Title:
POLYPROPYLENE-BASED FILM FOR RETORT PACKAGING, AND LAMINATE
Document Type and Number:
WIPO Patent Application WO/2023/233685
Kind Code:
A1
Abstract:
The present invention provides, as a sealant for a packaging bag, a polypropylene-based film that has excellent heat-sealability, low-temperature impact resistance, blocking resistance, and anti-orange peel surface properties, and that can be suitably used in a laminate for retort-packaged foodstuff that is to be heated in a microwave oven. This polypropylene-based film is for retort packaging. In the polypropylene-based film, the limiting viscosity [η]CXS of a portion CXS soluble to 20°C xylene is 2.0-3.0 dl/g, the amount of the xylene soluble portion CXS is 10.0-15.5 mass%, the limiting viscosity [η] CXIS of a 20°C-xylene insoluble portion is 1.4-2.5 dl/g, the difference Δ[η] ([η]CXS-[η]CXIS) in limiting viscosities of the xylene soluble portion and the xylene insoluble portion is in a range of 0.1-0.5, and the average of the Young's moduli of the film in the machine direction (MD) and the traverse direction (TD) in a -10°C atmosphere is 800-1300 MPa.
Inventors:
YASUOKA RYO (JP)
TOKUDA HIROTADA (JP)
TOYOSHIMA YUTAKA (JP)
TOKUDA HIROTADA (JP)
TOYOSHIMA YUTAKA (JP)
Application Number:
PCT/JP2022/043718
Publication Date:
December 07, 2023
Filing Date:
November 28, 2022
Export Citation:
Assignee:
TORAY ADVANCED FILM CO LTD (JP)
International Classes:
C08J5/18; B32B27/32; B65D65/40
Domestic Patent References:
| WO2019189486A1 | 2019-10-03 |
Foreign References:
| JP2000186159A | 2000-07-04 | |||
| JP2002069211A | 2002-03-08 | |||
| JPH09221521A | 1997-08-26 | |||
| JP2011037454A | 2011-02-24 | |||
| JP2012172124A | 2012-09-10 | |||
| JP2020175652A | 2020-10-29 | |||
| JP2021055050A | 2021-04-08 | |||
| US20150086739A1 | 2015-03-26 |
Attorney, Agent or Firm:
FUKUOKA, Mitsuru (JP)
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