Absorbent material absorbent article, and method for production thereof

• US 5,518,761 A
• Filed: 06/05/1995
• Issued: 05/21/1996
• Est. Priority Date: 08/28/1992
• Status: Expired due to Fees

• Current Assignee: Nippon Shokubai Company Limited
• Original Assignee: Nippon Shokubai Company Limited
• Inventors: Konishi, Kazumasa, Hatsuda, Takumi
• Primary Examiner(s): Beck, Shrive
• Assistant Examiner(s): MAIORANA, DAVID MICHAEL
• Application Number:
  US08/465,614
• Time in Patent Office: 351 Days
• Field of Search: 427/180, 427/195, 427/377, 427/385.5, 427/189
• US Class Current: 427/180
• CPC Class Codes: A61F 13/0269 Tapes for dressing attachment for stoma bags A61F5/443; for nappies or sanitary towels A61F13/58; wound closure tapes A61B17/085; for surgical drapes A61B46/00; attaching catheters A61M25/02
• CPC Class Codes: A61F 13/15 Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body non-absorbent catamenial receptacles A61F5/44; Supporting or fastening means therefor; Tampon applicators
• CPC Class Codes: A61F 13/15203 Properties of the article, e.g. stiffness or absorbency chemical aspects A61L15/00
• CPC Class Codes: A61F 13/49 Absorbent articles specially adapted to be worn around the waist, e.g. diapers
• CPC Class Codes: A61F 13/515 characterised by the interconnection of the topsheet and the backsheet
• CPC Class Codes: A61F 13/531 having a homogeneous composition through the thickness of the pad A61F13/538, A61F13/539 take precedence
• CPC Class Codes: A61F 13/539 characterised by the connection of the absorbent layers with each other or with the outer layers
• CPC Class Codes: A61F 2013/15357 Stiffness, e.g. Taber rigidity
• CPC Class Codes: A61F 2013/15463 Absorbency
• CPC Class Codes: A61F 2013/530569 characterized by the particle size
• CPC Class Codes: A61F 2013/5307 characterized by the quantity or ratio of superabsorbent material
• CPC Class Codes: Y10T 442/3919 Including particulate material other than fiber
• CPC Class Codes: Y10T 442/699 Including particulate material other than strand or fiber material

Abstract

An absorbent material is provided which enjoys suppleness, possesses highly satisfactory absorption qualities (speed of absorption and capacity for absorption), allows section into pieces of desired size and shape, and excels in safety.

An absorbent material comprising 100 parts by weight of absorbent resin particles and 15 to 150 parts by weight of water, which absorbent material is in the form of a sheet having a thickness in the approximate range of 0.3 to 5 mm, the form of a sheet resulting from mutual adhesion of the absorbent resin particles.

Claims

1. A method for the production of an absorbent material comprising spreading 100 parts by weight of absorbent resin particles in the form of a planar layer having a thickness regulated in the approximate range of about 0.3 to 5 mm on a substrate and bringing 15 to 150 parts by weight of water and/or steam into contact with said planar layer without disturbing the constitution of said planar layer.

2. A method for the production of an absorbent material comprising spreading 100 parts by weight of absorbent resin particles and 0.1 to 10 parts by weight of at least one absorption auxiliary selected from the group consisting of water-insoluble minute particles, surfactants, and fibers together in the form of a planar layer having a thickness regulated in the approximate range of about 0.3 to 5 mm on a substrate and bringing 15 to 150 parts by weight of water and/or steam into contact with said planar layer without disturbing the constitution of said planar layer.

3. A method for the production of an absorbent material comprising spreading 100 parts by weight of absorbent resin particles and 0.1 to 10 parts by weight of at least one absorption auxiliary selected from the group consisting of water-insoluble minute particles, surfactants, and fibers together in the form of a planar layer having a thickness regulated in the approximate range of about 0.3 to 5 mm on a substrate and bringing 3 to 30 parts by weight of water and 5 to 50 parts by weight of a polyhydric alcohol into contact with said planar layer without disturbing the constitution of said planar layer.

4. A method for the production of an absorbent material comprising spreading 100 parts by weight of absorbent resin particles in the form of a planar layer having a thickness regulated in the approximate range of about 0.3 to 5 mm on a substrate and bringing 15 to 150 parts by weight of water and/or steam into contact with said planar layer without disturbing the constitution of said planar layer, wherein said bringing of water and/or steam into contact with said planar layer causes mutual adhesion of said absorbent resin particles when said particles are moistened.

5. The method for the production of an absorbent material according to claim 4, wherein said adhesion is not the result of a covalent bond between particles.

6. The method for the production of an absorbent material according to claim 4, wherein said water and/or steam is brought into contact with said planar layer without substantial shearing force on the absorbent resin particles.