Invention Grant
- Patent Title: Bioriented polyethylene film
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Application No.: US14240776Application Date: 2011-08-26
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Publication No.: US10363700B2Publication Date: 2019-07-30
- Inventor: Xiao B. Yun , Rongjuan Cong , Jephrey Pan , Teresa P. Karjala
- Applicant: Xiao B. Yun , Rongjuan Cong , Jephrey Pan , Teresa P. Karjala
- Applicant Address: US MI Midland
- Assignee: Dow Global Technologies LLC
- Current Assignee: Dow Global Technologies LLC
- Current Assignee Address: US MI Midland
- International Application: PCT/CN2011/079020 WO 20110826
- International Announcement: WO2013/029223 WO 20130307
- Main IPC: B29C55/14
- IPC: B29C55/14 ; B29C55/00 ; B29C48/00 ; C08J5/18 ; C08L23/08 ; B32B15/08 ; B32B15/20 ; B32B27/08 ; B32B27/10 ; B32B27/16 ; B32B27/32 ; B32B27/34 ; B32B27/36 ; B32B7/02 ; B29C47/00 ; C08L23/10 ; B29K23/00

Abstract:
The present invention discloses a process for forming a biaxially oriented film. The process includes first selecting a polyolefin resin wherein said polyolefin resin comprises a linear low density polyethylene resin characterized by having from 9 to 35 weight percent of the total weight of linear low density polyethylene resin eluting from a CEF at a temperature greater than 97.0° C.; and further characterized by having a CDR of from 33 to 80 and a Mw Ratio of from 0.15 to 0.45. Next a film is formed from the polyolefin resin selected in the first step. Finally the film formed in the second step is oriented in a sequential manner. The films produced by this process are characterized by having an ultimate elongation at least 1.5 times greater in the MD as compared to the CD and the 2% secant modulus is a least 1.25 times greater in the CD as compared to the MD. The films are further characterized by having free residual shrinkage of less than 10% in the MD and less than 10% in the CD when exposed to a temperature of 90° C. for 10 minutes.
Public/Granted literature
- US20140205823A1 BIORIENTED POLYETHYLENE FILM Public/Granted day:2014-07-24
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