1、July 2014 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 83
2、.180!%2g“2159768www.din.deDDIN EN 28510-1Adhesives Peel test for a flexible-bonded-to-rigid test specimen assembly Part 1: 90 peel;English version EN 28510-1:2014,English translation of DIN EN 28510-1:2014-07Klebstoffe Schlprfung fr flexibel/starr geklebte Proben Teil 1: 90-Schlversuch;Englische Fas
3、sung EN 28510-1:2014,Englische bersetzung von DIN EN 28510-1:2014-07Adhsifs Essai de pelage pour un assemblage coll flexible-sur-rigide Partie 1: Pelage 90;Version anglaise EN 28510-1:2014,Traduction anglaise de DIN EN 28510-1:2014-07SupersedesDIN EN 28510-1:1993-05www.beuth.deIn case of doubt, the
4、German-language original shall be considered authoritative.Document comprises 10 pages06.14 DIN EN 28510-1:2014-072 A comma is used as the decimal marker. National foreword This document (EN 28510-1:2014) has been prepared by Technical Committee CEN/TC 193 “Adhesives” (Secretariat: AENOR, Spain). Th
5、e responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-10-02 AA Prfung von Konstruktions-klebstoffen, -klebverbindungen und Kernverbunden. The DIN Standards corresponding to the International Stan
6、dards referred to in this document are as follows: ISO 5725-2 DIN ISO 5725-2 Amendments This standard differs from DIN EN 28510-1:1993-05 as follows: a) normative references have been updated; b) the standard has been editorially revised. Previous editions DIN EN 28510-1: 1993-05 National Annex NA (
7、informative) Bibliography DIN 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 method EN 28510-1 April 2014 ICS 83.180 Supersedes EN 28510-1:1993English Version A
8、dhesives - Peel test for a flexible-bonded-to-rigid test specimen 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-SchlversuchThis European Standard was approve
9、d by CEN on 9 February 2014. CEN members are bound to comply with 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 s
10、tandards may be obtained on application to the CEN-CENELEC Management 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 an
11、d notified to the CEN-CENELEC Management Centre has the same status 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, Hunga
12、ry, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any fo
13、rm and by any means reserved worldwide for CEN national Members. Ref. No. EN 28510-1:2014 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 28510-1:2014 (E) 2 Foreword This document (EN 28510-1:2014) h
14、as been prepared by Technical Committee CEN/TC 193 “Adhesives”, the secretariat of which is 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 sta
15、ndards shall be withdrawn at the latest by October 2014. Attention is drawn to the possibility 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 2
16、8510-1:1993. No technical provisions have been amended in this edition, however the references 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,
17、if any, associated with its use. It is the responsibility of the user to establish appropriate 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 environm
18、ental impact. As technological advantages lead to acceptable alternatives for these materials, 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 r
19、egulation. According to the CEN-CENELEC Internal Regulations, the national standards organizations 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,
20、France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 28510-1:2014-07EN 28510-1:2014 (E) 3 1 Scope This part of EN 28510 sp
21、ecifies a 90 peel test for the determination, under specified conditions, of the peel resistance 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 a
22、ngle of exactly 90 is required, a roller peeling device is used (see 4.1). The 90 peel test is 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 Norma
23、tive references The following documents, in whole or in part, are normatively referenced in this 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)
24、applies. EN 13887, Structural Adhesives - Guidelines for surface preparation of metals and plastics 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: Ba
25、sic method for the determination of repeatability and reproducibility of a standard measurement 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, i
26、n such a way that separation occurs progressively along the length of the bonded adherends. The 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 con
27、stant peel angle of exactly 90 is required), capable of supplying a tensile force with a constant 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 mor
28、e than 2 %. The response time of the machine shall be short enough not to affect the accuracy with 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 shal
29、l be suitable for firmly clamping the rigid adherend (see 5.1.2), while the other shall be suitable 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
30、of the tensile testing machine (4.1) by a wire of minimum length 600 mm. 5 Test specimens 5.1 Adherends 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. DIN EN 28510-1
31、:2014-07EN 28510-1:2014 (E) 4 The recommended thicknesses of test specimens are: metals 1,5 mm; plastics 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 hav
32、e a width of (25,0 0,5) mm and a minimum length of 150 mm. The preferred material is mild steel, and, 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 w
33、idth (25,0 0,5) mm and minimum length 150 mm shall be bonded to the head of a T-piece of the kind described 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 str
34、ength to ensure that this joint will not debond. 5.1.3 Flexible adherend The flexible adherend shall 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
35、of test specimens The procedure used in preparing the test specimens shall be such as to minimize variations. 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 n
36、ot feasible, in accordance with the manufacturers instructions. The adhesive under test shall be applied, 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
37、 strip of material to which the adhesive does not adhere (anti-adhesive strip) at the end at which 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
38、by a suitable method. Bond the flexible adherend to the T-piece (or other rigid adherend) as shown 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
39、 the entire bonded area and should preferably be fitted with a timer-controlled release mechanism. 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
40、10 mm thick pad of rubber of Shore A hardness approximately 45 has been found to be satisfactory, using 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
41、 specimens A minimum of 5 specimens shall be tested. DIN EN 28510-1:2014-07EN 28510-1:2014 (E) 5 6 Conditioning 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
42、at the non-sensing end of the test machine (see Figure 1). Position the test specimen in such a way that 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 g
43、rip. Set the machine in motion at a constant rate of grip separation. The recommended rate of grip separation 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
44、50 mm each side of the centre of the T-piece has separated. Note the type of failure, i.e. adhesive failure, 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 lengt
45、h of 50 mm each side of the centre of the T-piece. This may be done by drawing an estimated average line (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 avera
46、ge peel forces for all the specimens tested, as well as the arithmetic means of the maximum and minimum 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 aver
47、aging procedure. 9 Precision The precision of this test method is not known because inter-laboratory data 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 teste
48、d, including type, source, manufacturers code number, batch or lot number, form, etc.; c) complete description 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 co
49、nditions and curing time (where applicable), and bonding temperature and pressure; e) average thickness 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; DIN EN 28510-1:2014-07EN 28510-1:2014 (E) 6 i) method of determining the average peel
