High-toughness nano-modified EVA (Ethylene Vinyl Acetate) plastic particle and preparation method thereof

By constructing a biomimetic mineralization pathway in the EVA matrix and introducing organic template molecules and nano-inorganic phases to form a multi-scale interwoven network structure, the problem of nanoparticle aggregation is solved, and the synergistic improvement of high toughness and high strength is achieved, which is suitable for high-end applications such as shoe materials and photovoltaic encapsulation films.

CN122167873APending Publication Date: 2026-06-09FUJIAN YUANLU ENERGY SAVING TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202610583358.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-29
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing technologies, nanoparticles tend to agglomerate in EVA matrices, making it difficult to synergistically improve the material's strength and toughness. Traditional blending strategies have failed to effectively address the distribution problem of nanoparticles across multiple scales.

Method used

By constructing a biomimetic mineralization pathway within the EVA matrix and introducing organic template molecules with specific structures, nano-calcium carbonate or calcium phosphate is deposited in situ in an ordered gradient manner to form a multi-scale interpenetrating network structure, thereby suppressing stress concentration and improving the overall mechanical properties of the material.

Benefits of technology

It significantly improves the fracture toughness and impact resistance of the material, optimizes the overall mechanical properties of the material, simplifies the formulation system, and has good prospects for industrialization.

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Abstract

The invention belongs to the technical field of high polymer materials, and discloses a high-toughness nano-modified EVA plastic particle and a preparation method thereof. The plastic particle is composed of an EVA matrix, organic template molecules and nano calcium carbonate or calcium phosphate generated in situ, wherein the organic template molecules guide inorganic phases to be distributed in the matrix in a gradient manner and form a brick-mud staggered structure. Through in-situ mineralization and shear field regulation and control in a twin-screw extrusion process, ordered arrangement and strong interface coupling of nanophase are realized. The problem of agglomeration of nano particles in EVA melt is solved, the fracture toughness and impact resistance of the material are improved, the overall mechanical property matching of the material is optimized, a formula system is simplified, a compatilizer or a coupling agent does not need to be additionally added, the material is compatible with existing EVA processing equipment, complex post-treatment is not needed, and the material has a good industrialization prospect; the obtained material has high tensile strength, high elongation at break and excellent impact toughness.
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