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E96-93 Standard test methods for water-vapor transmission of materials

ASTM
1993
Annual Book of ASTM Standards, Vol. 04.06, Philadelphia: American Society for Testing and Materials

ASTM, (1993), "E96-93 Standard test methods for water-vapor transmission of materials", Annual Book of ASTM Standards, Vol. 04.06, Philadelphia: American Society for Testing and Materials.
Abstract:
1. Scope

1.1 These test methods cover the determination of water vapor transmission (WVT) of materials through which the passage of water vapor may be of importance, such as paper, plastic films, other sheet materials, fiberboards, gypsum and plaster products, wood products, and plastics. The test methods are limited to specimens not over 1 1/4 in. (32 mm) in thickness except as provided in Section 9. Two basic methods, the Desiccant Method and the Water Method, are provided for the measurement of permeance, and two variations include service conditions with one side wetted and service conditions with low humidity on one side and high humidity on the other. Agreement should not be expected between results obtained by different methods. That method should be selected which more nearly approaches the conditions of use.

1.2 The values stated in inch-pound units are to be regarded as the standard. Metric inch-pound conversion factors for WVT, permeance, and permeability are stated in Table 1. All conversions of mm Hg to Pa are made at a temperature of 0ˇăC.

1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.M

2. Referenced Documents

C168 Termninology Relating to Thermal Insulating Materials

D2301 Specification for Vinyl Chloride Plastic Pressure-Sensitive Electrical Insulating Tape

D449 Specification for Asphalt Used in Dampproofing and Waterproofing

E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

Index Terms

permeability; plastics (general); plastic sheet and film; sheet material; thermal-insulating materials; thermal insulatin permeability films; water vapor transmission (WVT)
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Author Information and Other Publications Notes
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