1、Designation: C 1263 95 (Reapproved 2005)Standard Test Method forThermal Integrity of Flexible Water Vapor Retarders1This standard is issued under the fixed designation C 1263; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r 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 visual determination of thethermal integrity of flexible water vapor retarders for t
3、hosematerials classified under Specification C 1136, including plas-tic, foil, or paper and composites of two or more of thesematerials to temperatures listed in the specification or purchasecontract. The vapor retarders are intended for use at tempera-tures of 20 to 150F (29 to 66C). This test meth
4、od does notcover mastics or barrier coatings applied in liquid form ormaterials intended for use as weather barriers.1.2 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-priat
5、e safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 168 Terminology Relating to Thermal InsulationC 1136 Specification for Flexible, Low Permeance VaporRetarders for Thermal Insulation3. Terminology3.1 Def
6、initionsDefinitions of terms used in this testmethod will be found in Terminology C 168.4. Significance and Use4.1 In many applications, the vapor retarders used on athermal insulation will be exposed to the temperatures listed in7.2. Cracking or delamination of the retarder under theseconditions wo
7、uld, in most cases, cause it to lose its effective-ness as a vapor retarder material.5. Apparatus5.1 1 in. (25 mm) Outside Diameter Solid, Mild SteelMandrel.5.2 Laboratory Oven, capable of maintaining 63F (2C)up to a temperature of 150F (66C).5.3 Laboratory Freezer, capable of maintaining 63F (2C)do
8、wn to a temperature of 20F (29C).5.4 Room or Cabinet, capable of maintaining 73.4 6 3F(23 6 2C) and 50 6 2 % relative humidity.5.5 Insulated Gloves.6. Test Specimen6.1 From each sampled vapor retarder, test three 1 ft (305mm) square specimens for each temperature extreme specified.7. Procedure7.1 Co
9、ndition test specimen at a temperature of 73.4 6 3F(23 6 2C) and a relative humidity of 50 6 2 % for a periodof 24 h.7.2 Expose the specimen and the mandrel to the testtemperatures of 20 and 150F (29 and 66C) for a period of4h.7.3 At the end of the exposure period, with specimen andmandrel at test t
10、emperatures, bend each specimen around themandrel once through an angle of 180 in 3 6 2 s so that theopposing sides are parallel. If the two surfaces of the testspecimen are materially different, six specimens shall be testedwith three specimens of each surface tested on the outside ofthe bend.NOTE
11、1When test conditions specify both low temperature and hightemperature exposure conditions on the same vapor retarder, it is satis-factory to use the same specimen or to select separate specimens for eachof the exposed temperatures, unless the specification or contract explicitlystates that exposure
12、 tests must be conducted on the same specimen. If thelatter is so, the test specimen must be reconditioned before submitting itto the next test temperature.7.4 Immediately examine each specimen, while in the bentcondition, for any cracks or delamination.NOTE 2Where multiple specimens are being exami
13、ned, it is permis-sible to remove the tested specimen, while still in the bent condition, fromthe mandrel to allow for rapid reuse of the mandrel. The specimen mustbe restrained in the bent condition with paper clips or other suitable meansuntil it returns to room temperature and is then examined.7.
14、5 To inspect for delamination, let each specimen return toroom temperature, open to a flat condition and examine.7.6 Any visible evidence of cracking or delamination on anyof the three specimens shall constitute failure.1This test method is under the jurisdiction ofASTM Committee C16 on ThermalInsul
15、ation and is the direct responsibility of Subcommittee C16.33 on InsulationFinishes and Moisture.Current edition approved Nov. 1, 2005. Published November 2005. Originallyapproved in 1994. Last previous edition approved in 2000 as C 1263 95 (2000).2For referenced ASTM standards, visit the ASTM websi
16、te, 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 19428-2959, United State
17、s.8. Report8.1 Report the following information:8.1.1 Identification of the material tested, including itscomposition and date of manufacture, if available.8.1.2 Test temperature(s).8.1.3 Date of testing.8.1.4 Pass or fail and description of the failure, if any.9. Precision and Bias9.1 No precision
18、measurement is necessary as this testmethod reports only a pass-fail condition of the test specimen.10. Keywords10.1 cracking; delamination; thermal integrity; vaporretardersASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mention
19、edin this standard. Users of this standard are expressly advised that determination 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
20、 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 additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of
21、 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 the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box
22、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 1263 95 (2005)2
