1、Designation: D 3807 98 (Reapproved 2004)Standard Test Method forStrength Properties of Adhesives in Cleavage Peel byTension Loading (Engineering Plastics-to-EngineeringPlastics)1This standard is issued under the fixed designation D 3807; the number immediately following the designation indicates the
2、 year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of the c
3、om-parative cleavage/peel strengths of adhesives for bondingengineering plastics when tested on a standard specimen andunder specific conditions of preparation and testing.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3
4、 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 to use.2. Referenced Docu
5、ments2.1 ASTM Standards:2D 907 Terminology of Adhesives3. Terminology3.1 DefinitionsMany of the terms used in this test methodare defined in Terminology D 9073.2 Definitions of Terms Specific to This Standard:3.2.1 semirigid adherend, nan adherend that has dimen-sions and physical properties that pe
6、rmit bending at designatedtest temperature through any angle up to 30 without breakingor cracking.4. Significance and Use4.1 This test method determines strength properties ofadhesives in cleavage peel by tension loading. It allows thecomparative testing of cleavage/peel strengths of bondedengineeri
7、ng thermoplastic adherends.4.2 Cleavage/peel forces are common in bonded assemblies.This test method gives information as to the performance ofsubstrate/adhesive combinations under cleavage/peel forces.5. Apparatus5.1 Tension Testing Machine, capable of applying a tensileload having the following pr
8、escribed conditions:5.1.1 Select the machine and loading range so that themaximum load on the specimen falls between 15 and 85 % ofthe upper limit of the loading range.5.1.2 Maintain the rate of movement between heads to beessentially constant under fluctuating loads.NOTE 1It is difficult to meet th
9、is requirement when loads aremeasured with a spring-type or pendulum-type weighing device. Gear-driven head separation is recommended.5.1.3 Equip the machine with suitable grips capable ofclamping the specimens firmly throughout the tests.5.1.4 The machine is autographic, giving a chart that can ber
10、ead in terms of centimetres ( inches) of separation as onecoordinate and applied load as the other coordinate.5.1.5 The applied tension as measured and recorded is to beaccurate within 61%.5.2 Conditioning Room or Desiccators, capable of main-taining a relative humidity of 50 6 5 % at 23 6 2C.6. Tes
11、t Specimen6.1 Laminated test panels (see Fig. 1) consist of twosemirigid adherends properly prepared and bonded together inaccordance with the manufacturers recommendations. Spe-cially prepared test specimens shall be 25.4 mm (1 in.) wide by177.3 mm (7 in.) long, but bonded only over approximately 7
12、6mm (3 in.) of their length. Test specimens of these samedimensions may also be cut from larger, fully laminated panels.6.1.1 Direct comparisons of different adhesives are madeonly when specimen construction and test conditions areidentical.NOTE 2General purpose ABS (acrylonitrile-butadiene-styrene)
13、molded plaques approximately 6.3 mm (0.25 in.) thick have been foundsatisfactory as adherends for structural adhesives. Other engineeringplastics and metals have been found satisfactory for specific adhesives.1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the di
14、rect responsibility of Subcommittee D14.40 on Adhesives forPlastics.Current edition approved April 1, 2004. Published April 2004. Originallyapproved in 1979. Last previous edition approved in 1998 as D 3807 98.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custo
15、mer Service at serviceastm.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.NOTE 3The adherend substrate selecte
16、d must exhibit sufficient tough-ness and stiffness to resist substrate failure, thus forcing the adhesive layerto absorb the stresses of the testing process. Should the substrate failcohesively, the ultimate cleavage/peel strength of the adhesive under testhas not been determined.6.2 Cut the bonded
17、panels into 25-mm (1-in.) wide testspecimens by a means that is not deleterious to the bond. Asuggested cutting process employs a band saw with a 6.3-mm(0.25-in.) thick blade with 18 teeth per 25.4 mm (1 in.) and12.5 mm (0.5 in.) wide. The feed rate and saw speed iscontrolled to minimize heat buildu
18、p during the sawing process.6.3 Separate the 101-mm (4-in.) long unbonded ends suffi-ciently to insert gripping wires for attachment to testingmachine jaws.6.3.1 The gripping wire employed shall be 20-gage steelwire 0.8 mm (0.03 in.) in diameter attached to the specimenin a manner shown in Fig. 1. T
19、wist the gripping wires togetheryielding approximately 10 twists per 25 mm (1 in.) of twistedlength.NOTE 4Alternative methods of gripping wire attachment may beemployed if necessary. Sufficient flexibility in the attaching wires must bemaintained to allow self-alignment of the gripping wires during
20、the courseof the pull testing of the specimens.6.4 Test at least ten test specimens for each adhesive.NOTE 5Within the limitations imposed by 6.1.1 under other specimenwidths may be used, provided the test machine grips are of ample widthto apply the load uniformly across the width of the adherends.
21、7. Conditioning7.1 Condition specimens for three days at a relative humid-ity of 50 6 5 % at 23 6 2C, except where the adhesivemanufacturer may specify such an aging period to be unnec-essary or a shorter period to be adequate.8. Procedure8.1 Clamp the connecting wires from the specimen (Fig. 1)in t
22、he test grips of the tension-testing machine. Apply the loadat a constant crosshead speed of 12.7 mm (0.5 in.)/min.8.2 During the cleavage/peel test make an autographicrecording of load values versus crosshead movement or loadversus distance peeled.8.3 Determine the cleavage/peel resistance over at
23、least a50.8-mm (2-in.) length of the bond line after the initial peak.9. Calculation9.1 Determine the average load (in kilonewtons per metrewidth of specimen required to separate the adherends) from theautographic curve for the first 50.8 mm (2 in.) of cleavage/peelafter the initial peak. It is pref
24、erred that the average load bedetermined from the curve with the use of a planimeter.NOTE 6In case a planimeter is not used, the average load may becalculated as the average of load readings taken at fixed increments ofcrosshead motion. For example, the load may be recorded at each 5-mm(0.2-in.) int
25、erval of head motion following the initial peak, until at leastseven readings have been obtained.10. Report10.1 Report the following information:10.1.1 Complete identification of the adhesive tested, in-cluding type, source, manufacturer code number, batch or lotnumber, form, etc.10.1.2 Complete ide
26、ntification of adherends used, includingmaterial, thickness, surface preparation, and orientation.10.1.3 Description of bonding process, including method ofapplication of adhesive, glue-line thickness, drying or precur-ing conditions (where applicable), curing time, temperature,and pressure.FIG. 1 C
27、leavage Peel Test SpecimenD 3807 98 (2004)210.1.4 Average thickness of adhesive layer after formationof the joint, within 0.025 mm (0.001 in.). Describe the methodof obtaining the thickness of the adhesive layer, includingprocedure, location of measurement, and range of measure-ments.10.1.5 Complete
28、 description of test specimens, includingdimensions and construction of test specimens, conditions usedfor cutting individual test specimens, number of test panelsrepresented, and number of individual test specimens.10.1.6 Conditioning procedure prior to testing.10.1.7 Type of test machine and cross
29、head separation rateused.10.1.8 Method of recording load and determining averageload.10.1.9 Average, maximum, and minimum cleavage/peelload values for each individual specimen.10.1.10 Average cleavage/peel strength in kilonewtons permetre width for each combination of materials and construc-tions un
30、der test and10.1.11 Type of failure for each individual specimen.11. Precision and Bias311.1 A precision and bias statement for this test method doesnot exist because resources necessary for round-robin testinghave not been forthcoming.12. Keywords12.1 adhesive bonds; cleavage; engineering plastics;
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34、mmittee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor 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).3Results of round-robin tests are available from ASTM International Headquar-ters, 100 Barr Harbor Drive, West Conshohocken, PA 194282959. RequestRR:D14-1002.D 3807 98 (2004)3
