Title:
WATER-SOLUBLE FILM, METHOD FOR PRODUCING THE SAME, AND PACKAGE
Document Type and Number:
Japanese Patent JP2023029948
Kind Code:
A
Abstract:
To provide a water-soluble film which is excellent in solubility to water, and can reduce fusion between contact surfaces at an end when stored in a roll shape, a method for producing the same, and a package using the water-soluble film.SOLUTION: A water-soluble film contains a polyvinyl alcohol resin. When crystal component amounts, which are determined from a spin-spin relaxation curve obtained when 1H pulse NMR measurement of a water-soluble film is performed after the lapses of 60 seconds and 180 seconds immediately after the water-soluble film has been immersed in a mixed solution at 5°C where heavy water and heavy methanol are mixed in a volume ratio of 1:1, are represented by (A1)0, (A1)60 and (A1)180, the following expression (1) is satisfied: 0.2<(A1)60/(A1)0<0.6 and (A1)180/(A1)0<(A1)60/(A1)0.SELECTED DRAWING: Figure 1
Inventors:
Minoru Okamoto
Sayaka Shimizu
Futo Osamu
Sayaka Shimizu
Futo Osamu
Application Number:
JP2022193208A
Publication Date:
March 07, 2023
Filing Date:
December 02, 2022
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C08J5/18; B65D65/46
Attorney, Agent or Firm:
Shinji Komai