BS ISO 15509-2001 Adhesives - Determination of the bond strength of engineering-plastic joints《粘合剂 工程塑料接头粘合强度测定》.pdf

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1、BRITISH STANDARD BS ISO 15509:2001 Adhesives Determination of the bond strength of engineering-plastic joints ICS 83.180 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS ISO 15509:2001 This British Standard, having been prepared under the direction of the Sector Policy and St

2、rategy Committee for Materials and Chemicals, was published under the authority of the Standards Policy and Strategy Committee on 8 November 2001 BSI 8 November 2001 ISBN 0 580 38659 7 National foreword This British Standard reproduces verbatim ISO 15509:2001 and implements it as the UK national sta

3、ndard. The UK participation in its preparation was entrusted to Technical Committee PRI/52, Adhesives, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement internatio

4、nal or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include a

5、ll 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. aid enquirers to understand the text; present to the responsible international/European c

6、ommittee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages i

7、i to v, a blank page, pages 1 to 8, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsINTERNATIONAL STANDARD ISO 15509 First edition 2001-08-15 Reference numb

8、er ISO 15509:2001(E) Adhesives Determination of the bond strength of engineering-plastic joints Adhsifs Dtermination de la rsistance de joints colls des plastiques industrielsISO 15509:2001(E) iiISO 15509:2001(E) iii Contents Page 1 Scope . 1 2 Normative references . 1 3 Principle 1 4 Specimen 1 5 A

9、pparatus . 5 6 Procedure . 5 7 Expression of results 8 8 Precision . 8 9 Test report 8ISO 15509:2001(E) iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is no

10、rmally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in

11、 the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the tech

12、nical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of paten

13、t rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 15509 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products.ISO 15509:2001(E) v Introduction Methods of determining the strength of adhesive joints ar

14、e well known. Several International Standards describe various methods including the lap-shear test or the butt torsion test. However, these methods are either not suitable for the determination of values which can be used for design purposes, or are restricted to metallic substrates. Because the ex

15、isting International Standards for the measurement of the strength of bonded plastic materials are derived from test methods for metals and are less suitable for plastic materials due to the bending of substrates and varying modulus of elasticity, a new test method and a new test geometry have been

16、developed and are described in this International Standard.INTERNATIONAL STANDARD ISO 15509:2001(E) 1 Adhesives Determination of the bond strength of engineering- plastic joints 1 Scope This International Standard describes a test method for measuring the shear and/or tensile strength of an adhesive

17、ly bonded plastic/plastic specimen of a specific design. This method allows the determination of a combined shear and tensile behaviour of the bond. These shear and tensile values are useful for design purposes. 2 Normative references The following normative documents contain provisions which, throu

18、gh reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility

19、of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 291:1997, Plastics Standard atmospheres

20、 for conditioning and testing ISO 10365:1992, Adhesives Designation of main failure patterns ISO 13895:1996, Adhesives Guidelines for the surface preparation of plastics 3 Principle A hollow cylindrical test specimen of specific design is used for the determination of the shear and tensile strengths

21、 of adhesively bonded plastic/plastic joints. These values can be used in calculation programmes. The rotationally symmetrical specimen allows testing under tensile, torsional or combined tensile/torsional loads if a suitable test machine is used. NOTE 1 The shear stress is not uniformly distributed

22、 as the stress varies by approximately from the inner radius to the outer radius. Therefore the calculated shear strength represents an “average” value. NOTE 2 The origin of the stress distribution curve is the deformation of the bond line, as the deformation increases with increasing diameter. The

23、superimposition of shear and tensile stresses is negligible in the bondline of rotationally symmetrical specimen compared to lap-shear specimen as described in ISO 4587, Adhesives Determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies. There are practically no significant pe

24、aks in the stress distribution curve compared with the peaks observed in a lap-shear specimen, since the bond is continuous in the direction of the displacement. 4S p e c i m e n 4.1 Preparation 4.1.1 General Prepare the adherends by injection moulding as described in 4.1.2 to 4.1.5. 15 %ISO 15509:2

25、001(E) 2 4.1.2 Mould The mould used shall be of the ejector-pin type with a limitation of one moulding per shot. The mould cavity shall be filled through a cone gate. NOTE The use of this type of mould avoids weld lines which could lead to symmetry problems with the moulding after cooling, or to a w

26、eakening of the mechanical properties in this area. A schematic drawing of an injection-moulded adherend is shown in Figure 1. The mould shall be manufactured in accordance with conventional mould-making processes. It shall be of an adequate size so as to allow the preparation of adherends of the di

27、mensions shown in Figure 2 1) . 4.1.3 Injection-moulding parameters The parameters shall be agreed upon between the user and the plastic material supplier. NOTE 1 The injection-moulding parameters will depend on the geometry of the mould and the nature of the plastic material. Key 1 Base of adherend

28、 2S p r u e 3 Bonding areas 4 Degassing zone a Injection direction b Ejection direction Figure 1 Schematic drawing of one of the adherends after moulding 1) One possible supplier of such a mould is Rusko-Formen GmbH, Friedrich-List-Strae 10, D-73249 Wernau, Germany.ISO 15509:2001(E) 3 The plastic ma

29、terial shall be pre-dried. The temperature and time shall be as agreed upon between the user and the plastic material supplier. NOTE 2 Temperatures between and (depending on the type of plastic) over periods of to in a vacuum oven are the preferred conditions. 4.1.4 Removal of the sprue Remove the c

30、entral part, or sprue, from each of the adherends. A simple method consists of using a chisel while rotating the adherend in a lathe. Avoid any contact with the bonding area during this operation. 4.1.5 Geometry The specimen shall consist of two adherends bonded together. The dimensions of each adhe

31、rend shall be as given in Figure 2. 4.2 Surface preparation Prepare the bonding surfaces of the adherends in accordance with ISO 13895. NOTE Corona discharge at ambient pressure is the preferred method. Dimensions in millimetres Figure 2 Dimensions of adherend 100 C 150 C4 h 6 hISO 15509:2001(E) 4 4

32、.3 Assembly of the specimen in the mounting jig Assemble the specimen using the mounting jig shown in Figure 3. NOTE 1 The mounting jig allows a small amount of movement of the adherends. This compensates for deformations which are caused by the shrinkage or thermal expansion of the adhesive and the

33、 adherends during curing. Key 1 Baseplate 2 Guide pin 3 Fixation holding the adherend on the baseplate (three fixation points round the circumference, using springs exceeding a force higher than the weight of the adherend) 4 Metal sleeve 5 Screw for fixing spacers on the metal sleeve 6 Gap for adhes

34、ive bond 7 Adherend 8 Spacer used to define the bond gap thickness (three pairs of spacers round the circumference, manufactured from the same material as the adherends) 9 Adjustment screw (for adjusting bond gap) Figure 3 Schematic drawing of the specimen during the assembly processISO 15509:2001(E

35、) 5 The spacers shall be made of the same material as the adherends in order to eliminate differences in thermal expansion between the spacers and the adherends. The spacers shall be linked to the metal sleeves which shall be freely movable along the guide pins. The alignment of the adherends in the

36、 two halves of the mounting jig shall be ensured by a metal centering cone on each baseplate. Each cone shall be freely rotating and have a spring (strong enough to prevent the adherend sliding) which presses the adherend against the centering cone. When contact is established between the adherends

37、and the centering cones, fix the adherends in place at the fixation points. Assemble both baseplates (with the adherends but without adhesive) by introducing the guide pins into the sleeves and verify the gap between them (for the adhesive bond). The gap can be adjusted ba means of the adjustement s

38、crews. NOTE 2 The adjustment is usually made in order to achieve a bond thickness of . 4.4 Application of the adhesive Apply the adhesive using the application device as shown in Figure 4, as follows. Place a baseplate carrying one of the adherends under the dispenser. Adjust the dispenser so that t

39、he nozzle is located exactly above the application area. Apply the adhesive. NOTE An automated rotating device coupled with the dispenser has been shown to give good results. Assemble the two halves of the mounting jig and cure the adhesive in accordance with the manufacturers instructions. 4.5 Cond

40、itioning and testing atmosphere The specimens shall be conditioned and tested in one of the standard laboratory atmospheres specified in ISO 291. 5A p p a r a t u s 5.1 Test machine, equipped with a temperature-controlled enclosure for tests carried out at temperatures other than ambient. 5.2 Clampi

41、ng jig (see Figure 5), consisting of an adapter, and two jaws with hinge, screw and locknut. NOTE This special clamping jig allows easy and quick fixing of the specimen in the test machine. 6 Procedure Place the adapter and the specimen in the jaws. Secure them with the screws. Draw in the locknut t

42、o hold the specimen by its flange Insert the clamping jigs in the test machine, ensuring that no load is applied to the bonded joint. Apply a tensile force at a crosshead speed of and/or a torsional force at a speed of until the joint fails. Record the ultimate force reached during the test. Examine

43、 the surface of the bonded parts after failure, and record the failure pattern in accordance with ISO 10365. 0,1 mm 1 mm/min 5 /minISO 15509:2001(E) 6 Key 1 Dispenser 2 Dispenser nozzle 3 Adherend 4 Fixation holding the adherend on the baseplate 5 Centering cone 6 Baseplate 7 Rotating support Figure

44、 4 Application of the adhesiveISO 15509:2001(E) 7 Key 1 Adapter 2 Jaws (hinge, screw and locknut not shown) 3S p r i n g 4 Metal centering cone 5 Test specimen Figure 5 Schematic drawing of clamping jigISO 15509:2001(E) 8 7 Expression of results The bonded area corresponds to where is the outer diam

45、eter of the bonded area, expressed in millimetres (mm); is the inner diameter of the bonded area, expressed in millimetres (mm). Since and , the area is . The tensile strength, in pascals is given by the force at failure in newtons, divided by the bonded area, in square millimetres. The shear streng

46、th is given in megapascals by where is the moment at failure, expressed in megapascals (MPa). 8P r e c i s i o n The precision of this test method is not known because inter-laboratory data are not available. Inter-laboratory data are being obtained and a precision statement will be added at a subse

47、quent revision. 9 Test report The test report shall include the following information: a) a reference to this International Standard; b) all details necessary for complete identification of the adhesive tested, including type, source and manufacturers code number, batch or lot number, etc.; c) all d

48、etails necessary for complete identification of the adherends used, including details of preparation and moulding, the method of preparation of the surface prior to bonding, the conditions used to cure the adhesive and the atmosphere used to condition the specimens; d) the test conditions and test m

49、ode (tensile or torsional); e) the number of specimens tested; f) the shear and/or tensile strength of each specimen; g) the failure pattern of each specimen, in accordance with ISO 10365; h) the date of the testing. 4 d 2 1 d 2 2 d 1 d 2 d 1 = 24 mm d 2 = 20 mm 138 m 2 max max = M t 16 d 1 (d 4 1 d 4 2 ) M tBS ISO 15509:2001 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