Title:
WATER-SOLUBLE FILM, METHOD OF MANUFACTURING SAME, AND PACKAGE
Document Type and Number:
WIPO Patent Application WO/2020/138438
Kind Code:
A1
Abstract:
[Problem] To provide: a water-soluble film with which package deformation while in storage is small while superior solubility in water is maintained, and which can inhibit the occurrence of tearing etc.; a method of manufacturing the same; and a package using the water-soluble film. [Solution] This water-soluble film contains a polyvinyl alcohol resin. When a 1H pulse NMR measurement of the water-soluble film is performed in heavy methanol, the crystal component amount (A1) found from a spin-spin relaxation curve obtained from the measurement is 60% or less, and a restricted amorphous component amount (A2) is 10-50%. The ratio (A1/A2) of the crystal component amount (A1) and the restricted amorphous component amount (A2) is preferably 0.1-5.
Inventors:
OKAMOTO MINORU (JP)
SHIMIZU SAYAKA (JP)
KAZETO OSAMU (JP)
SHIMIZU SAYAKA (JP)
KAZETO OSAMU (JP)
Application Number:
PCT/JP2019/051487
Publication Date:
July 02, 2020
Filing Date:
December 27, 2019
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B29C41/12; B65D65/46; C08J5/18
Domestic Patent References:
WO2015020046A1 | 2015-02-12 | |||
WO2018123894A1 | 2018-07-05 | |||
WO2016190235A1 | 2016-12-01 | |||
WO2016084836A1 | 2016-06-02 | |||
WO2018199140A1 | 2018-11-01 | |||
WO2018230583A1 | 2018-12-20 |
Foreign References:
JP2018028662A | 2018-02-22 | |||
JP2002020506A | 2002-01-23 | |||
JP2002059475A | 2002-02-26 |
Other References:
See also references of EP 3904034A4
Attorney, Agent or Firm:
KOMAI Shinji et al. (JP)
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