Highly filled degradable EVA composite film material and preparation method thereof
By using modified inorganic fillers and synergistic degradants, a highly filled biodegradable EVA composite film was prepared, which solved the problems of high cost and difficult degradation of traditional EVA materials and achieved a balance between biodegradability and mechanical properties of the material under high filling conditions.
CN122404831APending Publication Date: 2026-07-17FUJIAN HUIYIMEI ENVIRONMENTAL PROTECTION MATERIALTECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUJIAN HUIYIMEI ENVIRONMENTAL PROTECTION MATERIALTECH CO LTD
- Filing Date
- 2026-05-08
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Traditional EVA materials are expensive and difficult to degrade. Their mechanical and processing properties drop sharply after high filling, making them difficult to widely use in the thin film field.
Method used
By employing surface-modified inorganic fillers, compatibilizers, photodegradable agents, biodegradation promoters, and photo-biodegradation synergists, along with optimized preparation processes, highly filled (30-65 parts) EVA composite films exhibit both degradability and good mechanical properties.
Benefits of technology
While maintaining good mechanical and processing properties, the material can gradually degrade in the natural environment, significantly reducing costs and meeting environmental protection requirements.
✦ Generated by Eureka AI based on patent content.
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Abstract
本发明公开了一种高填充可降解EVA复合薄膜材料及其制备方法，属于高分子材料技术领域。该材料由以下重量份组分构成：EVA树脂，无机填料，可降解助剂，相容剂，润滑剂，抗氧剂。其中，无机填料为特定粒径的改性填料，可降解助剂包含光降解剂、生物降解促进剂及光‑生物双降解协同剂。制备方法包括原料预处理、高速混合、熔融挤出造粒和流延成型，其中在熔融挤出阶段可采用侧喂料方式加入无机填料，在流延成型阶段采用多辊组梯度冷却工艺。本发明通过组分设计与工艺优化，在实现高填充以大幅降低成本的同时，保证了材料的加工性能和力学性能，并赋予了材料在自然环境下可光‑生物协同降解的特性。
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