Title:
MULTILAYER FILM, LID MATERIAL FOR FOOD PACKAGING CONTAINER, AND FOOD PACKAGING CONTAINER
Document Type and Number:
WIPO Patent Application WO/2023/176850
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a multilayer film which is excellent in terms of all of anti-fogging properties, easy-opening properties, impact resistance, and environmental friendliness. The multilayer film has at least two layers: a substrate layer; and an anti-fogging layer, wherein (a) the heat seal strength at each temperature of 120°C, 140°C, 160°C, and 180°C is 2.0-12.0 N/15 mm, (b) the water contact angle under the conditions of 5°C and 50% RH is 50° or less, (c) the peel strength between the anti-fogging layer surface and the substrate layer surface of the multilayer film is 1 N/15 mm or less, (d) the impact strength at 5°C is 0.5 J or more, (e) the thickness unevenness of the multilayer film is 10% or less in both the MD direction and the TD direction, (f) the substrate layer of the multilayer film contains a recycled polyester resin, and the amount of isophthalic acid relative to the total dicarboxylic acid units is 0.5-3.2 mol%.
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Inventors:
TAMARI NOBORU (JP)
GOTO TAKAMICHI (JP)
GOTO TAKAMICHI (JP)
Application Number:
PCT/JP2023/009930
Publication Date:
September 21, 2023
Filing Date:
March 14, 2023
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B32B27/36; B32B27/00; B32B27/18; B65D65/40; C08J7/054
Domestic Patent References:
| WO2019064973A1 | 2019-04-04 | |||
| WO2021111941A1 | 2021-06-10 |
Foreign References:
| JP2013060021A | 2013-04-04 | |||
| JP2020073627A | 2020-05-14 | |||
| JP2020510708A | 2020-04-09 |
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