ASTM C1266-2002(2007) Standard Test Method for Flow Characteristics of Preformed Tape Sealants《预制胶带密封剂流动特性的标准试验方法》.pdf

1、Designation: C 1266 02 (Reapproved 2007)Standard Test Method forFlow Characteristics of Preformed Tape Sealants1This standard is issued under the fixed designation C 1266; 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 describes a laboratory procedure fordetermining the flow characteristics of preformed tape sealants

3、after a specified time, temperature, and load.1.2 The values stated in SI units are to be regarded as thestandard. The inch-pound units given in parentheses areprovided for information purposes only.1.3 The committee with jurisdiction of this specification isnot aware of any similar specification wi

4、thin ISO or any otherorganization.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 limita

5、tions 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: com-pound, seal, sealant, substrate and tape sealant.4. Summary of

6、 Test Method4.1 The tape sealant to be tested is rolled into spherical ballsof equal weight. Four spherical balls are placed between twoaluminum plates, which are then compressed. A standardweight is placed on the test assembly for1hatroomtemperature. The height of the test assembly is measured tode

7、termine the rebound of the sample. The test assembly is thenplaced in an 88C (190F) oven with the standard weight on it.After 24 h the height of the test assembly is measured again todetermine the flow of the sample.5. Significance and Use5.1 Tape sealants are tacky, deformable solids, which areused

8、 under compression between two or more surfaces ofsimilar or dissimilar substrates in a variety of sealing applica-tions. These tapes are normally supplied in a roll form with arelease paper interlever and are hand pressed against a fixedsubstrate. This procedure is designed to give an indication of

9、the flow characteristics of a tape sealant under controlledtemperature and aging conditions with a specified load.6. Apparatus6.1 Aluminum Plates, four, each 6.35 by 76.2 by 101.6 mm(0.25 by 3.00 by 4.00 in.).6.2 Lead Weights, two, each 3.63 kg (8.0 lb) with dimen-sions large enough to cover the ent

10、ire assembly, but notoverhanging the assembly.6.3 Mechanical Convection Oven, capable of maintaining atemperature of 88 6 1C (190 6 2F).6.4 Steel Spacers, six, each 76.2 by 5.08 by 5.08 6 0.05 mm(3.00 by 0.20 by 0.20 6 0.002 in.).6.5 Thickness Gage, having a total capacity of at least 76.2mm (3.00 i

11、n.) graduated in 0.025 mm (0.001 in.) divisions. Thegage shall be equipped to provide a 57 g (2 oz) load over aminimum contact area of 6.35 mm (0.25 in.).6.6 Laboratory Press, at room temperature, to compress thepreformed sealant tape to the proper material thickness.6.7 Stop Watch, to measure the t

12、imed intervals specified inthe laboratory procedure.6.8 Laboratory Precision Balance (capable of weighing to0.1 mg) to measure the weight of the individual spherical ballsof tape.7. Sampling7.1 Samples to be tested shall be taken from a fresh roll oftape sealant taken directly from a randomly select

13、ed commer-cial container as supplied by the manufacturer, after firstremoving and discarding approximately the first 0.61 (2 ft) ofthe roll.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral

14、 Test Methods.Current edition approved June 1, 2007. Published July 2007. Originally approvedin 1995. Last previous edition approved in 2002 as C 1266 02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMS

15、tandards 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.8. Standard Test Conditions8.1 Unless otherwise specified by those authorizing the test,stan

16、dard conditions of temperature and relative humidity shallbe 236 2C (73.4 6 3.6F) and 50 6 5 % respectively.9. Test Assembly Preparation9.1 A total of two assemblies per tape are to be prepared.9.1.1 Prepare a test assembly as follows:9.1.1.1 Clean two aluminum plates with isopropyl alcohol(IPA) or

17、other suitable solvent.9.1.1.2 Using a marking pen, draw intersecting diagonals onone side of both metal plates. On each plate mark four points32 mm (1.25 in.) from the intersection of the diagonals asshown in Fig. 1. These become the top surfaces.9.1.1.3 Stack the plates, and using the thickness ga

18、ge,measure the combined height of two aluminum plates at theintersection of the diagonals. Record as aluminum thickness(A).9.1.1.4 Using a laboratory precision balance, weigh out fourlengths of tape sealant to 4.00 6 0.05 g each. Each 4 g sampleshould be tightly rolled into a spherical ball without

19、workingthe material excessively avoid entrapping air. Condition thefour balls of tape for 1 h according at standard conditionsbefore proceeding to 9.1.1.5.9.1.1.5 Place each of the four4 g spherical balls of tapesealant at quarter points (31.75 mm (1.25 in.) from theintersection of the diagonals) of

20、 the diagonals on one of themetal plates.9.1.1.6 Place three steel spacers on the aluminum plate, oneinboard between the spherical balls of tape and one spaceroutboard of the balls of tape as shown in Fig. 2. The spacer barsshould not contact the compound.9.1.1.7 Position the other aluminum plate ev

21、enly over thespherical balls of tape sealant with the face marked withdiagonals away from the tape sealant (Fig. 2).9.1.1.8 Center the assembly on the base plate of the labpress at room temperature and compress firmly to the spacerbars, until the spacer bars cannot be moved by hand. Maintainthis com

22、pression mode for 1 min. At the end of 1 min raise thepress and remove the assembly taking care not to disturb it.Carefully remove the spacer bars (see Fig. 3).10. Conditioning10.1 Condition the test assemblies at standard conditions for1h.11. Procedure11.1 After 1 h at standard conditions, using th

23、e thicknessgage, measure the thickness of each test assembly at theintersection of the diagonals to 0.025 mm (0.001 in.). Recordthis value as (B). For each assembly calculate the reboundheight of the tape sealant as follows:R 5 B 2 A (1)where:R = rebound height, mm (in.),B = combined aluminum and ta

24、pe sealant thickness aftertime specified, mm (in.), andA = combined aluminum thickness as determined in9.1.1.3, mm (in.).11.2 Place both test assemblies in a mechanical convectionoven maintained at 88 6 1C (190 6 2F). Position a 3.63 kg(8.0 lb) weight on top of each test assembly. Center the weighto

25、n each test assembly, avoiding sliding of the weight during thetest. Expose the test specimens at 88 6 1C (190 6 2F) for 24h.11.3 After 24 h, remove the test assemblies from the oven,remove the weight and allow the test assemblies to cool atstandard conditions for 15 min.11.4 Measure the thickness o

26、f each test assembly as de-scribed in 11.1 and record as value (C).12. Calculation12.1 For each assembly calculate the flow of the tape asfollows:F 5 B 2 C (2)where:F = flow, mm (in.),B = combined aluminum and tape sealant thickness aftertime specified (see 11.1), mm (in.), andC = combined aluminum

27、and tape sealant thickness afterexposure (see 11.4), mm (in.).12.2 For each assembly calculate the residual height of thetape as follows:H 5 R 2 F (3)where:H = residual height after exposure, mm (in.),R = rebound height (see 11.1), mm (in.), andF = flow (see 12.1), mm (in.).12.3 For each assembly ca

28、lculate the percent loss of heightof the tape as follows:height loss,%FR3 100 (4)FIG. 1 Intersecting Diagonals on Metal PlateC 1266 02 (2007)2where:F = flow, mm (in.), andR = rebound height (see 11.1), mm (in.).13. Report13.1 Report the following information:13.1.1 Flow of each specimen,FIG. 2 Steel

29、 SpacersFIG. 3 Test Assembly After CompressionC 1266 02 (2007)313.1.2 Rebound height of each specimen, and13.1.3 The percent loss of height after exposure of eachassembly.14. Precision and Bias14.1 Precision:14.1.1 The precision calculations for this test method arebased on the results of four labor

30、atories testing eight materialsusing two specimens per test.14.1.1.1 FlowAt 95 % confidence level a variation of asmuch as 0.40 mm (0.016 in.) can be expected within a lab and0.89 mm (0.035 in.) between laboratories.14.1.1.2 ReboundAt 95 % confidence level a variation ofas much as 0.08 mm (0.003 in.

31、) can be expected within alaboratory and 0.30 mm (0.011 in.) between laboratories.14.1.1.3 Percent Height LossAt 95 % confidence level avariation of as much as 6.6 % can be expected within alaboratory and 17.8 % between laboratories.15. Keywords15.1 flow; preformed tape sealant; rebound; tape; tape

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35、mittee 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 1266 02 (2007)4