Pressure-sensitive adhesive tape

Claim 1

A FILAMENT-REINFORCED PRESSURE-SENSITIVE ADHESIVE TAPE WOUND UPON ITSELF IN ROLL FORM AND COMPRISED OF A FLEXIBLE DUPLEX BACKING FILM FORMED OF A THIN HARD NONSTRETCHY ORIENTED POLYMER SUB-FILM AND A SUBSTANTIALLY THICKER AMORPHOUS POLYETHYLENE SUB-FILM WHICH ARE INTERFACIALLY INTEGRATED TO FORM A PERMANENTLY UNITARY COMPOSITE FILM, SAID ORIENTED POLYMER SUB-FILM BEING INHERENTLY OILPROOF, WATERPROOF, DIMENSIONALLY STABLE, HARD IN THE THERMOSOFTENING TERMPERATURE RANGE OF SAID POLYETHYLENE SUB-FILM, AND PROVIDING A FLAT SMOOTH BACK SURFACE; A LOWADHESION BACKSIZE COATING UPON THE BACK SURFACE OF SAID ORIENTED POLYMER SUB-FILM PROVIDING THE BACK SURFACE OF THE TAPE; A MONOLAYER OF NONWOVEN LONGITUDINAL LINEALLYALIGNED CONTINUOUS-FILAMENT REINFORCING YARNS PARTIALLY EMBEDDED AND AUTOGENOUSLY ANCHORED IN THE POLYETHYLENE SUB-FILM; AND AN AGRESSIVELY TACKY RUBBERY PRESSURESENSITIVE ADHESIVE COATING THEREON IN WHICH THE YARNS ARE PARTIALLY EMBEDDED SO AS TO BE COMPLETELY ENCASED AND SEALED BY THE BACKING FILM AND ADHESIVE, THE ADHSIVE COATING HAVING A FLAT EXPOSED SURFACE FACING INWARDLY IN THE WOUND ROLL AND CONTACTING SAID LOW-ADHESION BACKSIZE; THE ADHESIVE TAPE BEING UNWINDABLE FROM THE ROLL WITHOUT SPLITTING OR DELAMINATING.