SELF-PRIMING PRESSURE-SENSITIVE ADHESIVE TAPE

摘要

A self-priming pressure-sensitive adhesive bonding tape is provided having a layer of a primary pressure-sensitive adhesive material coated onto one or more surfaces with a film of a secondary pressure-sensitive adhesive material. Both the primary and secondary pressure-sensitive adhesives are modified by the addition of adhesion promoters to enhance the wetting characteristics of the tape. The film thickness of the secondary pressure-sensitive adhesive is such that the film has discontinuities which enable at least a portion of the primary pressure-sensitive adhesive layer to be directly exposed to the substrate. Bonding is accomplished with the participation of both the primary and secondary pressure-sensitive adhesives.