1、Designation: C 907 03Standard 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 revision, the year of
2、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 a laboratory procedure fordetermining the tensile adhesive strength of a preformed tapesealan
3、t. 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 jurisdiction is not
4、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 regulatory limitat
5、ions prior to use.2. Referenced Documents2.1 ASTM Standards:C 717 Terminology of Building Seals and Sealants23. Terminology3.1 DefinitionsThe definitions of the following terms usedin this test method are found in Terminology C 717: adhesivefailure; cohesive failure; preformed tape sealant; sealant;
6、 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 tacky, deformable
7、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 cohesive nature and adh
8、esivebonding 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 6.1.6.2 Tensile T
9、esting 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 (orpounds-force)
10、.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) and 506 10 % relat
11、ive 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.8.1.2 Set the allen screw stop so that when the
12、 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 matching face, theentire 3.2-mm (0.125-in.) gap will be filled.1This test m
13、ethod is under the jurisdiction of ASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.30 onAdhesion.Current edition approved May 10, 2003. Published June 2003. Originallyapproved in 1979. Last previous edition approved in 1998 as C 907 98.2Annual Bo
14、ok of ASTM Standards, Vol 04.07.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 ent
15、ire 3.2-mm (0.125-in.) gap isfilled with sealant. Compress at the rate of 51 mm (2 in.)/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 car
16、e not to disturb it.8.1.6 With a knife, trim all excess sealant from the peripheryof the 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. Procedure
17、10.1 Activate the tensile testing machine for recording theforce required to pull the specimen 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 tempe
18、rature shall be 23 6 2C (73.4 6 3.6F). (Otherconditions may be used.)10.3 Record the peak 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
19、 For each specimen, calculate the maximum tensilestrength by dividing the force in newtons (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
20、test.12. Report12.1 Report the following information:12.1.1 Identificaton of the preformed 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
21、 test, and12.1.5 Conditioning and test temperatures used.13. Precision and Bias313.1 Repeatability (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 th
22、e same laboratory on thesame material will be expected to exceed 7.835 psi only about5 % 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 tw
23、o test results obtained in a differentlaboratory on the same material will be expected to 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 Headqu
24、arters and maybe obtained by requesting Research Report RR: C 241036.FIG. 1 Test FixtureC907032ASTM 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 determina
25、tion 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 technical committee and must be reviewed every five years andif not revised, either reapproved or with
26、drawn. 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 at a meeting of theresponsible technical committee, which you may attend. If you feel that you
27、r 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 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).C907033
