POLYPROPYLENE ADHESIVE TAPE

• Main Authors: WALTER SEIFRIED, GUENTHER CRASS
• Format: Patent
• Language: English
• Published: 05.10.1989
• Edition: 4
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; PERFORMING OPERATIONS; POLISHES; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

Disclosed is an adhesive tape based on a co-extruded, three-layer polypropylene base film which has been biaxially stretch-oriented in at least three stages and has been subjected on at least one side to corona treatment. The base film comprises a base layer and two covering layers. The base layer comprises polypropylene. The covering layer adjacent the adhesive layer includes polypropylene modified with a natural or synthetic resin having a softening point of about 70 DEG to 170 DEG C., and the other covering layer includes polypropylene modified with a diorganopolysiloxane. The new adhesive tape possesses high values of mechanical properties. The tape has good printability, and it does not contain an adhesion-promoting layer for the adhesive, nor a separating layer (release coat), since such layers are not required. The tape can also be processed without appreciable draw-off noises.