水溶性フィルム及びその製造方法、並びに薬剤包装体

Title:

水溶性フィルム及びその製造方法、並びに薬剤包装体

Document Type and Number:

Japanese Patent JP7238769

Kind Code:

B2

Abstract:

A water-soluble film is provided, which is less susceptible to curling even after long-term storage. The water-soluble film includes a polyvinyl alcohol resin (A), and has opposite surfaces each having a crystallinity index X represented by the following expression (1) based on measurement through an infrared spectroscopic analysis by an attenuated total reflection method, wherein one of the opposite surfaces of the film has a crystallinity index Xa and the other surface of the film has a crystallinity index Xb (Xa ≥ Xb), and a difference Xa - Xb between the crystallinity indexes Xa and Xb of the opposite film surfaces is 0.015 to 0.10. X=ABS1141/ABS1093 wherein ABS₁₁₄₁ is an absorbance at a wavenumber of 1141 cm^-1, and ABS₁₀₉₃ is an absorbance at a wavenumber of 1093 cm^-1.

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Inventors:

Koichiro Nakahara
Junya Ichiki

Application Number:

JP2019517448A

Publication Date:

March 14, 2023

Filing Date:

March 28, 2019

Export Citation:

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Assignee:

Mitsubishi Chemical Corporation

International Classes:

C08J7/02

Domestic Patent References:

JP2002273791A
JP2009051947A
JP2002301899A
JP6138321A
JP2002030162A
JP2001329130A

Foreign References:

WO2017043509A1

Attorney, Agent or Firm:

Nishihiko Yasuhiko
井▲崎▼ 愛佳
Yuko Nishito
Shigeyasu Terao

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