High performance pressure sensitive adhesive tapes
AssigneeAvery Dennison Corporation
InventorsSebastian S. Plamthottam, Yehuda Ozari
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Abstract
A pressure sensitive adhesive tape comprises a carrier layer having a thickness of 0.1 to 4.0 millimeter and comprising a rubber based pressure sensitive adhesive matrix including a polythiol crosslinking agent and 10 to 30% by volume low density microspheres. Preferably, at least one pigment is present in an amount sufficient to color the tape. Fumed silica is preferably present in an amount up to 5% by weight. The tape preferably has a skin layer on each side of the carrier layer. The skin layer has a coating thickness of 25 to 125 g/m.sup.2 and comprises a pressure sensitive adhesive matrix preferably the same as the carrier layer which is free of rigid, low density microspheres.
Claims4
An electron beam cured pressure sensitive adhesive tape having:
- a carrier layer prepared from a composition comprising a rubber-based black copolymer matrix and a polythiol crosslinking agent and from about 5% to about 70% by volume low density microspheres;
- and
- a skin layer on at least one side of the carrier layer, said skin layer comprising a rubber-based adhesive block copolymer matrix and a polythiol cross-linking agent;
- wherein said pressure sensitive adhesive tape has a peel adhesion of from about 4000 to 12,000 Newtons/meter and a shear adhesion failure temperature of at least about 90.degree. C.
Dependencies are inferred from the claim text.