Moisture-permeable waterproof laminated fabric and process for producing the same
AssigneeUnitika Ltd.
InventorsKunio Amemiya, Mikihiko Tanaka, Kenichi Kamemaru, Kiyoshi Nakagawa
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Abstract
A moisture-permeable waterproof laminated fabric comprising a water-repellant base fabric and at least one porous film provided on one surface of the base fabric. The porous film is formed of a synthetic polymer composed chiefly of a polyamino acid urethane resin and has numerous fine pores provided by microcells which are continuous in the direction of its thickness. The laminated fabric has satisfactory waterproofness and moisture permeability as required for munition, survival and sport uses.
Claims35
A moisture-permeable waterproof laminated fabric comprising a water-repellent base fabric and porous film means provided on one surface of the base fabric, the porous film means being formed of a synthetic polymer composed chiefly of a polyamino acid urethane resin, the porous film means having numerous fine pores provided by microcells continuous in the direction of its thickness.
A process for producing a moisture-permeable waterproof laminated fabric characterized in that the process includes the film forming step of coating one surface of a base fabric with a resin solution comprising a polyamino acid urethane resin, a pore forming agent and a polar organic solvent and thereafter immersing the fabric in water;
- and the water-repellency treatment step of applying a water repellent to at least the base fabric and thereafter heat-treating the fabric.
A process for producing a moisture-permeable waterproof laminated fabric characterized in that the process includes the first film forming step of coating one surface of a base fabric with a resin solution comprising a compound having a high affinity for the base fabric, a polyamino acid urethane resin and a polar organic solvent and thereafter immersing the fabric in water to form a porous film on the fabric, the second film forming step of coating the porous film with a resin solution comprising a polyamino acid urethane resin, a pore forming agent and a polar organic solvent and thereafter immersing the fabric in water;
- and the water-repellency treatment step of applying a water repellent to at least the base fabric and thereafter heat-treating the fabric.
A process for producing a moisture-permeable waterproof laminated fabric characterized in that the process includes the adhesive layer forming step of applying a liquid adhesive to one surface of a base fabric two-dimensionally discretely and drying the adhesive to form an adhesive layer on the base fabric, the adhesive containing a compound having a high affinity for the base fabric, the film forming step of coating the adhesive layer with a resin solution comprising a polyamino acid urethane resin, a pore forming agent and a polar organic solvent and thereafter immersing the fabric in water;
- and the water-repellency treatment step of applying a water repellent to at least the base fabric and thereafter heat-treating the fabric.
A process for producing a moisture-permeable waterproof laminated fabric characterized in that the process includes the film forming step of coating a releasable sheet with a resin solution comprising a polyamino acid urethane resin, a pore forming agent and a polar organic solvent and thereafter immersing the sheet in water to form a porous film on the sheet, the step of bonding the porous film to one surface of a base fabric with an adhesive and thereafter peeling the sheet off the porous film;
- and the water-repellency treatment step of applying a water repellent to at least the base fabric and thereafter heat-treating the fabric.
Dependencies are inferred from the claim text.