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1、BS F 152:2006 Properties of silicone rubber sheet, mouldings and extrusions (general purpose) Specification ICS 49.025.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:0
2、6:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2006 ISBN 0 580 49383 0 The following BSI references relate to the work on this standard: Committee reference ACE/
3、65 Draft for comment 05/30130013 DC Publication history First published October 2006 Amendments issued since publication Amd. no.DateText affected BS F 152:2006 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI B
4、SI 2006i BS F152:2006 Contents Foreword ii 1Scope 1 2Normative references 1 3Terms and definitions 2 4Material 2 5Properties 3 6Test sheet manufacture 4 7Test methods 4 8Quality of material 5 9Marking, labelling and packaging 6 Annexes Annex A (normative) Manufacture of test sheet 7 Bibliography 8 L
5、ist of tables Table 1 Tests as moulded material 3 Table 2 Tests after exposure to heat ageing 4 Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 8, an inside back cover and a back cover. Licensed Copy: London South Bank University, London Sout
6、h Bank University, Sat Dec 09 03:06:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 152:2006 ii BSI 2006 Foreword Publishing information This British Standard was published by BSI and came into effect on 31 October 2006. It was prepared by ACE/65/-/25, Rubbers, elastomers and sealants, under the
7、authority of Technical Committee ACE/65, Inspection and testing requirements for non-metallic materials. A list of organizations represented on this committee can be obtained on request to its secretary. Information about this document This document supersedes DTD 5531A July 1981, which was declared
8、 obsolescent by the Ministry of Defence from 1 April 1999 and DTD 818 Class L, which was declared obsolescent by the Ministry of Defence in 1999. Hazard warnings WARNING. This British Standard calls for the use of substances and/or procedures that can be injurious to health if adequate precautions a
9、re not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. Use of this document It has been assumed in the preparation of this British Standard that the execution of its provisions will be entrusted to approp
10、riately qualified and experienced people, for whose use it has been produced. Presentational conventions The provisions of this standard are presented in roman (i.e. upright) type. Its requirements are expressed in sentences in which the principal auxiliary verb is “shall”. Commentary, explanation a
11、nd general informative material is presented in smaller italic type, and does not constitute a normative element. Contractual and legal considerations This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Complianc
12、e with a British Standard cannot confer immunity from legal obligations. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 20061 BS F 152:2006 1 Scope This British Standard specifies requirements for silicone
13、 rubber material possessing excellent ozone resistance properties intended for the production of items such as sheet, mouldings and certain extrusions for use in mainly mechanical applications in contact with air over the temperature range 65 C to 230 C1). This material standard is to be used in con
14、junction with BS EN 3207. NOTE 1 Material and products manufactured from this specification are not intended for liquid sealing or for an application where low compression set is of prime importance. NOTE 2 Occasional contamination by silicate ester and phosphate ester hydraulic fluids, di-ester gre
15、ases is not unduly detrimental provided the temperature is not excessive. Contact with fuels, light mineral oils, silicone liquids or greases derived from these should be avoided. NOTE 3 Further information on the suitability of silicone rubber for design applications can be found in SBAC Technical
16、Specification No. 97 1. NOTE 4 Marking BS F 152:2006 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is solely the claimants respon
17、sibility. Such a declaration is not to be confused with third party certification of conformity. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the reference cited applies. For undated references, the lates
18、t edition of the referenced document (including any amendments) applies. BS 903-A1 (ISO 2781), Physical testing of rubber Part A1: Determination of density BS 903-A6 (ISO 815), Physical testing of rubber Part A6: Method for determination of compression set at ambient, elevated or low temperatures BS
19、 903-A26 (ISO 48), Physical testing of rubber Part A26: Method for determination of hardness (hardness between 10 IRHD and 100 IRHD) BS 3734-1 (ISO 3302-1), Rubber Tolerances for products Part 1: Dimensional tolerances BS EN 3207, Rubber compounds Technical specification BS F 68, Controlled storage
20、of vulcanized rubbers for use in aerospace applications BS F 69, Packaging and identification of vulcanized rubber items 1) Silicone rubber products when properly stored at room temperature and, in the absence of hostile environments, deteriorate very slowly and, for most practical purposes, the sto
21、rage life may be considered indefinite. However, the rate of deterioration increases markedly with increase in temperature and the service life of the rubber therefore depends upon the operational temperature. Conversely, the maximum temperature at which the rubber may be used depends upon the usefu
22、l life required. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 152:2006 2 BSI 2006 BS ISO 34-1, Rubber, vulcanized or thermoplastic Determination of tear strength Part 1: Trouser, angle and crescent test
23、 pieces BS ISO 37, Physical testing of rubber Part A2: Method for determination of tensile stress Strain properties BS ISO 188 (BS 903-A19), Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests 3 Terms and definitions For the purposes of this British Standard, the followi
24、ng terms and definitions apply 3.1polymer material formed by joining together many (poly) individual units (mer) of one or more monomers 3.2vulcanization thermosetting reaction involving the use of heat and pressure, resulting in greatly increased strength and elasticity of rubber-like materials 4 M
25、aterial 4.1Material composition Silicone polymer shall consist of a homogeneous mix of recognized rubber quality products suitably compounded and cured to meet the requirements of this specification. No reclaimed or ground vulcanized waste shall be used in the mix. 4.2Manufacturing control Silicone
26、rubber material and products manufactured from this material shall be formulated and manufactured to issue controlled documentation, which shall form part of the contract between purchaser and manufacturer. Changes to the formulation or manufacturing process shall not be made without due considerati
27、on being given that the modified material/product meets all the requirements of the standard. 4.3Classification and grades Material shall be supplied in four nominal hardness grades: Grade 50; Grade 60; Grade 70; Grade 80. Licensed Copy: London South Bank University, London South Bank University, Sa
28、t Dec 09 03:06:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 20063 BS F 152:2006 Material or products manufactured to a nominal hardness grades other than those specified shall, with the exception of hardness, meet all the requirements of this specification specified for the grade embracing the
29、nominal hardness value. Tolerances, if required tighter than those specified within this specification, shall not be tighter than 3. NOTE For example, where a hardness of 65 is specified, the requirements of Grade 60 apply as the value of 65 lies within the 56 to 65 hardness range of Grade 60. 5 Pro
30、perties Material manufactured in accordance with Annex A shall meet the requirements specified in Tables 1 and 2. The first production batch and every subsequent 10th batch of material shall be fully tested in accordance with material standard line numbers specified in Tables 1 and 2. All other batc
31、hes of material shall be tested in accordance with material standard line numbers 1, 3 and 15 of Table 1. Table 1Tests as moulded material BS EN 3207 material standard line number TestTest requirement Grade 50 Grade 60Grade 70 Grade 80 1a) Hardness, IRHD50+5 p4 60+5 p4 70+5 p4 80+5 p4 2 3b) Density,
32、 Mg/m3Within 0.05 of requirement within controlling documentation. 4 5c) Tensile strength, MPOa (min.)5.55.55.55.5 6 7d) Elongation at break, % (min.)280250200160 8 9 10 11g) Tear strength, N/mm (min.)151512.512.5 12 13 14 15e) Compression set, % (max.)25252525 Licensed Copy: London South Bank Unive
33、rsity, London South Bank University, Sat Dec 09 03:06:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 152:2006 4 BSI 2006 6 Test sheet manufacture Manufacture sufficient test sheets and/or cylindrical buttons in accordance with Annex A for the determinations of properties required in Clause 8. 7
34、Test methods 7.1Accelerated ageing Test specimens, when required, shall be subjected to accelerated temperature ageing in accordance with BS ISO 188 for (336 2) h at (200 3) C. 7.2Determination of hardness 7.2.1As manufactured material Determination of hardness shall be conducted in accordance with
35、BS 903-A26, Method N on a specimen extracted from the thicker portion of the test sheet and superimposed upon the thinner section of the same sheet during test. 7.2.2Before and after heat ageing Determination of the effects of heat ageing on the hardness of the material shall be conducted in accorda
36、nce with BS 903-A26, Method N by testing two plies of the thinner section of the test sheet superimposed upon each other. Tests shall be carried out prior to and after accelerated heat ageing. Table 2Tests after exposure to heat ageing BS EN 3207 material standard line number TestTest requirement Gr
37、ade 50 Grade 60 Grade 70Grade 80 1 2Tests on standard test pieces unless otherwise specified after accelerated temperature ageing according to BS ISO 188. 3Permissible variation of the properties compared to the initial value 4 5Change in tensile strength, % of original value (max.) p20p20p20p20 6Ch
38、ange in elongation at break, % of original value (max.) p30p30p30p30 7Change in hardness, IRHD +7 p3 +7 p3 +7 p3 +7 p3 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 20065 BS F 152:2006 7.3Determination of
39、 density Determination of the density of the material shall be conducted in accordance with BS 903-A1, Method A. 7.4Determination of tensile strength and elongation at break 7.4.1As manufactured material Determination of the tensile strength and elongation at break shall be conducted in accordance w
40、ith BS ISO 37, using Type 2 dumb-bell specimens extracted from the thinner section of the test sheet. 7.4.2Before and after heat ageing Determination of the effects of heat ageing on the tensile strength and elongation at break shall be conducted in accordance with BS ISO 37, using Type 2 dumb-bell
41、specimens extracted from the thinner section of the test sheet. Tests shall be carried out prior to and after accelerated heat ageing. 7.5Determination of compression set Determination of compression set shall be conducted in accordance with BS 903-A6, using Type B specimens extracted from the thick
42、er section of the test sheet or on moulded cylindrical buttons. The specimens shall be subjected to (150 2) C for 24 0 p2 h. 7.6Determination of tear strength Determination of tear strength shall be conducted in accordance with BS ISO 34-1, Method C on specimens extracted from the thinner section of
43、 the test sheet. 8 Quality of material 8.1Quality assurance documentation Quality assurance documentation for each batch of material or manufactured products shall be in accordance with BS EN 3207. 8.2Rubber products 8.2.1Manufacture Rubber products shall be manufactured from material conforming to
44、the requirements of this specification. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 152:2006 6 BSI 2006 8.2.2Sampling 8.2.2.1General The rate of sampling of products and the method of test shall be agr
45、eed between the purchaser and the manufacturer and shall include the following. 8.2.2.2Mechanical properties Requirements of tests carried out on test specimens extracted from products shall be agreed between purchaser and manufacturer if not conforming to the requirements of Tables 1 and 2. The typ
46、e of test specimen and the method of extraction and preparation shall be agreed between purchaser and manufacturer and documented. 8.2.2.3Physical properties Products shall be smooth and free from surface imperfections, porosity, voids, inclusions, flow marks or inadequate joint of moulding blank an
47、d other defects that would impair satisfactory performance. NOTE Items may be specified with shallow cloth marking on one or more surfaces. 8.2.2.4Chemical tests At a frequency agreed between the purchaser and manufacturer, chemical analysis testing shall be carried out to show composition conforman
48、ce to Clause 4 of this specification. 8.2.3Dimensional properties Dimensions and tolerances of moulded products and the method of measurement shall be in accordance with BS 3734-1 unless otherwise agreed between purchaser and manufacturer. 9 Marking, labelling and packaging Packaging and labelling o
49、f products shall conform to BS F 69. Products shall be stored in accordance with BS F 68. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 20067 BS F 152:2006 Annex A (normative)Manufacture of test sheet Manufacture test sheets 250 mm to 300 mm square, (2.00 0.15) mm thick, with a section along one edge 35 mm to 50 mm wide and (6.30 0.15) mm