《BS-1763-1975.pdf》由会员分享，可在线阅读，更多相关《BS-1763-1975.pdf（24页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS 1763:1975 Specification for Thin PVC sheeting (calendered, flexible, unsupported) UDC 678.743.22 416:678.027.2 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:19:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1763:1975 This British Standard, having been approved by th
2、e Plastics Industry Standards Committee, was published under the authority of the Executive Board on 31 July 1975 BSI 04-1999 First published September 1951 First revision July 1956 Second revision January 1967 Third revision June 1975 The following BSI references relate to the work on this standard
3、: Committee reference PLC/40 Draft for comment 70/25737 ISBN 0 580 08173 7 Co-operating organizations The Plastics Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and indust
4、rial organizations. British Resin Manufacturers Association British Plastics Federation* Chemical Industries Association Department of the Environment Building Research Establishment Department of Industry Electrical and Electronic Insulation Association Electrical Installation Equipment Manufacture
5、rs Association Electrical Research Association* Engineering Equipment Users Association Ministry of Defence* Plastics Institute Post Office Royal Institute of British Architects Royal Institute of Public Health and Hygiene Rubber and Plastics Research Association of Great Britain* Society of Motor M
6、anufacturers and Traders Ltd.* The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard. Consumer Standards Advisory Committee of BSI Packaging and Industrial Films Ass
7、ociation PIRA (Research Association for the Paper and Board, Printing and Packaging Industries) Retail Trading Standards Association Telecommunication Engineering and Manufacturing Association Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, n
8、a, Fri Nov 24 08:19:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1763:1975 BSI 04-1999i Contents Page Co-operating organizationsInside front cover Forewordii 1Scope1 2References1 3Definitions1 4Composition2 5Sampling2 6Marking2 7Visual examination2 8Requirements for physical properties2 9Limitin
9、g values in relation to statistical control3 10Thickness3 11Blocking4 Appendix A Recommended scheme for the selection of test pieces8 Appendix B Method of visual examination8 Appendix C Method of determining number of pin-holes8 Appendix D Method of determining sulphur stain resistance9 Appendix E M
10、ethod of determining gravimetric thickness of the sample9 Appendix F Method of determining average gravimetric thickness of the sheeting in a roll9 Appendix G Method of determining dimensional stability11 Appendix H Method of determining tear strength11 Appendix J Method of determining retention of
11、embossed surface12 Appendix K Method of determining low temperature extensibility12 Appendix L Method of determining extensibility after heat ageing12 Appendix M Recommended procedure for informative labelling13 Figure 1 Selection of test pieces7 Figure 2 Frame for method for determining number of p
12、in-holes15 Figure 3 Tear testing apparatus of the Elmendorf type15 Table 1 Limiting values for properties requiring frequent determination5 Table 2 Limiting values for properties requiring occasional determination5 Table 3 Limiting values for gravimetric thickness of the sample6 Table 4 Limiting val
13、ues for average gravimetric thickness of the sheeting in a roll6 Publications referred to16 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:19:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1763:1975 ii BSI 04-1999 Foreword This British Standard, prepared under the authority of the Plast
14、ics Industry Standards Committee, is one of a series for flexible polyvinyl chloride materials. It was first published in 1951 and subsequently revised in 1956 and 1967. The standard is based on technical data provided by the British Plastics Federation. Other standards in the series are: BS 1774, R
15、ainwear from PVC sheeting. BS 1776, Fabrication of lightweight articles (other than rainwear) from polyvinyl chloride sheeting. BS 2739, Thick PVC sheeting (calendered, flexible, unsupported). BS 3878, Flexible PVC sheeting for hospital use. In this revision the principal change is in the use of met
16、ric units. Clauses 11 to 12 in the 1967 edition have been deleted as they were considered to be superfluous. During 1973-4 several discussions took place in the Executive Board of BSI as a result of concern about potential fire hazards involved in the rapidly increasing use of many polymeric materia
17、ls, especially for furnishing and construction purposes. Issues of great public importance were involved, relating in particular to the use of laboratory fire tests to define quality requirements, in view of the general lack of correlation between the results obtained in such small-scale tests and t
18、he fire performance of materials and products in actual conditions of use. The Executive Board decided that a detailed review of all the issues involved should be carried out as a matter of urgency, and that this should be comprehensive in scope rather than limited to polymeric materials. For this p
19、urpose an authoritative Co-ordinating Committee on Fire Tests was established. In the meantime certain general principles were laid down regarding the terminology and approach to be adopted in immediate revisions and amendments of the British Standards involving small-scale fire tests. In keeping wi
20、th this policy the type designations and descriptions in this standard have been changed to avoid using the reference “F” and the term “flame resistant”, which might be misinterpreted as applying to situations other than those of the specified test conditions. The principle of statistical control of
21、 certain properties has been retained, as it has been shown by experience that the variability of results both within the material itself and from certain test methods is such that very low single-level limits would need to be specified if satisfactory material was not to be rejected. The value of s
22、tatistical control to the purchaser is as follows. a) It gives an assurance that in a sequence of samples tested, only occasional samples will have a quality as represented by the specified limit (L) for single samples and that over a period the average quality will be at least as good as the specif
23、ied limitfor a large number of samples. In practice thelimits can be, and frequently are, exceeded in individual manufacturing “batches”. b) In the long run, differences of quality will be readily distinguished and relatively small trends will be detected. c) Control chart or other statistical contr
24、ol techniques can be applied whereby test data obtained by the purchaser can be effectively compared with the much greater amount of data obtained by the manufacturer, if appropriate arrangements are made to do so. Those purchasers of PVC sheeting for whom it would be inconvenient to carry out sampl
25、ing and testing on their own account may wish to rely on the independent assurances of the BSI Certification Trade Mark. X()X() Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:19:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1763:1975 BSI 04-1999iii By the application of this principle,
26、 it is intended to bring about a general improvement in quality of material complying with the requirements of this standard. Further details of the principle are given in the notes to the appropriate clause. The lower thickness limit of 100 4m has been removed, as there is no reason why, provided t
27、he remaining requirements of this standard are satisfied, thinner sheetings should not be used for many applications quite satisfactorily, and indeed they are being so used. It will be noted that the thickness range of this standard overlaps that of BS 2739. This is because the uses of thin and thic
28、k sheetings have been shown to require these thickness ranges and, in the overlapping region, thickness is not the feature determining the suitability of the sheeting. The test method for extensibility after heat ageing is known not to be entirely reliable and a new method is being developed. It is
29、hoped to issue an appropriate amendment in due course. Consideration has been given to providing a means whereby the readiness with which sheeting can be welded could be assessed, but attempts to produce a laboratory test which measures this property have failed, due to the wide variation in electro
30、de systems, machines and techniques in common usage. Certification. Attention is drawn to the certification facilities described on the inside back cover of this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respon
31、sible for their correct application. Compliance 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 to iv, pages 1 to 16, an inside back cover and a back cover. This standard has bee
32、n updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:19:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun
33、, na, Fri Nov 24 08:19:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1763:1975 BSI 04-19991 1 Scope This British Standard applies to flexible unsupported thin calendered PVC sheeting in the nominal thickness range up to and including 400 4m, complying with the appropriate requirements of clauses
34、4 to 11 and Table 1 to Table 4, and classified as follows: NOTEOdd numbers in the type references apply to unprinted sheeting and even numbers to printed sheeting in this British Standard and in BS 2739. 2 References The titles of the British Standards referred to in this standard are listed on the
35、inside back cover. 3 Definitions For the purposes of this British Standard, the following definitions apply. 3.1 thin sheeting calendered flexible, unsupported PVC sheeting in the nominal thickness range up to and including 400 4m NOTEThe term “film” is sometimes used in a general sense in commerce
36、to mean unsupported thin sheeting at the lower end of the range of thickness covered by this standard, but it is recommended that this term should not be applied to PVC sheeting above 75 4m nominal thickness. 3.2 nominal thickness the thickness of sheeting in micrometres as stated by the supplier NO
37、TEWhen agreed between the purchaser and the supplier the thickness may be expressed in millimetres. 3.3 gravimetric thickness the value of thickness derived from the mass of a known area of sheeting and its relative density by method 512A of BS 2782:1970, except that it is expressed in micrometres N
38、OTEWhen agreed between the purchaser and the supplier the thickness may be expressed in millimetres. 3.4 micrometer thickness the value of thickness determined by direct measurement using a micrometer gauge by method 512B or BS 2782:1970, except that it is expressed in micrometres. This method is no
39、t suitable for embossed sheeting NOTEWhen agreed between the purchaser and the supplier the thickness may be expressed in millimetres. 3.5 printed sheeting sheeting to which a continuous or discontinuous transparent or coloured surface coating has been applied and including all multitone effects and
40、 lacquered surfaces 3.6 embossed sheeting printed or unprinted sheeting having a raised or indented pattern, also known as textured sheeting NOTEPlain frosted (matt) or polished PVC sheeting, if produced by an operation subsequent to the calendering process is, by convention, included in this defini
41、tion. 3.7 laminated sheeting superimposed plies (layers) of single sheeting bonded together by any suitable process 3.8 roll of sheeting sheeting in roll form, in length not less than 10 m, as supplied by the manufacturer 3.9 sample of sheeting a sample taken in accordance with clause 5 3.10 sequenc
42、e of samples all samples of sheeting tested by the manufacturer or the purchaser, and manufactured to comply with the requirements of this standard, during a period not exceeding six months Type 1AGeneral purpose unprinted single or laminated thin sheeting with a plain or embossed surface Type 2AThi
43、n sheeting of type 1A, printed. Type 1BUnprinted single or laminated thin sheeting with a plain or embossed surface complying with the requirements for distance of travel of flame given in Table 2. Type 2BThin sheeting of type 1B, printed. It does not apply to transparent polished sheeting, often re
44、ferred to as “glass-clear” sheeting. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:19:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1763:1975 2 BSI 04-1999 4 Composition All sheeting in accordance with this British Standard shall be manufactured from a polymer of vinyl chloride and/or
45、 a copolymer, the major constituent of which shall be vinyl chloride. Such material shall be suitably compounded and converted, by calendering, into sheeting of nominal thickness up to and including 400 4m. Sheeting of types 1B and 2B may be formulated by any suitable means to ensure that specimens
46、of 550 mm 35 mm when tested by method 508C (as amended in 1974) of BS 2782:1970 shall meet the requirement for distance of travel of flame in Table 2. 5 Sampling A representative sample which is the full width of the sheeting, not less than 1 m2 in area and not less than 1 m in length shall be taken
47、. The longitudinal direction of the sheeting shall be marked on the sample. The information given on the label shall be supplied with the sample. To avoid difficulties in subsequent testing, the sample should be rolled on a tube of adequate diameter. The sample shall thereafter be kept out of contac
48、t with other plastics materials. When sheeting in roll form is being sampled, the sample shall be taken from a position in which no part of it is less than three layers from either end of the roll. The preferred manner of selecting test pieces from the sample is given in Appendix A. For visual exami
49、nation only, either a sample at least 3 m in length by the full width of the sheeting shall be taken, or an equivalent uncut length of the roll shall be examined by the method specified in Appendix B. If it is desired to carry out the test for determining the number of pin-holes (see Appendix C), arrangements should be made by the manufacturer or the purchaser for a larger representative sample to be supplied. 6 Marking Sheeting supplied in accordance with this British Standard shall bear a label giving the following information. a) Name and/or trade mark of