1、BRITISH STANDARD BS3396-2: 1987 Woven glass fibre fabrics for plastics reinforcement Part2: Specification for desized fabrics UDC678.067.5:677.521.074BS3396-2:1987 This British Standard, having been prepared under the directionof the Plastics StandardsCommittee, was published under the authority oft
2、he Board of BSIand comes intoeffect on 30 January 1987 BSI 04-1999 First published July1961 First revision November1966 Second revision January1987 The following BSI references relate to the work on this standard: Committee reference PLM/39 Draft for comment84/37184DC ISBN 0 580 15535 8 Committees r
3、esponsible for this British Standard The preparation of this British Standard was entrusted by the Plastics Standards Committee (PLM/-) to Technical Committee PLM/39, upon which the following bodies were represented: BEAMA Ltd. British Gas Corporation British Plastics Federation British Telecommunic
4、ations plc ERA Technology Ltd. Electrical and Electronic Insulation Association (BEAMA Ltd.) Engineering Equipment and Materials Users Association Greater London Council Ministry of Defence Process Plant Association Royal Institute of British Architects Ship and Boat Builders National Federation Soc
5、iety of British Aerospace Companies Limited Society of Motor Manufacturers and Traders Limited Standards Association of Australia (British Committees) The following body was also represented in the drafting of the standard, through subcommittees and panels: Imperial College of Science and Technology
6、 Amendments issued since publication Amd. No. Date CommentsBS3396-2:1987 BSI 04-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Construction 1 3 Selection of test samples 1 4 Packaging 1 5 Marking and identification 1 Appendix A Determination of residual size c
7、ontent 2 Figure 1 Combustion apparatus 2 Publications referred to Inside back coverBS3396-2:1987 ii BSI 04-1999 Foreword This Part of this British Standard has been prepared under the direction of the Plastics Standards Committee. It is a revision of BS3396-2:1966, which is therefore withdrawn. BS33
8、96 currently contains the following Parts. Part1: Specification for loom-state fabrics; Part2: Specification for desized fabrics; Part3: Specification for finished fabrics for use with polyester resin systems. In this revision the maximum allowable residual size content has been further reduced by o
9、mission of level W, and the marking clause has been aligned with Parts1 and3. 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. Compliance with a British Standard does not of itself con
10、fer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 and2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated i
11、n the amendment table on theinside front cover.BS3396-2:1987 BSI 04-1999 1 1 Scope This Part of this British Standard specifies the appearance and breaking strength requirements for woven glass fibre fabrics, specified in BS3396-1, which have been desized. It also gives packaging and marking require
12、ments for the fabrics. NOTEThe titles of the publications referred to in this standard are listed on inside back cover. 2 Construction 2.1 General The desized fabric shall be uniformly woven. It shall be free from streaks, stains, oil and grease spots, creases and wrinkles. It shall not be brittle o
13、r fused. 2.2 Residual size content The residual size content, after desizing, shall be not more than0.1% by mass, when determined by the method described in Appendix A. 2.3 Breaking strength The breaking strength of the desized fabric in the warp and weft directions, when determined by the method de
14、scribed in AppendixC of BS3396-1:1982, shall be not less than35% of the value specified in that standard for the same fabric in the loom-state condition. Alternatively if a) the desized fabric does not comply with its breaking strength requirement; or b) the desized condition of the fabric is an int
15、ermediate one preparatory to finishing by the same supplier in accordance with BS3396-3, then the strength shall be deemed to be adequate if the flexural strength requirements of Table1 of BS3396:1986-3 are satisfied. NOTEThe object of this alternative procedure is not to test the suitability of the
16、 fabric to produce satisfactory polyester resin laminates but to demonstrate that the fabric has not been permanently damaged in the desizing process. 3 Selection of test samples A sample shall be selected from each quantity of each fabric desized in the same desizing operation. The piece number and
17、 desizing batch number for each sample shall be recorded. 4 Packaging The fabric shall be rolled evenly onto tubes of sufficient length and strength, so that they will not collapse or telescope during transit, storage and handling. Both ends of the roll shall be protected to prevent damage to the ed
18、ges of the cloth. Each roll shall be individually wrapped and rolls of fabric shall be packed in parcels or boxes in such a way as to protect them from damage. 5 Marking and identification Each piece or roll of fabric shall be marked in the form of a code with the following information in the follow
19、ing general style for itemsa) toc): a) the number and date of this standard, i.e.BS3396/2:1987 1) ; b) the designation in accordance with BS3396-1:1982, e.g.P8/33; c) the piece number and desizing batch number, e.g.1234/5678; d) the manufacturers name or trade mark, e.g.AB and Co. Each of the compon
20、ents of the code shall be separated by a hyphen. For example, AB and Co.s P8/33 fabric having piece and desizing batch numbers of1234 and5678 respectively shall be identified as follows. BS3396/2:1987P8/331234/5678AB andCo. 1) Marking BS3396/2:1987 on or in relation to a product is a claim by the ma
21、nufacturer that the product has been manufactured to the requirements of the standard. The accuracy of such a claim is therefore solely the manufacturers responsibility. Enquiries as to the availability of third party certification should be addressed to the appropriate certification body.BS3396-2:1
22、987 2 BSI 04-1999 Appendix A Determination of residual size content A.1 Principle The determination of the residual size content is carried out by determining the loss in mass due to heating and igniting the residual size. NOTEAccurate values can only be obtained if the test is carried out after the
23、 material has been dried. The method uses differential weighing to determine a very small change in weight. Accordingly, it is important to prevent absorption of moisture by the specimen before each weighing. A.2 Apparatus A.2.1 Weighing bottle, approximate diameter50mm. A.2.2 Desiccator, charged wi
24、th phosphoruspentoxide. A.2.3 Combustion apparatus having the essential features A to E shown in Figure 1. A.2.4 Balance, accurate to0.0001g. A.2.5 Drying oven. A.2.6 Nickel-silver boat, approximate dimensions90mm 35mm 20mm. A.3 Procedure From a rectangular specimen of the desized fabric of mass app
25、roximately4g, fray out five threads from each side so as to leave a fringe. Roll the prepared specimen loosely and tie with a thread of glass yarn taken from the specimen. Determine to an accuracy of0.0001g the mass of the dried specimen after it has been put into the previously weighed weighing bot
26、tle(A.2.1), heated in the drying oven(A.2.5) for30min at105 2 C and cooled in the desiccator(A.2.2). Place the dried specimen in the previously dried and weighed nickel-silver boat(A.2.6), transfer to the combustion apparatus(A.2.3), and heat at a temperature of575 25 C. After heating for10min, draw
27、 through the tube containing the nickel-silver boat and specimen a current of air, dried by passage over calcium chloride and then over phosphorus pentoxide, whilst heating for a further5min. Quickly transfer the nickel-silver boat containing the specimen to the drying oven, which already holds the
28、previously weighed bottle. After the nickel-silver boat has cooled down, transfer this, together with its contents, to the weighing bottle prior to removing from the drying oven. Cool to room temperature in the desiccator and reweigh. Express the loss in mass of the specimen as a percentage of the o
29、riginal dry mass of the specimen. A.4 Test report Round off the percentage loss in mass of the specimen to the first place of decimals and report it as the residual size content. NOTEFor example, percentage losses in mass of0.050% to0.149% are reported as0.1%. Figure 1 Combustion apparatusBS3396-2:1
30、987 BSI 04-1999 Publications referred to BS3396, Woven glass fibre fabrics for plastics reinforcement. BS3396-1, Specification for loom-state fabrics. BS3396-3, Specification for finished fabrics for use with polyester resin systems. BS3396-2: 1987 BSI 389 Chiswick High Road London W4 4AL BSIBritish
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