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1、BRITISH STANDARD BS EN ISO 1856:2001 Incorporating amendment no. 1 Flexible cellular polymeric materials Determination of compression set The European Standard EN ISO 1856:2000, incorporating amendment A1:2007, has the status of a British Standard ICS 83.100 ? Licensed Copy: London South Bank Univer
2、sity, London South Bank University, Wed Jan 02 02:18:45 GMT+00:00 2008, Uncontrolled Copy, (c) BSI BS EN ISO 1856:2001 This British Standard was published under the authority of the Standards Committee and comes into effect on 15 January 2001 BSI 2007 ISBN 978 0 580 60883 4 National foreword This Br
3、itish Standard is the UK implementation of EN ISO 1856:2000, incorporating amendment A1:2007. It is identical with ISO 1856:2000, incorporating amendment 1:2007. It supersedes BS EN ISO 1856:1996 which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the
4、text by tags !“. Tags indicating changes to ISO text carry the number of the ISO amendment. For example, text altered by ISO amendment 1 is indicated by !“. The UK participation in its preparation was entrusted to Technical Committee PRI/24, Testing of rigid and flexible cellular materials. A list o
5、f organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal
6、obligations. Amendments issued since publication Amd. No. DateComments 1749931 December 2007See national foreword Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:18:45 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NOR
7、M EN ISO 1856 November 2000 ICS 83.100Supersedes EN ISO 1856:1996 English version Flexible cellular polymeric materials - Determination of compression set (ISO 1856:2000) Matriaux polymres alvolaires souples - Dtermination de la dformation rmanente aprs compression (ISO 1856:2000) Weich-elastische p
8、olymere Schaumstoffe - Bestimmung des Druckverformungsrestes (ISO 1856:2000) This European Standard was approved by CEN on 1 November 2000. 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 natio
9、nal standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any o
10、ther language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, G
11、reece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of
12、exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 1856:2000 E +A1 September 2007 Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:18:45 GMT+00:00 2008, Uncontrolled Copy, (c) BSI Foreword The text of the Int
13、ernational Standard ISO 1856:2000 has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products“ in collaboration with Technical Committee CEN/TC 249 “Plastics“, the secretariat of which is held by IBN. This European Standard supersedes EN ISO 1856:1996. This European Standard shall
14、 be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2001, and conflicting national standards shall be withdrawn at the latest by May 2001. According to the CEN/CENELEC Internal Regulations, the national standards organizatio
15、ns of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text
16、 of the International Standard ISO 1856:2000 was approved by CEN as a European Standard without any modification. NOTE: Normative references to International Standards are listed in annex ZA (normative). EN ISO 1856:2000 Foreword to amendment A1 This document (EN ISO 1856:2000/A1:2007) has been prep
17、ared by Technical Committee ISO/TC 45 “Rubber and rubber products“ in collaboration with Technical Committee CEN/TC 249 “Plastics“, the secretariat of which is held by NBN. This Amendment to the European Standard EN ISO 1856:2000 shall be given the status of a national standard, either by publicatio
18、n of an identical text or by endorsement, at the latest by March 2008, and conflicting national standards shall be withdrawn at the latest by March 2008. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Eur
19、opean Standard: Austria, Belgium, Bulgaria, 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 the Unite
20、d Kingdom. Endorsement notice The text of ISO 1856:2007 has been approved by CEN as a EN ISO 1856:2000/A1:2007 without any modification. Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:18:45 GMT+00:00 2008, Uncontrolled Copy, (c) BSI Reference number ISO 1856
21、:2000(E) INTERNATIONAL STANDARD ISO 1856 Third edition 2000-11-01 Flexible cellular polymeric materials Determination of compression set Matriaux polymres alvolaires souples Dtermination de la dformation rmanente aprs compression EN ISO 1856:2000 Licensed Copy: London South Bank University, London S
22、outh Bank University, Wed Jan 02 02:18:45 GMT+00:00 2008, Uncontrolled Copy, (c) BSI ii EN ISO 1856:2000 Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:18:45 GMT+00:00 2008, Uncontrolled Copy, (c) BSI iii ContentsPage 1Scope 1 2Normative reference1 3Term and
23、 definition .1 4Principle1 5Apparatus.2 6Test pieces .2 6.1Requirements.2 6.2Samples showing orientation.2 6.3Number of test pieces .2 6.4Conditioning.2 7 7.1 7.2Method A (compression at 70 C) 3 7.3Method B (compression at standard conditioning temperature) .3 7.4Method C (compression under specific
24、ally specified conditions).3 8Calculation and expression of results.3 9 10Test report4 EN ISO 1856:2000 Procedure.3 General3 Precision.4 Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:18:45 GMT+00:00 2008, Uncontrolled Copy, (c) BSI iv Foreword ISO (the Inte
25、rnational Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has
26、 been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical s
27、tandardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at
28、 least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 1856 was pr
29、epared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 4, Products (other than hoses). This third edition cancels and replaces the second edition (ISO 1856:1980), which has been technically revised. EN ISO 1856:2000 Licensed Copy: London South Bank University, London So
30、uth Bank University, Wed Jan 02 02:18:45 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 1 Flexible cellular polymeric materials Determination of compression set WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard does not purport to address
31、 all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. 1Scope This International Standard specifies three methods for determining the com
32、pression set of flexible cellular materials. At present, this International Standard applies only to latex and polyurethane foams of thickness greater than 2 mm. Methods for other materials will be added as required. 2Normative reference The following normative document contains provisions which, th
33、rough reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, this publication do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of app
34、lying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. 3Term and definition For the purposes of this Inter
35、national Standard, the following term and definition apply. 3.1 compression set the difference between the initial thickness and the final thickness of a test piece of the cellular material after compression for a given time at a given temperature and after a given recovery time, the difference bein
36、g referred to the initial thickness 4Principle A test piece is maintained for a specified time at a specified temperature under constant deflection and the effect on the thickness of the test piece noted after release. EN ISO 1856:2000 !ISO 1923,“ Cellular plastics and rubbers Determination of linea
37、r dimensions. Licensed Copy: London South Bank University, London South Bank University, Wed Jan 02 02:18:45 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 2 5Apparatus 5.1Compression device, consisting of two flat plates having dimensions larger than those of the test pieces, with spacers and clamps su
38、ch that the plates are held parallel to each other and the space between the plates is adjustable to the required deflected height. For testing thin materials, the requisite number of square photographic glass mounting slides shall be provided. The thickness of the slides shall be between 1 mm and 1
39、,5 mm and the length of the side shall be between 50 mm and 55 mm. 5.2Means of measuring the dimensions of test pieces in accordance with ISO 1923. 6Test pieces 6.1Requirements Test pieces shall have parallel top and bottom surfaces and essentially vertical sides. They shall be (50?1) mm long, (50?1
40、) mm wide and (25?1) mm thick. All test pieces shall be free from contamination and skin on the vertical sides. When thin materials are to be tested, sufficient test pieces, of dimensions (50?50) mm, shall be taken so that the sum of their thicknesses before compression is at least 25 mm. The test p
41、ieces shall be plied together and, where the number of plies is greater than two, interleaved with the photographic mounting slides, and the complete assembly shall be treated during the test as a single thick test piece. 6.2Samples showing orientation 6.3Number of test pieces Five 25-mm-thick test
42、pieces, or five assemblies in the case of thin materials, shall be tested. 6.4Conditioning (23?2) C and (50?5) % relative humidity; (27?2) C and (65?5) % relative humidity. EN ISO 1856:2000 !Testing shall be carried out in the direction in which the finished product will be stressed under service co
43、nditions.“ !Materials shall not be tested less than 72 h after manufacture unless it can be demonstrated that the mean results obtained at either 16 h or 48 h after manufacture do not differ by more than 10 % from those obtained after 72 h, in which case testing is permitted at 16 h or 48 h, respect
44、ively. Prior to the test, the test pieces shall be conditioned for at least 16 h in one of the following atmospheres: “ !This conditioning period can form the final part of or, in the case of testing 16 h after manufacture, the whole of the period following manufacture. In the case of quality-contro
45、l tests, test pieces can be taken a shorter time (down to a minimum of 12 h) after manufacture and testing carried out after conditioning for a shorter period (down to a minimum of 6 h) in one of the atmospheres specified above. “ Licensed Copy: London South Bank University, London South Bank Univer
46、sity, Wed Jan 02 02:18:45 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 3 7.2Method A (compression at 70 C) After the test piece has been conditioned as specified in 6.4, measure its initial thickness in accordance with ISO 1923. In the case of thin materials, calculate the thickness of the foam d0by d
47、educting the aggregate thickness of the glass slides from the total thickness of the assembly of glass slides and test pieces measured with the assembly in the horizontal position. Remove the apparatus from the oven and within 1 min remove the test piece from the apparatus and place it on a surface
48、of low thermal conductivity, such as wood. The surface shall be at laboratory temperature. Allow the test Remeasure its thickness dr. In the case of thin materials, take care not to disturb the assembly: calculate the thickness drby deducting the aggregate thickness of the glass slides from the meas
49、ured total thickness of the assembly of glass slides and test pieces. 7.3Method B (compression at standard conditioning temperature) 7.4Method C (compression under specifically specified conditions) Use the procedure specified for method A, using a time, temperature and level of compression agreed between the interested parties. 8Calculation and expression of results 8.1The compression set, expressed as a percentage, is given by the formula: 0r 0 c.s.100 dd d ? ? where d0is the or