1、BSI Standards PublicationBS EN 28510-1:2014Adhesives Peel test for aflexible-bonded-to-rigid testspecimen assemblyPart 1: 90 peelBS EN 28510-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 28510-1:2014.It supersedes BS EN 28510-1:1993 which is withdrawn.T
2、he UK participation in its preparation was entrusted to TechnicalCommittee PRI/52, Adhesives.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible
3、for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 82574 3ICS 83.180Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and
4、 Strategy Committee on 30 April 2014.Amendments issued since publicationDate Text affectedBS EN 28510-1:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 28510-1 April 2014 ICS 83.180 Supersedes EN 28510-1:1993English Version Adhesives - Peel test for a flexible-bonded-to-rigid test specimen
5、assembly - Part 1: 90 peel Adhsifs - Essai de pelage pour un assemblage coll flexible-sur-rigide - Partie 1: Pelage 90 Klebstoffe - Schlprfung fr flexibel/starr geklebte Proben -Teil 1: 90 Schlversuch This European Standard was approved by CEN on 9 February 2014. CEN members are bound to comply with
6、 the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Manage
7、ment Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same stat
8、us as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta
9、, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN
10、All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 28510-1:2014 EBS EN 28510-1:2014EN 28510-1:2014 (E) 2 Foreword This document (EN 28510-1:2014) has been prepared by Technical Committee CEN/TC 193 “Adhesives”, the secretariat of which is
11、 held by AENOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2014 and conflicting national standards shall be withdrawn at the latest by October 2014. Attention is drawn to the possibil
12、ity that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 28510-1:1993. No technical provisions have been amended in this edition, however the referen
13、ces have been updated. SAFETY STATEMENT Persons using this document should be familiar with the normal laboratory practice, if applicable. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropri
14、ate safety and health practices and to ensure compliance with any regulatory conditions. ENVIRONMENTAL STATEMENT It is understood that some of the material permitted in this standard may have negative environmental impact. As technological advantages lead to acceptable alternatives for these materia
15、ls, they will be eliminated from this standard to the extent possible. At the end of the test, the user of the standard should take care to carry out an appropriate disposal of the wastes, according to local regulation. According to the CEN-CENELEC Internal Regulations, the national standards organi
16、zations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, M
17、alta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 28510-1:2014EN 28510-1:2014 (E) 3 1 Scope This part of EN 28510 specifies a 90 peel test for the determination, under specified conditions, of the peel resistanc
18、e of a bonded assembly of two adherends where at least one adherend is flexible. If a normal tensile testing machine is used for the test, the peel angle will not be constant at exactly 90. If a constant angle of exactly 90 is required, a roller peeling device is used (see 4.1). The 90 peel test is
19、particularly suitable for use with less flexible adherends for which a 180 peel test is not suitable because the adherends crack, break or delaminate. A 180 peel test is described in EN ISO 8510-2. 2 Normative references The following documents, in whole or in part, are normatively referenced in thi
20、s document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13887, Structural Adhesives - Guidelines for surface preparation of metals and plas
21、tics prior to adhesive bonding EN ISO 291, Plastics - Standard atmospheres for conditioning and testing (ISO 291) ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement
22、 method 3 Principle A bonded assembly of two adherends is prepared using the adhesive under test. The adherends are then pulled apart at a substantially steady rate, starting at the open end of the bond, in such a way that separation occurs progressively along the length of the bonded adherends. The
23、 force is applied approximately normal to the plane of the bond, through the separated part of the flexible adherend. 4 Apparatus 4.1 Tensile testing machine (incorporating a roller peeling device if a constant peel angle of exactly 90 is required), capable of supplying a tensile force with a consta
24、nt rate of grip separation. The machine shall be equipped with a force-measuring system complete with an indicator and/or a recorder. The indicated force shall not differ from the true applied force by more than 2 %. The response time of the machine shall be short enough not to affect the accuracy w
25、ith which the force applied at the time of rupture can be measured. The force at rupture of the specimen shall lie in the range between 10 % and 80 % of the full-scale reading. 4.2 Grips, one of which shall be suitable for firmly clamping the rigid adherend (see 5.1.2), while the other shall be suit
26、able for holding the flexible adherend (see 5.1.3) as shown in Figure 1. The latter grip shall be self-aligning, so that the force will be exerted normal to the plane of the bond, and linked to the sensor of the tensile testing machine (4.1) by a wire of minimum length 600 mm. 5 Test specimens 5.1 A
27、dherends 5.1.1 General The adherends shall be thick enough to withstand the expected tensile force, and their dimensions shall be measured accurately and reported in full in the test report. BS EN 28510-1:2014EN 28510-1:2014 (E) 4 The recommended thicknesses of test specimens are: metals 1,5 mm; pla
28、stics 1,5 mm; wood 3 mm; compounded rubbers 2 mm. Other thicknesses agreed on between the purchaser and the supplier of the adhesive may be used. 5.1.2 Rigid adherend The surface to be bonded shall have a width of (25,0 0,5) mm and a minimum length of 150 mm. The preferred material is mild steel, an
29、d, if this material is used, it is convenient to use a mild-steel T-piece having a stem of dimensions 75 mm 25 mm 10 mm. If a material other than mild steel is used, a piece of this other material of width (25,0 0,5) mm and minimum length 150 mm shall be bonded to the head of a T-piece of the kind d
30、escribed above. This allows the method to be used for testing an adhesive using two flexible adherends, one of which is bonded to the T-piece. The adhesive used for this purpose shall have adequate strength to ensure that this joint will not debond. 5.1.3 Flexible adherend The flexible adherend shal
31、l be capable of being bent through an angle a little greater than 90 without irreversible dimensional change. The flexible adherend shall be of dimensions (250,0 0,5) mm (25,0 0,5) mm. 5.2 Preparation of test specimens The procedure used in preparing the test specimens shall be such as to minimize v
32、ariations. The use of a pneumatic or hydraulic press, hand or power-operated, that can apply a pressure of up to 1 MPa, is recommended. Surface treatments shall be in accordance with EN 13887, or, if not feasible, in accordance with the manufacturers instructions. The adhesive under test shall be ap
33、plied, allowed to set, and, if necessary, cured in accordance with the recommendations of the manufacturer of the adhesive. A convenient method of obtaining a sharp adhesive boundary is to place a thin strip of material to which the adhesive does not adhere (anti-adhesive strip) at the end at which
34、separation will commence of one of the adherends (see Figure 1). If a rigid adherend other than the T-piece described in 5.1.2 is used, it shall be fastened to a T-piece of the kind described in 5.1.2 by a suitable method. Bond the flexible adherend to the T-piece (or other rigid adherend) as shown
35、in Figure 1, preferably using the method recommended by the manufacturer of the adhesive under test. If a press is used to make the test specimens, it shall be capable of applying an even pressure over the entire bonded area and should preferably be fitted with a timer-controlled release mechanism.
36、In order to provide a uniform distribution of pressure over the bonded area, the platens of the press shall be parallel. When this is impracticable, one platen shall be covered with a resilient pad. A 10 mm thick pad of rubber of Shore A hardness approximately 45 has been found to be satisfactory, u
37、sing a press that applies a pressure of up to 700 kPa. Determine the average thickness of the applied adhesive as accurately as practicable by weighing or another suitable technique. 5.3 Number of test specimens A minimum of 5 specimens shall be tested. BS EN 28510-1:2014EN 28510-1:2014 (E) 5 6 Cond
38、itioning and testing atmosphere The test specimens shall be conditioned and tested in one of the standard atmospheres specified in EN ISO 291. 7 Procedure Place the stem of the T-piece in the grip at the non-sensing end of the test machine (see Figure 1). Position the test specimen in such a way tha
39、t the centreline of the test machine coincides with the centre of the bonded area and is normal to the plane of the bond. Connect the free end of the flexible adherend to the wire by means of its grip. Set the machine in motion at a constant rate of grip separation. The recommended rate of grip sepa
40、ration is (50 5) mm/min. Record the rate of grip separation. Also record the force as a function of grip separation, preferably autographically. Continue the test until a bonded length of at least 50 mm each side of the centre of the T-piece has separated. Note the type of failure, i.e. adhesive fai
41、lure, cohesive failure or adherend failure. 8 Expression of results For each specimen, determine from the curve of force versus grip separation the average peel force, in newtons, over a peel length of 50 mm each side of the centre of the T-piece. This may be done by drawing an estimated average lin
42、e (see Figure 2) or by planimetry, or by another suitable means if a more accurate result is required. Record the maximum and minimum force in this range. Calculate the arithmetic mean of the average peel forces for all the specimens tested, as well as the arithmetic means of the maximum and minimum
43、 forces. For the statistical treatment of results, see ISO 5725-2. If required, initial peak values occurring outside the test peel length may be recorded separately, but are excluded from the averaging procedure. 9 Precision The precision of this test method is not known because inter-laboratory da
44、ta are not available. 10 Test report The test report shall include, at least, the following information: a) reference to this standard (EN 28510-1); b) complete identification of the adhesive tested, including type, source, manufacturers code number, batch or lot number, form, etc.; c) complete desc
45、ription of the adherends, including dimensions, type of material and surface preparation; d) description of the bonding process, including method of application of adhesive, drying or pre-curing conditions and curing time (where applicable), and bonding temperature and pressure; e) average thickness
46、 of the adhesive layer after formation of the bond; f) complete description of the test specimens, including dimensions, construction and number tested; g) conditioning procedure prior to testing, and the atmosphere; h) rate of separation of the grips; BS EN 28510-1:2014EN 28510-1:2014 (E) 6 i) meth
47、od of determining the average peel force; j) maximum, minimum and average values of the peel force, in newtons, for each test specimen, and the arithmetic means of these values for all the test specimens; k) the type of failure for each test specimen, i.e. adhesive, cohesive or adherend; l) any devi
48、ation from the procedure specified that may have affected the results. Key 1 rigid adhered 2 wire (minimum length 600 mm), connected to sensing element of tensile testing machine 3 grip 4 flexible adherend 5 anti-adhesive strip (see 5.2) a Connected to non-sensing grip of tensile testing machine Fig
49、ure 1 Schematic diagram 90 peel test for a flexible-bonded-to-rigid assembly BS EN 28510-1:2014EN 28510-1:2014 (E) 7 Key 1 centre of T-piece 2 estimated average value of peel force X Peel length, mm Y Force, N Figure 2 Typical peel force curve BS EN 28510-1:2014EN 28510-1:2014 (E) 8 Bibliography 1 EN ISO 527, Plastics Determination of tensile properties (ISO 527) 2 EN ISO 8510-2, Adhesives - Peel test for a flexible-bonded-to-rigid test specimen assembly - Part 2: 180 degree peel (ISO 8510-2:2006) This page deliberately left b
