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. 22, 1986
Filed:
Oct. 24, 1983
Herbert Engelsberger, Viersen, DE;
Feldmuhle Aktiengesellschaft, Dusseldorf, DE;
Abstract
A mutilayer film, as shown in FIG. 3, consists of a support film (6) and a blown, coextruded composite film (1), which is joined to the support films (6) by means of an adhesive (5) and is interlocked into a tube (1'). The layers of the composite film (1) consist of polyethylenes or polyethylene copolymers of different mechanical shock resistance. At least one of the polyethylenes or polyethylene copolymers has a mechanical shock resistance of more than 100 cN. The composite film (1), interlocked into a tube (1'), has two outer layers (A, A') of corresponding material and thickness and two inner layers, (B, B') of corresponding material thickness. The inner layers (B, B') are connected by interlocking and the outer layers (A, A') are connected to the inner layers (B, B') by melt bonding.