Invention Grant
- Patent Title: Multilayered stretched film with barrier property
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Application No.: US13160925Application Date: 2011-06-15
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Publication No.: US08367169B2Publication Date: 2013-02-05
- Inventor: Norio Uehara , Hiroyuki Yoshizaki , Naoyuki Maruichi
- Applicant: Norio Uehara , Hiroyuki Yoshizaki , Naoyuki Maruichi
- Applicant Address: JP Ayabe-shi, Kyoto JP Tokyo
- Assignee: Gunze Limited,Dai Nippon Printing Co., Ltd
- Current Assignee: Gunze Limited,Dai Nippon Printing Co., Ltd
- Current Assignee Address: JP Ayabe-shi, Kyoto JP Tokyo
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2009-253686 20091105
- Main IPC: B29D22/00
- IPC: B29D22/00 ; B29D23/00 ; B32B1/08

Abstract:
A multilayer stretched film with barrier property that is free from deterioration of barrier properties attributable to dimensional change caused by moisture absorption, and bending, etc. A multilayer stretched film with barrier property obtained by biaxially stretching a multilayer laminate including at least three layers, namely, a polyester-based resin layer (Layer A), a polyamide-based resin layer (Layer B), and a polyester-based resin layer (Layer A), in this order (wherein the two Layers A may be the same or different) to obtain a biaxially stretched multilayer film; and providing a deposition layer (Layer C) on at least one surface of the biaxially stretched multilayer film; both of the Layers A containing a crystalline polyester; Layer B containing 70 to 99 wt % of aliphatic polyamide and 1 to 30 wt % of aromatic polyamide; and Layer C containing an inorganic substance.
Public/Granted literature
- US08481137B2 Multilayered stretched film with barrier property Public/Granted day:2013-07-09
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