Degradable anti-adherent film and preparation method thereof

By using materials such as polyadipate and polylactic acid and compatibilizers to prepare biodegradable anti-stick membranes, the environmental pollution problem of non-degradable isolation membranes is solved. The membranes decompose into carbon dioxide and water in the natural environment and have good mechanical properties and construction adaptability, thus meeting the green upgrading needs of the building waterproofing field.

CN122125991APending Publication Date: 2026-06-02UPASS MATERIAL TECH JIANGSU
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Patent Information

Application Number
CN202610512633.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-17
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The non-degradable release membrane of existing bitumen-based waterproof membranes is difficult to recycle after construction, and long-term residues in the environment lead to microplastic pollution. In addition, existing biodegradable release membranes have problems such as poor barrier performance, insufficient mechanical strength or excessive cost, making it difficult to meet actual needs.

Method used

A biodegradable anti-stick film is prepared by using materials such as polyadipate, polylactic acid, and polybutylene butyrate as the main components, adding compatibilizers and dual-anti-adhesive masterbatch, and preparing the film by screw extrusion granulation and casting. A UV-curable release coating is then applied to the surface layer to improve compatibility and mechanical properties.

Benefits of technology

It enables the biodegradable anti-stick membrane to gradually decompose into carbon dioxide and water in the natural environment, solving the environmental pollution problem. At the same time, it has good mechanical properties and construction adaptability, meeting the green upgrade needs of the building waterproofing field.

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Abstract

The invention relates to a degradable anti-adherent film and a preparation method thereof.The degradable anti-adherent film comprises a surface layer, a middle layer and a bottom layer which are sequentially arranged, the surface layer comprises polyadipic acid, polylactic acid, polybutyric acid butanediol ester, a compatilizer, a chain extender and a double-resistant master batch, and the middle layer comprises polyadipic acid, polyglycolic acid, polybutyric acid butanediol ester, a compatilizer, a chain extender and a double-resistant master batch; the bottom layer comprises polyadipic acid, polylactic acid, polybutyric acid butanediol ester, a compatilizer, a chain extender and a double-resistant master batch. The degradable anti-sticking film has the advantages that the compatilizer is added into the components of each layer, so that the compatibility of the raw materials is improved, and the brittleness of the degradable anti-sticking film is reduced; the double-resistant master batch of the PBAT carrier is added to each layer, so that the degradation rate of the degradable anti-adherent film is controlled; by regulating and controlling the blending ratio of the components of each layer, the mechanical property, the processing fluidity and the biodegradability of the degradable anti-sticking film are improved; and the surface layer is coated with a layer of UV photocuring release coating, so that the construction operation requirements of the degradable anti-sticking film are ensured.
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