Patent ID: 6319593
Filing Date: 2001-11-20
Classification: A47L,B32B,Y10T

Abstract:
A cleaning sheet comprising:a base sheet, andat least one surface layer placed on said base sheet, said surface layer being made of a bundle of filaments oriented in one direction, said base sheet and said surface layer both containing thermoplastic resin and being bonded to each other at a plurality of bonding lines, which are formed by fusion-bonding to reduce the thickness of the surface layer and extend to intersect said one direction,wherein each bonding line has a length never traversing the whole surface layer, and the surface layer includes a plurality of holding regions each located between two bonding lines adjacent to each other in said one direction so that said two bonding lines hold individual filaments located therein to said base sheet,wherein at least one bonding line other than said two bonding lines is partially inserted into said holding region to have one end thereof positioned therein so that some of said filaments located therein are further held to said base sheet by said inserted bonding line, whereby a difference in level between a portion of filaments held by said inserted bonding line and a portion of remaining filaments not held by said inserted bonding line is most prominent at said one end of said inserted bonding line so that dust is enabled, when the cleaning sheet is used for wiping operation, to enter a gap between the base sheet and the portion of the remaining filaments not held by said inserted bonding line, from said one end of said inserted bonding line.