CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a National Stage of International Application No. PCT/JP2020/037943 filed Oct. 7, 2020, claiming priority based on Japanese Patent Application Nos. 2019-185486 filed Oct. 8, 2019, 2019-185487 filed Oct. 8, 2019, 2020-168613 filed Oct. 5, 2020, and 2020-168636 filed Oct. 5, 2020, the disclosures of which are incorporated herein by reference in their entirety.

FIELD

The present invention relates to a cleaner sheet, a layered body of the cleaner sheet, a cleaning tool, and a method for producing the cleaner sheet.

BACKGROUND

Various cleaning tools (wiping tools) for cleaning floor surfaces such as flooring are widely known. A cleaning tool of this type includes, for example, a head attached to an end of a rod-shaped handle, and a cleaner sheet detachably attached to the head, and is used with the cleaner sheet fixed to the head (Patent Literature 1). The cleaning tool disclosed in Patent Literature 1 is configured to be able to capture dust or dirt (i.e., objects to be removed) on an object to be cleaned by bringing one side (i.e., a cleaning surface) of the cleaner sheet into sliding contact with a surface of the object to be cleaned such as a floor.

CITATION LIST

Patent Literature

Patent Literature 1: JP H9-220191 A

SUMMARY

Technical Problem

The cleaner sheet fixed to the cleaning tool for use, which is disclosed in Patent Literature 1, includes a fiber sheet in which fibers are assembled. Specifically, the cleaner sheet disclosed in Patent Literature 1 includes an outermost fiber sheet through which a plurality of holes penetrate in a thickness direction, and an adhesive layer superposed on the fiber sheet. The cleaner sheet disclosed in Patent Literature 1 can take advantage of the fine fiber structure of the fiber sheet to scrape and capture dust or dirt. Dust or dirt that comes into the holes can be captured by a surface of the adhesive layer with its adhesive force, and can be kept captured by the surface. The cleaner sheet disclosed in Patent Literature 1 has a certain degree of slidability. However, no sufficient consideration has been necessarily given on a cleaner sheet having good slidability, and a cleaner sheet with good slidability has been demanded.

In view of the abovementioned demand or the like, it is an object of the present invention to provide a cleaner sheet satisfying good slidability, a layered body of the cleaner sheet, and a cleaning tool including the cleaner sheet. It is also an object to provide a method for producing the cleaner sheet.

Solution to Problem

The cleaner sheet according to the present invention is a cleaner sheet including: a cleaning surface that is configured to be brought into sliding contact with a surface of an object to be cleaned, wherein the cleaning surface has unevenness, and includes projections respectively having distal ends configured to be in sliding contact with the object to be cleaned when in use, the projections are constituted by a member formed to have the projections arranged at intervals from each other in a plane direction of the cleaning surface, the member has a hardness of 0.4 MPa or more measured by the nano-indentation method, and the cleaning surface further includes adhesive recesses that have higher adhesive force than that of the member and are exposed on the cleaning surface.

The method for producing the cleaner sheet according to the present invention is a method for producing the above cleaner sheet, the method including: forming the member of the projections by coating.

The layered body of the present invention is composed of the above cleaner sheet in a state of being wound onto itself, or a plurality of the above cleaner sheets in a state of being laid on top of each other in a thickness direction.

The cleaning tool of the present invention includes: the above cleaner sheet; and a sheet fixing part to which the cleaner sheet is detachably attached.

