1、BRITISH STANDARDBS EN ISO 3386-2:1998Flexible cellular polymeric materials Determination of stress-strain characteristics in compression Part 2: High-density materialsICS 83.100+A1:2010National forewordThis British Standard is the UK implementation of EN ISO 3386-2:1998+A1:2010. It is identical to I
2、SO 3386-2:1997 incorporating amendment 1:2010. It supersedes BS EN ISO 3386-2:1998 which is withdrawn.The start and finish of text introduced or altered by amendment is in-dicated in the text by tags. Tags indicating changes to ISO text carry the number of the ISO amendment. For example, text altere
3、d 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 of organizations represented on this committee can be obtained on request to its secretary.This publication does not pu
4、rport 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 obligations.BS EN ISO 3386-2:1998+A1:2010This British Standard, having been prepared under the directionof the Sector Bo
5、ard forMaterials and Chemicals, was published under the authority of the Standards Boardand comes into effect on 15 June 1998 BSI 2010Amendments/corrigenda issued since publicationDate Comments 30 June 2010 Implementation of ISO amendment 1:2010 with CEN endorsement A1:2010ISBN 978 0 580 62670 8EURO
6、PEAN STANDARDNORME EUROP ENNEEUROPISCHE NORMEN ISO 3386-2:1998+A1AprilICS 83.100Descriptors: See ISO documentEnglish versionFlexible cellular polymeric materials Determination of stress-strain characteristics in compression Part 2: High-density materials(ISO 3386-2:1997/Amd 1:2010)Matriaux polymres
7、alvolaires souples Dtermination de la caractristique de contrainte-dformation relative en compression Partie 2: Matriaux masse volumique leve(ISO 3386-2:1997/Amd 1:2010)Polymere Materialien Bestimmung der Druckspannungs- Verformungseigenschaften Teil 2: Materialien mit hoher Dichte(ISO 3386-2:1997/A
8、md 1:2010)This European Standard was approved by CEN on 9 March 1998.CEN members are bound to comply with the CEN/CENELEC InternalRegulations which stipulate the conditions for giving this European Standardthe status of a national standard without any alteration. Up-to-date lists andbibliographical
9、references concerning such national standards may be obtainedon 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 translation under theresponsibility of a CEN member i
10、nto its own language and notified to theCentral Secretariat has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium,Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland,Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spa
11、in, Sweden,Switzerland and United Kingdom.CENEuropean Committee for StandardizationComit Europen de NormalisationEurop isches Komitee f r NormungCentral Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN nation
12、alMembers.Ref. No. EN ISO 3386-2:1998+A1:2010 E2010 BSI 2010iiForewordThe text of the International Standard from Technical Committee ISO/TC 45 Rubber and rubber products of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical CommitteeCEN
13、/TC 249 Plastics , the secretariat of which is held by IBN.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 1998, and conflicting national standards shall be withdrawn at the latest by Octo
14、ber 1998.According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, No
15、rway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.Endorsement noticeThe text of the International StandardISO 3386-2:1997 has been approved by CEN as a European Standard without any modification.NOTE Normative references to International Standards are listed in Annex ZA (normative).F
16、oreword to amendment A1 BS EN ISO 3386-2:1998+A1:2010EN ISO 3386-2:1998+A1:2010 (E)This document (EN ISO 3386-2:1998/A1:2010) 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 he
17、ld by NBN. 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 2010, and conflicting national standards shall be withdrawn at the latest by October 2010.Attention is drawn to the possibility t
18、hat some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/
19、or CENELEC shall not be held responsible for identifying any or all such patent rights.Endorsement noticeThe text of ISO 3386-2:1997/Amd 1:2010 has been approved by CEN as a EN ISO 3386-2:1998/A1:2010 without any modification.iiiBSI2010ContentsPage1 Scope 12 Normative references 13 Definitions 14 Ap
20、paratus 25 Test piece 26 Procedure 27 Expression of results 38 Repeat tests 39 Test report 3Annex ZA (normative) Normative references to internationalpublications with their relevant European publications 4BS EN ISO 3386-2:1998+A1:2010EN ISO 3386-2:1998+A1:2010 (E)This page deliberately set blank BS
21、I 11 ScopeThis part of ISO 3386 specifies a method for the determination of the compression stress-strain characteristics of flexible cellular polymeric materials of density greater than 250 kg/m3.The compression stress-strain characteristic is a measure of the load-bearing properties of the materia
22、l, though not necessarily of its capacity to sustain a long-term load.The compression stress-strain characteristic differs from the indentation hardness characteristics (as determined in accordance with ISO 2439) which are known to be influenced by the thickness and the tensile properties of the fle
23、xible cellular material under test, the shape of the compression plate, and the shape and size of the test piece.ISO 3386-1 specifies a method for low-density flexible materials, and differs from Part 2 in the following ways: Part 1 is concerned with materials of density up to 250 kg/m3, whilst Part
24、 2 is mainly concerned with materials of density above 250 kg/m3;compression stress values have been deleted from Part 2;Part 2 does not allow the use of a cylindrical test piece.This part of ISO 3386 is a general method for testing denser flexible cellular materials (i.e. expanded cellular rubbers)
25、, measurements being made on one of more points on the steeply rising part of the stress-strain curve. The shape factor of the test piece is important and comparative test results can only be obtained on test pieces having the same shape factor.NOTE 1 For comparison purposes, the method may be used
26、for material of 150 kg/m3density or greater.2 Normative references3 DefinitionsFor the purposes of this International Standard, the following definitions apply.3.1 compression stress-strain characteristic (CC)the stress, expressed in kilopascals, required to produce a compression, at a constant rate
27、 of deformation during the fourth loading cycle of the test specified in this International Standard, expressed as a function of the compressionNOTE 2 Stresses are usually quoted at compressions of (25 1) %, (40 1) %, (50 1) % and (65 1) %, being designated CC25, CC40, CC50 and CC65 respectively.3.2
28、 shape factorthe ratio of the area of one applied force bearing face of the test piece to the sum of the areas of the four perpendicular sides of the test piece1) To be published (Revision of ISO 2439:1980).2010The following referenced documents are indispensable for the application of this document
29、. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1923, Cellular plastics and rubbers Determination of linear dimensionsISO 2439, Flexible cellular polymeric materials Determination of
30、 hardness (indentation technique) ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system!“BS EN ISO 3386-2:1998+A1:2010EN ISO 3386-2:1998+A1:2010 (E)2 BSI 20104 ApparatusT
31、he apparatus comprises a test machine capable of compressing the test piece by means of a compression plate moving at a uniform rate of (5 1) mm/min. Autographic recording of the stress-strain values is preferred.The compression plate shall be maintained parallel to the base plate. The testing machi
32、ne shall have means of measuring the test piece thickness under load to an accuracy of 0,1 mm. It shall be capable of maintaining the specified degree of compression for the period specified by the procedure appropriate to the material under test.The test piece shall be supported on a smooth, flat a
33、nd rigid surface larger than the test piece.The compression plate may be of any convenient size or shape provided that it overlaps the test piece in all directions. The surface of the compression plate shall be smooth but not polished.5 Test piece5.1 DimensionsThe test piece shall be a right paralle
34、lepiped with square load-bearing surfaces of side 40 mm minimum with a shape factor of unity. Therefore the width to thickness ratio shall be 4 : 1.5.2 PreparationThe opposing square faces shall contain the moulded surfaces. The edges of the test piece shall be cleanly cut perpendicular to the mould
35、ed surfaces and shall expose cell structure. Thin sheets may be plied-up to achieve the required thickness, such sheets being cut to identical shapes and sizes, provided that a minimum of 10 cell diameters is included in the thickness of one ply.5.3 Samples showing orientationIf the products show an
36、 orientation of the cellular structure, the direction in which the indentation is to be carried out shall be agreed upon between the interested parties. Normally, testing is carried out in that direction in which the finished product will be stressed under service conditions.5.4 Number of test piece
37、sThree test pieces shall be tested.5.5 Conditioning6 ProcedureMeasure the dimensions of the test piece using the appropriate procedure described in ISO 1923 and calculate the area of the load-bearing face.Insert the test piece in such a way that the force acts along the centre line of the test machi
38、ne and compress it at (5 1) mm/min by means of the compression plate until the compression strain applied equals that specified in the material specification. Then decompress the test piece at the same rate until the separation between the compression plate and the base plate is equal to the initial
39、 test piece thickness.Immediately repeat this procedure three times and on the fourth compression cycle read the force, in newtons, at the specified strain.NOTE 3 If measurements are required at multiple compression strains on a test piece, it is unnecessary to allow recovery time or to repeat the p
40、re-loading procedure between the readings at each strain provided that measurements are taken in order of increasing magnitude of strain.The test machine shall be capable of measuring the force with an accuracy of 2 %, i.e. it shall conform to class 2 (or better) of ISO 7500-1.!“Materials shall not
41、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, respectively.Prior to the test, the tes
42、t pieces shall be con-ditioned, undeflected and undistorted, for at least 16 h in one of the following atmospheres:23 C 2 C, (50 5) % relative humidity; 27 C 2 C, (65 5) % relative humidity. This conditioning period can form the final part of or, in the case of testing 16 h after man-ufacture, the w
43、hole of the period following manufacture. In the case of quality-control 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 spe-cified above.
44、Testing shall be carried out at the same temperature and relative humidity as those used for conditioning.!“BS EN ISO 3386-2:1998+A1:2010EN ISO 3386-2:1998+A1:2010 (E) BSI 37 Expression of resultsThe compression stress-strain characteristic, expressed in kilopascals, at the specified strain, is give
45、n by the formulawhere 8 Repeat testsFor repeat tests on the same test piece, a minimum recovery period of 16 h shall be observed.9 Test reportThe test report shall include the following information: a) reference to this International Standard;b) a description of the material;c) the temperature and h
46、umidity at which the test piece was conditioned;d) the dimensions of the test piece used and (if applicable) the number of plies;e) the compression stress-strain characteristics for individual test pieces and their median,and/or the compression stress-strain values for individual test pieces and the
47、ir median;f) other relevant information.NOTE 4 An example of how to express the compression stress-strain characteristics briefly is as follows ISO 3386-2 CC2523 C/50 % relative humidity(individual results)mdian kPaCCxx is the compression stress-strain characteristic at a strain xx;F is the force, i
48、n newtons, at the specified strain;A is the area, in square millimetres, of the test piece.CCxx1 000FA- - - -=2010BS EN ISO 3386-2:1998+A1:2010EN ISO 3386-2:1998+A1:2010 (E)4 BSI 2010Annex ZA (normative)Normative references to international publications with their relevant European publicationsThis
49、European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.Publication Year Title EN YearISO 1923 1981 Cellular
