Biodegradable film using calcium carbonate extracted from oyster shell and method for preparing the same

By extracting high-purity calcium carbonate from oyster shells to prepare biodegradable films, the problem of oyster shell pollution has been solved, enabling resource reuse and the development of environmentally friendly packaging materials, and improving the performance and degradability of the films.

CN122138996APending Publication Date: 2026-06-02NEURAL PACKAGING LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NEURAL PACKAGING LTD
Filing Date
2024-10-30
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies have failed to effectively utilize oyster shell resources, leading to them becoming a serious source of pollution. Furthermore, there is no literature documenting a scheme for extracting calcium carbonate from oyster shells to prepare biodegradable films.

Method used

By extracting high-purity calcium carbonate from oyster shells and mixing it with biodegradable resin to prepare biodegradable films, additional pretreatment processes were avoided, improving the purity of calcium carbonate and the mechanical properties of the films.

Benefits of technology

The prepared biodegradable film reduces the amount of plastic used, improves film performance, reduces carbon dioxide emissions, and transforms industrial waste into resources, exhibiting excellent biodegradability and environmental benefits.

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Abstract

This invention relates to a method for preparing a biodegradable film using calcium carbonate extracted from oyster shells, and the biodegradable film prepared therefrom. According to this invention, by applying the biodegradable film in the preparation of packaging paper, bags, etc., which require biodegradability, the amount of plastic used can be significantly reduced, achieving eco-friendliness, while oyster shells, which are treated as industrial waste or discarded, can be utilized as a resource.
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