BS-6057-3.24-1992 ISO-498-1992.pdf
《BS-6057-3.24-1992 ISO-498-1992.pdf》由会员分享,可在线阅读,更多相关《BS-6057-3.24-1992 ISO-498-1992.pdf(8页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 6057-3.24: 1992 ISO 498:1992 Rubber latices Part 3: Methods of test Section 3.24 Preparation of dry films from natural rubber latex concentrate NOTEAttention is drawn to BS 6057-0 General introduction, issued separately. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:2
2、1:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6057-3.24:1992 This British Standard, having been prepared under the direction of the Plastics and Rubber Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 August 1992 BSI 10-1999 The fo
3、llowing BSI references relate to the work on this standard: Committee reference PRM/51 Draft announced in BSI News, July 1992 ISBN 0 580 21087 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Plastics and Rubber Standards Policy Committ
4、ee (PRM/-) to Technical Committee PRM/51, upon which the following bodies were represented: British Rubber Manufacturers Association Malaysian Rubber Producers Research Association Medical Sterile Products Association Tropical Growers Association Amendments issued since publication Amd. No.DateComme
5、nts Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:21:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6057-3.24:1992 BSI 10-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Apparatus1 4Sampling1 5Procedure1 List of reference
6、sInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:21:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6057-3.24:1992 ii BSI 10-1999 National foreword This Section of BS 6057 has been prepared under the direction of the Plastics and Rubber Standards Policy Committee and is
7、identical with ISO 498:1992 Natural rubber latex concentrate Preparation of dry films, published by the International Organization for Standardization (ISO). This Section of BS 6057 supersedes clause 21 of BS 1672:1972, which will be deleted by amendment. A British Standard does not purport to inclu
8、de 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 confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard ISO 123:1985BS
9、6057 Rubber latices Part 2:1987 Sampling (Identical) ISO 124:1992BS 6057 Rubber latices Section 3.2:1992 Determination of total solids contents of rubber latices (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back c
10、over and a back cover. This 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. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:21:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
11、6057-3.24:1992 BSI 10-19991 1 Scope This International Standard specifies a method for preparing dry, homogeneous films, substantially free of air bubbles, from natural rubber latex concentrate. The procedure is not necessarily suitable for latices from natural sources other than Hevea brasiliensis
12、or for compounded latex, vulcanized latex or artificial dispersions of rubber or synthetic rubber latices. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the ed
13、itions indicated were 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 editions of the standards indicated below. Members of IEC and ISO maintain registers of current
14、ly valid International Standards. ISO 123:1985, Rubber latex Sampling. ISO 124:1992, Rubber latices Determination of total solids content. 3 Apparatus 3.1 Suitable mould, in which the film can be cast, prepared by cementing strips of glass or a rigid plastic material 6 mm wide and 1,5 mm thick on a
15、flat piece of glass plate. The cavity so formed shall be of an adequate size to provide suitable specimens for testing, e.g. with sides of 100 mm to 150 mm. NOTE 1As a result of the effect of surface tension, areas of the film around the edges may be thicker than at the centre. Adhesives suitable fo
16、r affixing the strips to the glass are epoxide resin adhesives, and poly(vinyl acetate) dissolved in methyl ethyl ketone. Such a mould will give dry films about 1 mm thick when filled with latex of 62 % (m/m) total solids content. 3.2 Square-mesh gauze, of polyamide or stainless steel, with an avera
17、ge aperture width of 180 4m 10 4m, for straining the latex. 3.3 Straightedge, wooden, plastic or stainless steel, with which to scrape the surface of the latex in the mould free of air bubbles. 3.4 Cabinet or covered space, clean, dry and dust-free, with a level surface on which to place the mould.
18、3.5 Oven, capable of maintaining a temperature of 35 C 2 C. 3.6 Cellulosic-film sheets, thin, clear and transparent, to cover and protect the dry film. 3.7 Desiccator or airtight container, for storing the dry film. 3.8 Beaker, of suitable capacity, e.g. 50 cm3. 4 Sampling Carry out the sampling in
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- BS-6057-3.24-1992 ISO-498-1992 BS 6057 3.24 1992 ISO 498
链接地址:https://www.31doc.com/p-3772961.html