Title:
MULTILAYERED FILM
Document Type and Number:
WIPO Patent Application WO/2024/075588
Kind Code:
A1
Abstract:
A multilayered film which comprises a base film and an aluminum oxide layer disposed on at least one side of the base film and satisfies the following requirements (A) and (B). (A) When the multilayered film is etched from the surface of the aluminum oxide layer by time-of-flight secondary ion mass spectrometry and when a position at which the intensity for a fragment ion having a mass number of 102 is 80% of a maximum intensity is taken as the boundary between the aluminum oxide layer and the base film, then the ratio between the intensity a for the mass number 102 (derived from Al2O3) and the intensity b for mass number 119 (derived from Al2O4H), b/a, is 0.10 or less. (B) When a 15-μm, biaxially stretched nylon film and a 70-μm, unstretched polypropylene film are bonded to the surface of the aluminum oxide layer with a polyurethane-based two-pack curable adhesive applied in a dry thickness of 4 μm and the laminate is aged at a temperature of 40°C for 4 days and then subjected to a wet heat treatment at 130°C for 30 minutes, then the resultant wet laminate has a strength of 1.5 N/15 mm or greater and a water vapor permeability of 2.5 g/m2·day or less.
Inventors:
YOKOTA NATSUMI (JP)
YAMAZAKI ATSUSHI (JP)
YAMAZAKI ATSUSHI (JP)
Application Number:
PCT/JP2023/034853
Publication Date:
April 11, 2024
Filing Date:
September 26, 2023
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B32B9/00; B32B27/00; B32B27/36; B32B27/40; B65D65/40
Foreign References:
| JP2020044708A | 2020-03-26 | |||
| JP2022142333A | 2022-09-30 | |||
| JP2017100392A | 2017-06-08 | |||
| JP2010201628A | 2010-09-16 | |||
| JP2020075480A | 2020-05-21 |
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
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