Cleaning sheet

• US 20020106478A1
• Filed: 11/30/2001
• Published: 08/08/2002
• Est. Priority Date: 12/01/2000
• Status: Abandoned Application

• Current Assignee: KAO Corporation
• Original Assignee: KAO Corporation
• Inventors: Kakiuchi, Shusuke, Hayase, Taeko, Mori, Kazuo
• Application Number:
  US09/996,946
• Publication Number:
  US 20020106478A1
• Time in Patent Office: Days
• US Class Current: 428/91
• CPC Class Codes: A47L 13/16 Cloths; Pads; Sponges metal scraping sponges A47L13/07
• CPC Class Codes: B24D 11/006 without embedded abrasive particles
• CPC Class Codes: B24D 3/28 Resins or natural or synthetic macromolecular compounds B24D3/22 takes precedence
• CPC Class Codes: B32B 5/26 another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: D04H 1/4374 using different kinds of webs, e.g. by layering webs
• CPC Class Codes: D04H 1/43828 sheath-core
• CPC Class Codes: D04H 1/4383 sea-island
• CPC Class Codes: D04H 1/43832 side-by-side
• CPC Class Codes: D04H 1/43835 Mixed fibres, e.g. at least two chemically different fibres or fibre blends
• CPC Class Codes: D04H 1/732 by fluid current, e.g. air-lay
• CPC Class Codes: D04H 11/08 formed by creation of a pile on at least one surface of a non-woven fabric without addition of pile-forming material, e.g. by needling, by differential shrinking needling machines D04H18/00
• CPC Class Codes: D21H 13/18 Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylonitriles
• CPC Class Codes: Y10T 428/2395 Nap type surface
• CPC Class Codes: Y10T 442/60 Nonwoven fabric [i.e., nonwoven strand or fiber material]
• CPC Class Codes: Y10T 442/697 Containing at least two chemically different strand or fiber materials

Abstract

A cleaning sheet which comprises 10 to 90% by weight of thermoplastic fibers having a fiber length of 2 to 15 mm and a fineness of 10 to 150 dtex and 10 to 90% by weight of cellulosic fibers, and has a large number of tips of the thermoplastic fibers exposed on the surface the cleaning sheet to have capability of scouring or scraping dirt off present on a soiled surface.

Claims

1. A cleaning sheet which comprises 10 to 90% by weight of thermoplastic fibers having a fiber length of 2 to 15 mm and a fineness of 10 to 150 dtex and 10 to 90% by weight of cellulosic fibers, and has a large number of tips of said thermoplastic fibers exposed on the surface of said cleaning sheet to have capability of scouring or scraping dirt off present on a soiled surface.

2. The cleaning sheet according to claim 1, which is impregnated with an aqueous detergent.

3. The cleaning sheet according to claim 1, which is obtained by forming an air-laid web comprising said thermoplastic fibers and said cellulosic fibers which have a fiber length of 0.1 to 15 mm and then bonding the fibers constituting said web by fusion or with a binder at their intersections.

4. The cleaning sheet according to claim 3, which comprises 30 to 90% by weight of said thermoplastic fibers and 10 to 70% by weight of said cellulosic fibers, and has a is basis weight of 40 to 300 g/m².

5. The cleaning sheet according to claim 1, which comprises a sheet and at least one air-laid nonwoven fabric which is provided on at least one side of said sheet,

said sheet and said air-laid nonwoven fabric being laminated together into one body,

said sheet containing 30 to 100% by weight of said cellulosic fibers and having a basis weight of 30 to 200 g/m²,

said air-laid nonwoven fabric containing 30 to 100% by weight of said thermoplastic fibers and having a basis weight of 30 to 200 g/m² with a large number of the tips of said thermoplastic fibers being exposed on the surface of said air-laid nonwoven fabric.

6. The cleaning sheet according to claim 5, which is obtained by

forming an air-laid web comprising said cellulosic fibers that have a fiber length of 0.1 to 15 mm and bonding the fibers constituting said web at their intersections by fusion or with a binder to prepare said sheet,

separating forming an air-laid web comprising said thermoplastic fibers and bonding the fibers constituting said web at their intersections by fusion or with a binder to prepare said air-laid nonwoven fabric, and

bonding said air-laid nonwoven fabric to at least one side of said sheet.

7. The cleaning sheet according to claim 5, which is obtained by

superposing an air-laid web comprising said thermoplastic fibers on at least one side of an air-laid web comprising said cellulosic fibers that have a fiber length of 0.1 to 15 mm and

bonding the fibers constituting each of said webs among themselves at their intersections and also bonding said webs to each other by fusion or with a binder.

8. The cleaning sheet according to claim 1, which has been embossed.

9. The cleaning sheet according to claim 1, wherein said thermoplastic fibers comprise a low-melting resin and a high-melting resin, said low-melting resin forming at least a part of the fiber surface.

10. The cleaning sheet according to claim 1, wherein said thermoplastic fibers are crimped fibers.

11. The cleaning sheet according to claim 2, wherein said aqueous detergent contains an electrolyte.

12. A method of cleaning a soiled surface which comprises spraying the cleaning sheet according to claim 1 with an aqueous detergent and then rubbing the soiled surface with the sprayed cleaning sheet.