PURPOSE: To obtain the subject fabric having excellent hydraulic pressure resistance and water vapor permeability by coating fabric with a solution of a synthetic polymer consisting essentially of a polyurethane containing a specific amount of silicon dioxide fine powder having specified particle diameters or smaller plural times.
CONSTITUTION: A solution of a synthetic polymer consisting essentially of a polyurethane having uniformly dispersed 1wt.% or more nonporous silicon dioxide fine powder having 0.1μm or smaller average particle diameter is applied to fabric of fibers such as synthetic fibers and coagulated by a wet method to form a porous resin layer. Then, the similar resin solution is used and applied to the resin layer of the abric in the same way and a porous resin layer is formed to give a coated fabric having 1kg/cm2 or higher hydraulic pressure resistance and 6,000g/m224 hours or higher water vapor permeability, provided with both waterproofing performance and water vapor transmission. Before the resin solution is applied, the fabric is preferably subjected to water-repellent processing.
KAMEMARU KENICHI
NAKAGAWA KIYOSHI
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