1、BRITISH STANDARD BS 7442-0: 1991 Rubber or plastics covered rollers Part 0: IntroductionBS7442-0:1991 This British Standard, having been prepared under the directionof the Plastics and Rubber Standards Policy Committee, was published underthe authority of the Standards Board and comes intoeffect on
2、31 October 1991 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference PRM/73 Draft for comment 91/37680 DC ISBN 0 580 20054 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Plastics and Rubber
3、 Standards Policy Committee (PRM/-) to Technical Committee PRM/73, upon which the following bodies were represented: British Rubber Manufacturers Association Ltd. British Structural Bearings Manufacturers Association Building Employers Confederation Department of the Environment (Building Research E
4、stablishment) Department of Transport Institute of Medical Laboratory Sciences Institution of Structural Engineers Malaysian Rubber Producers Research Association Ministry of Defence Royal Society of Chemistry Amendments issued since publication Amd. No. Date CommentsBS7442-0:1991 BSI 09-1999 i Cont
5、ents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 End-uses 1 4 Test methods 1 5 Selection of roller covering materials 1 6 Storage 1 Publication(s) referred to Inside back coverBS7442-0:1991 ii BSI 09-1999 Foreword This Part of BS 7442 has been prepared unde
6、r the direction of the Plastics and Rubber Standards Policy Committee. Its purpose is to provide a general introduction to a series of Parts of BS 7442 dealing with rubber or plastics covered rollers. Although BS 7442 is directed mainly at manufacturers and users of rubber covered rollers, it is rec
7、ognized that some roller coverings, such as polyurethanes, are regarded by some as a “rubber” covering and by others as a “plastics” covering. Parts of BS 7442 have been, or will be, published as follows: Part 1: Glossary of terms; Part 2: Recommendations for technical information to be provided by
8、the purchaser; Part 3: Methods of test; Part 4: Specifications. 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 confer immunity f
9、rom 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 in the amendmen
10、t table on the inside front cover.BS7442-0:1991 BSI 09-1999 1 1 Scope This Part of BS7442 provides an introduction to a series of Parts of BS7442 related to rubber or plastics covered rollers. It draws attention to a number of end-uses, methods of test related to the roller covering and the covered
11、roller and also to other relevant British Standards. The roller or core material is outside the scope of BS7442. NOTEThe titles of publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS7442 the definitions given in BS1755, BS3
12、558 and BS7442-1 apply, together with the following: rubber (or plastics) covered roller a nominally cylindrical core, usually of metal, upon which is bonded a covering or coverings of vulcanized or thermoplastic rubber or plastics materials 3 End-uses Rubber or plastics covered rollers have a varie
13、ty of end-uses in a number of industries. They are employed in coating and laminating textiles, wood, paper, and plastics, in impregnating absorbent surfaces with dyestuffs, adhesives and resins, and in printing patterns and reliefs onto textiles, paper, plastics and similar materials (see BS6243 an
14、d BS6545). They are also used for their frictional properties in textile spinning (seeBS 2794-2), paper processing, in calendering of plastics and film and in the food and associated industries for such processes as rice milling and oil extraction. NOTEThese are examples only, and the list is not in
15、tended to be exhaustive. 4 Test methods 4.1 Types of test Test methods for rubber or plastics covered rollers can be categorized broadly as either: a) those designed specifically for use with covered rollers (see4.2); or b) those applicable to the roller covering material (see4.3). 4.2 Covered rolle
16、r tests Tests on covered rollers are designed mainly to measure: a) apparent hardness, (seePart3 of this BritishStandard); b) the surface eccentricity relative to the shaft or journal axis (i.e.departure from roundness) (seeBS6740); c) the surface roughness of the roller covering (seefor exampleBS11
17、34). 4.3 Roller covering tests Tests on roller covering materials are designed mainly to measure: a) compression set (seefor example BS903-A6 for rubber); b) energy absorption or resilience (seefor exampleBS 903-A8 for rubber); c) abrasion resistance (seefor example BS 903-A9 for rubber); d) resista
18、nce to liquids (seefor example BS903-A16 for rubber); e) heat resistance and ageing (seefor example BS903-A19 for rubber); f) frictional properties (for rubber a further Part of BS903 is envisaged). 5 Selection of roller covering materials 5.1 End-use demands Rubber or plastics covered rollers have
19、a wide variety of uses and each end use imposes its own particular set of demands on the roller covering material. For this reason it is essential that the manufacturer of the roller covering is made aware of all the conditions of use of the covered roller and of the demands that will be made of the
20、 roller covering by the user. A questionnaire suitable for this purpose is described in Part2 1)of this BritishStandard. 5.2 Polymer data Information on the properties of different types of rubber materials is given in BS 6716 and ISO/TR 7620. 6 Storage As far as practicable, roller covering materia
21、ls and covered rollers should be stored in accordance with BS 3574. 1) In preparation.2 blankBS7442-0:1991 BSI 09-1999 Publication(s) referred to BS 903, Physical testing of rubber. BS 903-A6, Determination of compression set after constant strain. BS 903-A8, Method for determination of rebound resi
22、lience. BS 903-A9, Determination of abrasion resistance. BS 903-A16, Determination of the effect of liquids. BS 903-A19, Heat resistance and accelerated ageing tests. BS 1134, Assessment of surface texture. BS 1134-1, Methods and instrumentation. BS 1755, Glossary of terms used in the plastics indus
23、try. BS 2794, Specification for textile machinery and accessories drafting equipment for preparation and spinning machinery. BS 2794-2, Spinning preparatory and spinning machinery covering characteristics of top rollers. BS 3558, Glossary of rubber terms. BS 3574, Specification for the controlled st
24、orage and packaging of vulcanized rubber and rubber products. BS 6243, Method for the determination of the specific strength factor of textile machinery hollow section guide rollers. BS 6545, Specification for main dimensions of, and terminology for, cloth rollers in textile machinery. BS 6716, Guid
25、e to properties and types of rubber. BS 6740, Method for determining departures from roundness by measuring variations in radius. BS 7442, Rubber of plastics covered rollers. BS 7442-1, Glossary of terms. BS 7442-2, Recommendations for technical information to be provided by the purchaser 2) . BS 74
26、42-3, Methods of test. ISO/TR 7620, Rubber materials Chemical resistance. 2) In preparation.BS 7442-0: 1991 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in
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