Biodegradable resin composition and film using the same

JP7876766B2Active Publication Date: 2026-06-22MITSUBISHI CHEM CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
MITSUBISHI CHEM CORP
Filing Date
2022-03-08
Publication Date
2026-06-22

AI Technical Summary

Technical Problem

Existing biodegradable resin compositions, such as those containing polylactic acid and aliphatic polyester resins, face challenges in film formability and tear strength, limiting their use in packaging applications.

Method used

A biodegradable resin composition comprising a biodegradable polyester resin and a lactone-modified polyvinyl alcohol resin, with specific content ratios and structural modifications, enhances tear strength without compromising biodegradability.

Benefits of technology

The composition results in films with improved tear strength and maintain biodegradability, addressing the limitations of existing resin compositions.

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Patent Text Reader

Abstract

To provide: a biodegradable resin composition with which it is possible to provide a biodegradable film that can be obtained by melt molding and has improved mechanical strength (tear strength); and a biodegradable film using the biodegradable resin composition.SOLUTION: A biodegradable resin composition contains a biodegradable polyester resin (A) and a lactone-modified polyvinyl alcohol resin (B) in which a content percentage of nyl ester unit is 15-40 mol%. A content ratio of the biodegradable polyester resin (A) and the lactone-modified polyvinyl alcohol resin (B) ((A) / (B)) is 95 / 5 to 50 / 50.SELECTED DRAWING: Figure 4
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Citation Information

Patent Citations

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    JP1996151411A

  • Plasticizer or flexibilizer for polymer and thermoplastic polymer composition

    JP1996217820A

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  • Ethylene / vinyl alcohol copolymer resin and its production

    JP1997208638A