Composite film, method for producing the same, and packaging material

CN122165727APending Publication Date: 2026-06-09CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2024-12-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing pharmaceutical packaging materials cannot effectively protect the contents from ultraviolet rays and bacteria, leading to changes or degradation of the drug's ingredients.

Method used

A composite film is prepared using multilayer co-extrusion technology, comprising an anti-UV layer, a filler layer, an adhesive layer, and a high-barrier antibacterial layer. Polyethylene and/or polypropylene are used as the raw materials for the anti-UV layer, and ethylene-vinyl alcohol copolymer and/or polyvinylidene chloride are used as the raw materials for the high-barrier antibacterial layer. The film is then melt-co-extruded using an extruder.

Benefits of technology

The prepared composite membrane has anti-UV aging and antibacterial properties, and can maintain excellent protective effect for a long time in complex environments.

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Abstract

The application relates to the technical field of composite films, and discloses a composite film, a preparation method of the composite film and a packaging material, the composite film is a composite film with a multilayer structure, and comprises an ultraviolet-resistant layer, a filling layer, a bonding layer and a high-barrier antibacterial layer; the ultraviolet-resistant layer adopts polyethylene and / or polypropylene as raw materials and a composite ultraviolet-resistant agent; the high-barrier antibacterial layer adopts a composite antibacterial agent and a barrier resin as raw materials; and the barrier resin is ethylene-vinyl alcohol copolymer and / or polyvinylidene chloride. The packaging material film prepared by adopting the composite film is soft, and has the properties of ultraviolet aging resistance and antibacterial performance.
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