SIST EN 14786:2006
(Main)Protective clothing - Determination of resistance to penetration by sprayed liquid chemicals, emulsions and dispersions - Atomizer test
Protective clothing - Determination of resistance to penetration by sprayed liquid chemicals, emulsions and dispersions - Atomizer test
This European Standard specifies a test method to determine the resistance of textile materials against penetration by atomized liquid chemicals, emulsions and dispersions. These materials are intended to be used in both limited-use and reusable protective clothing.
The penetration is expressed in percent, as ratio of the amounts of chemical applied and retained by the textile. The methods of quantitative physico-chemical analysis used for mass detection will depend on the chemical under test.
Schutzkleidung - Bestimmung des Widerstandes gegen Durchdringung von flüssigen gespritzten Chemikalien, Emulsionen und Dispersionen - Spritzverfahren
Diese Europäische Norm legt ein Prüfverfahren für den Durchdringungswiderstand textiler Materialien gegen aufgespritzte flüssige Chemikalien, Emulsionen und Dispersionen fest. Diese Materialien sind sowohl für den Gebrauch von begrenzt einsetzbarer als auch für wieder verwendbarer Schutzkleidung vorgesehen.
Die Penetration wird als Verhältnis der Mengen des aufgebrachten und des sich durch die Textilprobe abtrennenden geprüften chemischen Stoffes in Prozentwerten angegeben. Die Verfahren der quantitativen chemischen bzw. physikalischen für die Feststellung der Massen angewendeten Analyse hängen von der zu prüfenden chemischen Substanz ab.
Vetements de protection - Détermination de la résistance a la pénétration par les produits chimiques liquides pulvérisés, les émulsions et les dispersions - Essai de pulvérisation
La présente Norme européenne spécifie une méthode d'essai de la résistance a la pénétration des matériaux
textiles par des produits chimiques liquides pulvérisés, par des émulsions et des dispersions. Ces matériaux
sont conçus pour etre utilisés a la fois dans des vetements de protection a usage unique ou réutilisables.
La pénétration est exprimée en pourcentage, représentant le rapport entre les quantités de produit chimique
appliquées et arretés par l'échantillon textile. Les méthodes d'analyse physico-chimiques quantitatives servant
a la détection en masse seront fonction du produit chimique soumis a l'essai.
Varovalna obleka - Ugotavljanje odpornosti materialov na prodiranje razpršenih tekočih kemikalij, emulzij in disperzij - Preskus z razprševanjem
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Protective clothing - Determination of resistance to penetration by sprayed liquid chemicals, emulsions and dispersions - Atomizer testVetements de protection - Détermination de la résistance a la pénétration par les produits chimiques liquides pulvérisés, les émulsions et les dispersions - Essai de pulvérisationSchutzkleidung - Bestimmung des Widerstandes gegen Durchdringung von flüssigen gespritzten Chemikalien, Emulsionen und Dispersionen - SpritzverfahrenTa slovenski standard je istoveten z:EN 14786:2006SIST EN 14786:2006en13.340.10ICS:SLOVENSKI
STANDARDSIST EN 14786:200601-julij-2006
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14786April 2006ICS 13.340.10 English VersionProtective clothing - Determination of resistance to penetrationby sprayed liquid chemicals, emulsions and dispersions -Atomizer testVêtements de protection - Détermination de la résistance àla pénétration par les produits chimiques liquidespulvérisés, les émulsions et les dispersions - Essai depulvérisationSchutzkleidung - Bestimmung des Widerstandes gegenDurchdringung von flüssigen gespritzten Chemikalien,Emulsionen und Dispersionen - SpritzverfahrenThis European Standard was approved by CEN on 16 March 2006.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, Romania,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© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14786:2006: E
EN 14786:2006 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 Principle.5 5 Apparatus.6 5.1 Test chamber.6 5.2 Atomizer.8 5.3 Motor driven syringe.11 5.4 Air supply.11 6 Reagents and materials.11 6.1 Absorbent.11 6.2 Solvent for extraction.11 7 Test conditions and procedure.11 7.1 General.11 7.2 Preparatory tests.11 7.2.1 Determination of the amount of liquid contaminating the sample area.11 7.2.2 Determination of the extraction efficiency.12 7.2.3 Blank test.12 7.3 Preparation and conditioning of test specimens.12 7.4 Test procedure.12 8 Calculation of test results.12 9 Test report.13 Annex A (informative)
Example of test.14 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 89/686/EEC.16 Bibliography.17
EN 14786:2006 (E) 3 Foreword This European Standard (EN 14786:2006) has been prepared by Technical Committee CEN/TC 162 “Protective clothing including hand and arm protection and lifejackets”, 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 October 2006, and conflicting national standards shall be withdrawn at the latest by October 2006. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 89/686/EEC. For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this European Standard. 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 14786:2006 (E) 4 Introduction
This European standard specifies a test method to measure a penetration index for protective clothing materials against atomized emulsions and dispersions of liquid chemicals, e.g. pesticides used in agricultural crop spraying. The data may be used as a guide for screening protective clothing materials but the results of the test are affected by the physical properties of the test chemical, e.g. low volatility chemicals. Clothing, which has been developed from materials selected by means of this method of test, should be used only in well-defined circumstances, i.e. when an evaluation of the finished item has indicated an acceptable level of performance (e.g. in laboratory and field testing of a garment, consideration of exposure levels to specified chemicals etc.).
Clothing made of these materials is not for use as the sole means of protection where resistance to permeation by chemicals at the molecular level (to be determined by EN ISO 6529) is essential and where a complete barrier to liquid (or gaseous chemicals) is required (e.g. risk of exposure to massive and forceful discharges of concentrated liquid chemicals). The potential performance levels of materials as assessed by the test method described in this standard are intended to be used in product specifications for protective apparel against atomized liquids, emulsified and dispersed chemicals.
EN 14786:2006 (E) 5
1 Scope This European Standard specifies a test method to determine the resistance of textile materials against penetration by atomized liquid chemicals, emulsions and dispersions. These materials are intended to be used in both limited-use and reusable protective clothing.
The penetration is expressed in percent, as ratio of the amounts of chemical applied and retained by the textile. The methods of quantitative physico-chemical analysis used for mass detection will depend on the chemical under test. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 22768-1, General tolerances - Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1:1998) 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply.
3.1 penetration
process by which a chemical flows through holes or essential openings in the material.
NOTE The holes may be the result of mechanical damage
3.2 permeation
the process by which a chemical moves through a protective clothing material on a molecular level.
NOTE Permeation involves:
sorption of the molecules of the chemical into the contacted (outside) surface of the material;
diffusion of the sorbed molecules in the material, and desorption of the molecules from the opposite (inner) surface of the material. 4 Principle
A test specimen is contaminated by a small quantity of atomized liquid chemical, emulsion or dispersion, injected by a two-phase nozzle operated by a microprocessor controlled step motor. Part of the chemicals will penetrate and wet the test specimen. The flow of chemical passing through the material will be taken up by an absorbent under the test specimen (see Figure 1 for a schematic representation of the test equipment). After 30 min. exposure time the textile and the adsorbent are extracted and analysed in order to determine the amounts of chemical retained and passed through .The extraction efficiency shall be proven and should be larger than 95 %. Depending on the type of chemical different techniques such as e. g. high pressure liquid chromatography (HPLC) or gas chromatography (GC) are used for the quantitative analysis.
The penetration of a protective clothing material is defined as the ratio of the mass of chemical penetrated to the mass of chemical applied.
EN 14786:2006 (E) 6
Key a Detail X: see Figure 6 1 Fastenings 2 Controlled step motor 3 Syringe with test chemical 4 Two-phase nozzle 5 Nozzle holder 6 Covering cylinder 7 Mask 8 Textile specimen 9 Sorbent 10 Ground plate of specimen holder
Figure 1 - Schem
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