Frontal tape-based diaper closure system

Claim 1

A diaper tape closure system comprising a disposable diaper having a first closure surface comprising a reinforcement film substrate, the reinforcement film substrate having a first inner face having an adhesive layer and a second outer face having a low adhesion backsize (LAB) layer, a second closure surface comprising a fastening tab having a backing substrate and an adhesive layer on said backing substrate, for removable attachment to said first closure surface LAB layer second outer face, said fastening tab adhesive layer consisting essentially of: (a) 30 to 60 weight percent of an elastomer component comprised of a block copolymer with A blocks derived primarily from styrene and B blocks derived primarily from isoprene wherein at least 25 percent of the block copolymer is in the form of an AB diblock copolymer, (b) 40 to 70 weight percent of a solid B block compatible tackifying resin admixed when necessary with a liquid tackifying resin or a processing oil so as to provide an adhesive composition having a CMTg of from 244 to 265 Kelvin which adhesive layer on said fastening tape exhibits a shear adhesion of at least about 200 minutes to the first closure surface LAB layer second outer face and substantially non-shocky peel at 135 degrees of at least about 300 grams per inch tested against a LAB coated BOPP film and wherein the tape adhesive composition falls within one of regions I to III of FIG. 1, wherein the diaper is closed by attaching said fastening tab to said first closure surface LAB layer second outer face.