1、Designation: D 3393 91 (Reapproved 2005)Standard Specification forCoated FabricsWaterproofness1This standard is issued under the fixed designation D 3393; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 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 specification sets forth the minimum requirementsfor hydrostatic resistance of fabrics coated with rubber orplastics. Coated fab
3、rics satisfying these requirements are con-sidered to be waterproof.1.2 The values stated in SI units are to be regarded as thestandard. The inch-pound units given in parentheses are forinformation only.1.3 The following precautionary caveat pertains only to thetest method portion of this specificat
4、ion: This standard doesnot purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Docum
5、ents2.1 ASTM Standards:2D 751 Test Methods for Coated FabricsD 1566 Terminology Relating to Rubber3. Terminology3.1 Definitions:3.1.1 merrow seama sewn seam made to unite fabricpieces for coating: not to be included in the finished product.3.1.2 waterproofnessthe property of impenetrability byliquid
6、 water. (See Terminology D 1566.)3.1.3 water repellencythe property of being resistant towetting by liquid water. (See Terminology D 1566.)3.1.4 water resistancethe property of retarding both pen-etration and wetting by liquid water. (See TerminologyD 1566.)4. Summary of Test Method4.1 Circular spec
7、imens of the coated fabric to be tested forwaterproofness are exposed to a specific hydrostatic pressure,as detailed in Sections 6-9, and the upper exposed surface isexamined visually for penetration of water.4.2 Records to document compliance with this specificationshall be maintained by producers
8、and fabricators. Statisticallybased sampling plans may be utilized. In cases where resultsare in dispute, additional sampling and testing as agreed uponbetween the purchaser and the seller may be necessary.5. Significance and Use5.1 The purpose of this specification is to establish arecognized crite
9、rion for “waterproofness” in terms of a mini-mum hydrostatic resistance. The necessary definitions to pro-vide a common understanding of the meaning of this charac-teristic when it is used to describe a fabric coated with rubberor plastics are also given. The specification does not coverrequirements
10、 for water repellency or water resistance of fabricscoated with rubber or plastics.TEST METHOD6. Apparatus6.1 Hydrostatic Tester, capable of applying within6sapressure of 207 kPa (30 psi) on the specimen with an accuracyof 67.0 kPa (1.0 psi). The apparatus shall be equipped withtwo concentric ring c
11、lamps, having an inner diameter of 31.5 60.5 mm (1.24 6 0.02 in.) between which the specimens can beclamped in order to avoid slippage. The inside edges of the ringclamps that come into contact with the test specimen shall berounded to 0.3 to 0.5 mm (0.01 to 0.02 in.) to avoid cutting thespecimen. A
12、 seal shall be fitted on the lower clamp to preventleakage during the test.6.2 A type of equipment suitable for performing this test isdescribed in more detail in Section 37 of Test Methods D 751.7. Test Specimens7.1 At least ten specimens shall be cut from samples takenat random from the roll of co
13、ated fabric being tested. Thesmallest dimension of the test specimen shall be at least 12.5mm (0.5 in.) greater than the outside diameter of the ring clamp1This specification is under the jurisdiction ofASTM Committee D11 on Rubberand is the direct responsibility of Subcommittee D11.37 on Coated Fab
14、rics andRubber Thread.Current edition approved Oct. 1, 2005. Published October 2005. Originallyapproved in 1975. Last previous edition approved in 2001 as D 3393 91 (2001)e1.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For
15、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 States.mechanism of the testing apparatus. Unless otherwise speci-fied, specime
16、ns shall be taken no nearer the selvage than onetenth of the width of the coated fabric. If the fabric being testedhas any sewed or stitchless-jointed seams, excluding Merrowseams, the sample shall include specimens from the seam areawhich are cut so that the seam portion is in the center of thespec
17、imen.8. Procedure8.1 Before clamping each specimen in the testing machine,bring the water level up flush with the top of the seal so that noair pocket exists between the water surface and the specimen.In the case of materials coated on one side only, place thecoated side next to the water level, unl
18、ess otherwise specified.In the case of double-coated fabrics or double-textured fabrics,either side may be placed next to the water unless, the side tobe put facing downward against the water level is specified.8.2 Flex each specimen five times within 1 min by applyingand releasing a pressure of 207
19、 6 7.0 kPa (30 6 1.0 psi). Afterthe fifth flex, maintain the pressure at 207 6 7.0 kPa (30 6 1.0psi) for 60 6 5s.8.3 While each specimen is under pressure, visually exam-ine its upper surface to determine if there is any penetration ofwater. Penetration of water through any of the specimens testedsh
20、all be cause to reject the roll of coated fabric for failure tomeet the requirement for waterproofness.9. Report9.1 The report shall include the following:9.1.1 Reference to ASTM Specification D 3393.9.1.2 Test temperature,9.1.3 Number of specimens tested and number of specimenspenetrated by water,
21、and9.1.4 Pressure in kilopascals (or pounds-force per squareinch).10. Precision and Bias10.1 No statement is made about the precision and bias formeasuring waterproofness since the result merely stateswhether there is conformance to the criteria specified in theprocedure.11. Keywords11.1 coated fabr
22、ics; hydrostatic resistance; waterproofnessASTM 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
23、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 withdrawn. Your comments are invited either for revision
24、 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 your comments have not received a fair hearing you shou
25、ldmake 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).D 3393 91 (2005)2
