DIN EN 374-4-2014 Protective gloves against chemicals and micro-organisms - Part 4 Determination of resistance to degradation by chemicals German version EN 374-4 2013《耐化学腐蚀和微生物的防护.pdf

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1、March 2014 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS

2、13.340.40!%,k“2097290www.din.deDDIN EN 374-4Protective gloves against chemicals and micro-organisms Part 4: Determination of resistance to degradation by chemicals;English version EN 374-4:2013,English translation of DIN EN 374-4:2014-03Schutzhandschuhe gegen Chemikalien und Mikroorganismen Teil 4:

3、Bestimmung des Widerstandes gegen Degradation durch Chemikalien;Englische Fassung EN 374-4:2013,Englische bersetzung von DIN EN 374-4:2014-03Gants de protection contre les produits chimiques et les micro-organismes Partie 4: Dtermination de la rsistance la dgradation par des produits chimiques;Versi

4、on anglaise EN 374-4:2013,Traduction anglaise de DIN EN 374-4:2014-03www.beuth.deDocument comprises 1 pagesIn case of doubt, the German-language original shall be considered authoritative.502.14DIN EN 374-4:2014-03 2 A comma is used as the decimal marker. Start of application The start of applicatio

5、n of this standard is 2014-03-01. National foreword This standard includes safety requirements. This document (EN 374-4:2013) has been prepared by Technical Committee CEN/TC 162 “Protective clothing including hand and arm protection and lifejackets” (Secretariat: DIN, Germany). The responsible Germa

6、n body involved in its preparation was the Normenausschuss Persnliche Schutzausrstung (Personal Protective Equipment Standards Committee), Working Committee NA 075-05-08 AA Handschutz. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 374-4 November 2013 ICS 13.340.40 English Version Protective g

7、loves against chemicals and micro-organisms - Part4: Determination of resistance to degradation by chemicals Gants de protection contre les produits chimiques et les micro-organismes - Partie 4: Dtermination de la rsistance la dgradation par des produits chimiques Schutzhandschuhe gegen Chemikalien

8、und Mikroorganismen - Teil 4: Bestimmung des Widerstandes gegen Degradation durch Chemikalien This European Standard was approved by CEN on 28 September 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard th

9、e status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, Fren

10、ch, 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,

11、 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

12、and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref.

13、 No. EN 374-4:2013 EEN 374-4:2013 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Test principles 4 5 Test methods, Puncture resistance test .4 5.1 Sampling .4 5.2 Apparatus .5 5.3 Procedure .5 5.3.1 Test conditions 5 5.3.2 Pre-testing measurements 5 5.

14、3.3 Puncture testing.6 5.3.4 Expression of results 7 6 Test report 7 Annex A (informative) Inter laboratory test on the present test method .9 Annex B (informative) Weight change test 10 B.1 General . 10 B.2 Sampling 10 B.3 Apparatus 10 B.4 Procedure 10 B.4.1 Measurements . 10 B.4.2 Test conditions

15、. 10 B.4.3 Procedure 10 B.4.4 Calculation . 11 B.4.5 Expression of results . 11 B.5 Test report . 11 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 89/686/EEC . 13 DIN EN 374-4:2014-03 EN 374-4:2013 (E) 3 Foreword This document (EN 3

16、74-4:2013) 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 e

17、ndorsement, at the latest by May 2014 and conflicting national standards shall be withdrawn at the latest by May 2014. 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 identifyin

18、g any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the Eu-ropean Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an inte

19、gral part of this document. EN 374 consists of the following parts under the general title, Protective gloves against chemicals and micro-organisms: Part 1: Terminology and performance requirements; Part 2: Determination of resistance to penetration; Part 3: Determination of resistance to permeation

20、 by chemicals; Part 4: Determination of resistance to degradation by chemicals. 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 Republi

21、c, 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. DIN EN

22、374-4:2014-03 EN 374-4:2013 (E) 4 1 Scope This European Standard specifies the test method for the determination of the resistance of protective glove materials to degradation by dangerous chemicals with continuous contact. NOTE Annex A gives information on interlaboratory test results on this metho

23、d. Other tests used to evaluate chemical resistance such as permeation resistance and penetration resistance may not provide sufficient information on the physical property changes affecting a glove during exposure to a chemical. It is necessary that the outside surface of the glove be exposed to th

24、e chemical. 2 Normative references The following 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 (includi

25、ng any amendments) applies. EN 374-1:2003, Protective gloves against chemicals and micro-organisms - Part 1: Terminology and perfor-mance requirements EN 388:2003, Protective gloves against mechanical risks EN 420:2003+A1:2009, Protective gloves - General requirements and test methods 3 Terms and de

26、finitions For the purposes of this document, the terms and definition given in EN 374-1:2003 and EN 420:2003+A1:2009 apply. 4 Test principles The resistance of a protective glove material to degradation by a liquid chemical is determined by measuring the puncture resistance change of the glove mater

27、ial after a continuous contact with the external surface with the challenge test chemical. The test is applicable to gloves made of natural or synthetic polymer. Lined gloves may produce unusable measurement results. 5 Test methods, Puncture resistance test 5.1 Sampling Select three gloves for testi

28、ng. Condition the gloves at (23 2) C, (50 5) % relative humidity for at least 24 hours. In the case of irregular and/or multiple construction, one sample shall be tested from each area. Using the appropriate circular die of 20 mm, cut 6 specimens of each glove for a total of 18 test specimens. For e

29、ach glove, 3 specimens will be exposed to the challenge chemical and 3 specimens will be unexposed. Select specimens so that they are homogeneous and representative of the gloves primary construction. Avoid embossed patterned areas or other areas of varying thickness or composition when cutting thes

30、e specimens. If a glove is constituted of several unbounded layers, only the layer giving the chemical protection shall be tested. The sample shall be tested according to the method described in 5.3. An additional non-mandatory informative test method is given as an example in Annex B. DIN EN 374-4:

31、2014-03 EN 374-4:2013 (E) 5 For lined gloves, if it is not possible to separate the liner from the glove (and if the liner is too thick), the test may not be feasible, because it is not possible to seal the vial and the sample is moving. For certain samples, if there is a thick liner, it may not be

32、necessary to use the septa to have a correct vial sealing. In this case, the liner will ensure the leakproofness. 5.2 Apparatus The following equipment shall be used: a) (20 1) mm diameter cutting die; b) (12 1) mm diameter cutting die (for cutting a hole to the centre of each septum); c) 20 ml crim

33、p top vials (opening (12,5 0,5) mm of diameter); d) 20 mm diameter septa (e.g. made from chlorobutyl rubber without polytetrafluoroethylene (PTFE) layer); e) 20 mm open centre aluminium crimp seals; f) hand crimper; g) hand decapper; h) samples holder with 18 holes of 20 mm diameter; i) 150 ml beake

34、r; j) transfer pipette, 2 ml; k) dynamometer with a puncture stylus according to EN 388:2003, 6.4 and a cell to measure compression forces with a precision of 1 %; l) sample vial support. 5.3 Procedure 5.3.1 Test conditions The test shall be conducted at (23 2) C (preparation, chemical, time exposur

35、e to chemical, puncture test). 5.3.2 Pre-testing measurements Place the challenge chemical into the 150 ml beaker. Using the transfer pipette, place about 2 ml of challenge chemical into one of the crimp top vials. Seat a septum in an open centre aluminium crimp seal cap. Using the (12 1) mm cutting

36、 die, make a centred hole in the septum. Place a glove specimen on top of the septum with its normal external surface facing towards the interior of the vial. Place the aluminium cap with the sample on top of the vial. Seal the vial using the hand crimper and invert it so that the challenge chemical

37、 is in contact with the specimen (see Figure 1). Record the time. Place the vial in the punched-out sample holder. NOTE The punched-out sample holder has a twofold purpose. 1) It allows air to circulate under the sample film, and 2) if the pressure from the challenge chemical forces the sample into

38、a convex shape, the flask will still stand. DIN EN 374-4:2014-03 EN 374-4:2013 (E) 6 Repeat the procedure in the above paragraph for each of the remaining eight specimens that are to be exposed. Time these actions so that the exposures on succeeding specimens begin at three-minute intervals. At the

39、end of the one-hour exposure period (5 min), examine each test vial to confirm coverage of the specimen with the challenge chemical. If the chemical is not covering the specimen, discard the specimen and repeat the test using a larger quantity of challenge chemical. Mount the nine unexposed specimen

40、s in the remaining vials in the same manner, except that no chemical is placed in the vial. Key 1 challenge chemical 2 outer surface of the glove sample which is in contact with the challenge chemical, it is a circular area of (12,5 0,5) mm diameter Figure 1 Position of the vial during contact time

41、between the sample and the dangerous chemical Key 1 20 ml crimp vial 2 puncture stylus 3 sample 4 vial carrier (to be maintain by the dynamometre jaw) Figure 2 Position of the vial during puncture test 5.3.3 Puncture testing Install the puncture stylus on the dynamometer load cell. Set the carriage

42、speed to 100 mm/min and screw the vial support onto the table. Place a vial into the support. Puncture the specimen and record the peak force required (see Figure 2). DIN EN 374-4:2014-03 EN 374-4:2013 (E) 7 Repeat for each of the specimens; test each of the exposed specimens one hour after the expo

43、sure on that specimen was started. Test specimens shall be examined for any changes to their physical properties during and after the test (after drying). Any changes such as swelling, shrinking, brittleness, hardening, softening, flaking, disintegration, colour change/bleeding, delaminating shall b

44、e noted and described on the test report for information. 5.3.4 Expression of results Determine the degradation for each of the three glove specimens against each specific chemical or chemical mixture using the formula: 100(OPx - RPx)DRx X OPx=(1) where DRx is the degradation of the x glove specimen

45、 against challenge chemical tested, in %; OPx is the average puncture force on the three unexposed test specimens from the x glove specimen; units shall be same as RPx; RPx is the average puncture force on the three exposed test specimens from the x glove specimen; units shall be same as OPx . Deter

46、mine the degradation of the sample against the challenge chemical using the following Formula (2): 3321 )DRDR(DRDR+= (2) where DR is the degradation of the test sample against challenge chemical tested, in %; 1DR is the degradation of the first glove specimen against challenge chemical tested, in %;

47、 2DR is the degradation of the second glove specimen against challenge chemical tested, in %; 3DR is the degradation of the third glove specimen against challenge chemical tested, in %. Determine the standard deviation (SD) of the degradation for the three gloves. 6 Test report For each protective g

48、love material tested, a report shall include the following information: a) Report the manufacturers reference for the glove tested including the material, style, and lot number. b) Report the name of the test chemical, its purity, and if it is in a mixture, its concentration and other components. c)

49、 Make reference to this European Standard. d) Report the date of the test. DIN EN 374-4:2014-03 EN 374-4:2013 (E) 8 e) Report DR1, DR2, DR3, DR (see 5.3.4), the percent change in the puncture for the glove material. The SD shall also be reported. f) Report whether the liner, if present, has been separated from the test specimen. g) Report any observations of changes in the physical appearance of the material specimens following chemical exposure. Examples of reported observations are swelling, shrinking, brittleness, hardening