PRESSURE SENSITIVE ADHESIVE LAYER FOR CLEANING, PROCESS FOR PRODUCING THE SAME, CLEANING SHEET, DELIVERY MEMBER WITH CLEANING FUNCTION, AND METHOD OF CLEANING OFF FOREIGN MATTER

摘要

A pressure sensitive adhesive layer for cleaning that excels in both of the capabilities of delivery within substrate treating apparatus and removal of foreign matter adhering in the apparatus and thus is suitable for use in a cleaning sheet; a process for producing the same; a cleaning sheet; a delivery member with cleaning function; and a method of cleaning off foreign matter. There is provided a pressure sensitive adhesive layer for cleaning having a planar surface and used to remove any foreign matter from a treatment object, the layer consisting of a product of hardening of a radiating hardening or thermosetting acrylic pressure sensitive adhesive containing an acrylic polymer, characterized in that the surface of the pressure sensitive adhesive layer has discontinuous open depressions, and that the average diameter of openings is smaller than the average size of foreign matter.