ASTM C907-2003(2008) Standard Test Method for Tensile Adhesive Strength of Preformed Tape Sealants by Disk Method《用圆盘法作预制密封带的抗拉粘结强度的标准试验方法》.pdf

1、Designation: C 907 03 (Reapproved 2008)Standard Test Method forTensile Adhesive Strength of Preformed Tape Sealants byDisk Method1This standard is issued under the fixed designation C 907; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revi

2、sion, 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 a laboratory procedure fordetermining the tensile adhesive strength of a pre

3、formed tapesealant. The type of failure can be determined, and the degreeof cohesive/adhesive failure can be estimated.1.2 The values stated in metric (SI) units are to be regardedas the standard. The values given in parentheses are providedfor information purposes only.1.3 The subcommittee with jur

4、isdiction is not aware of anysimilar ISO standard.1.4 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 r

5、egulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsThe definitions of the following terms usedin this test method are found in Terminology C 717: adhesivefailure; cohesive failure; preformed tape

6、sealant; sealant; andsubstrate.4. Summary of Test Method4.1 The preformed tape sealant is compressed between twoaluminum disks. The disks are pulled apart in a tensile tester tofailure. The maximum tensile strength and failure mode arerecorded.5. Significance and Use5.1 Preformed tape sealants are t

7、acky, deformable solids,that are used under compression between two or more sub-strates, in various sealing applications where the surfaces maybe of similar or dissimilar materials. This procedure measuresthe tensile strength of the preformed tape sealant. It alsoprovides an indication of the cohesi

8、ve nature and adhesivebonding properties of the preformed tape sealant. This proce-dure is not intended to simulate actual use conditions.6. Apparatus and Accessory Materials6.1 Test Fixture, fabricated of aluminum (mill finish), inaccordance with Fig. 1.NOTE 1Other substrates may be substituted in

9、6.1.6.2 Tensile Testing Machine, or equivalent, with a jawseparation rate of 51 mm (2 in.)/min.6.3 Auxiliary Hardware, for attachment of the test fixture tothe tensile tester.6.4 Knife.6.5 Compression Device, such as a vise, press, or equiva-lent.6.6 Device, for recording the tension load in newtons

10、 (orpounds-force).6.7 Solvent, such as xylol or toluol.6.8 Wiping Cloths, lint-free.7. Sampling7.1 Samples to be tested shall be taken from a fresh roll ofpreformed tape sealant after first removing and discarding thefirst 600 mm (2 ft) of the roll.7.2 Condition the sample at 23 6 2C (73.4 6 3.6F) a

11、nd 506 10 % relative humidity for a minimum of 24 h beforepreparing the test specimens.8. Test Specimens8.1 Prepare two test specimens as follows:8.1.1 Clean the surface of the test fixture with clean solventto remove grease, oil, or residue from previous test, and dry.1This test method is under the

12、 jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.30 onAdhesion.Current edition approved May 1, 2008. Published June 2008. Originallyapproved in 1979. Last previous edition approved in 2003 as C 907 03.2For referenced ASTM standards

13、, 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 Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19

14、428-2959, United States.8.1.2 Set the allen screw stop so that when the disks areassembled and the dowel is seated against it, the distancebetween the parallel disk surfaces is 3.2 mm (0.125 in.).8.1.3 Place sufficient preformed tape sealant on the face ofthe fixture so that when mated with the matc

15、hing face, theentire 3.2-mm (0.125-in.) gap will be filled.8.1.4 After mating, uniformly compress the test fixture inthe compression device until the dowel contacts the allen screwstop. Check to make sure the entire 3.2-mm (0.125-in.) gap isfilled with sealant. Compress at the rate of 51 mm (2 in.)/

16、minand hold in compression for 1 min. (Laboratories not able tocomply should record the method used and approximatecompression rate.)8.1.5 At the end of 1 min, remove the assembly from thepress device, taking care not to disturb it.8.1.6 With a knife, trim all excess sealant from the peripheryof the

17、 assembled fixture.9. Conditioning9.1 Condition the test specimens as prepared in Section 8,for1hat236 2C (73.4 6 3.6F) before testing.9.2 Other conditioning periods may be included if and asdesired.10. Procedure10.1 Activate the tensile testing machine for recording theforce required to pull the sp

18、ecimen apart.10.2 Attach the test fixture to the jaws of the tensile testingmachine, taking care to align them vertically, and separate at acrosshead speed of 51 mm (2 in.)/min until failure occurs. Thetest temperature shall be 23 6 2C (73.4 6 3.6F). (Otherconditions may be used.)10.3 Record the pea

19、k stress load in newtons (or poundsforce).10.4 Visually inspect and record the mode of preformedtape sealant failure, cohesive or adhesive and the appropriatepercentage of each type of failure.11. Calculation11.1 For each specimen, calculate the maximum tensilestrength by dividing the force in newto

20、ns (or pounds force) atthe peak stress load by 0.0527 m2(or 1.976 in.2) (the bondedarea of the fixture) to get units of pascals (or pounds force persquare inch).11.2 If the values are not within 10 %, repeat the test.12. Report12.1 Report the following information:12.1.1 Identificaton of the preform

21、ed tape sealant, that is,the name, lot number and any other identifying characteristics,12.1.2 Maximum tensile strength,12.1.3 Mode and approximate percent of failure, adhesiveor cohesive,12.1.4 Substrate used in test, and12.1.5 Conditioning and test temperatures used.13. Precision and Bias313.1 Rep

22、eatability (I(r)The repeatability (within a givenlaboratory) interval for 6 materials tested by 4 laboratories is7.835 psi. In future use of this test method, the differencebetween two test results obtained in the same laboratory on thesame material will be expected to exceed 7.835 psi only about5 %

23、 of the time.13.2 Reproducibility (I(R)The reproducibility (betweengiven laboratories) interval for 6 materials tested by 4 labora-tories is 48.611 psi. In future use of this test method, thedifference between two test results obtained in a differentlaboratory on the same material will be expected t

24、o exceed48.611 psi only about 5 % of the time.14. Keywords14.1 preformed tape sealant; tapes; tape sealants; tensileadhesive strength; tensile strength3Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR: C 241036.FIG. 1 Test Fixture

25、C 907 03 (2008)2ASTM 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 infringement of

26、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 for ad

27、ditional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration 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

28、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 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).C 907 03 (2008)3