................................................................... 24 B.4 Values ................................................................................................................................................... 25 B.5 Short cut procedures .......................................................................................................................... 25 Annex C (normative)

Contamination checking procedure ........................................................................... 26 C.1 General ................................................................................................................................................. 26 C.2 Evaluation of the contamination of the test environment ............................................................... 26 C.3 Irregular contamination of the sample .............................................................................................. 26 Annex D (normative)

Statistical analysis of test results – Calculation of statistical numbers to obtain a self-cleaning functionality used for classification of coated glass ................................. 27 Annex E (informative)

Round Robin tests ...................................................................................................... 29 E.1 General ................................................................................................................................................. 29 E.2 Typical results ..................................................................................................................................... 29 E.3 Results interpretation ......................................................................................................................... 31 Bibliography ...................................................................................................................................................... 33

kSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 4 Foreword This document (FprEN 1096-5:2015) has been prepared by Technical Committee CEN/TC 129 “Glass in building”, the secretariat of which is held by NBN. This document is currently submitted to the Unique Acceptance Procedure. This part of the standard is published to allow the test methodology to be used. As stated in the scope, at the present time, the test procedure does not specifically address the durability of the coating's self-cleaning functionality. Work is on-going to develop applicable testing. EN 1096, Glass in building

Coated glass, is composed of the following parts: — Part 1: Definitions and classification — Part 2: Requirements and test methods for A, B and S coatings — Part 3: Requirements and test methods for C and D coatings — Part 4: Evaluation of conformity/Product standard — Part 5: Test method and classification for the self-cleaning performances of coated glass surfaces kSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 5 1 Scope This European Standard defines a test method to establish the self-cleaning performances for coatings on glass which utilize sun, rain or a combination of sun and rain to enhance the cleanliness of the glass. The European Standard applies to class A coated glass as defined in EN 1096-1 and EN 1096-2 for use in outdoor building applications. The test is designed to be applicable for coatings on glass which use hydrophilic or photocatalytic active functionalities to enhance the cleanliness of the glass. The test procedure does not specifically address the durability of the coating's self-cleaning functionality. 2 Normative references The following referenced documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1096-1, Glass in building — Coated glass — Part 1: Definitions and classification EN ISO 4892-3:2013, Plastics — Methods of exposure to laboratory light sources — Part 3: Fluorescent UV lamps (ISO 4892-3:2013) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1096-1 and the following. 3.1 glass substrate basic glass, special basic glass, chemically strengthened basic glass, thermally treated basic and special basic glass, laminated glass or laminated safety glass 3.2 coating one or more thin solid layers of inorganic materials applied onto the surface of a glass substrate by various methods of deposition Note 1 to entry: Methods of deposition are described in EN 1096–1. 3.3 dual coating glass substrates to which coatings have been applied on both sides Note 1 to entry: The second coating should not necessarily be a self-cleaning coating. 3.4 coated glass glass substrate to which has been applied a coating, in order to modify one or more of its properties 3.5 self-cleaning coating coating on glass substrates allowing obtaining or maintaining in time a cleaner surface as compared to untreated glass kSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 6 3.6 hydrophilic coating coating allowing maintaining a water contact angle of less than 20° 3.7 photocatalytic coating coating containing a substance that performs one or more functions based on oxidation and reduction reactions under photo irradiation, inducing decomposition and removal of contaminants 3.8 secondary coating coating deposited on the opposite side of a self-cleaning coating, in case of dual coatings 3.9 haze wide angle scattering of light expressed as the percentage of the total transmitted light which, in passing through the glass, deviates from the incident beam by more than 2,5° 4 Symbols and abbreviations For the purpose of this document, the following symbols and abbreviations apply. RH Relative humidity Sglobal Global standard deviation Tt Total light transmittance Td Diffuse light transmittance H Haze GlobalH∆ Global mean haze Hinitial Haze after initial preparation of the sample (cleaning / activation) Hcycle1dirt Haze after cycle 1 dirt application Hcycle1sun Haze after cycle 1 UV exposure Hcycle1rain Haze after cycle 1 water spray Hcycle2dirt Haze after cycle 2 dirt application Hcycle2sun Haze after cycle 2 UV exposure Hcycle2rain = Hfinal Haze after cycle 2 water spray ûH = Hfinal - Hinitial Haze variation between initial cleaning stage and end of cycle 2 5 Principle of the test Standardized glass samples shall be submitted to a spray of a standardized dirt mixture, followed by a simulation of natural weathering action by applying UV irradiation (to simulate sun) and water spray (to simulate rain). This cycle shall be repeated twice to ensure better stability of results. The haze shall be measured at initial preparation (after cleaning) and final stage (at the end of the second cycle). The evaluation criteria shall be the haze variation (ûe) between the sample after initial preparation (einitial) and the sample at the final stage of the test (Hfinal), see Formula 1. kSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 7 finalinitialHHH∆=−

(1) NOTE The incident light on glass samples with dirt deposit is diffused scattered and the effect in transmission is seen as reduction of contrast of objects observed through the glass. It is strongly recommended to measure haze at each step of the test (as explained in Clause 10) in order to check that there is no deviation of the test. The test and all handling of the product to be tested shall be performed in a clean environment, i.e. exempt from any source of contamination (organics, silicones, dust) which could modify the surface, affect the functionality, the test conditions or the haze measurements. An example of contamination checking procedure is given in Annex C. 6 Instrumentation 6.1 UVA-Illumination chamber A UV illumination chamber shall be equipped with UVA-340 lamps, such as described in EN ISO 4892-3:2013, Table 1 (“type I” lamps). A closed chamber is recommended. The irradiation power shall be set to 0,68 W·m−2·nm−1 at 340 nm on the surface of the samples, which is the maximal irradiance of solar light according to CIE 85 Table 4. The irradiation level shall be maintained constant and uniformly distributed such as to ensure a same level of irradiation on all the samples. NOTE

The irradiation level can be monitored with a radiometer. The intensity of the lamp can be controlled continuously and adjusted to balance aging of the lamps. Relative Humidity (RH) shall be maintained between 15 % and 50 % inside the chamber during the irradiation period. The air temperature in the illumination chamber shall remain between 25°C and 40°C. The UVA cabinet shall be placed in a well-ventilated area and its vents shall be fully opened, to ensure that the temperature inside the cabinet remains in the indicated values. The temperature and RH shall be monitored and given in the test report.1) The cabinet shall be clean and exempt of any contamination source, especially silicone source, see Annex C. 6.2 Sample support For the spraying steps, the sample shall be installed on a support, with an inclination of 10° from vertical. The description of the support is given in Annex A. 6.3 Spraying nozzle The spraying nozzle2) shall be fixed horizontally and aligned with the centre of the haze measurement area on the glass samples. The distance between the nozzle tip and the glass sample shall be 300 mm, as described in Annex A. The nozzle shall be a full cone airless nozzle with a large spray angle (120°).

1) Equipment UV2000 or UVCon from Atlas or QUV from QPannel have been used during the Round Robin tests and found to be suitable. This equipment is an example of a suitable product available commercially. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of this product. 2) The nozzle SSD-VKL-1-120°-1.4571 from Spraying Systems Germany has been used during the Round Robin tests and found to be suitable. This nozzle is an example of a suitable product available commercially. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of this product.

kSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 8 6.4 Dirt mixture pressure tank The dirt mixture shall be placed in a dedicated pressure vessel equipped with a mechanical stirrer. The turning velocity of the stirrer shall be adapted to avoid particles precipitation. Pressure vessel and mechanical stirrer shall be made of inert material resistant to acid corrosion and shall not contain any silicone contamination source3). Attention shall be paid to ensure sufficient height of liquid (at least 5 cm) in the container in order to avoid air bubbles in the pulverization system, which could affect final results. The section of container may be lowered by using a narrower container inside the pressure tank to reduce the necessary solution volume. 6.5 Water pressure tank The same precautions against air bubbles as described in 6.4. shall be taken. The water pressure tank may be a simple clean pressurized tank. 6.6 Timer for spray The time of pulverization of the dirt mixture shall be measured in order to control the volume sprayed. It is recommended to use an automatic timer (such as a solenoid valve) to obtain better precision on pulverization time, thus on sprayed volumes. 6.7 Furnace used to dry the glasses The temperature set to dry the glasses shall be (60 ± 2) °C on the glass surface. Before starting the test, furnace shall be calibrated by placing the same amount of glasses that will normally be used for the test inside the furnace. A thermocouple shall be affixed on the glass surface to check the conformity to the target temperature. The duration of the drying stage shall be counted after stabilization of the glass surface temperature. The time for the glass surface to reach the (60 ± 2) °C shall not be included in the drying time. 7 Preparation of the glass samples 7.1 General The test shall be performed on monolithic samples of the products. Dual coating shall be tested according to one of the following options: — an equivalent glass, with only the self-cleaning coating on one side, shall be tested, or — the secondary coating shall be removed by polishing, providing it does not damage the self-cleaning coating on the opposite side, or — the use an of an adapted protection of secondary coating shall be provided (e.g. protective film with electrostatic or low adhesive charge, or laminated glass assembly), in order to protect the secondary

3) Commercial equipment 83S-211-AT SS pressure tank with direct rotary agitation from ITW-Binks has been used for Round Robin tests and found to be suitable. This pressure tank is an example of a suitable product available commercially. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of this product.

kSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 9 coating during the spraying of the dirty mixture . This protective film shall be removed after the spray, and the secondary coating side shall be cleaned before haze measurements. Insulating glass units (IGU) shall not be used. NOTE 1 Assembly in IGU can distort the haze measurements. The test shall be performed on glass with a light transmittance ≥ 10 %. NOTE 2 For tinted glass and absorbing layers (self-cleaning or dual coatings) the light absorption may affect the precision of haze measurements. 7.2 Tested sample A minimum of 6 samples shall be tested for a given self-cleaning coating. The chosen number of samples shall be indicated as “n”. In case the product to be tested has to be toughened to become active, the test shall be performed on toughened samples. In case the product can be used annealed or toughened, both types shall be tested, with a minimum of 6 annealed samples and 6 toughened samples. The size of the samples shall be 150 mm x 300 mm. The central zone shall be analysed and the sample shall be positioned vertically, as described in Figure 1. The sample shall be engraved with references on the upper left corner of the opposite side from the side to be tested i.e. non coated side. All dimensions are in mm

Key 1 sample 2 test zone on the sample Figure 1 — Description of test sample kSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 10 7.3 Control sample A minimum of 6 control samples shall be tested along with the self-cleaning products to be tested. Control samples shall have a behaviour known in advance. A commercial product can be used. The use of clear float glass as control sample should be avoided, due to the sensibility of its surface to its history. Control samples shall fulfil these criteria: — stability of performances and homogeneity; — availability; — low visible absorption; — low initial haze. EXAMPLE Examples of references samples are: — silica sheets; — float glass coated with a given oxide layer, resistant to corrosion (such as silica or photocatalytic coating); — commercially available photocatalytic self-cleaning glass. If control samples do not give the expected results a new test shall be performed, ensuring that all test conditions are respected. 8 Haze measurement 8.1 Unexposed surface cleaning Before each haze measurement the unexposed surface (i.e. the surface opposite to the surface to be tested) shall be cleaned in order not to distort the haze measurement. NOTE 1 Commercial glass cleaner and clean soft paper tissue can be used. No traces from residual cleaner or contamination shall be visible on the unexposed surface. Touching the surface to be measured when cleaning the unexposed surface shall be avoided. If the haze measurements show values clearly outside the average amongst the 9 measured points, the unexposed surface shall be cleaned again. The haze measurement shall be done a second time and the new values shall replace the values of the first measurement. NOTE 2 If there are still peculiar values after the second cleaning, it is most probably due the intrinsic sample characteristics. See also 10.5. 8.2 Position of haze measurements on the samples Haze measurements shall be performed on each sample in 9 positions, identical at each step of the test. To achieve identical positioning for each haze measurement steps, the haze measurement points shall be marked with a felt-tip (or diamond pen) on the opposite side from the tested side of the samples, as described in Figure 2. kSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 11 All dimensions are in mm

Key 1 sample 2 positioning dots 3 haze meter port Figure 2 — Location of the 9 positioning dots and of the hazemeter port in the test zone 8.3 Measurement of transmission haze The total light transmittance, Tt,, and the diffused light transmittance, Td, shall be measured at each of the nine positions defined in 8.2, according to the procedure described in Annex B. The reference of the sample shall always be on the top right corner, when viewed from the coated side. The haze measurements shall be made just above the marked dots, on the side opposite to the surface to be tested in order to avoid contact between the self-cleaning coating and the measurement equipment. The haze value, H, shall be expressed as the ratio of scattered transmittance to total light transmittance, in percent, see Formula 2: 100dtTHT= (2) The value of haze for each measurement point shall be registered as Hij kSIST FprEN 1096-5:2015

FprEN 1096-5:2015 (E) 12 where: i is the number of haze measurement point as described in Figure 2 (i = 1 to 9); j is the number of the sample (j = 1 to n). NOTE The initial haze of coated glass samples may vary depending on the product, but typically uncoated clear float glass after cleaning has an initial haze below 0,3 %. 9 Preparation of dirt mixture 9.1 General The tolerance on the masses of all organic and inorganic compounds shall be1 %. 9.2 Stearic acid solution In a wide-necked bottle with a plastic cork equipped with a magnetic stirrer, 2,5 g of stearic acid (CAS N° 57-11-4, purity > 90 %) shall be dissolved in 500 ml of absolute ethanol. The solution shall be stirred until complete dissolution of the acid is achieved. NOTE This may take 10 min to 45 min at standard laboratory temperature (i.e. temperature between 20°C and 23°C). 9.3 Adipic acid solution The following products shall be put in a wide

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.