4A1_0198_ MEMBRANES FOR APPAREL WITH THE ADDITIONAL BARRIER FUNCTION FOR THE REDUCTION OF IRRADIATION HEAT LOSS

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A. V. Lunchev

Vitali T. Lipik

Published Aug 14, 2019

Abstract

A membrane is a thin layer of polymer on shell fabric of apparel. Beside waterproofing a membrane can increase the thermal protection of apparel by stopping irradiative heat loss.
We have modified a polyurethane membrane in two ways: addition of inorganic components and coating with different polymers. The addition of heat absorptive additives reduced heat transmittance of membrane from 85% to 3%. The presence of heat reflecting compounds decreased transmittance of PU film to 25%. Coating with polypyrrole revealed the highest decrease in heat transmittance (down to 1-3%) among all polymers. Both approaches made augmentation in clothing insulation when they were used in apparel.


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