Title:
MULTILAYERED STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2010/134530
Kind Code:
A1
Abstract:
Provided is a multilayered structure that can make full use of the excellent oxygen-barrier properties of an ethylene/vinyl-alcohol copolymer without the provision of a separate adhesive layer, and can be effectively applied even when a polyolefin resin is used for inner and outer layers. The multilayered structure is provided with an adhesive middle layer between inner and outer layers, said adhesive middle layer comprising a blend of an ethylene/vinyl-alcohol copolymer (A) and a maleic anhydride modified olefin resin (B) mixed using a weight ratio between 4:6 and 8:2. The phase structure of the adhesive middle layer is either a sea-island structure with the maleic anhydride modified olefin resin (B) as the sea, or a bicontinuous phase. Using a scanning electron microscope to take a cross-sectional micrograph across the thickness of the multilayered structure, and using image-analysis software to quantify the contrast distribution in the neighborhood of phase boundaries between the ethylene/vinyl-alcohol copolymer (A) and the maleic anhydride modified olefin resin (B) in the adhesive middle layer, the standard deviation is at least 65.
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Inventors:
ISHIHARA TAKAYUKI (JP)
KIKUCHI ATSUSHI (JP)
KIKUCHI ATSUSHI (JP)
Application Number:
PCT/JP2010/058376
Publication Date:
November 25, 2010
Filing Date:
May 18, 2010
Export Citation:
Assignee:
TOYO SEIKAN KAISHA LTD (JP)
ISHIHARA TAKAYUKI (JP)
KIKUCHI ATSUSHI (JP)
ISHIHARA TAKAYUKI (JP)
KIKUCHI ATSUSHI (JP)
International Classes:
B32B27/28; B32B27/32
Foreign References:
| JP2003192016A | 2003-07-09 | |||
| JP2002241546A | 2002-08-28 | |||
| JP2004182344A | 2004-07-02 | |||
| JP2004010679A | 2004-01-15 | |||
| JP2005119693A | 2005-05-12 | |||
| JP2007320576A | 2007-12-13 | |||
| JP3788442B2 | 2006-06-21 |
Other References:
See also references of EP 2433794A4
Attorney, Agent or Firm:
ONO, Hisazumi et al. (JP)
Ono Pure in addition (JP)
Ono Pure in addition (JP)
Download PDF:
Claims: