Water absorbent fibrous product and a method of producing the same
AssigneeHayashikane Shipbuilding & Engineering Co., Ltd.
InventorKazuo Saotome
Life of this patent
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Abstract
A water absorbent fibrous product comprising a fibrous cellulosic material impregnated with a water absorbent acrylic polymer and a fibrous material, which is produced by a method in which an aqueous solution of a monomeric component comprising acrylic acid and a radical initiator is diffused in a fibrous cellulosic material and heated, followed by blending with a fibrous material. The fibrous product exhibits a high water absorbency, and finds applications as high-quality disposable diapers, sanitary napkins, surgical pads, surgical sheets, paper towels or the like.
Claims18
A water absorbent fibrous product produced by a method comprising the steps of:
- (1) providing an aqueous solution comprised of water, a monomeric component comprising a water-soluble cross-linkable polyfunctional monomer, acrylic acid, 60 to 90% of the carboxyl groups of said acrylic acid being in the form of an alkali metal salt, and a radical initiator;
- (2) diffusing the aqueous solution in a fibrous cellulosic material in such proportions that the amount ratio of said monomeric component to said cellulosic material is in the range of from 5/95 to 50/50 to obtain an aqueous mixture;
- (3) heating the aqueous mixture at a temperature of 60.degree. C. or more to effect radical polymerization of said monomeric component to form a crosslinked acrylic polymer, thereby obtaining a polymerization product containing the fibrous cellulosic material impregnated with said polymer, followed by bringing to pieces;
- and
- (4) blending the polymerization product with a fibrous material.
A method of producing a water absorbent fibrous product which comprises the steps of:
- (1) providing an aqueous solution comprised of water, a monomeric component comprising a water soluble cross-linkable polyfunctional monomer, acrylic acid, 60 to 90% of the carboxyl groups of said acrylic acid being in the form of an alkali metal salt, and a radical initiator;
- (2) diffusing the aqueous solution in a fibrous cellulosic material in such proportions that the amount ratio of said monomeric component to said cellulosic material is in the range of from 5/95 to 50/50 to obtain an aqueous mixture;
- (3) heating the aqueous mixture at a temperature of 60.degree. C. or more to effect radical polymerization of said monomeric component to form a crosslinked acrylic polymer, thereby obtaining a polymerization product containing the fibrous cellulosic material impregnated with said polymer, followed by bringing to pieces;
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- (4) blending the polymerization product with a fibrous material.
Dependencies are inferred from the claim text.