Invention Grant
- Patent Title: Polyethylene film and method for the manufacture thereof
- Patent Title (中): 聚乙烯薄膜及其制造方法
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Application No.: US13143744Application Date: 2010-01-06
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Publication No.: US08771569B2Publication Date: 2014-07-08
- Inventor: Joris Eem Van Der , Johannes Bos , Anton Peter De Weijer , Sanjay Rastogi , Gerwin Elderman
- Applicant: Joris Eem Van Der , Johannes Bos , Anton Peter De Weijer , Sanjay Rastogi , Gerwin Elderman
- Applicant Address: NL Arnhem
- Assignee: Teijin Aramid B.V.
- Current Assignee: Teijin Aramid B.V.
- Current Assignee Address: NL Arnhem
- Agency: Oliff PLC
- Priority: EP09150304 20090109
- International Application: PCT/EP2010/050065 WO 20100106
- International Announcement: WO2010/079174 WO 20100715
- Main IPC: B32B27/32
- IPC: B32B27/32 ; C08F110/02

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.
Public/Granted literature
- US20110268951A1 POLYETHYLENE FILM AND METHOD FOR THE MANUFACTURE THEREOF Public/Granted day:2011-11-03
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