STRIPPABLE PRESSURE-SENSITIVE ADHESIVE AND SHEET COATED THEREWITH

摘要

PROBLEM TO BE SOLVED: To remarkably improve the adhesive strength with the passage of time after coating a sheet and the peel strength with the passage of time after bonding, reduce a malodor (a rubber odor) derived from a natural rubber and enhance the safety for allergy in a strippable pressure-sensitive adhesive capable of bonding only when the pressure welding is carried out under a prescribed pressure or above without normally causing blocking even when superimposed and then readily strippable. SOLUTION: This adhesive composition consists essentially of a vinylic monomer graft copolymer latex of the natural rubber having a content of proteins derived from the natural rubber which is a strippable pressure-sensitive adhesive component of >=0.1 wt.% based on nitrogen thereof (a value of the content of the proteins expressed in terms of the amount of the nitrogen) and a filler and is composed by compounding 100 pts. expressed in terms of dry weight of the latex with 5-300 pts. expressed in terms of dry weight of the filler, 0-100 pts. expressed in terms of dry weight of a synthetic rubber latex and 0-100 pts. expressed in terms of dry weight of a synthetic rubber emulsion.