Title:
POLYPROPYLENE-BASED FILM FOR RETORT PACKAGING, AND LAYERED BODY
Document Type and Number:
WIPO Patent Application WO/2024/009724
Kind Code:
A1
Abstract:
The present invention provides a polypropylene-based film that, as a sealant for packaging bag, has extremely excellent heat-sealing properties and low-temperature impact resistance and that can also be favorably used in retort applications due to excellent blocking resistance and peeling resistance. The present invention is a polypropylene-based film for retort packaging for which: the limiting viscosity [η]CXS of a 20°C xylene-soluble portion CXS of the film is at least 2.5 dL/g and no more than 3.0 dL/g; the amount of the 20°C xylene-soluble portion CXS is no more than 15% by mass; the limiting viscosity [η]CXIS of a 20°C xylene-insoluble portion CXIS is at least 1.6 dL/g and no more than 2.2 dL/g; the limiting viscosity difference Δ[η]([η]CXS − [η]CXIS) of the 20°C xylene-soluble portion CXS and the 20°C xylene-insoluble portion CXIS is at least 0.7 and less than 1.2; and the mean value of the Young's modulus of the film in a vertical direction (MD) and a horizontal direction (TD) in a −10°C atmosphere is less than 1000 MPa.
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Inventors:
TOKUDA HIROTADA (JP)
CHUJO KAZUKI (JP)
TOYOSHIMA YUTAKA (JP)
YASUOKA RYO (JP)
CHUJO KAZUKI (JP)
TOYOSHIMA YUTAKA (JP)
YASUOKA RYO (JP)
Application Number:
PCT/JP2023/022266
Publication Date:
January 11, 2024
Filing Date:
June 15, 2023
Export Citation:
Assignee:
TORAY ADVANCED FILM CO LTD (JP)
International Classes:
C08J5/18; B32B27/32; B65D65/40; B65D81/34
Foreign References:
| JP2020175652A | 2020-10-29 | |||
| JP2015171778A | 2015-10-01 | |||
| JP2012172124A | 2012-09-10 | |||
| JP2015168151A | 2015-09-28 | |||
| JP2002069211A | 2002-03-08 | |||
| JP2000119480A | 2000-04-25 | |||
| JPH11255980A | 1999-09-21 | |||
| JP2000007731A | 2000-01-11 | |||
| JPH09221521A | 1997-08-26 | |||
| JP2003268173A | 2003-09-25 |
Attorney, Agent or Firm:
FUKUOKA Mitsuru (JP)
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