Title:
LAYERED FILM
Document Type and Number:
WIPO Patent Application WO/2022/176630
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a layered film formed by including, on a substrate film layer in which a polyester resin is used, an inorganic thin film layer and a protective layer in that order, the layered film having outstanding moist heat resistance, alcohol resistance, film production recoverability, and barrier anisotropy, and also having outstanding recyclability which allows the layered film and a sealant layer to be simply peeled away from a laminated layered body. The solution is a layered film that comprises an inorganic thin film layer on at least one side of a substrate film, and comprises, on the inorganic thin film layer, a protective layer that contains a urethane resin with a meta-xylylene base, the layered film being characterized by satisfying the following requirements (a)–(d). (a) No covering layer is layered between the substrate film and the inorganic thin film layer. (b) The ratio B/A of the water vapor transmission rate B of the protective layer when water vapor passes through from the protective layer side, to the water vapor transmission rate A thereof when water vapor passes through from the substrate film side, at 40°C and 90% RH, is 2.0 or less. (c) The ratio (P2/P1) of the peak intensity (P2) with an absorption maximum in the 1530±10cm-1 range on the surface of the protective layer after the layered film is immersed for ten minutes in 95°C hot water and then a tape is affixed to and then peeled away from the surface of the protective layer, to the peak intensity (P1) with an absorption maximum in the 1530±10/cm-1 range on the total reflection infrared absorption spectrum of the protective layer, is at least 0.7. (d) The ratio (P2/P1) of the peak intensity (P2) with an absorption maximum in the 1530±10/cm-1 range on the surface of the protective layer after the layered film is immersed for one hour in 99% ethanol and then a tape is affixed to and then peeled away from the surface of the protective layer, to the peak intensity (P1) with an absorption maximum in the 1530±10/cm-1 range on the total reflection infrared absorption spectrum of the protective layer, is at least 0.7.
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Inventors:
YAMAZAKI ATSUSHI (JP)
Application Number:
PCT/JP2022/004238
Publication Date:
August 25, 2022
Filing Date:
February 03, 2022
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B32B9/00; B32B7/02; B32B27/40; C09K3/00
Domestic Patent References:
| WO2015016069A1 | 2015-02-05 | |||
| WO2016136768A1 | 2016-09-01 | |||
| WO2019187970A1 | 2019-10-03 |
Foreign References:
| JP2019085511A | 2019-06-06 | |||
| JP2000167973A | 2000-06-20 | |||
| JP5560708B2 | 2014-07-30 | |||
| JP2000043182A | 2000-02-15 |
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