Title:
SURFACE TREATMENT METHOD, FILM, AND PACKAGING BAG USING SAME
Document Type and Number:
WIPO Patent Application WO/2022/004186
Kind Code:
A1
Abstract:
The present invention makes it possible to obtain a flatter roll film when performing a surface treatment that imparts heat sealability to a stretched polyester film. A surface treatment method according to the present invention irradiates a stretched polyester film entirely or partly with an infrared-wavelength laser beam, forming a heat seal precursor. The surface treatment method is characterized in that the variation in scanning energy density distribution in the irradiation range of the laser beam is from 0 J/cm3 to less than 100 J/cm3.
Inventors:
AKAHANE TAKAHIRO (JP)
YUASA YOSHIYUKI (JP)
OHASHI KAZUAKI (JP)
YUASA YOSHIYUKI (JP)
OHASHI KAZUAKI (JP)
Application Number:
PCT/JP2021/019237
Publication Date:
January 06, 2022
Filing Date:
May 20, 2021
Export Citation:
Assignee:
TOYO SEIKAN GROUP HOLDINGS LTD (JP)
International Classes:
C08J7/00; B23K26/356; B29C59/16; B29C65/02; B32B15/09; B65D65/02
Foreign References:
| JP2020037219A | 2020-03-12 | |||
| JP2018188593A | 2018-11-29 | |||
| JP2018030243A | 2018-03-01 | |||
| JPH10139900A | 1998-05-26 | |||
| JP2016056231A | 2016-04-21 |
Attorney, Agent or Firm:
EICHI PATENT & TRADEMARK CORP. (JP)
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