BS 1155-2003.pdf
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1、BRITISH STANDARD BS 1155:2003 Natural rubber compounds for extrusion Specification ICS 83.060 ? Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:19:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1155:2003 This British Standard was published under the authority of the Standards Policy and
2、Strategy Committee on 18 June 2003 BSI 18 June 2003 The following BSI references relate to the work on this British Standard: Committee reference PRI/54 Draft for comment 02/122015 DC ISBN 0 580 41851 0 Committees responsible for this British Standard The preparation of this British Standard was ent
3、rusted to PRI/54, Rubber compounds, upon which the following bodies were represented: British Rubber Manufacturers Association Ltd. Chemical Industries Association Ministry of Defence RAPRA Technology Ltd. Tun Abdul Razak Research Centre Amendments issued since publication Amd. No.DateComment Licens
4、ed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:19:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1155:2003 BSI 18 June 2003 i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Normative references1 3Classification1 4Composition1 5Preparation of test sheet2 6Physical p
5、roperties of the vulcanized test sheet2 7Marking2 Annex A (informative) Guidance for the preparation and testing of rubber products4 Annex B (informative) Line call-outs4 Bibliography5 Table 1 Compound classification1 Table 2 Physical properties of two-thickness test sheets3 Table B.1 Line call-outs
6、4 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:19:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1155:2003 ii BSI 18 June 2003 Foreword This British Standard has been prepared under the direction of the PRI/54, Rubber compounds. It supersedes BS 1155:1992 which is withdrawn. One techn
7、ical change has been made, namely the inclusion of the larger type 1 dumbbell of BS 903-A2 as an alternative to the type 2 dumbbell for the measurement of tensile strength and elongation at break (Table 2). This edition otherwise comprises an editorial revision of the 1992 standard, in which the pre
8、sentation has been changed to align the text with other British Standards in the group. Other British Standards in this group for rubber compounds are as follows: BS 1154, Specification for natural rubber compounds. BS 2751, Specification for general purpose acrylonitrile-butadiene rubber compounds.
9、 BS 2752, Specification for chloroprene rubber compounds. BS 3227, Specification for butyl rubber compounds (including halobutyl compounds). BS 6014, Specification for ethylene propylene rubber compounds. BS 6996, Specification for mineral oil resistant acrylonitrile-butadiene rubber compounds. The
10、following British Standards are also relevant to this standard. BS 3558, Glossary of rubber terms. BS 3734-1, Rubber Tolerances for products Part 1: Dimensional tolerances. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct
11、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 ii, pages 1 to 5 and a back cover. The BSI copyright notice displayed in this document indicates when t
12、he document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:19:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1155:2003 BSI 18 June 2003 1 1 Scope This British Standard specifies compositional and physical property requirements for four non-black natural rubber compounds
13、 designated R40, R50, R60, R70, three non-black natural rubber/zinc oxide compounds designated S40, S50, S60 and five black natural rubber compounds designated T40, T50, T60, T70, T80. These compounds are intended for the manufacture of items in the form of extrusions and items cut from extruded sec
14、tions, e.g. washers. NOTE 1The compounds do not necessarily have good electrical insulating properties. NOTE 2The compounds might not be suitable for use when special properties are required, such as improved ozone or heat resistance, freedom from tarnishing of some metallic components (copper, silv
15、er), long term low temperature use or seals in castor oil based fluid systems. The natural rubber compounds specified in this standard do not require to be compounded to be resistant to ozone attack and their resistance to ozone is not tested. Potential users should seek technical advice if they are
16、 unsure as to whether ozone resistance is required for their application. There is currently no British Standard for ozone resistant natural rubber compounds. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only
17、the reference cited applies. For undated references, the latest edition of the referenced document (including any amendments). BS 903-A1:1996, Physical testing of rubber Part A1: Determination of density. BS 903-A2:1995, Physical testing of rubber Part A2: Method for determination of tensile stresss
18、train properties. BS 903-A6:1992, Physical testing of rubber Part A6: Method for determination of compression set at ambient, elevated or low temperatures. BS 903-A19:1998, Physical testing of rubber Part A19: Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests. BS 903-A
19、26:1995, Physical testing of rubber Part A26: Method for Determination of hardness (hardness between 10 IRHD and 100 IRHD). 3 Classification Compounds shall be classified according to their vulcanized hardness in international rubber hardness degrees (IRHD), and designated by grade as shown in Table
20、 1. Table 1 Compound classification 4 Composition The compounds shall be based on high quality plantation (Hevea) rubber or superior processing rubber, or on a mixture of both. The high quality plantation (Hevea) rubber shall be one or any combination of the following: pale crepe, or RSS1, or latex
21、grade technically specified natural rubber. It shall be vulcanized with sulfur/organic accelerator(s) activated with up to 2 parts per hundred of rubber by mass (p.h.r) of stearic acid and a minimum of 5 p.h.r of zinc oxide. At least 1 p.h.r of an antioxidant shall be incorporated in the mix. Grade
22、designationHardness after vulcanization (IRHD) R40S40T40 R50S50T50 R60S60T60 R70T70 T80 40 4 +5 50 4 +5 60 4 +5 70 4 +5 80 4 +5 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 08:19:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1155:2003 2 BSI 18 June 2003 Compounds designated “R” shall be
23、 reinforced with non-black fillers. Compounds designated “S” shall be reinforced with zinc oxide only and shall contain no carbon black or mineral filler other than zinc oxide. Compounds designated “T” shall be reinforced with carbon black(s), or with carbon black(s) and zinc oxide, and shall contai
24、n no other fillers. If ingredients that facilitate processing, e.g. factice and/or softeners, are used in the mixes, the total amount excluding stearic acid shall not exceed 20 p.h.r. Any factice included shall only be a sulfur-vulcanized triglyceride oil type. No reclaimed rubber or ground vulcaniz
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