1、BRITISH STANDARD BS EN ISO 11501:2004 Incorporating Amendment No. 1 to BS 2782-6: M e t h o d 6 4 3 B : 1 9 9 6 (renumbers the BS as BS EN ISO 11501:2004) Plastics Film and sheeting Determination of dimensional change on heating IMPORTANT NOTICE. Before reading this method it is essential to read BS
2、 2782-0, Introduction, issued separately. The European Standard EN ISO 11501:2004 has the status of a British Standard ICS 83.140.10 BS EN ISO 11501:2004 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority
3、 of the Standards Board and comes into effect on 15 May 1996 BSI 21 September 2004 The following BSI references relate to the work on this standard: Committee reference PRI/75 Draft for comment 93/307629 DC ISBN 0 580 25581 6 Committees responsible for this British Standard This preparation of this
4、Part of BS 2782 was entrusted to Technical Committee PRI/75, Plastics and rubber film and sheets, upon which the following bodies were represented: British Plastics Federation Her Majestys Stationery Office Institute of Trading Standards Administration Ministry of Defence Packaging and Industrial Fi
5、lms Association PIRA International Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, pages 1 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication
6、 Amd. No. Date Comments 15283 21 September 2004 Implementation of the European StandardBS EN ISO 11501:2004 BSI 21 September 2004 i Contents Page Committees responsible Inside front cover National foreword ii 1S c o p e 3 2 Normative reference 3 3 Principle 3 4A p p a r a t u s 3 5 Test specimens 3
7、6 Procedure 3 7 Expression of results 4 8 Precision 4 9 Test report 4 Annex A (informative) Examples of temperature and heating time 6 Figure 1 Specimen dimensions and gauge lengths 5 Table A.1 Recommended temperatures 6BS EN ISO 11501:2004 ii BSI 21 September 2004 National foreword This Part of BS
8、2782 has been prepared by PRI/75. It is identical with ISO 11501:1995, Plastics Film and sheeting Determination of dimensional change on heating, published by the International Organization for Standardization (ISO). The Technical Committee has reviewed the provisions of ISO 291:1977, to which refer
9、ence is made in the text, and has decided that they are acceptable for use in conjunction with this standard. This publication does not purport to include all the necesssary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of it
10、self confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.EUROPEAN S
11、TANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11501 July 2004 ICS 83.140.10 English version Plastics Film and sheeting Determination of dimensional change on heating (ISO 11501:1995) Plastiques Film et feuille Dtermination de la variation dimensionnelle aprs chauffage (ISO 11501:1995) This European
12、 Standard was approved by CEN 21 June 2004. 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 national standard without any alteration. Up-to-date lists and bibliographical references concerning
13、such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official version (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own languag
14、e and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malt
15、a, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 2004 CEN All rights of exploi
16、tation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11501:2004 EEN ISO 11501:2004 BSI 21 September 2004 2 Foreword The text of ISO 11501:1995 has been prepared by Technical Committee ISO/TC 61, Plastics, of the International Organization for Standardizati
17、on (ISO) and has been taken over as EN ISO 11501:2004 by Technical Committee CEN/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 January
18、2005, and conflicting national standards shall be withdrawn at the latest by January 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denma
19、rk, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 11501:1995 has been approved by CEN as E
20、N ISO 11501:2004 without any modification. NOTE Normative references to International Standards are listed in Annex ZA (normative). Contents Page Foreword Inside front cover 1S c o p e 3 2 Normative reference 3 3P r i n c i p l e 3 4 Apparatus 3 5 Test specimens 3 6 Procedure 3 7 Expression of resul
21、ts 4 8 Precision 4 9 Test report 4 Annex A (informative) Examples of temperature and heating time 6 Annex ZA (normative) Normative references to international publications with their relevant European publications 7 Figure 1 Specimen dimensions and gauge lengths 5 Table A.1 Recommended temperatures
22、6EN ISO 11501:2004 BSI 21 September 2004 3 1 Scope This International Standard specifies a method of determining the dimensional change, in the longitudinal and transverse directions, of plastic films and sheeting on heating. This method may be applied to plastic sheets, whether qualified as thermos
23、hrinking or not, up to 1 mm thick. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and par
24、ties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 291:1977, Plastics Standard atmospheres
25、 for conditioning and testing. 3 Principle The test consists of a) measuring the initial lengths of two gauge lengths marked on each specimen in the longitudinal and in the transverse direction; b) heating the specimens for a specified time at a specified temperature on a kaolin bed in an oven; c) m
26、easuring the longitudinal and transverse gauge lengths again after cooling, and subsequently calculating the changes in the gauge lengths. 4 Apparatus 4.1 Circulating-air oven, of such a size that the total volume of the test assemblies (kaolin beds plus test specimens) does not exceed 10 % of the f
27、ree space in the oven. Provision shall be made for placing the test assemblies on shelves so that they are not less than 50 mm from each other and from the sides of the oven. Provision shall be made for circulation of air through the oven at a rate which gives a minimum of six air changes per hour.
28、The temperature of the oven shall be thermostatically controlled to maintain the temperature of the test assemblies within 2 C of the specified temperature (within 1 C if the specified temperature is less than 100 C). 4.2 Metal container, containing a kaolin bed of depth approximately 20 mm. Its oth
29、er dimensions shall be such that the specimens can be placed flat within it, without deformation, and such that it can be placed in the oven. 4.3 Temperature-measuring device, whose tip can be immersed in the kaolin bed. 4.4 Graduated scale, capable of measuring to the nearest 0,5 mm. 4.5 Stopwatch
30、5 Test specimens Samples of film or sheet shall be conditioned for a minimum of 2 h in one of the standard atmospheres specified in ISO 291 prior to cutting out and measuring test specimens. Three specimens shall be prepared, with approximate dimensions of 120 mm 120 mm, cut from the centre and two
31、sides of the film or sheet. The side specimens shall be taken at least 50 mm from the edge of the film or sheet. 6 Procedure Place the metal container containing the kaolin bed (4.2) in the oven (4.1) and control the temperature such that the bed is within the specified temperature limits. Mark the
32、longitudinal (or machine) direction and the transverse direction of the sheet on the specimens as indicated in Figure 1.EN ISO 11501:2004 4 BSI 21 September 2004 Mark the longitudinal and transverse gauge lengths (L 0and T 0 ) centrally on the specimens as indicated in Figure 1 and measure each to t
33、he nearest 0,5 mm using the graduated scale (4.4). Dust the specimens with kaolin and place them flat on the kaolin bed. Maintain the bed at the specified temperature for the period of time applicable to the material under test. Examples of temperatures and heating times are given in Annex A for a v
34、ariety of film and sheeting materials. At the end of the heating period, remove the specimens from the kaolin bed and condition them for at least 30 min in the same atmosphere as was used to condition the sample. Remeasure the longitudinal and transverse gauge lengths (L and T). 7 Expression of resu
35、lts For each specimen, calculate the change in the longitudinal and transverse gauge lengths, expressing the change as a percentage of the initial gauge length, using the equations: and NOTE 1 %L and %T can be positive or negative. A negative value corresponds to shrinkage and a positive value to el
36、ongation of the film or sheet. Calculate the mean value for the three specimens, in each direction (longitudinal and transverse), rounding the result to one place of decimals. 8 Precision The precision of this test method is not known because inter-laboratory data are not available. When inter-labor
37、atory data are obtained, a precision statement will be added at the following revision. 9 Test report The test report shall include the following information: a) a reference to this International Standard; b) all details necessary for the complete identification of the material tested; c) the test t
38、emperature; d) the heating time; e) the mean percentage change in gauge length; f) the direction of the change (longitudinal or transverse); g) the date of the test. where L 0and T 0are the original gauge lengths, in millimetres; L and T are the gauge lengths after heating, in millimetres.EN ISO 115
39、01:2004 BSI 21 September 2004 5 Figure 1 Specimen dimensions and gauge lengthsEN ISO 11501:2004 6 BSI 21 September 2004 Annex A (informative) Examples of temperature and heating time A.1 Heating time It is suggested that the following heating times be used for the test: 5 min for non-shrink film and
40、 sheeting which is not intended for processing at high temperatures. 30 min for film and sheeting which is intended to be thermoshrunk or thermoformed. A.2 Temperature Table A.1 may be used as a guide for the test. Table A.1 Recommended temperatures Values in degrees Celsius Material Non-shrink Ther
41、moshrinking/thermoforming Unplasticized PVC 85 125 Plasticized PVC 70 125 Chlorinated PVC 100 150 ABS 125 High-density polyethylene 125 150 Polypropylene 125 175 Cellulose acetate 125 150 PMMA 160 160 Low-density polyethylene 100 150EN ISO 11501:2004 BSI 21 September 2004 7 Annex ZA (normative) Norm
42、ative 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 text and the publications are listed
43、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 (including amendments). NOTE Whe
44、re an International Publication has been modified by common modifications, indicated by (mod.), the relevant EN/HD applies. Publication Year Title EN Year ISO 291 1997 Plastics Standard atmospheres for conditioning and testing EN ISO 291 1997BS EN ISO 11501:2004 BSI 389 Chiswick High Road London W4
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