SIST EN 14354:2005
(Main)Wood-based panels - Wood veneer floor covering
Wood-based panels - Wood veneer floor covering
This document specifies definitions, requirements and test methods for wood veneer floor coverings for internal use. It gives guidance for the evaluation of conformity of the products to the requirements of this standard.
Wood-veneer floor coverings without finishing are excluded.
Holzwerkstoffe - Furnierte Fußbodenbeläge
Dieses Dokument legt Definitionen, Anforderungen und Prüfverfahren für furnierte Fußbodenbeläge zur Verwendung im Innenbereich fest. Sie gibt eine Anleitung zur Konformitätsbewertung der Produkte in Bezug auf die Anforderungen dieser Norm.
Furnierte Fußbodenbeläge ohne Oberflächenbehandlung sind ausgeschlossen.
Panneaux a base de bois - Revetement de sol a placage bois
La présente norme européenne spécifie les définitions, les exigences et les méthodes d'essais des revetements de sol a placage bois pour usage intérieur.
Lesne plošče – Leseni furnir za talne obloge
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Holzwerkstoffe - Furnierte FußbodenbelägePanneaux a base de bois - Revetement de sol a placage boisWood-based panels - Wood veneer floor covering97.150Netekstilne talne oblogeNon-textile floor coverings79.080Polizdelki iz lesaSemi-manufactures of timberICS:Ta slovenski standard je istoveten z:EN 14354:2004SIST EN 14354:2005en01-marec-2005SIST EN 14354:2005SLOVENSKI
STANDARD
SIST EN 14354:2005
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14354December 2004ICS 79.080English versionWood-based panels - Wood veneer floor coveringPanneaux à base de bois - Revêtement de sol à placageboisHolzwerkstoffe - Furnierte FußbodenbelägeThis European Standard was approved by CEN on 27 October 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14354:2004: ESIST EN 14354:2005
EN 14354:2004 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.4 4 Requirements.5 5 Classification requirements.7 6 Marking and packaging.8 7 Test report.8 Annex A (normative)
Test methods for the determination of thickness, length, width, squareness, deviation from edge straightness and cup.9 Annex B (normative)
Test method to determine the opening and lipping between elements.15 Annex C (normative)
Test method to determine the elasticity of lacquer.17 Annex D (normative)
Test method to determine the wear resistance.18 Annex E (normative)
Test method to determine the adhesion of the lacquer — Cross cut test.25 Annex F (informative)
Guide for evaluation of conformity of product quality.31 Bibliography.34
SIST EN 14354:2005
EN 14354:2004 (E) 3 Foreword This document (EN 14354:2004) has been prepared by Technical Committee CEN/TC 112 “Wood-based panels”, the secretariat of which is held by DIN. 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 June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard : Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 14354:2005
EN 14354:2004 (E) 4 1 Scope This document specifies definitions, requirements and test methods for wood veneer floor coverings for internal use. It gives guidance for the evaluation of conformity of the products to the requirements of this standard. Wood-veneer floor coverings without finishing are excluded. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 319, Particleboards and fibreboards — Determination of tensile strength perpendicular to the plane of the board. EN 322, Wood based panels — Determination of moisture content. EN 438-2:1991, Decorative high-pressure laminates (HPL) — Sheets based on thermosetting resins —Part 2: Determination of properties (ISO 4586-2:1988 modified). EN 685, Resilient floor coverings — Classification. EN 1534, Wood and parquet flooring — Determination of resistance to indentation (Brinell) — Test method. EN 1910, Wood and parquet flooring and wood panelling and cladding — Determination of dimensional
stability. EN 13329:2000, Laminate floor coverings — Specifications, requirements and test methods. EN 60454–2:1995, Specification for pressure-sensitive adhesive tapes for electrical purposes —Part 2: Methods of test (IEC 60454-2:1994). EN ISO 2409, Paints and varnishes — Cross cut test (ISO 2409:1992). 3 Terms and definitions For the purposes of this document, the following terms and definitions apply: 3.1 wood veneer floor covering rigid floor covering consisting of a substrate made from a wood-based panel, with a top layer of wood veneer and possibly a backing 3.2 top layer
finished upper wood layer, intended to be the visible side when the floor is installed 3.3 substrate core material of the wood veneer floor covering 3.4 backing layer opposite to the top layer SIST EN 14354:2005
EN 14354:2004 (E) 5 3.5 wood veneer floor covering element smallest single item identified as the complete product, shaped and machined on its sides to the appropriate dimensions. The element is provided with a suitable system allowing the elements to be assembled together at installation 3.6 cup curvature, concave or convex, of the element across the width of the face 3.7 lipping difference in height, at the edge, between the upper faces of two adjacent and assembled elements when laid on a flat surface 3.8 deviation from edge straightness concavity or convexity of the edge of the element along the length between the two ends of the element 3.9 wear layer layer on which wearing occur 4 Requirements 4.1 Introduction All wood veneer floor coverings shall comply with the general requirements given in Table 1 and 2 and with the classification requirements given in Table 3. The values given in this Table take account of uncertainties due to variations in the application of finishes and of those described in the test method in
Annex D. 4.2 General requirements The nominal dimensions shall be declared by the manufacturer at a given humidity. For appearance for evaluation of conformity, to be used when requested about product quality, the procedure in Annex F may be used. The wood veneers used for the top layer are hardwood or softwood species and shall be free from decay and insect attack. Variations of colour can occur under the influence of light. SIST EN 14354:2005
EN 14354:2004 (E) 6 Table 1 — General requirements Characteristics Requirements Test methods Moisture content h (dispatch from manufacturer) 5 % ≤ haverage ≤ 9 % and hmax – hmin ≤ 3 % EN 322 Thickness t of an element tmax – tmin ≤ 0,50 mm
taverage -
t nominal ≤ ± 0,50 mm
Length l of the top layer in the same package l ≤ 1 500 mm: lmax – lmin
≤ 0,50 mm l >1 500 mm: lmax – lmin ≤ 0,30 mm/m lmean ≤ 1 mm
Width w of the top layer and square element wmax – wmin
≤ 0,20 mm w average – w nominal
≤ 0,1mm
wmean ≤ 0,5 mm
Length l and width w of squared elements
l = w
laverage – l nominal
≤ 0,10 mm
w average – w nominal
≤ 0,10 mm
lmax – lmin ≤ 0,20 mm w max – w min ≤ 0,20 mm Deviation of squareness qmax ≤ 0,20 mm Deviation from edge straightness of the top layer s smax ≤ 0,30 mm/m Cup fw in width direction fw max ≤ 0,20 %
fw average ≤ 0,15 % Annex A Lipping p pmax ≤ 0,15 mm
Opening between elements ≤ 0,20 mm Annex B Adhesion of the lacquer ≤ class 2
Annex E Tensile strength of the substratea
≥ 1,40 N/mm2 EN 319 Surface soundness ≥ 1,00 N/mm2 Annex D of EN 13329:2000
a For the mechanical assembly systems only (assembly system without glue).
4.3 Requirements on humidity variations To determine the capacity of a wood veneer floor covering to withstand ambient humidity variations, a test in a climate controlled chamber (according to EN 1910 and using the parameters defined in Table 2) shall be made. After testing, the wood veneer floor covering elements shall comply with the requirements in Table 2. SIST EN 14354:2005
EN 14354:2004 (E) 7 Table 2 — General requirements for humidity variations Characteristics Requirement Testing and measuring methods Delamination of the top layer No delamination Visual Cup Mean value: max. 0,35 % of the width w at all stages EN 1910 –
climate B, –
condition n°2, – humid climate H2 – Annex A
5 Classification requirements 5.1 General Veneer floor coverings shall be classified as suitable for different levels of use, according to the performance requirements specified in Table 3, when tested with the methods given therein. Classification shall conform to the scheme specified in EN 685 (levels 21, 22, 23, 31, 32, 33). The use classification defined in the Table 3 had been fixed on the basis of the material (wood veneer) and the linked test methods. 5.2 Classification requirements for elements with lacquer finishing The classification requirements for elements with lacquer finishing are given in Table 3 Table 3 — Classification requirements for elements with finishing ex- factory Class 21 22 23 31 32 33 Symbol
Test method Level of use Domestic Commercial
Moderate General Heavy Moderate General Heavy
Resistance to indentation ≥≥≥≥ 10 N/mm2 ≥≥≥≥ 20 N/mm2 ≥≥≥≥ 30 N/mm2 ≥≥≥≥ 40 N/mm2 EN 1534 Thickness swelling ≤≤≤≤ 15 % ≤≤≤≤ 10 % EN 13329:2000Annex G Impact resistance (Elasticity) EC0 EC1 EC2 EC3 Annex C Wear resistance WR0 WR1 WR2 WR3 Annex D
SIST EN 14354:2005
EN 14354:2004 (E) 8 6 Marking and packaging 6.1 Marking Wood veneer floor coverings which comply with the requirements of this standard shall have the following information marked by the manufacturer, either on their packaging, or on a label or information sheet included in the packaging. a) Product name and number of this document, EN 14354 b) Level of use c) Wood species of the top layer d) Nominal dimensions of one element: thickness × width × length in millimetres e) The number of elements contained in a package f) The area in square metres contained in a package g) Manufacturer’s or supplier’s identification 6.2 Packaging The product shall be delivered in packages designed to protect the corners, edges and surfaces of the product, under normal conditions of transport and handling. Installation, cleaning and maintenance instructions shall be delivered together with the product. 7 Test report If a test report is requested, it shall contain at least the following information: the name and address of the test laboratory; date of test report; a reference to this standard; the product tested; sampling information; test result; all deviations from this standard. SIST EN 14354:2005
EN 14354:2004 (E) 9 Annex A (normative)
Test methods for the determination of thickness, length, width, squareness, deviation from edge straightness and cup A.1 Scope This Annex specifies methods for measuring the thickness, length, width, squareness, deviation from edge straightness and cup of wood veneer floor covering elements. A.2 Sampling Take 5 elements at random. A.3 Conditioning Elements are measured without conditioning. If requested, the test pieces shall be stabilized to a constant mass in an atmosphere of (23 ± 2)°C and (50 ± 5) % relative humidity. Constant mass is considered to be reached when the results of two successive weighing operations, carried out at an interval of 24h, do not differ by more than 0,1 % of the mass of the test pieces. A.4 Test equipment A.4.1 Micrometer, sliding caliper or any other equivalent tool giving an accuracy of 0,05 mm. A.4.2 Sliding caliper or any other equivalent tool giving an accuracy of 0,01 mm. A.4.3 Square arms with lengths of 300 mm and having a maximum angular distortion of 0,02 mm at 300 mm. A.4.4 Steel ruler of length at least equal to the length of test specimen and having a maximum straightness deviation of 0,05 mm over 1 000 mm. A.4.5 Apparatus (T–assembly) for measuring width flatness consisting of a dial gauge accurate to ± 0,01 mm with a rounded tip with a radius of ≤ 5,5 mm, installed centrally in relation to three rounded supports with a radius of ≥ 5 mm. The supports shall be adjustable along a T-shaped assembly of bars to provide the required gauge length. The measurement d shall not be less than the width w of the test specimen minus 10 mm. The tip of the gauge in contact with the face of the test specimen shall apply a force of (1,0 ± 0,5) N. The mass of the apparatus shall not affect the flatness of the test specimen beyond the limit of the accuracy of the gauge.
See Figure A.1 for illustration. The instrument shall be set to zero against a suitable reference plate. SIST EN 14354:2005
EN 14354:2004 (E) 10 Dimensions in millimetres
Key a View A enlarged 1 Dial gauge 2 T-groove 3 Adjustable pin 4 Adjustable bridge Figure A.1 — Instrument for measuring the width flatness (Principle) A.4.6 Steel tape or ruler with an accuracy of ± 0,1 mm up to a length of 1,50 m, and ± 0,5 mm for longer lengths. A.4.7 Thickness gauges ranging from 0,5 mm to 0,10 mm in steps of 0,01, and from 0,10 mm to 0,50 mm in steps of 0,05 mm. A.5 Procedure A.5.1 Determination of thickness t
Measure the thickness t with a micrometer, or any other device of the equipment described in A.4.1, at a distance of 20 mm from the edges of the top layer, at points located in each corner and in the middle of each long side (only four corner points if the length is ≤ 600 mm), see Figure A.2. SIST EN 14354:2005
EN 14354:2004 (E) 11 Dimensions in millimetres
Figure A.2 — Measuring points for determination of thickness t A.5.2 Determination of length l For decorative pattern effects, measure the length of the elements with the test equipment described in A.4.2. For non decorative pattern effects, measure the length of the elements when shorter than 500 mm with the test equipment described in A.4.2 and for lengths equal to or longer than 500 mm, with the test equipment described in A.4.6. Measure the length l of the top layer along two lines parallel to the axis of the element and at a distance of 20 mm from the edges (see Figure A.3). Dimensions in millimetres
Figure A.3 — Measuring for determination of length l A.5.3 Determination of width w and dimensions of squared elements Measure the width w with a micrometer, or any of the other device in A.4.1 along two lines parallel to the sides or edges of the top layer, at a distance of 20 mm from the edges or sides and in the middle for elements with a length of > 600 mm (see Figure A.4). SIST EN 14354:2005
EN 14354:2004 (E) 12 Dimensions in millimetres
Figure A.4 — Measuring points for determination of width w A.5.4 Determination of deviation from squareness q Place one arm of the square (A.4.3) against one long side of the top layer of the element, and determine the maximum deviation to square at the small side. The same procedure is also done on the diagonally opposite corner (see Figure A.5).
Figure A.5 — Determination of squareness q SIST EN 14354:2005
EN 14354:2004 (E) 13 A.5.5 Determination of deviation of edge straightness s Place the steel ruler (A.4.4) against the long sides of the top layer which is concave and determine the maximum deviation (see Figure A.6).
Figure A.6 — Determination of edge straightness s A.5.6 Determination of cup fw
Figure A.7 — Determination of cup fw Adjust the supports along the T-assembly (A.4.5) of the bars according to the width of the element to evaluate (see Figure A.7). The distance between the centres of the supports shall not be less than the width w of the element reduced with 10 mm. Determine the maximum cup for each element. A.6 Calculation and expression of results A.6.1 Thickness t Calculate the mean value from the number of measurements taken. Record the maximum and the minimum individual values. Express the results in millimetres to the nearest 0,1 mm. A.6.2 Width w Calculate the mean value from the number of measurements taken. Record the maximum and the minimum individual values. Express the results in millimetres to the nearest 0,1 mm. SIST EN 14354:2005
EN 14354:2004 (E) 14 A.6.3 Length l Calculate the mean value from the number of measurements taken. Record the maximum and the minimum individual values. Express the results in millimetres to the nearest 0,1 mm. A.6.4 Deviation from squareness q Record all measured values and take as result the largest value of the deviation of the side to the nearest 0,1 mm. A.6.5 Deviation from edge straightness s Record all measured values and take as result the mean value and the largest of the deviation to the ruler. Divide this result by the length and express it to the nearest 0,1 mm/m. A.6.6 Cup fw Record all measured values and take as result the largest convex and concave values and divide each by the width w (see A.6.2). The result is expressed in percent rounded to the nearest 0,01 %. Record convex cup as a (+) value and concave cup as a (–) value. A.7 Test report The test report shall contain the following information: name and the address of the laboratory; name and address of the sponsor, if any, requesting the test; sampling procedure and the identification of the sample; date of delivery; date of the test(s); type and full description of the elements; conditioning applied to the elements prior to testing; climate conditions within the laboratory during the test; reference to the methods and, if any, the deviations; a short description of the test equipment;
test results; date of the test report. SIST EN 14354:2005
EN 14354:2004 (E) 15 Annex B (normative)
Test method to determine the opening and lipping between elements B.1 Scope This Annex specifies methods for measuring lipping and opening between elements. B.2 Sampling Take 8 elements as test pieces, chosen at random. B.3 Conditioning Elements are measured either without conditioning or, if requested, the test pieces shall be stabilised to a constant mass in an atmosphere of (23 ± 2) °C and (50 ± 5) % relative humidity. Constant mass is considered to be reached when the results of two successive weighing operations, carried out at an interval of 24 h, do not differ by more than 0,1 % of the mass of the test pieces. B.4 Test equipment B.4.1 A thickness gauge as described in A.4.7 or a T-assembly as described in A.4.5. B.4.2 A steel ruler or any other device, by which the first strip row shall be aligned and whose length is
≥ 2,50 m B 4.3 A test surface of appropriate size, rigid, horizontal and flat B.5 Procedure B.5.1 Assembling By hand force, firmly assemble the test pieces without using any glue, as in Figure B.1. The -- symbol indicates the 13 measuring points. SIST EN 14354:2005
EN 14354:2004 (E) 16
Key 1 Steel ruler 2 Measuring points 3 Test pieces Figure B.1 — Measuring points to determine the opening and lipping between elements B.5.2 Measuring of lipping Measure the lipping with a thickness gauge or a T-assembly (see B.4), without applying any force to the elements at the 13 indicated points in Figure B.1. The measurement shall not be taken more than 5 mm from the joints’ edge. B.5.3 Measuring of openings Measure the opening with a thickness gauge between the elements at the
13 indicated points in Figure B.1. B.6 Calculation and expression of results Record the maximum individual value of lipping and openings. Express the results in millimetres to the nearest 0,05 mm. B.7 Test report The test report shall contain the following information: name and the address of the laboratory; name and address of the sponsor, if any, requesting the test; e sampling procedure and the identification of the sample; date of delivery; date of the test(s); type and full description of the elements; conditioning applied to the elements prior to testing; climate conditions within the laboratory during the test; reference to the methods and, if any, the deviations; a short description of the test equipment; test results; date of the test report. SIST EN 14354:2005
EN 14354:2004 (E) 17 Annex C (normative)
Test method to determine the elasticity of lacquer C.1 General Test in accordance with EN 438–2:1991, Clause 12 “Impact resistance with large diameter ball”, with the following modifications. C.2 Sampling Take five veneer floor covering elements, chosen at random. Take from each element one test piece measuring approximately 180 mm × 180 mm (or in case of smaller width than 180 mm, w mm × 180 mm).
C.3 Apparatus In addition to the apparatus specified in EN 438–2:1991, Clause 12, a flexible extruded polyethylene foam sub-layer of (3 ± 0,5) mm thickness, and with a density of (25 ± 5) kg/m3 is required. The zoom factor of the magnification glass shall be 10. The indicator fluid is a waterborne solution of 1 % methylene blue. C.4 Procedure On the five small test pieces carry out the large-diameter ball test in accordance with EN 438-2, on the steel plate with the foam but without the clamping frame. Adjust the drop height in steps of 50 mm, to determine the maximum height which does not produce cracks. For the evaluation of the result the magnification glass as well as the indicator fluid shall be used. C.5 Calculation and expression of results
Record the results of each test and calculate the average to the nearest 50 mm. C.6 Evaluation of results, elasticity classification The classification system is based on the results of the large-diameter ball test. Use Table C.1 to determine the appropriate elasticity class (EC0 to EC3). Table C.1 — Elasticity classification Falling height mm ≥ 800 ≥ 1 000 ≥ 1 200 ≥ 1 400 Elasticity classification EC 0 EC1 EC2 EC3
SIST EN 14354:2005
EN 14354:2004 (E) 18 Annex D (normative)
Test method to determine the wear resistance D.1 Scope This Annex specifies a test method to determine the resistance to wear of lacquered wood veneer floor covering. D.2 Test equipment D.2.1 Climate chamber permitting an atmosphere of (23 ± 2) °C and (50 ± 5) % relative humidity to be maintained. D.2.2 Abrading machine (see example in Figure D.1) D.2.2.1 Supporting disc: Disc with a minimum diameter of 105 mm, rotating in the horizontal plane with a permitted deviation of ± 2 mm/m, at (60 ± 2) min–1, the test piece being tightly held flat by means of a suitable clamping device. D.2.2.2 Abrading wheels: Two cylindrical wheels free to turn on their axes, balanced by lever and counterweight, with nominal diameter and width of respectively 44,4 mm and 12,7 mm. They are fitted with a leather strip having a width of (12,7 ± 0,1) mm and a minimum thickness of 1,5 mm. The overall diameter of the wheels, when fitted with leather strips, shall not be less than 47,4 mm. The distance between the internal faces of the wheels shall be (53 ± 2) mm, their common axis being set, by 20 mm nominally, off the axis of the test piece revolving support. The axis of rotation of the test piece shall be equidistant from the two wheels. A device shall apply each grinding wheel onto the test piece with a force. The mass of each device shall be (1 ± 0,01) kg. The devices shall be able to maintain the 20 mm eccentricity for all possible thicknesses of test pieces. D.2.2.3 Revolution counter: Shall be used to record the number of revolutions of the supporting disc. D.2.2.4 Grit feeder: The bottom opening shall be (15 ± 1) mm above the face of the test piece and have a length of (16 ± 1) mm. The length of the bottom opening shall be installed radially to the supporting disc. A device ensuring an immediate stop of the feeding is also required. D.2.2.5 Vacuum cleaning device: Single nozzle (3 ± 2) mm above the track to be worn, installed in the axial vertical plane between the two wheels before the grit feeder (relative to the rotation direction) and which shall provide a differential pressure of (2 ± 0,5) kPa. SIST EN 14354:2005
EN 14354:2004 (E) 19 Dimensions in millimetres
Key 1 Testing weight
6 Nut 11 Direction of rotation 2 Wearing wheel
7 Plate 12 Wearing surface 3 Folding arm
8 Abrasive tank 13 Test piece 4 Counter weight
9 Suction nozzle 14 Storing table 5 Screwed pin 10 Clamping ring NOTE Equipment of this type, Taber Abrader and Taber grit feeder, is made by Teledyne Taber Figure D.1 — Example of an abrading machine with grit feeder SIST EN 14354:2005
EN 14354:2004 (E) 20 D.2.3 Additional equipment D.2.3.1 Weighing equipment with an accuracy of ±±±± 1 g: Intended for the calibration of the weight applied on the test pieces and to calibrate the grit flow. D.2.3.2 Leather strip: The abrading wheels shall be equipped with leather strips with a hardness suitable for the purpose, measured according to EN 1534 with the following deviations: nominal load of (10 ± 0,1) N, instead of 1 kN 4 measurements, instead of 50. The hardness HB of the leather is suitable if all the results are contained within the range (0,06 to 0,10) kg/mm2. NOTE Abrading wheels equipped with suitable leather strips and ready for use are made by Teledyne Taber. D.2.3.3 Abrading plate to calibrate the leather: Plate fitted with a grinding paper with a grain of 240. D.2.3.4 Abrading material: Pure Carborundum grit (di-aluminium tri-oxide) falling through a sieve with 75 µm mesh size and retained on a sieve with 45 µm mesh size. NOTE In order to achieve fully comparable results grit supplied by Treibacher Schleifmittel, Postfach 1, A – 9523 Villach-Landskron Seebach 2, Austria, or equivalent, should be used. D.2.3.5 Stopwatch with an accuracy of ± 0,1 s. D.2.3.6 Tank of known mass to recover the grit when calibrating the grit feeder. D.2.3.7 Calibration plates made of cast acrylic. NOTE This material is available at Teledyne Taber. D.2.4 Equipment to evaluate the wear of the abraded area D.2.4.1 Transparent template (see Figure D.2): each quadrant is divided into four sectors of 22,5°. D.2.4.2 Contrast making solution: water-based solution of 1 % Methylene or Alkali blue
Figure D.2 — Transparent template for visual observation of wearing through SIST EN 14354:2005
EN 14354:2004 (E) 21 D.3 Test procedure D.3.1 Sampling Take one wood veneer flooring element, chosen at random. Take from this element three test specimens measuring approximately 100 mm × 100 mm, two centred 10 mm in from the short edges and one exactly in the centre of the element. D.3.2 Conditioning Unless specified otherwise, the test pieces or the test elements shall be conditioned during one week. Prior to testing, the lacquer shall be fully cured according to the lacquer manufacturer’s instructions. D.3.3 Preparation of the abrading machine D.3.3.1 Installation of the leather strips The leather strips, conditioned to the climate intended for the tests, shall be bonded to the wheels, on their back face, by means of a solvent free glue. The gap between the two ends of the strip shall not exceed 0,5 mm and shall make a bevel about 45° with the edges of the wheel. When the glue is cured, the wheels shall be turned in a lathe to a cylindrical shape and to the dimensions specified in D.2.2. Finally, the wheels shall be abraded for 500 revolutions in the abrader fitted with the abrading plate (see D.2.3.3). NOTE Ready for use wheels complete with leather strips are available at Teledyne Taber. D.3.3.2 Maintenance of the wheels The wheels complete with the leather strips may be used as long as the specifications in D.2.2, regarding the abrading wheels, are complied with. When they no longer comply, the leather strips shall be removed and their replacement shall be carried out as specified in D.3.2.1. D.3.4 Operation of the abrader D.3.4.1 General To start the wear test: prior to filling the abrasive tank, pass the grit for security reasons, e.g. for braking up conglomerates of grit, through a sieve with the mesh size about 250 µm; clamp the test piece on the supporting disc; start rotating the test piece; position the vacuum cleaning nozzle, star
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