1、BRITISH STANDARD AEROSPACE SERIES CONFIRMED MAY1998 BS4J11:1991 (Superseding BS3J11) Incorporating Amendment No.1 Specification for Pressure-sensitive adhesive paper masking tapeBS4J11:1991 This BritishStandard, having been prepared under the directionof the Aerospace Standards Policy Committee, was
2、published under the authorityof the Board of BSI andcomes into effect on 28February1991 BSI02-2000 The following BSI references relate to the work on this standard: Committee reference ACE/40 Draft for comment89/70678 DC ISBN 0 580 18434 X Committees responsible for this BritishStandard The preparat
3、ion of this BritishStandard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/40, upon which the following bodies were represented: Adhesive Tape Manufacturers Association British Aerospace plc Ministry of Defence Amendments issued since publication Amd. No
4、. Date of issue Comments 8217 July1994 Indicated by a sideline in the marginBS4J11:1991 BSI 02-2000 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Construction 1 3 Dimensions 1 4 Freedom from defects 1 5 Samples for testing 1 6 Breaking strength and elongation at b
5、reak 1 7 Adhesive strength to steel 1 8 Freedom from deleterious effect on polymethyl methacrylate (PMMA) sheet 1 9 Resistance to penetration by paint solvents 1 10 Resistance to adhesive transfer by paint solvents 1 11 Packaging 2 12 Storage 2 13 Identification 2 14 Marking 2 Appendix A Information
6、 to be supplied by the purchaser 3 Appendix B Conditioning of test samples and test pieces 3 Appendix C Method for determination of breaking strength and elongation at break 3 Appendix D Method for determination of adhesive strength to steel 3 Appendix E Method of test for freedom from deleterious e
7、ffect on polymethyl methacrylate (PMMA) sheet 5 Appendix F Method of test for resistance to penetration by paint solvents 5 Appendix G Method of test for resistance to adhesive transfer by paint solvents 6 Figure 1 Steel test plate 6 Figure 2 Typical arrangement for stripping the tape from the plate
8、 7 Figure 3 Mandrel for tests for freedom from deleterious effect on polymethyl methacrylate sheet and for resistance to penetration by paint solvents 8 Publications referred to Inside back coverBS4J11:1991 ii BSI 02-2000 Foreword This BritishStandard prepared under the direction of the Aerospace St
9、andards Policy Committee, is one of a series for pressure-sensitive adhesive tapes of a quality suitable for aerospace purposes and is a revision of BS3J11 which is superseded and withdrawn. This revision includes guidance on information to be supplied by the purchaser, and deletes reference to a to
10、luene bath for cleaning samples. Alternative cleaning methods are specified. 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 conf
11、er immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to8, 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
12、the amendment table on the inside front cover.BS4J11:1991 BSI 02-2000 1 1 Scope This BritishStandard specifies requirements for pressure-sensitive adhesive paper masking tape for aerospace purposes, such as temporary masking during painting operations. NOTE 1The information to be supplied by the pur
13、chaser in the contract or order is listed in Appendix A. NOTE 2The titles of the publications referred to in this standard are listed on the inside back cover. NOTE 3The latest revision of an Aerospace Series standard is indicated by a prefix number. 2 Construction 2.1 The tape shall consist of a cr
14、epe paper base which has been treated to render it resistant to penetration by the solvents present in aircraft paints and dopes. The base shall be uniformly coated on one surface with a pressure-sensitive adhesive and the finished tape shall be free from ingredients which have a deleterious effect,
15、 e.g.crazing, on polymethyl methacrylate sheet. 2.2 The tape shall be supplied in roll form, with the adhesive side innermost, on a suitable core of the same width as the tape. 3 Dimensions The tolerances on the width of the finished tape shall be one of the following: a) 1.0mm for tapes up to and i
16、ncluding19mm; b) 1.5mm for tapes over19mm. NOTEThe length and width of the finished tape should be stated by the purchaser in the contract or order (see Appendix A). The finished tape is usually supplied in lengths of50m in one of the following widths: 1) 6mm; 2) 12mm; 3) 19mm; 4) 25mm; 5) 30mm; 6)
17、38mm; 7) 50mm. 4 Freedom from defects 4.1 When the tape is unrolled there shall be no tearing of the base material. 4.2 Each roll shall be reasonably free from substantial telescoping, gapping or other forms of distortion. When unrolled the tape shall show negligible transference of the adhesive to
18、the backing of the underlying turn. NOTECare should be taken not to unwind tapes rapidly at temperatures below10 C. 5 Samples for testing 5.1 The test samples shall be conditioned in accordance with Appendix B. 5.2 A batch of tape shall consist of a number of rolls designated as a batch by the manuf
19、acturer and substantially uniform in quality. 5.3 From each batch at least one roll shall be examined for compliance with clauses2 to4 inclusive, and tested for compliance with clauses6 to10 inclusive. 6 Breaking strength and elongation at break When determined in accordance with Appendix C, the bre
20、aking strength of the tape shall be not less than24N per10mm width and the elongation at break shall be not less than7% and not more than20%. 7 Adhesive strength to steel When determined in accordance with Appendix D, the adhesive strength of the tape shall be not less than1.6N per10mm width. The ta
21、pe shall separate from the plate without visible off-setting of the adhesive. 8 Freedom from deleterious effect on polymethyl methacrylate (PMMA) sheet When the tape is tested in accordance with Appendix E, there shall be no signs of crazing or other deleterious action on the PMMA strip and the stri
22、p shall be substantially free from transferred adhesive. 9 Resistance to penetration by paint solvents When the tape is tested in accordance with Appendix F, there shall be no signs of crazing or other deleterious action on the PMMA strip and the tape shall separate from it without transfer of adhes
23、ive. 10 Resistance to adhesive transfer by paint solvents When the tape is tested in accordance with Appendix G, it shall separate from the glass plate without transfer of adhesive.BS4J11:1991 2 BSI 02-2000 11 Packaging The rolls of tape shall be packed in such a manner that: a) they are protected f
24、rom moisture, dust and sunlight; b) they can be easily separated; c) they are reasonably protected from damage in normal transit conditions; d) they are all packed flat on their cut edges. 12 Storage When stored flat on their cut edges, in the original unopened packing, at temperatures between10 C a
25、nd30 C and between45% r.h. and75% r.h., the rolls of tapes shall still comply with this BritishStandard after a period of12 months. NOTEHigher temperatures and more humid conditions accelerate deterioration of the tape. It is recommended that stored material is used in the chronological order in whi
26、ch it is received. 13 Identification The tape shall be identified by the number of this BritishStandard, together with the width required. For example,25mm wide tape shall be identified as “BS4J11/25mm”. NOTEThe number of this BritishStandard together with the width required, should be stated by the
27、 purchaser in the contract or order (see Appendix A). 14 Marking 14.1 All markings shall be neat and indelible. Each transit carton within a complete package shall be marked with at least the following: a) the batch identification code number; b) a brief description and the number of this BritishSta
28、ndard, i.e.Masking tape: BS4J11 1) ; c) the width of the tape; d) the length of a coil; e) the quantity of contents; f) the contractors initials or recognized trade marks; g) the words, “THIS SIDE UP”, and/or a suitable pictogram to ensure that packages are properly stacked in store. 14.2 If a trans
29、it carton within a complete package is to be marked with additional information it shall be as follows: a) the date of manufacture, i.e.the month and year; b) the date of despatch; c) the contract or order number; NOTE 1The purchaser may request additional markings. NOTE 2The request for any additio
30、nal markings should be stated in the contract or order (see Appendix A). 1) Marking BS4J11 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
31、 claim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS4J11:1991 BSI 02-2000 3 Appendix A Information to be supplied by the purchaser The following information
32、should be stated by the purchaser in the contract or order: a) the number of this BritishStandard, i.e.BS4J11 (see clause13); b) the length required (see clause3); c) the width required (see clauses3 and13); d) whether any additional markings are required (see note to14.2). Appendix B Conditioning o
33、f test samples and test pieces B.1 Immediately before pieces for testing are taken, condition each sample roll for at least24h at23 2 C and50 5% r.h. Remove and discard the three outer turns before cutting the test pieces from the conditioned roll. B.2 Condition all individual test pieces in accorda
34、nce with the relevant appendix and test preferably in the same atmosphere. If testing is not conducted in the same atmosphere, commence the test within3min of removal of each test specimen from the atmosphere described in B.1. B.3 A suitable chamber and the methods of obtaining the required conditio
35、ning atmosphere are given in BS3718. Appendix C Method for determination of breaking strength and elongation at break C.1 Apparatus C.1.1 Power driven tensile testing machine, equipped with a continuous indicating device calibrated at intervals of0.2N or less and with arate of movement of the driven
36、 jaw of300 30mm/min. In case of dispute, a low inertia type of machine shall be used. C.2 Preconditioning Condition the sample roll in accordance with B.1. C.3 Test pieces Take three strips of tape, each of sufficient length to give an initial test length of200mm from the sample roll at intervals of
37、 not less than300mm. C.4 Conditioning Condition the test pieces by freely suspending them at23 2 C and50 5% r.h. for at least2h immediately before testing. C.5 Procedure Insert the test piece into the grips or jaws of the machine so that the load is applied evenly across the width and the initial te
38、st length is200mm. Elongate the test piece until it breaks and record the maximum force during the test and the increase in distance between the grips or jaws at the moment of break. Make three valid determinations, disregarding any test in which the break occurs within5mm of either grip or jaw. Ens
39、ure that during the test the tape does not slip in the grips or jaws of the testing machine. C.6 Results C.6.1 Breaking strength From the central value of the three recorded maximum forces, calculate and report the breaking strength in newtons per10mm width. C.6.2 Elongation at break From the centra
40、l value of the three recorded increases in distance between the grips or jaws at the moment of break, calculate and report the elongation at break as a percentage of the original distance between the grips or Jaws. Appendix D Method for determination of adhesive strength to steel D.1 Solvents D.1.1
41、Solvents, one of the following solvents is required: a) methanol; b) butanone (ethyl methyl ketone); c) acetone; d) sulphur free toluene. NOTEAll the above solvents should be of general purpose chemical grade. D.2 Apparatus D.2.1 Five rectangular test plates of stainless steel, within the following
42、compositional limits. A convenient size of plate is200mm 50mm; the thickness shall be not less than2mm. The plate is marked at equidistant intervals of12.5mm, along both of the longer edges, the first mark being made at50mm from end A (see Figure 1). The central40mm of the test plate width shall be
43、free from marks. a) carbon 0.16%max.; b) silicon 0.20%min.; c) manganese 2.00%max.; d) nickel 8% to14%; e) chromium 11% to19%.BS4J11:1991 4 BSI 02-2000 The test surface of the plate shall be polished to give an abrasive satin finish(180 grit), the direction of gritting being parallel to the longer s
44、ide of the plate. The surface roughness shall be determined from the mean line of the profile in accordance with BS1134-1 and shall comply with the following. 0.054mR a 0.404m R max 34m where D.2.2 Solid brass roller,80mm in diameter and44mm in width, covered with rubber approximately6mm thick havin
45、g an IRHD (International Rubber Hardness Degree) of60 5; the mass of the roller shall be approximately2kg. D.2.3 Power driven tensile testing machine, as described in C.1.1, but with the back stop or ratchet pawl removed in the case of a pendulum test machine. D.2.4 Cleaning materials. D.2.4.1 4-hyd
46、roxy-4-methylpentan-2-one (diacetonealcohol). D.2.4.2 Pharmaceutical quality, lint free cotton wool or Paper tissue. D.3 Preconditioning Condition the sample roll in accordance with B.1. D.4 Test pieces Take five strips of tape450mm long, unwound radially from the roll at intervals of300mm at a rate
47、 of approximately300mm/s. Avoid contamination of the adhesive surface and do not allow it to touch the fingers. If the tape is wider than38mm, cut a test piece25mm wide from it, using a sharp tool to produce clean cut edges. If the tape is38mm wide or less, use the tape in the width received. D.5 Pr
48、ocedure D.5.1 General Test each strip on a separate plate as described inD.5.2, D.5.3 and D.5.4. D.5.2 Cleaning of the plate Wipe the test surface of the plate with a fresh pieceof lint free cotton wool saturated with4-hydroxy-4-methylpentan-2-one (diacetonealcohol). Dry the plate with fresh cotton
49、wool, then wipe the test surface with a fresh piece of cotton wool saturated with one of the solvents listed inD.1. Dry the plate with fresh cotton wool, then repeat for a total of three cleaning operations with this solvent. Maintain the plate at a temperature of23 2 C for at least5min before proceeding with the adhesion test procedure. NOTE 1Paper tissue may be substituted for cotton wool. NOTE 2Cleaning should be carried out in an area with good fume extraction. D.5.3 Application of test piece Apply the test piece as follows. a) Place the plate, w
