ISO 13362-2000 Flexible cellular polymeric materials - Determination of compression set under humid conditions《软质泡沫聚合材料 在潮湿条件下压缩的测定》.pdf

1、Reference number ISO 13362:2000(E) ISO 2000 INTERNATIONAL STANDARD ISO 13362 First edition 2000-11-01 Flexible cellular polymeric materials Determination of compression set under humid conditions Matriaux polymres alvolaires souples Dtermination de la dformation rmanente aprs compression dans des co

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7、Contents Page Foreword.iv 1 Scope 1 2 Normative reference 1 3 Term and definition .1 4 Principle1 5 Apparatus .2 6 Test pieces .2 7 Conditioning.2 8 Procedure .2 9 Calculation2 10 Precision.3 11 Test report 3ISO 13362:2000(E) iv ISO 2000 All rights reserved Foreword ISO (the International Organizati

8、on 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 been established ha

9、s 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 standardization. Inte

10、rnational 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 least 75 % of the m

11、ember 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 13362 was prepared by Technical

12、 Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 4, Products (other than hoses).INTERNATIONAL STANDARD ISO 13362:2000(E) ISO 2000 All rights reserved 1 Flexible cellular polymeric materials Determination of compression set under humid conditions WARNING Persons using this Internatio

13、nal Standard should be familiar with normal laboratory practice. This standard does not purport to address 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

14、 regulatory conditions. 1 Scope This International Standard specifies a method for determining the compression set of flexible cellular materials under humid conditions. This method consists of maintaining the test piece under specified conditions of time, temperature, humidity and constant compress

15、ive strain and determining the effect on the thickness of the test piece after a specified recovery period. 2 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, su

16、bsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, th

17、e latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 1923:1981, Cellular plastics and rubbers Determination of linear dimensions. 3 Term and definition For the purposes of this International Standard

18、, the following term and definition applies. 3.1 compression set 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, this difference being referred to the

19、initial thickness 4P r i n c i p l e A test piece is maintained for a specified time at a specified temperature and relative humidity under constant deflection and the effect on the thickness of the test piece noted after release.ISO 13362:2000(E) 2 ISO 2000 All rights reserved 5 Apparatus 5.1 Stain

20、less-steel compression device, consisting of two flat plates having dimensions larger than those of the test pieces, with spacers and a clamping mechanism such that the plates are held parallel to each other and the distance between the plates is adjustable to the required compression of the test pi

21、eces. 5.2 Dial gauge, as specified in subclause 3.1 of ISO 1923:1981. 5.3 Air-circulating oven/humidity cabinet, hermetically sealed and capable of maintaining a temperature of (40 1) C and a relative humidity of 95 % to 100 %. 6 Test pieces The test pieces shall be parallelepipeds, with or without

22、skin, with square load-bearing surfaces of side (100 2) mm and with a thickness of (50 1) mm. Three test pieces shall be tested. These shall not be taken close to the edges or ends of the sample. 7 Conditioning Material shall not be tested for at least 72 h after manufacture, unless, at either 16 h

23、or 48 h after manufacture, it can be demonstrated that the compression set values obtained do not differ by more than 10 % from those obtained after 72 h. Testing is permitted at either 16 h or 48 h if, at the selected time, the above criteria have been satisfied. Prior to the test, the test pieces

24、shall be conditioned for at least 16 h in one of the following atmospheres: (23 2) Can d(50 5) % relative humidity; (27 2) Can d(65 5) % relative humidity. NOTE This storage period can form the final part of the period following manufacture. 8 Procedure After conditioning in accordance with clause 7

25、, measure the initial thickness of each test piece to the nearest 0,1 mm as described in subclause 4.3 of ISO 1923:1981. Place a test piece in the compression device and compress it by (70 0,5) % of its original thickness. Within 5 min of compression, place the compressed test piece in the oven/humi

26、dity cabinet at (40 1) C and 95 % to 100 % RH for 2 0 22 h. Remove the compression device from the oven/humidity cabinet and, within 1 min, remove the test piece from the device and place it on a wooden surface. Allow the test piece to recover for 15 min in the same atmosphere as was used for condit

27、ioning and then remeasure the thickness as described above. 9 Calculation Calculate the percentage compression set under humid conditions, CSH, from the following equation: 0r 0 CSH = 100 dd d ISO 13362:2000(E) ISO 2000 All rights reserved 3 where d 0 is the original thickness, in millimetres, of th

28、e test piece; d r is the thickness, in millimetres, of the test piece after recovery. Report the median value of the results obtained. 10 Precision No precision data are available. 11 Test report The test report shall include the following information: a) a reference to this International Standard;

29、b) a description of the material; c) the temperature and humidity at which the test pieces were conditioned; d) the location of the test pieces in the product, and the predominant direction of the cellular structure, if any; e) the location and number of surfaces with skin, if any; f) the median value of the compression set under humid conditions, in percent; g) any deviations from this International Standard; h) the date of the test.ISO 13362:2000(E) ICS 83.100 Price based on 3 pages ISO 2000 All rights reserved