《BS 5131-1.9-1985 鞋靴和鞋靴材料试验方法.第1部分胶粘剂.第9节原始胶粘结合强度测量1.pdf》由会员分享，可在线阅读，更多相关《BS 5131-1.9-1985 鞋靴和鞋靴材料试验方法.第1部分胶粘剂.第9节原始胶粘结合强度测量1.pdf（10页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS 5131-1.9: 1985 Methods of Test for footwear and footwear materials Part 1: Adhesives Section 1.9 Measurement of green strength of adhesive joints NOTEIt is recommended that this Section should be read in conjunction with the information in the General introduction to BS 5131, pub
2、lished separately. UDC 685.31:620.1:665.93:539.219.2 BS 5131-1.9:1985 This British Standard, having been prepared under the direction of the Textiles and Clothing Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 May 1985 BSI 11-1999 The following
3、 BSI references relate to the work on this standard: Committee reference TCM/39 Draft for comment 82/36116DC ISBN 0 580 14211 6 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. Complia
4、nce 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 and ii, pages 1 to 4 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorpo
5、rated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.Date of issueComments BS 5131-1.9:1985 BSI 11-1999i Contents Page 1Scope1 2References1 3Principle1 4Apparatus1 5Test assemblies1 6Test procedure2 7Calculation and expression of
6、 results2 8Test report3 Figure 1 Plan of rectangle for mechanical preparation3 Figure 2 Cutting of adherends4 Figure 3 Force/extension graph4 ii blank BS 5131-1.9:1985 BSI 11-19991 1 Scope This Section describes a method for measuring the resistance to peeling of an adhesive joint between two sheet
7、materials immediately after it is made. This is usually known as the green strength. The main purpose of the test is to enable the green strength of joints made with various solvent-based adhesives between specific soling and upper materials to be compared. The test can also be used for joints betwe
8、en other materials provided that at least one of them is flexible. NOTEAdequate green strength is especially important for sole-attaching adhesives during shoe manufacture, as otherwise the sole bond may partially fail cohesively, i.e. within the adhesive film, after leaving the press. 2 References
9、This section refers to the following publications: BS 903, Methods of testing vulcanized rubber Part A26 Determination of hardness. BS 5131, Methods of test for footwear and footwear materials Subsection 1.1.2 Resistance to peeling Subsection 1.1.3 Preparation of test assemblies for adhesion tests.
10、3 Principle The two adherends of a bonded assembly are peeled apart immediately after bonding by forces acting at an angle of 180p. The peel angle depends on the flexibility of the adherend materials. The peeling force is recorded continuously and the average value 60 s after application of full bon
11、ding pressure is calculated from the graph. 4 Apparatus 4.1 A tensile testing machine, as described in BS 5131-1.1.2. 4.2 A conditioning cabinet or room, as described in BS 5131-1.1.2. 5 Test assemblies 5.1 Choice of adherends 5.1.1 Select the adherends for the test assemblies according to the type
12、of adhesive, as follows. a) Polyurethane adhesives. Use polyvinyl chloride (PVC)-coated fabric as upper material bonded to resin rubber as soling material. b) Polychloroprene adhesives. Use upper leather as upper material bonded to resin rubber as soling material. c) Other adhesives. Use adherend ma
13、terials for which the adhesive is intended. 5.1.2 The types of adherend required in 5.1.1 a) and b) shall be as follows. a) PVC-coated upper material, smooth, solid (i.e. non-cellular) PVC-coated woven cotton fabric of overall thickness 1.1 o 0.2 mm. b) Upper leather, either a pre-buffed, full chrom
14、e, pearl split, upper leather of thickness 1.5 o 0.2 mm, or a chrome grain side leather of thickness about 2.0 mm which will be reduced to a thickness of about 1.5 mm when its grain layer is removed during the preparation of the test joints. c) Resin rubber soling material, compounded resin rubber,
15、hardness 95o2 IRHD (determined as described in BS 903-A26), thickness 3.5 o 0.5 mm. NOTEIn certain circumstances, e.g. where particular factory practices are to be simulated, or when adhesion to the adherends listed in 5.1.2 is difficult, other materials of the same type, or different types, may be
16、used. 5.2 Conditioning Before preparation keep all adherends for at least 24 h in an atmosphere of 20 o 2 pC and 65 o 2 % relative humidity, and maintain them under these conditions between preparation, adhesive application and bonding. 5.3 Number of test assemblies Prepare four test assemblies from
17、 adherends which are the exact width required for a single test joint, using the procedures described in 5.4, 5.5, 5.6 and 5.7. NOTEThese assemblies will therefore differ from those prepared for the peel test, described in BS 5131-1.1.2, which requires assemblies to be the width of two test joints p
18、lus margins. This is because the joints for measuring green strength are tested immediately after bonding and there is not time to cut them from larger assemblies. Cutting of a “green” assembly would in any case disturb the bond. 5.4 Cutting and preparation of adherend materials For materials that w
19、ill not be prepared mechanically, cut two rectangles each approximately 70 mm I 50 mm. Of the materials listed in 5.1, these will be as follows. a) PVC-coated fabric, which is solvent wiped. b) Pearl split upper leather, which normally requires no further preparation. NOTEIf variability of results i
20、s suspected due to the pearl split leather, repeat the test ensuring that the pearl split is scoured or wire brush roughed before applying adhesive. c) Resin rubber, which is normally treated with a primer when a polyurethane adhesive is to be tested. BS 5131-1.9:1985 2 BSI 11-1999 For materials tha
21、t will be prepared mechanically, cut one rectangle approximately 70 mm I 100 mm. Of the materials listed in 5.1, these will be as follows. a) Grain side upper leather, which needs to have the grain removed by wire brush roughing or scouring. b) Resin rubber, which is normally prepared by scouring or
22、 wire brush roughing when a polychloroprene adhesive is to be tested. Use the procedures described in 4.2.1 to 4.2.7 of BS 5131-1.1.3:1976 to prepare materials prior to adhesive application. Follow the procedure for peel testing, 4.2.1.3 in those instances where this differs from the procedure for c
23、reep testing, 4.2.1.2. After preparation, cut each 70 mm I 100 mm rectangle into two 70 mm I 50 mm rectangles, as shown in Figure 1. 5.5 Preparation and application of adhesive Use the procedure described in 5.1 to 5.4 of BS 5131-1.1.3:1976. NOTEThe materials are usually adhesive coated before being
24、 cut into the adherend rectangles needed for the individual test joints (see 5.7). If more convenient, the adherends may be cut to size before adhesive coating, but after surface preparation. 5.6 Open times and drying conditions “Open time” is the time between applying the adhesive and assembling th
25、e joint. Where factory conditions are to be simulated, adopt the open times and the drying conditions used in practice. For evaluating or comparing adhesives where factory conditions are not known, adopt open times of 60 o 5 min on the upper and 20 o 4 h on the sole, drying at ambient temperature. N
26、OTEThe green strength of the bond varies more with the open time used than does the final bond strength. Consequently when measuring green strength it is necessary to specify tighter tolerances for the open time than are needed for the measurement of the final bond strength. 5.7 Cutting of adhesive
27、coated adherends When the adhesive is adequately dry but before the open time has elapsed, cut each of the two upper and two sole material 70 mm I 50 mm rectangles into two rectangles 30 o 1 mm wide by not less than 50 mm long, discarding the two marginal strips as shown in Figure 2. Use a press kni
28、fe, a sharp hand knife, or a rotary disc cutter. 6 Test procedure Adjust the tensile testing machine to a suitable force range, e.g. 0 to 200 N, and a jaw separation rate of 100 o 20 mm/min. Set the jaw separation to a distance that will allow the test joint to be clamped and put under tension with
29、the minimum delay once the machine is set in motion. At the conclusion of the open time, bond one pair of sole and upper adherend rectangles to form a joint using the procedures for adhesive reactivation and bonding described in 6.1 of BS 5131-1.1.3:1976. Since the activation conditions can affect t
30、he green strength it is important to use appropriate ones, i.e. either those being used in the factory or the standard conditions described in 6.1 of BS 5131-1.1.3:1976. When full pressure has been reached, bond at this pressure for 15 o 2 s and continue timing. After the 15 s bonding period, remove
31、 the joint from the press and immediately clamp its free legs in the jaws of the tensile testing machine. Set the machine in motion so that the time from application of full bonding pressure to the commencement of peel separation of the adherends is 35 o 5 s. During peeling, mark the force/extension
32、 graph at the point corresponding to 60 o 2 s from the application of full bonding pressure. Examine the test joint after peeling and determine the type of failure as described in 7.1 of BS 5131-1.1.2:1976. NOTEThe failure will often be cohesive, i.e. within the adhesive film. Repeat the procedure f
33、or the other three pairs of adherend rectangles. 7 Calculation and expression of results 7.1 For each of the four test joints make an estimate of the peeling force at the 60 s mark on the force/extension graph. If necessary smooth out the undulations in the trace by drawing an estimate line for the
34、peeling force trend in the 60 s region (see Figure 3). 7.2 Calculate the arithmetic mean of the four peeling forces and divide this by the width of the test joint to express the result in N/mm. Record this as the green strength of the bonded assembly. BS 5131-1.9:1985 BSI 11-19993 8 Test report Incl
35、ude the following items in the test report: a) the green strength expressed in accordance with clause 7; b) types of failure observed and the percentage of the total peeled area that each failure type represents; c) description of the adherends and their method of preparation; d) the type of adhesiv
36、e, method of application and number of coats applied; e) adhesive drying conditions and open time; f) details of activation of adhesive; g) reference to the method of test, i.e. BS 5131-1.9; h) date of testing. NOTEThe shaded area shows the subsequent position of the paper or tape insert in the test
37、 joints (see 5.5). Figure 1 Plan of rectangle for mechanical preparation BS 5131-1.9:1985 4 BSI 11-1999 Figure 2 Cutting of adherends Figure 3 Force/extension graph blank BS 5131-1.9: 1985 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body
38、 responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest
39、 amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can
40、 be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards p
41、ublications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standa
42、rds BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information
43、Centre. Tel: 020 8996 7111. Fax: 020 8996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: 020 8996 7002. Fax: 020 899
44、6 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or
45、transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070.