Method for producing a polyvinyl alcohol sole

Details Method for producing a polyvinyl alcohol sole Method for producing a polyvinyl alcohol sole

1995-01-09

1995-12-19

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 54, B29C 4402

Patent

active

054766206

ABSTRACT:
A method of producing a polyvinyl alcohol sole and the product are disclosed. The method includes the steps of mixing starch and water in order to form a cool paste starch; mixing polyvinyl alcohol and water to form a polyvinyl alcohol solution; mixing the cool paste starch and an acid to form a first solution; mixing the first solution, the polyvinyl alcohol solution, activated carbon and a foaming agent in order to form a second solution; mixing a catalyst and the second solution to form a third solution; pouring the third solution into a sole-forming mold and heating the forming mold in order to form a polyvinyl alcohol sole, cooling tie sole-forming mold and removing the polyvinyl alcohol sole from the sole-forming mold; dehydrating the polyvinyl alcohol sole; neutralizing the polyvinyl alcohol sole; dipping the polyvinyl alcohol sole in water; and dehydrating and drying the polyvinyl alcohol sole.

REFERENCES:
patent: 4231169 (1980-11-01), Toyama et al.
patent: 4241124 (1980-12-01), Kremer et al.
patent: 4418483 (1983-12-01), Fujita et al.
patent: 4999072 (1991-03-01), Dischler
patent: 5036603 (1991-08-01), Dischler
patent: 5308420 (1994-05-01), Yang
patent: 5318645 (1994-06-01), Yang
patent: 5350544 (1994-09-01), Bambara et al.

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