Water setting paper

• US 4,846,932 A
• Filed: 12/17/1986
• Issued: 07/11/1989
• Est. Priority Date: 12/31/1986
• Status: Expired due to Fees

• Current Assignee: Kuromatsu Corporation Company Limited 3-3 Toranomon 3-Chome Minato-Ku Tokyo
• Original Assignee: Kuromatsu Corporation Company Limited
• Inventors: Saito, Yoshiro, Karita, Takeshi, Kuromatsu, Shunichiro
• Primary Examiner(s): SLUBY, PATRICIA
• Application Number:
  US06/943,645
• Time in Patent Office: 937 Days
• Field of Search: 428/537.5, 428/326, 428/913, 525/54, 525/32, 524/734, 162/125, 162/127, 162/164.5, 162/164.1, 162/168.1, 162/169, 162/164.6
• US Class Current: 162/127
• CPC Class Codes: A61L 15/28 Polysaccharides or their derivatives A61L15/225 takes precedence
• CPC Class Codes: A61L 15/60 Liquid-swellable gel-forming materials, e.g. super-absorbents
• CPC Class Codes: C08L 1/26 Cellulose ethers
• CPC Class Codes: D21H 21/22 Agents rendering paper porous, absorbent or bulky
• CPC Class Codes: D21H 27/32 with materials applied between the sheets attaching together paper or cardboard sheets B31F5/00; adhesives C09J
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/253 Cellulosic [e.g., wood, paper, cork, rayon, etc.]
• CPC Class Codes: Y10T 428/31993 Of paper

Abstract

Water setting paper (high water-absorbency material) comprised of pulp fiber, water-soluble resin and high wate-absorbency resin is produced in sheet form for use in urine containers or portable toilets. Water setting paper or the high water-absorbency sheet thus formed absorbs and solidifies the urine, allowing the urine to be disposed of easily, rapidly and hygienically.

Claims

1. A water setting paper formed of high water-absorbency material in sheet form and comprising pulp fiber, water-soluble resin and high water-absorbency cross-linked resin formed into a sheet.

2. The water setting paper of claim 1 wherein the high water-absorbency resin is comprised of a synthetic resin produced by the crosslinking of polyacrylic acid, polystyrene sulfonic acid, polyvinyl pyridine, maleic anhydride, carboxylmethylcellulose, polyethylene oxide, polyvinyl alcohol or cellulose ether.

3. The water setting paper of claim 1 wherein the water-soluble resin is comprised of carboxymethylcellulose (CMC-H), carboxyethylcellulose (CEC-H), or the respective aluminum salt, barium salt, zinc salt, tin salt or manganese salt thereof.

4. A urine disposal means comprising the water setting paper of claim 1 inserted into a urine bottle.

5. A urine disposal means comprising the water setting paper of claim 1 inserted into a portable toilet.

6. The water setting paper of claim 1 comprising a sandwich of the high water-absorbency resin between two paper sheets each of which are comprised of pulp fibers, water-soluble resin, and high water-absorbency resin.

7. The water setting paper of claim 1 wherein

the higher water-absorbency resin is comprised of a synthetic resin produced by the crosslinking of polyacrylic acid, polystyrene sulfonic acid, polyvinyl pyridine, maleic anhydride, carboxylmethylcellulose, polyethylene oxide, polyvinyl alcohol or cellulose ether;

and

the water-soluble resin is comprised of carboxymethylcellulose (CMC-H), carboxyethylcellulose (CEC-H), or the respective aluminum salt, barium salt, zinc salt, tin salt or manganese salt thereof.

8. The water setting paper of claim 1 wherein said sheet has three layers forming a sandwich structure having two outer layers and an inner layer;

said inner layer being formed of said high water-absorbency resin and said two outer layers being formed of a mixture of said pulp fiber and said water-soluble resin.

9. The water setting paper of claim 2 wherein said sheet has three layers forming a sandwich structure having two outer layers and an inner layer;

said inner layer being formed of said high water-absorbency resin and said two outer layers being formed of a mixture of said pulp fiber and said water-soluble resin.

10. The water setting paper of claim 3 wherein said sheet has three layers forming a sandwich structure having two outer layers and an inner layer;

said inner layer being formed of said high water-absorbency resin and said two outer layers being formed of a mixture of said pulp fiber and said water-soluble resin.

11. The water setting paper of claim 7 wherein said sheet has three layers forming a sandwich structure having two outer layers and an inner layer;

said inner layer being formed of said high water-absorbency resin and said two outer layers being formed of a mixture of said pulp fiber and said water-soluble resin.

12. The water setting paper of claim 11 wherein said water soluble resin is carboxymethylcellulose.