1、Designation: D3807 98 (Reapproved 2012)Standard Test Method forStrength Properties of Adhesives in Cleavage Peel byTension Loading (Engineering Plastics-to-EngineeringPlastics)1This standard is issued under the fixed designation D3807; the number immediately following the designation indicates the y
2、ear 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 () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of the com-
3、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 Th
4、is 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 Documen
5、ts2.1 ASTM Standards:2D907 Terminology of Adhesives3. Terminology3.1 DefinitionsMany of the terms used in this test methodare defined in Terminology D907.3.2 Definitions of Terms Specific to This Standard:3.2.1 semirigid adherend, nan adherend that has dimen-sions and physical properties that permit
6、 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 bondedengineering t
7、hermoplastic 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 prescr
8、ibed 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 this r
9、equirement 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 beread
10、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. Test Spe
11、cimen6.1 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 76mm (
12、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)molde
13、d plaques approximately 6.3 mm (0.25 in.) thick have been found1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.40 onAdhesives forPlasticsCurrent edition approved May 1, 2012. Published May 2012. Originallyapproved in
14、1979. Last previous edition approved in 2004 as D3807 98 (2004).DOI: 10.1520/D3807-98R12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summ
15、ary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.satisfactory as adherends for structural adhesives. Other engineeringplastics and metals have been found satisfactory for specific adhesives.NOTE 3The adhere
16、nd substrate selected 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
17、.6.2 Cut the bonded 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
18、minimize heat buildup 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 manne
19、r shown in Fig. 1. Twist 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 gr
20、ipping wires during 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 wid
21、th of the adherends.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 s
22、pecimen (Fig. 1)in the 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
23、 resistance over at 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 init
24、ial peak. It is preferred 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 ea
25、ch 5-mm(0.2-in.) interval 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
26、.10.1.2 Complete identification of adherends used, includingmaterial, thickness, surface preparation, and orientation.FIG. 1 Cleavage Peel Test SpecimenD3807 98 (2012)210.1.3 Description of bonding process, including method ofapplication of adhesive, glue-line thickness, drying or precur-ing conditi
27、ons (where applicable), curing time, temperature,and pressure.10.1.4 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-me
28、nts.10.1.5 Complete 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 tes
29、t machine and crosshead 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 an
30、d construc-tions under test and10.1.11 Type of failure for each individual specimen.11. Precision and Bias311.1 Aprecision 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; eng
31、ineering plastics; peelASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringem
32、ent of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical 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
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34、own to the ASTM Committee 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 AS
35、TM 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).3Results of round-robin tests and supporting data have been filed at ASTMInternational Headquarters and may be obtained by requesting Research ReportRR:D14-1002.D3807 98 (2012)3
