BS EN ISO 10066-1998 Flexible cellular polymeric materials - Determination of creep in compression《软质泡沫聚合材料 压缩蠕变的测定》.pdf

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1、BRITISH STANDARD BS EN ISO 10066:1998 Flexible cellular polymeric materials Determination of creep in compression The European Standard EN ISO 10066:1997 has the status of a British Standard ICS 83.100BSEN ISO 10066:1998 This British Standard, having been prepared under the directionof the Sector Bo

2、ard forMaterials and Chemicals, waspublished under the authorityof the Standards Boardand comes into effect on 15January 1998 BSI 04-1999 ISBN 0 580 29434 X National foreword This British Standard is the English language version of EN ISO 10066:1997. It is identical with ISO 10066:1991. The UK parti

3、cipation in its preparation was entrusted to Technical Committee PRI/24, Testing of rigid and flexible cellular materials, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or propos

4、als for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and C

5、ENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section e

6、ntitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Comp

7、liance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN ISO title page, page 2, the ISO title page, page ii, pages 1 and 2, aninside back cover and a back cover. Thi

8、s standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN ISO 10066:1998 BSI 04-1999 i Contents Page National foreword Inside front

9、 cover Foreword 2 Foreword ii Text of EN ISO 10066 1ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10066 November 1997 ICS 83.100 Descriptors: See ISO document English version Flexible cellular polymeric materials Determination of creep in compression (ISO 10066:1991) Matriaux poly

10、mres alvolaires souples Dtermination du fluage en compression (ISO 1006:1991) Weichelastische polymere Schaumstoffe Bestimmung des Kriechens bei Druckbeanspruchung (ISO 10066:1991 ) This European Standard was approved by CEN on 16 October 1997. CEN members are bound to comply with the CEN/CENELEC In

11、ternal Regulations which stipulate the conditions for giving this European Standard the 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 Central Secretariat or to any CEN mem

12、ber. This European Standard exists in three official versions (English, French, 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 Central Secretariat has the same status as the official versions. CEN member

13、s are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisa

14、tion Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10066:1997 EEN ISO 10066:1997 BSI 04-1999 2 Foreword The text of the Internationa

15、l Standard from Technical Committee ISO/TC 61 “Plastics” of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by IBN. This European Standard shall be given the status of

16、a national standard, either by publication of an identical text or by endorsement, at the latest by May 1998, and conflicting national standards shall be withdrawn at the latest by May 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun

17、tries 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 of the International St

18、andard ISO10066:1991 has been approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed in Annex ZA (normative). Contents Page Foreword 2 1 Scope 1 2 Normative reference 1 3 Definitions 1 4 Principle 1 5 Apparatus 1 6 Test piece 1

19、 7 Number of test pieces 1 8 Test conditions 2 9 Procedure 2 10 Expression of results 2 11 Test report 2 Annex ZA (normative) Normative references to international publications with their relevant European publications Inside back coverEN ISO 10066:1997 ii BSI 04-1999 Foreword ISO (the International

20、 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 been est

21、ablished 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 standardiz

22、ation. 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 least75% of the member bodies casting a vote. International Standard ISO 10066 was prepared by Technical Committee

23、 ISO/TC 45, Rubber and rubber products. Descriptors: Rubber, plastics, polymers, flexible cellular materials, tests, creep tests.EN ISO 10066:1997 BSI 04-1999 1 1 Scope This International Standard describes the procedure for determining the creep of a flexible cellular polymeric material when compre

24、ssed by a static force, intended primarily for quality assurance in packaging applications. NOTE 1The test may also be used to obtain design data. For example, a material that shows excessive creep is not likely to be selected for the manufacture of cushions to support packaged items because of the

25、possibility of slippage during storage. The amount of creep and safe static stress that can be allowed depends on cushion thickness, package life and storage conditions. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of t

26、his International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated b

27、elow. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 1923:1981, Cellular plastics and rubbers Determination of linear dimensions. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 percentage creep strain the

28、 change in compressive strain after72h exhibited by a test piece under the specified static stress as determined by measurements15min and72h after applying the stress 3.2 compression stress the static force per unit area of the original cross-section of the test piece 3.3 percentage compression afte

29、r recovery the percentage loss in test piece thickness after72h under static stress followed by a30min recovery period 4 Principle The change in deformation under a static stress with time is measured. 5 Apparatus The apparatus shall consist of two flat, smooth, but not polished, plates, at least on

30、e of which shall be self-aligning, so arranged that they compress the test piece evenly in the vertical direction. The plates shall be capable of being loaded so that during the period of test the static stress does not change by more than 1%, and the separation of the plates shall be capable of bei

31、ng measured to within0,1mm. The compression stress required varies with the material, but is usually less than10kPa. The apparatus shall be placed on a substantial support to minimize the effects of vibration. 6 Test piece 6.1 The test piece shall be a right parallelepiped with the following dimensi

32、ons: length: 50mm 1mm width: 50mm1mm mean thickness: within the range20mm to30mm The thickness of the test piece shall be subject to a tolerance of 1 mm about the selected mean value. The dimensions shall be measured in accordance with ISO 1923. 6.2 The thickness of the test piece may, where necessa

33、ry, be achieved by plying up, without the use of adhesives, two or three sheets each not less than10mm thick, provided that a minimum of 10 cell diameters are included in each ply. Such sheets shall be cut to identical shapes and sizes and shall be of the same orientation with respect to any known d

34、irection of anisotropy. 6.3 The test piece shall be cut by any suitable means that does not alter the compression characteristics, for example a bandsaw or a sharp knife. A hot wire shall not be used for cutting test pieces. 6.4 The presence of skin on the test piece may affect the test result. Wher

35、e a horizontal skin will form an integral pad of the article in use, such a skin shall be included in the test piece and a note included in the test report. Skin shall not be present on a vertical side of the test piece. 7 Number of test pieces Two test pieces per sample shall be tested.EN ISO 10066

36、:1997 2 BSI 04-1999 8 Test conditions 8.1 Material shall not be tested less than72h after manufacture, unless it can be demonstrated that the creep values obtained do not differ by more than 10% from those obtained after72h. Testing is permitted at either16h or48h if, at the selected time, the above

37、 criterion has been satisfied. 8.2 Unless otherwise specified, the test shall be carried out at the standard conditions of: a) 23C 2 C and (50 5)% relative humidity for temperate climates; b) 27C 2 C and (65 5)% relative humidity for tropical climates. 8.3 Prior to test, the test pieces shall be sto

38、red for at least 16 h under the standard conditions given in 8.2. This period of conditioning can form the latter part of the period following manufacture prior to test (see 8.1). 9 Procedure 9.1 Measure the original thickness d 0of the test piece in accordance with 6.1. For tests at temperatures ot

39、her than standard (see 8.2), condition the test piece at the test temperature for a period of at least1h following the measurement of the original thickness d 0 . 9.2 Place the test piece in the apparatus and apply the appropriate compression stress rapidly and smoothly to the test piece in such a m

40、anner as to avoid impact. The magnitude of the applied compression stress shall be as agreed between the purchaser and supplier. The stress chosen shall produce a creep strain of (2,5 0,125)%. NOTE 2The stress applied will usually be between0,5kPa and10kPa. 9.3 Measure the thickness (d 1 ) of the te

41、st piece after15min1min, at the test temperature, without removing the compression stress and repeat the measurement (d 2 ) after72h 0,25 h, at the test temperature, again without removing the compression stress. At the end of the test, remove the compression stress and remeasure the thickness (d R

42、) alter the test piece has been allowed to recover for30min 2min at the standard conditions (see8.2). 10 Expression of results 10.1 The average of the test results from the two test pieces shall be used in the calculation of the result. 10.2 Calculate the percentage creep strain C from the equation

43、where 10.3 Calculate the percentage compression after recovery R cfrom the equation where 11 Test report The test report shall include the following information: a) a reference to this International Standard; b) a description of the material tested; c) the conditioning and test conditions; d) the ma

44、gnitude of the applied compression stress, in kilopascals; e) the percentage creep strain value; f) the percentage compression after recovery; g) the individual results for e) and f); h) whether or not the samples were plied and the location of any skin. d 1 is the thickness, in millimetres, under c

45、ompression stress after15min; d 2 is the thickness, in millimetres, under compression stress after72h. d 0 is the original thickness, in millimetres, of the test piece; d R is the thickness, in millimetres, of the test piece after recovery. C d 1 d 2 d 1 - =100 Rc d 0 d R d 0 - =100 ENISO10066:1997

46、BSI 04-1999 Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the t

47、ext 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 appl

48、ies. Publication Year Title EN Year ISO 1923 1993 Cellular plastics and rubbers Determinationoflineardimensions EN ISO 1923 1995BS EN ISO 10066:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards

49、. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary