Title:
LAMINATED FILM AND PACKAGING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/030361
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a laminated film that can form a laminated structure composed mainly of a polypropylene film and composed of almost a single resin type having a low environmental load, the laminated film having required performance such as gas barrier properties or adhesiveness required for packaging materials, as well as processing suitability. In order to solve the problem, the present invention provides a laminated film in which a coating layer having a polyvinyl alcohol-based copolymer and an inorganic layered compound is provided on at least one surface of the base film, the laminated film satisfying requirements (a) to (d) below. (a) The base film is a stretched film using a propylene-based resin. (b) The coating weight of the coating layer is 0.10 g/m2 to 0.50 g/m2. (c) In a total reflection infrared absorption spectrum of the laminated film, the ratio (P1/P2) of a peak intensity (P1) having an absorption maximum in a region of 1040±10cm-1 to a peak intensity (P2) having an absorption maximum in a region of 3300±10cm-1 is within the range of 3.0-25.0. (d) The arithmetic mean roughness in 2 square μm of the coating layer on the laminated film is within the range of 2.0-8.0 nm.
Inventors:
YAMAZAKI ATSUSHI (JP)
IWATA DAISUKE (JP)
YAMAGUCHI YUYA (JP)
IWATA DAISUKE (JP)
YAMAGUCHI YUYA (JP)
Application Number:
PCT/JP2021/028150
Publication Date:
February 10, 2022
Filing Date:
July 29, 2021
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B32B27/30; B32B27/20; B65D65/40
Foreign References:
| JPH0693133A | 1994-04-05 | |||
| JPH11151786A | 1999-06-08 | |||
| JP2001009983A | 2001-01-16 | |||
| JP2005225140A | 2005-08-25 | |||
| JP2003268183A | 2003-09-25 | |||
| JP2000052501A | 2000-02-22 | |||
| JP2003231221A | 2003-08-19 | |||
| JP2006095782A | 2006-04-13 | |||
| JP2005035167A | 2005-02-10 |
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