Cleaning tool

Patent metadata

Field	Value
Publication number	US-9826875-B2
Application number	US-201414766434-A
Country	US
Kind code	B2
Filing date	Jan 17, 2014
Priority date	Feb 7, 2013
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

To provide a production method for a cleaning tool and a cleaning body with which the attachment of a holding tool to the cleaning body is facilitated. Provided is a production method for a cleaning tool provided with a cleaning sheet, and a holding tool for holding the cleaning sheet. The cleaning sheet is provided with: a base part; and a first fiber assembly which is bonded to the base part. The production process includes a step in which tensile force imparted to the first fiber assembly is released, and fibers in a state of having been stretched by the tensile force are shrunk to form bent regions in the base part.

First claim

The invention claimed is:

1. A method of manufacturing a cleaning tool, wherein the cleaning sheet has a first sheet element, a second sheet element, and a first fiber assembly, said method comprising:
stretching at least part of fibers forming the first fiber assembly by applying a prescribed tension to obtain a stretched first fiber assembly,
bonding the stretched first fiber assembly to the first sheet element,
superposing and bonding the second sheet element to the first sheet element, wherein the first sheet element is sandwiched between the stretched first fiber assembly and the second sheet element, and
forming a first bent region in the first sheet element by releasing the application of the prescribed tension from the stretched first fiber assembly to cause shrinking of the fibers stretched by the prescribed tension,
wherein
an insertion opening is always kept open between the first sheet element and the second sheet element for a holder of the cleaning tool to be inserted, and
the first sheet element and the first fiber assembly have different elastic constants.

2. The method as defined in claim 1 , wherein the prescribed tension applied to the first fiber assembly is applied to all of the fibers forming the first fiber assembly.

3. The method as defined in claim 1 , wherein the prescribed tension applied to the first fiber assembly is applied only to fibers which are directly bonded to the first sheet element.

4. The method as defined in claim 1 , wherein said bonding the stretched first fiber assembly to the first sheet element includes applying another prescribed tension to the first sheet element.

5. The method as defined in claim 1 , comprising forming the insertion opening by the first bent region.

6. The method as defined in claim 5 , wherein said forming the insertion opening by the first bent region comprises:
superposing the stretched first fiber assembly, the first sheet element, and the second sheet element; and
bonding the stretched first fiber assembly, the first sheet element, and the second sheet element, and
wherein the application of the prescribed tension is released from the stretched first fiber assembly after the insertion opening is formed.

7. The method as defined in claim 5 , wherein said forming the insertion opening by the first bent region comprises:
bonding the stretched first fiber assembly and the first sheet element together,
forming the first bent region in the first sheet element by releasing the application of the prescribed tension from the stretched first fiber assembly,
superposing the second sheet element on the first sheet element after releasing the application of the prescribed tension from the stretched first fiber assembly, and
bonding the first sheet element and the second sheet element.

8. The method as defined in claim 1 , wherein the second sheet element has a second fiber assembly.

Assignees

• Unicharm Corp
• Unicharm Corp

Inventors

• Suda Tomokazu

Classifications

• B32B37/14

  characterised by the properties of the layers · CPC title

• A47L13/46

  Securing scouring or polishing cloths or sponges to the handles by gripping means, tongs, or the like · CPC title

• D04H3/147

  Composite yarns or filaments · CPC title

• A47L13/38

  Other dusting implements {(using adhesive surfaces A47L25/005)} · CPC title

• D04H1/541

  Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres · CPC title