Accession Number:

ADA279939

Title:

Diffusion of Water Vapour Through Cold Gore-Tex(trademark)

Descriptive Note:

Corporate Author:

DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s):

• Osczevski, Randall J.

Report Date:

1993-07-01

Pagination or Media Count:

22.0

Abstract:

A simple gravimetric procedure was devised to measure the water vapour diffusion resistance of waterproof, water vapour permeable textiles at temperatures below freezing. The apparent resistance of a hydrophilic film, part of a Gore-TexTM laminate, increased exponentially with a decrease in temperature. At sub-zero temperatures, water vapour transfer through this film was only a few percent of what it is at room temperature. The diffusion process in such materials is discussed. other hydrophilic films are likely to be similarly affected.

Descriptors:

• *RESISTANCE
• *DIFFUSION
• *WATER VAPOR
• TEMPERATURE
• PERMEABILITY
• MATERIALS
• FILMS
• FREEZING
• TRANSFER
• TEXTILES
• GRAVIMETRIC ANALYSIS
• FRENCH LANGUAGE
• ROOM TEMPERATURE
• CANADA
• COMPOSITE MATERIALS
• LAMINATES

Subject Categories:

• Meteorology
• Inorganic Chemistry
• Laminates and Composite Materials
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE