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1、BRITISH STANDARD BS 903-A12: 1995 ISO 36:1993 Physical testing of rubber Part A12: Method for determination of the adhesion strength to textile fabric Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:57:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A12:
2、1995 This British Standard, having been prepared under the direction of the Materials and Chemicals Sector Board (I/-), was published under the authority of the Standards Board and comes into effect on 15 February 1995 BSI 03-1999 First published November 1958 Second edition October 1968 Third editi
3、on October 1975 Fourth edition February 1995 The following BSI references relate to the work on this standard: Committee reference PRI/22 Draft announced in BSI News November 1994 ISBN 0 580 23653 6 Committees responsible for this British Standard The preparation of this British Standard was entrust
4、ed to Technical Committee PRI/22 Physical testing of rubber, upon which the following bodies were represented: British Railways Board British Rubber Manufacurers Association Ltd. GAMBICA (BEAMA Ltd.) Malaysian Rubber Producers Research Association Ministry of Defence RAPRA TEchnology Ltd. SATRA Foot
5、wear Technology Centre Coopted member Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:57:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A12:1995 BSI 03-1999i Contents Page Committees responsible I
6、nside front cover National forewordii 1Scope1 2Normative references1 3Definition1 4Principle1 5Apparatus1 6Test piece1 7Number of test pieces1 8Time-interval between vulcanization and testing2 9Conditioning of test pieces and temperature of test2 10Procedure2 11Expression of results2 12Test report2
7、Figure 1 Position of line of separation of plies3 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:57:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A12:1995 ii BSI 03-1999 National foreword This Part of BS 903, which
8、has been prepared by Technical Committee PRI/22 is identical with ISO 36:1993, Rubber, vulcanized or thermoplastic Determination of adhesion to textile fabric, published by the International Organization for Standardization (ISO). This edition supersedes BS 903 which is withdrawn. This edition of Pa
9、rt A12 differs from the 1975 edition as follows. a) Ring test pieces are omitted. b) The nominal rate of ply separation is now 25 mm/min by using a standardized rate of jaw separation of 50 mm/min 5 mm/min (see clause 10) instead of the two permitted rates of jaw separation (100 mm/min and 50 mm/min
10、) permitted in earlier editions. c) The results are now expressed as the median of the peak values (see Part A47) instead of the mean value of the lowest 50 % of the peak values taken from the central 50 % of the trace, (see clause 11). Additional information. In the UK, the “standard temperature” (
11、see clause 9) is 23 C 2 C. NOTEThe standard temperature is commonly referred to as the “standard laboratory temperature”. Attention is also drawn to BS 3424-7 and BS 490-10.4 which are related respectively to ISO 2411 and ISO 252 for the determination of the adhesion strength of polymers to textiles
12、 and conveyor belting. 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 from legal obligations. Cross-references I
13、nternational standardCorresponding British Standard ISO 471:1983BS 903 Methods of testing vulcanized rubber Part A35:1985 Temperatures, humidities and times for conditioning and testing of test pieces (Identical) ISO 4661-1:1993BS 903 Physical testing of rubber Part A36:1994 Preparation of samples a
14、nd test pieces (Identical) ISO 5893:1993BS 5214 Specification for testing machines for rubbers and plastics Part 1:1994 Constant rate of traverse machines (Identical) ISO 6133:1981BS 903 Methods of testing vulcanized rubber Part A47:1982 Analysis of multi-peak traces obtained in determinations of te
15、ar strength and adhesion strength (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, 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
16、 indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:57:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 36:1993(E) BSI 03-19991 1 Scope This International Standard specifies a method of test for measur
17、ing the force required to separate, by stripping, two plies of fabric bonded with rubber, or a rubber layer and a fabric ply bonded together. The method is applicable when the ply surfaces are approximately plane, or are in the form of a cylinder having an internal diameter greater than approximatel
18、y 50 mm. The method is not applicable when the ply surfaces contain sharp bends, angles or other gross irregularities which cannot be excluded when cutting out test pieces. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions
19、of this International Standard. At the time of publication, the editions 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 ind
20、icated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 471:1983, Rubber Standard temperatures, humidities and times for the conditioning and testing of test pieces. ISO 4661-1:1993, Rubber, vulcanized or thermoplastic Preparation of samples and test p
21、ieces Part 1: Physical tests. ISO 5893:1993, Rubber and plastics test equipment Tensile, flexural and compression types (constant rate of traverse) Description. ISO 6133:1981, Rubber and plastics Analysis of multi-peak traces obtained in determinations of tear strength and adhesion strength. 3 Defin
22、ition For the purposes of this International Standard, the following definition applies. 3.1 adhesion strength the force per unit length required to cause a separation at the interface between the assembled components NOTE 1Any separation occurring at any other point, for example inside either compo
23、nent under test, is a failure of the component material, and does not indicate an adhesion strength. In such cases, the adhesion strength is greater than the strength of the weakest component involved. 4 Principle The stripping force required to separate two plies of fabric bonded with rubber, or a
24、rubber layer and a fabric ply bonded together, is measured under specified conditions using test pieces of standard dimensions in the form of a flat strip. 5 Apparatus 5.1 Test machine, power-driven and equipped with a suitable dynamometer; it shall be capable of maintaining a substantially constant
25、 rate of traverse of the moving head during the test and shall be fitted with an autographic recorder. An inertialess dynamometer (of electronic or optical type, for example) should preferably be used. The machine shall comply with the requirements of ISO 5893, be capable of measuring force with an
26、accuracy corresponding to grade B, as defined in ISO 5893, and have a rate of traverse of the moving grip of 50 mm/min 5 mm/min. The machine shall be fitted with grips capable of holding the test piece and the ply to be separated without slipping during the test. 5.2 Chart recorder, with a scale suf
27、ficiently large to permit easy interpretation of the trace. 6 Test piece 6.1 The test piece shall have a width of 25 mm 0,5 mm and shall be of sufficient length to permit ply separation during measurement over a length of at least 100 mm. The minimum thickness of the constituent components, or of on
28、e of them, shall be such that the weakest component can transmit the force necessary for separation without breaking. The thickness shall be suitably reduced (see ISO 4661-1), if necessary, in order to ensure that the line of separation of the plies during the test lies as close as possible to the p
29、lane of the strips of test piece held in the grips (see Figure 1). For tests intended to be comparable, the test pieces shall have the same dimensions. 6.2 Whenever possible, the standard test piece shall be cut from the article and prepared according to the relevant product standard, if one exists.
30、 7 Number of test pieces Unless otherwise specified, at least two test pieces shall be tested Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:57:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 36:1993(E) 2 BSI 03-1999 8 Time-interval between vulcanization a
31、nd testing Unless otherwise specified for technical reasons, the following requirements for time-intervals shall be observed. a) For all test purposes, the minimum time between vulcanization and testing shall be 16 h. b) For non-product tests, the maximum time between vulcanization and test shall be
32、 4 weeks, and for evaluations intended to be comparable, the tests shall be carried out, as far as possible, after the same time-interval. c) For product tests, whenever possible, the time between vulcanization and testing shall not exceed 3 months. In other cases, tests shall be made within 2 month
33、s of the date of receipt of the product by the customer. 9 Conditioning of test pieces and temperature of test Cut test pieces shall be conditioned, immediately before testing, for a minimum of 24 h at a standard temperature and standard relative humidity (see ISO 471). The test shall be carried out
34、 at the same temperature and relative humidity as used in the conditioning procedure. The same temperature and humidity shall be used throughout any one test or series of tests intended to be comparable. 10 Procedure Take the test piece as described in 6.1 and separate a ply of fabric or a rubber la
35、yer by hand for a distance of approximately 50 mm. The use of a scalpel or similar implement may be necessary to initiate the separation. Fix the separated ends of the test piece in the grips of the test machine (5.1), and adjust so that the tension is distributed uniformly and so that no twisting o
36、f the test piece will occur during the test. Place the body of the test piece in the non-driven grip and the ply to be separated in the power-driven grip so that the angle of separation is approximately 180. It is important to ensure that the strips of test piece held in the grips lie in the same pl
37、ane. Start the machine and continue the ply separation whilst recording on the chart recorder (5.2) the force over a length of separation of at least 100 mm. The rate of travel of the power-driven grip shall be 50 mm/min 5 mm/min. Examine the separated pieces for separation or failure. 11 Expression
38、 of results 11.1 Calculate the adhesion strength of the test piece by dividing the median peak force, determined in accordance with ISO 6133 using method A, B or C as appropriate to the trace, by the width of the test piece. Report the result as the average of the individual values obtained for the
39、duplicate test pieces, expressed in newtons per millimetre. 11.2 Describe the type of failure or separation using the following terminology: a) R indicates that the failure is in the rubber layer; b) RA indicates that the separation is between the rubber layer and the adhesive; c) AT indicates that
40、the separation is between the adhesive and the fabric; d) RB indicates that the failure is in the rubber bond between two fabric plies; e) T indicates that the failure is in the fabric; f) RT indicates that the separation is between the rubber and the textile when no adhesive is present. 12 Test rep
41、ort The test report shall include the following particulars: a) a reference to this International Standard; b) all details necessary for the identification of the sample; c) the type of test piece used, and the test piece dimensions; d) the rate of ply separation; e) the temperature and relative hum
42、idity of the test; f) the nature of the interface between the assembled components, and the calculated adhesion strength; g) the method of calculation, i.e. A, B or C. h) the type of failure or separation as described in 11.2; i) the date of testing. Licensed Copy: London South Bank University, Lond
43、on South Bank University, Fri Dec 08 04:57:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 36:1993(E) BSI 03-19993 Figure 1 Position of line of separation of plies Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:57:22 GMT+00:00 2006, Uncontrolled Copy, (c)
44、BSI 4 blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:57:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A12:1995 BSI 03-1999 List of references See national foreword. Licensed Copy: London South Bank University, London South Bank University, Fri D
45、ec 08 04:57:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 903-A12: 1995 ISO 36:1993 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at th
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