Removable adhesive sheet
AssigneeNichiban Co., Ltd.
InventorsHiroyasu Miyasaka, Yasuaki Kitazaki, Tetsuaki Matsuda, Junichi Kobayashi
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Abstract
A removable adhesive sheet comprising a substrate (A) and an adhesive composition layer which comprises elastic micro-balls (B) and an adhesive (C), the adhesive composition layer being formed on an adhesive layer forming surface of the substrate, wherein the mixing proportion of the elastic micro-balls (B) to the adhesive (C) in the adhesive composition layer is 1:10 to 10:1 in terms of weight ratio, and the protrusive areas of the elastic micro-balls (B) partially protruding from the surface of the adhesive composition layer is entirely covered with the adhesive (C) has an adhesion capability that is not lowered through a frequent repetition of bonding to and removing from an adherend.
Claims13
A removable adhesive sheet comprising a substrate (A) and an adhesive composition layer which comprises elastically deformable micro-balls (B), said micro-balls having a glass transition temperature ranging between -80.degree. and 10.degree. C., and an adhesive (C), the adhesive composition layer being formed on an adhesive layer-forming surface of the substrate, wherein (i) the mixing proportion of the elastic micro-balls (B) to the adhesive (C) in the adhesive composition layer is 1:10 to 10:1 in terms weight ratio and (ii) the protrusive areas of the elastic micro-balls (B) partially protruding form the surface of the adhesive composition layer is entirely covered with the adhesive (C), such that the adhesive sheet is repeatedly removable from contact between the adhesive composition layer and a surface.
Dependencies are inferred from the claim text.