Title:
FILM FOR HEAT SEALING, AND PACKAGING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2021/215507
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: a film for heat sealing that has exceptional recycling properties and makes it possible to reduce the load on the environment, the film for heat sealing obtaining high heat seal strength in a short crimping time, and furthermore having heat resistance against a retort process at high temperature; and a packaging material. This film (10) for heat sealing is such that a thermoplastic polyester resin layer (12) that contains a thermoplastic polyester resin including polyoxyalkylene glycol as a diol component is provided on one or both sides of a substrate layer (11), wherein the film (10) is characterized in that: after the thermoplastic polyester resin is fused and then rapidly cooled to -50°C at a rate of 200°C/min, the glass transition temperature (Tg) of the thermoplastic polyester resin observed upon heating at a rate of 10°C/min is 50°C or less; a melting point (Tm) of 150°C or higher is observed; and the heat of fusion ΔH is greater than 0 J/g and no greater than 20 J/g.
Inventors:
ITOH YOSHIMI (JP)
KAWAMURA SATOSHI (JP)
SATOU YUUTO (JP)
FUNAOKA SHINICHIROU (JP)
KAWAMURA SATOSHI (JP)
SATOU YUUTO (JP)
FUNAOKA SHINICHIROU (JP)
Application Number:
PCT/JP2021/016331
Publication Date:
October 28, 2021
Filing Date:
April 22, 2021
Export Citation:
Assignee:
TOYO SEIKAN KAISHA LTD (JP)
International Classes:
B32B27/00; B32B27/36; B65D65/40; C08G63/66; C08L67/02
Domestic Patent References:
| WO2018153795A1 | 2018-08-30 |
Foreign References:
| JPS51131582A | 1976-11-16 | |||
| JPH03120044A | 1991-05-22 | |||
| JP2008538093A | 2008-10-09 | |||
| JPS5242545A | 1977-04-02 |
Other References:
NIESTEN MEIKE CATHARINA ELISABETH JOSEPHINA: "POLYETHER BASED SEGMENTED COPOLYMERS WITH UNIFORM ARAMID UNITS", THESIS UNIVERSITY OF TWENTE, ENSCHEDE, 1 June 2000 (2000-06-01), pages 143, 145, XP055867957, [retrieved on 20211201]
KOBAYASHI: "Thermal Character of Polyester Elastomers", KOBUNSHI RONBUNSHU, 1 January 1992 (1992-01-01), pages 687 - 696, XP055867978, Retrieved from the Internet [retrieved on 20211201]
KOBAYASHI: "Thermal Character of Polyester Elastomers", KOBUNSHI RONBUNSHU, 1 January 1992 (1992-01-01), pages 687 - 696, XP055867978, Retrieved from the Internet
Attorney, Agent or Firm:
FUJIMOTO Nobuo et al. (JP)
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