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:
Jun. 29, 1993
Filed:
Oct. 15, 1991
Ake Rosen, Helsingborg, SE;
Tetra Alfa Holdings S.A., Pully, CH;
Abstract
Flexible, creased material in sheet or web form for use in the manufacture of liquid-tight packing containers of good dimensional rigidity includes one or more base layers laminated to one another. The base layer is a mineral-filled thermoplastics material comprising between 50 and 80% calculated on the total weight of the mixture, of an inorganic, particulate mineral filler. The thermoplastic material is chosen among propylene-based polymers with a melt index of between 0.5 and 5 according to ASTM (2.16 kg, 230.degree. C.) and the base layer or base layers are provided with a pattern of crease lines which have been formed by plastic deformation in connection with or immediately after the extrusion of the base layer or base layers.