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. 08, 2014
Filed:
Jan. 06, 2010
Joris Eem Van Der, Arnhem, NL;
Johannes Bos, Apeldoorn, NL;
Anton Peter DE Weijer, Nijmegen, NL;
Sanjay Rastogi, Eindhoven, NL;
Gerwin Elderman, Apeldoorn, NL;
Joris Eem Van Der, Arnhem, NL;
Johannes Bos, Apeldoorn, NL;
Anton Peter De Weijer, Nijmegen, NL;
Sanjay Rastogi, Eindhoven, NL;
Gerwin Elderman, Apeldoorn, NL;
Teijin Aramid B.V., Arnhem, NL;
Abstract
The present invention pertains to a polyethylene film and a process for manufacturing such film. The polyethylene film may have a ratio between the strength in a first direction in the film plane and the strength in a second direction in the film plane perpendicular to the first direction in the range of 0.1-10:1, the strength in at least one direction being at least 0.2 Gpa. The process for manufacturing a polyethylene film may have a starting UHMWPE polymer with an average molecular weight of at least 500,000 grams/mole, an elastic shear modulus determined directly after melting at 160° C. of at most 1.4 MPa, and a Mw/Mn ratio of at most 6 to a solvent-free compacting process and a stretching process under such conditions that at no point during the process the temperature of the intermediate polymer film is raised to a value above its melting point.