1、Designation: D 903 98 (Reapproved 2004)Standard Test Method forPeel or Stripping Strength of Adhesive Bonds1This standard is issued under the fixed designation D 903; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method covers the determinatio
3、n of the com-parative peel or stripping characteristics of adhesive bondswhen tested on standard-sized specimens and under definedconditions of pretreatment, temperature, and testing machinespeed.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are
4、 for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior t
5、o use.2. Referenced Documents2.1 ASTM Standards:2D 907 Terminology of Adhesives3. Terminology3.1 DefinitionsMany terms used in this test method aredefined in Terminology D 907.3.2 Definitions of Terms Specific to This Standard:3.2.1 flexiblein this test method, indicates a material ofthe proper flex
6、ural strength and thickness to permit a turn backat an approximate 180 angle in the expected loading range ofthe test without failure. In order to fulfill all terms of thedefinition, at least one of the adhered materials must beflexible.3.2.2 peel or stripping strengththe average load per unitwidth
7、of bond line required to separate progressively onemember from the other over the adhered surfaces at a separa-tion angle of approximately 180 and at a separation rate of 152mm (6 in.)/min. It is expressed in kilograms per millimetre(pounds per inch) of width.4. Apparatus4.1 Testing Machine A power-
8、driven machine, with aconstant rate-of-jaw separation or of the inclination balance orpendulum type, which fulfills the following requirements:4.1.1 The applied tension as measured and recorded isaccurate within 61%.4.1.2 Hold specimens in the testing machine by grips whichclamp firmly and prevent s
9、lipping at all times.4.1.3 The rate of travel of the power-actuated grip is 305mm (12 in.)/min. This rate which provides a separation of 152mm (6 in.)/min is to be uniform throughout the tests.4.1.4 Operate the machine without any device for maintain-ing maximum load indication. In pendulum-type mac
10、hines, theweight lever swings as a free pendulum without engagement ofpawls.4.1.5 The machine is autographic giving a chart having theinches of separation as one axis and applied tension as the otheraxis of coordinates.4.1.6 The capacity of the machine is such that the maximumapplied tension during
11、test does not exceed 85 % nor be lessthan 15 % of the rated capacity.4.2 Conditioning Room or DesiccatorsA conditioningroom capable of maintaining a relative humidity of 50 6 2%at 23 6 1C (73.4 6 2F), or desiccators filled with a saturatedsalt solution (Note 1) to give a relative humidity of 50 6 2%
12、at 23 6 1C are required for the conditioning of somespecimens.NOTE 1A saturated salt solution of calcium nitrate gives approxi-mately 51 % relative humidity at the testing temperature.5. Test Specimen5.1 The test specimen, shown in Fig. 1(a), consists of onepiece of flexible material, 25 by 304.8 mm
13、 (1 by 12 in.),bonded for 152.4 mm (6 in.) at one end to one piece of flexibleor rigid material, 25 by 203.2 mm (1 by 8 in.), with theunbonded portions of each member being face to face.1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of
14、Subcommittee D14.80 on MetalBonding Adhesives.Current edition approved April 1, 2004. Published April 2004. Originallyapproved in 1946. Last previous edition approved in 1998 as D 903 98.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servicea
15、stm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2 In order to maintain a separation rate of 152.4 mm (6in
16、.)/min the specimen is to be relatively nonextensible in theexpected loading range. Where a material is sufficiently exten-sible to lessen radically the separation rate, back it up with asuitable nonextensible material. In reporting such a test,completely identify the backing material and method.5.3
17、 Test materials are to be thick enough to withstand theexpected tensile pull but not over 3 mm (18 in.) in thickness.Wherever possible, the standard thickness of specimens is:metals, 1.6 mm (116 in.); plastics,116 in.; woods,18 in.; rubbercompounds, 1.9 mm (0.075 in.); and cotton duck, 627.4 gm/m2(3
18、0 oz/yd2). Other special materials, as well as the standardmaterials, are to be completely identified in the test report asspecified in Section 10.5.4 Test at least ten test specimens for each adhesive.5.5 Discard any specimen whose test result is out of line dueto some obvious flaw and retest.6. Pr
19、eparation of Test Specimen6.1 Precondition or prepare the surface of the area to bebonded in accordance with the recommendations of the manu-facturer of the adhesive.6.2 Bond the specimens in accordance with the procedureand recommendations as outlined by the manufacturer of theadhesive.6.3 While in
20、dividual specimens may be prepared, it isrecommended that specimens be cut from bonded panelsapproximately 152.4 mm (6 in.) in width as shown in Fig. 1(b),so that five standard 25-mm (1-in.) wide specimens areobtained from each panel.7. Conditioning7.1 Condition all specimens for 7 days by exposure
21、to arelative humidity of 50 6 2 % at 23 6 1C (73.46 2F) oruntil equilibrium is reached, except where the adhesive manu-facturer may specify such an aging period to be unnecessary ora shorter period to be adequate.7.2 Special conditioning procedures may be used by agree-ment between the purchaser and
22、 the manufacturer.8. Procedure8.1 Conduct the test as soon as possible after removing thetest specimens from the conditioning atmosphere and prefer-ably under the same conditions.8.2 Separate the free end of the 25-mm (1-in.) wide flexiblemember by hand from the other member for a distance of about1
23、 in. Place the specimen in the testing machine by clamping thefree end of the 8-in. long member in one grip, turning back thefree end of the flexible member and clamping it in the othergrip as shown in Fig. 2. Attach the separated end of thespecimen, with all separate parts except the one under test
24、securely gripped, to the recording head by means of a clampusing care to adjust it symmetrically in order that the tension isdistributed uniformly. Maintain the specimen during the testapproximately in the plane of the clamps. This may be doneeither by attaching the minimum weight required to the fr
25、eeend of the specimen or by holding the specimen against analignment plate (Fig. 2) attached to the stationary clamp. Ineither case, take into account the added weight in determiningthe load causing separation. Grip the 1-in. wide flexiblemember symmetrically and firmly without twisting in thepower-
26、actuated clamp. Adjust the autographic mechanism andchart to zero and start the machine. Strip the separatingmember from the specimen approximately at an angle of 180and continue the separation for a sufficient distance to indicatethe peel or stripping value. Peel at least one half of the bondedarea
27、, even though a peel or stripping value may be indicatedbefore this point.(a) Test Specimen (b) Specimens from Bonded PanelEnglish/Metric Equivalentsin.mm1252516152.412305FIG. 1 Test SpecimenFIG. 2 Specimen Under TestD 903 98 (2004)29. Calculation9.1 Determine the actual peel or stripping strength b
28、ydrawing on the autographic chart the best average load line thatwill accommodate the recorded curve. Report the load soindicated, corrected for any tare weight which may have beenused with the specimen as described in 8.2 expressed inkilograms per millimetre (pounds per inch) of width forseparation
29、 at 152.4 mm (6 in.)/min, as the peel or strippingstrength for the particular specimen under test.9.2 For each series of tests, calculate the arithmetic mean ofall the values, obtained and report as the “average value.”10. Report10.1 Report the following:10.1.1 Complete identification of the adhesiv
30、e and speci-men tested, including types, source, manufacturers codenumbers, form, etc.,10.1.2 Method of preparing test specimens, including mix-ing and dispensing of adhesive,10.1.3 Conditioning procedure used,10.1.4 Testing room conditions,10.1.5 Number of specimens tested,10.1.6 Speed of testing,1
31、0.1.7 Average value of peel or stripping strength,10.1.8 Maximum and minimum strength values of theseries,10.1.9 Individual test values, individual autographic charts,and other statistical data requested by the purchaser, and10.1.10 Type of failure.11. Precision and Bias11.1 A precision and bias sta
32、tement does not exist for thistest method because resources necessary for round-robin test-ing have not been forthcoming.12. Keywords12.1 adhesive bonding; peel strength; stripping strengthASTM International takes no position respecting the validity of any patent rights asserted in connection with a
33、ny item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technica
34、l committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration
35、at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor
36、 Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 903 98 (2004)3
