The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 1995
Filed:
Feb. 23, 1993
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A transparent, printable, biaxially orientated polyolefin multilayer film which can be sealed on both sides, having a base layer B and different top layers A and C located on both sides thereof in accordance with a layer build-up of ABC is provided. The base layer B contains a peroxidically degraded polypropylene polymer having a degradation factor in the range from about 3 to about 10. Top layer A contains a polymer mixture of two or more of the following co- and/or terpolymers: a copolymer of ethylene and propylene or ethylene and butylene or propylene and butylene or ethylene and another .alpha.-olefin having 5 to 10 carbon atoms or propylene and another .alpha.-olefin having 5 to 10 carbon atoms, or a terpolymer of ethylene and propylene and butylene or ethylene and propylene and another .alpha.-olefin having 5 to 10 carbon atoms. This polymer mixture of top layer A further contains a high-viscosity polydiorganosiloxane and silicon dioxide and, if appropriate, other added additives. Top layer C contains a copolymer of ethylene and propylene or ethylene and butylene or propylene and butylene or ethylene and another .alpha.-olefin having 5 to 10 carbon atoms or propylene and another .alpha. -olefin having 5 to 10 carbon atoms, or a terpolymer of ethylene and propylene and butylene or ethylene and propylene and another .alpha.-olefin having 5 to 10 carbon atoms and, if appropriate, other additives. Top-layer C has a non-cohesive covering of polydialkylsiloxane on its outer surface. The film is useful, for example, as a packaging film and in the production of laminates.