FIELD: manufacture of gas-permeable materials containing layer of low-stretchable fabric and microporous coat for use in construction engineering.
SUBSTANCE: microporous coat contains composition of crystalline polymer and filler. Method of manufacture of gas-permeable material includes extrusion of coat on layer of low-stretchable material. Coat is made from composition of crystalline polymer and filler. Tension of non-woven material layer is increased.
EFFECT: enhanced strength or stiffness of non-woven material layers; facilitated procedure of process.
29 cl, 2 ex
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