1、BRITISH STANDARD BS7116:1990 Specification for Double sided pressure sensitive adhesive tapesBS7116:1990 This British Standard, having been prepared under the directionof the Packaging and Freight Containers Standards Policy Committee, was publishedunder the authority ofthe Board of BSI and comes in
2、toeffect on 31 May1990 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference PKM/572 Draft for comment88/39445 DC ISBN 0 580 17747 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Packaging an
3、d Freight Containers Standards Policy Committee (PKM/-) to Technical Committee PKM/572 upon which the following bodies were represented: Adhesive Tape Manufacturers Association British Fibreboard Packaging Association British Footwear Manufacturers Association British Paper and Board Industry Federa
4、tion British Plastics Federation British Ports Association and the National Association of Ports Employers British Steel Industry British Steel Industry (Wire Section) British Telecommunications plc British Tensional Strapping Association Cordage Manufacturers Institute Department of Trade and Indus
5、try Food and Drink Federation Her Majestys Stationery Office Ministry of Defence Pressure Sensitive Manufacturers Association Packaging and Industrial Films Association Pira (the Research Association for the Paper and Board, Printing and Packaging Industries) Post Office Soap and Detergent Industry
6、Association Timber Packaging and Pallet Confederation Amendments issued since publication Amd. No. Date of issue CommentsBS7116:1990 BSI 08-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Classification 2 4 Dimensions 3 5 Peel adhesion 3 6 Freed
7、om from defects 3 7 Release liner 3 8 Packing 4 9 Marking 4 Appendix A List of double sided pressure sensitive adhesive tapes 5 Appendix B Determination of shear adhesion 5 Appendix C Determination of thickness 8 Appendix D Determination of peel adhesion 9 Appendix E Determination of liner release 1
8、2 Appendix F Determination of breaking strength and elongation at break 15 Appendix G Determination of loop tack 16 Appendix H Determination of dynamic tensile adhesion strength (T-block) 17 Appendix J Determination of resistance to static shear 18 Appendix K Determination of resistance to dynamic s
9、hear (solid tapes) 20 Appendix L Determination of resistance to dynamic shear (foam tapes) 21 Appendix M Storage 23 Figure 1 Details of shear adhesion test 7 Figure 2 Test jig for 90 peel adhesion 9 Figure 3 Steel plate for adhesion test 12 Figure 4 Typical arrangement for stripping tape from the pl
10、ate 13 Figure 5 Attachment of tape to plate (open side in contact) 13 Figure 6 Illustration of test jig and test piece attachment to tester 14 Figure 7 Attachment of tape to plate 15 Figure 8 Test jig for loop tack test 16 Figure 9 General arrangements of test plates 19 Figure 10 Details of static s
11、hear test 20 Figure 11 Preparation for open side adhesive test 23 Figure 12 Preparation for closed side adhesive test 23 Table 1 Classification 3 Table 2 List of double sided pressure sensitive tapes 5 Publications referred to Inside back coverBS7116:1990 ii BSI 08-1999 Foreword This British Standar
12、d has been prepared at the request of the Adhesive Tape Manufacturers Association and the Pressure Sensitive Manufacturers Association under the direction of the Packaging and Freight Containers Standards Policy Committee. This British Standard calls for the use of substances and/or procedures that
13、may be injurious to health if adequate precautions are 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. A British Standard does not purport to include all the necessary provisions of a contract. Users
14、of British Standards are responsible for their correct application. Compliance 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, pagesi andii, pages1 to24, an inside back cover and a back
15、cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS7116:1990 BSI 08-1999 1 1 Scope This British Standard specifies requirements for classification, dimensions, shear adhesion,
16、thickness, peel adhesion and packaging of rolls of double sided pressure sensitive adhesive and transfer tapes used in permanent mounting, sealing, floor covering laying, joining and similar applications. This standard does not specify the colour of tapes. Appendix A lists the types of tapes general
17、ly available. Appendix B, Appendix C and Appendix D describe methods for determination of shear adhesion, thickness and peel adhesion respectively. Recommendations for the determination of liner release, breaking strength and elongation at break, loop tack, dynamic tensile adhesion strength (T-block
18、), static shear resistance, dynamic shear resistance of solid tapes and dynamic shear resistance of foam tapes are given in Appendix E to Appendix L respectively. These properties may be agreed between manufacturer and purchaser. Information on storage is given in Appendix M., NOTE 1Although this Br
19、itish Standard specifies requirements for tapes for permanent applications, the test methods may also be suitable for tapes for non-permanent applications. NOTE 2The titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Br
20、itish Standard the following definitions apply. 2.1 pressure sensitive adhesive a type of adhesive which in its dry solvent free form is permanently tacky at room temperature and, when applied to a variety of surfaces, forms an immediate bond NOTEThe bond strength may be increased by pressure and/or
21、 time. 2.2 open side (adhesive) that surface of the adhesive which is exposed on normal unwinding or separation 2.3 closed side (adhesive) that surface of the adhesive which normally remains in contact with the release liner, on unwinding 2.4 blocking an undesired adhesion between touching layers of
22、 material 2.5 carrier (double sided tapes only) the base material on to both faces of which a pressure sensitive adhesive is applied, to produce a double sided tape NOTEThe terms carrier and backing are frequently used incorrectly. The term backing is used for single sided tape. 2.6 conditioning the
23、 process of subjecting material to specific temperatures and relative humidity conditions for a stipulated period of time 2.7 double sided a tape which has two available pressure sensitive adhesive coated surfaces 2.8 legging the occurrence on separation of strings or filaments of adhesive between t
24、he adhesive layer and the substrate to which it has been applied or its release liner 2.9 pre-release the unwanted separation of a tape from its release liner during unwinding 2.10 release liner a removable material which protects the adhesive face or faces 2.11 open side (release liner) that surfac
25、e of the release liner which is exposed on normal unwinding or separation 2.12 closed side (release liner) that surface of the release liner which normally remains in contact with the adhesive on unwinding 2.13 substrate the surface to which a pressure sensitive tape is applied 2.14 tack the propert
26、y of a pressure sensitive adhesive that causes a bond, with a measurable separation force, the instant the adhesive touches the substrate and without externally applied pressureBS7116:1990 2 BSI 08-1999 2.15 key the bond between the adhesive and the carrier 2.16 double coated a carrier with adhesive
27、 on both sides with a release liner on one or both sides to prevent the adhesive sticking face to face 2.17 adhesion the state in which two surfaces are held together by interfacial forces 2.18 shear adhesion the ability to resist forces applied in the same plane as the tape 2.19 peel adhesion the f
28、orce required to peel a strip of tape from a substrate at a specified angle and speed 2.20 permanent (adhesive) an adhesive that has been designed to remain permanently in position under the specified service conditions 2.21 removable (adhesive) an adhesive that has been designed to allow subsequent
29、 removal, without damaging or contaminating the substrate under the specified service conditions 2.22 pressure sensitive adhesive tape a category of tape coated on one or both faces with a pressure sensitive adhesives which is permanently tacky at room temperature, and requires no activation by wate
30、r, solvent or heat to adhere to a variety of dissimilar surfaces upon contact NOTE 1In some cases the adhesive may be further cured by heating after application. NOTE 2The bond strength may be increased by pressure and/or time. 2.23 transfer tape a tape having two available pressure sensitive adhesi
31、ve surfaces without the need of a carrier and which may or may not have reinforcing fibres in it and with a release liner separating the adhesive surfaces 2.24 modes of failure 2.24.1 adhesive failure failure of an adhesive bond such that the separation is at the interface of adhesive and substrate
32、leaving no apparent residues 2.24.2 cohesive failure failure of an adhesive bond such that the separation is within the adhesive 2.24.3 delamination splitting of the carrier or release liner of a tape into distinct layers 2.24.4 key failure failure of the bond such that separation is at the interfac
33、e of adhesive and carrier 3 Classification 3.1 General The tapes are classified by carrier (or base material), maximum service temperature of the substrate and the adhesive type. NOTEThe type of adhesive used on a tape can significantly affect its adhesion properties, particularly at elevated temper
34、atures. Typical pressure sensitive adhesives employed in the manufacture of double sided tapes include: a) natural or synthetic rubber based adhesives; b) polyacrylate based adhesives; c) silicone compound based adhesives. Adhesion to any particular surface can be significantly influenced by the cho
35、ice of adhesive in use. Additionally adhesives may be classified as either thermoplastic or thermosetting adhesives. A thermoplastic adhesive softens on heating and reverts to its original state on cooling. Such an adhesive could have a poor temperature range dependent on the softening temperature o
36、f the adhesive. A thermosetting adhesive softens on initial heating but becomes firmer after further heating and remains so on cooling. It does not soften appreciably on subsequent reheating. The combinations available are considerable and advice on product suitability should be sought from the manu
37、facturer. 3.2 Carrier The carrier (base material) shall be solid or foamed (seeAppendix A). NOTEIn the case of transfer tapes the adhesive may be reinforced with suitable fibres, for example, glass or polyester. 3.3 Maximum service temperature The maximum service temperature of the tape system is ba
38、sed on the shear adhesion test (see Appendix B). The maximum service temperature cannot exceed the maximum service temperature of the carrier as listed in Appendix A.BS7116:1990 BSI 08-1999 3 When tested in accordance with Appendix B, the tape shall support a minimum load of0.25kg for4h at23 C and f
39、rom the maximum load held with a slippage of not more than2.5mm after4h at each of the six test temperatures, the tape shall be classified by the numerical code obtained using Table 1. Table 1 Classification The digit corresponding to the maximum load supported at each test temperature with not grea
40、ter than2.5mm slippage after4h shall be written in increasing temperature sequence to produce classifications such as those below. Example 1 Example 2 Example 3 Example 3 Thus the higher the numerical classification(444444max.) the better the overall shear adhesion of the tape at elevated temperatur
41、es. 4 Dimensions NOTE 1Preferred tape widths are6,9,12,15,19,22,25,30,38 and50mm. Other widths may be available. NOTE 2Preferred tape lengths are10,20,25,33,50,55 and66m, or multiples of50m or66m. Other lengths may be available. 4.1 Core diameter The nominal internal diameters of the cores on which
42、tape is wound shall be26mm or38mm or76mm. 4.2 Tolerance on width The tolerance on widths shall be 1.0mm for widths up to and including19mm and 1.5mm for widths greater than19mm. NOTEThe width of the tape should be measured on the roll by means of a steel rule, or other suitable device, graduated in0
43、.5mm divisions. 4.3 Roll length The actual length of a roll shall be not less than the stated length. 4.4 Thickness 4.4.1 Solid and transfer tapes. The thickness of the tape, measured in accordance withC.2, shall be within 15% of the nominal value unless the combination of carrier and adhesive tape
44、makes this impossible. 4.4.2 Foamed tapes. The thickness of the tape, measured in accordance withC.3, shall be within 25% of the nominal value unless the combination of carrier and adhesive tape makes this impossible. 5 Peel adhesion When tested in accordance with Appendix D, the minimum adhesion to
45、 steel of each side of a permanent tape shall be not less than2N per10mm width. 6 Freedom from defects When the tape is unrolled there shall be no tearing of the carrier and liner. NOTEEach roll should be reasonably free from telescoping, gapping or other forms of distortion. When unrolled the tape
46、should show negligible transference of adhesive to the interleaving. 7 Release liner The rolls of tape shall be wound with a release liner which shall be made of plain or embossed plastics material, or double sided release paper interleaved between each successive turn of tape on the reel. The relea
47、se liner shall be easily and cleanly removed without tearing, delamination or transference of adhesive. Test load (kg) Test temperature ( C) 23 60 90 120 150 180 2.0 1.0 0.5 0.25 4 3 2 1 4 3 2 1 4 3 2 1 4 3 2 1 4 3 2 1 4 3 2 1 444331 This tape will hold a minimum of2.0kg at23,60 and90 C, a minimum o
48、f1.0kg at120 and150 C and a minimum of0.25kg at180 C. 44433 This tape will hold a minimum of2.0kg at23,60 and90 C and a minimum of1.0kg at120 and150 C. The tape fails to hold0.25kg at180 C, hence there is no sixth digit. 31 This tape will hold a minimum of1.0kg at23 C and0.25kg at60 C. The tape fail
49、s at other temperatures and masses and hence is classified by only two digits. 4 This tape will hold a minimum of2.0kg at23 C but fails at other temperatures and masses. It is suitable for room temperature (or below) applications only.BS7116:1990 4 BSI 08-1999 8 Packing The individual rolls of tape shall be bulk packed in such a manner that: a) they are protected from dust and light; b) they can be easily separated; c) they are adequately protected from damage during normal transit conditions; d) the cut edges of the rolls
