Preparation method of antibacterial plastic food packaging box

By using a synergistic process of modified nanosilver solution and multiple additives in food packaging boxes, the problems of poor antibacterial effect and health and environmental hazards of existing plastic packaging boxes have been solved, and efficient, safe antibacterial performance and environmentally friendly production have been achieved.

CN120680676AInactive Publication Date: 2025-09-23SHANDONG RUNPING PLASTIC IND CO LTD
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Patent Information

Application Number
CN202511183999.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-22
Publication Date
2025-09-23
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing plastic food packaging boxes have poor antibacterial effects and may cause harm to health and the environment.

Method used

A mixture of polypropylene particles and an antibacterial agent, a compatibilizer, an antioxidant, a light stabilizer, a heat stabilizer and a dispersant is melt-blended through a twin-screw extruder to produce antibacterial polypropylene particles, and a modified nano-silver solution is adsorbed by vacuum and high pressure to form an antibacterial layer on the surface of the packaging box.

Benefits of technology

It significantly improves the antibacterial performance of the packaging box, reduces the risk of harmful substance migration, increases the reuse rate, and has strong process compatibility, lowers the production threshold, and is both environmentally friendly and economical.

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Abstract

The invention discloses a preparation method of an antibacterial plastic food packaging box, and relates to the technical field of high polymer materials, and the preparation method comprises the following specific steps: S1, preparing antibacterial plastic particles, the preparation method comprises the following steps: S1, pre-mixing 700-1000 parts of polypropylene particles with 5-10 parts of a bacteriostatic agent, 10-15 parts of a compatilizer, 5-10 parts of an antioxidant, 5-10 parts of a light stabilizer, 5-15 parts of a heat stabilizer, 5-10 parts of a dispersing agent and 5-15 parts of a slow-release agent in proportion, then carrying out melt blending and extrusion granulation through a double-screw extruder, and cooling to obtain bacteriostatic polypropylene particles, and S2, manufacturing the bacteriostatic food packaging box. In the first step and the second step, after nitrogen is injected through an anti-static vacuum high-pressure stirring machine, polypropylene particles, a bacteriostatic agent, a compatilizer, an antioxidant, a light stabilizer, a heat stabilizer, a dispersing agent and a slow release agent are premixed, and the main advantage is that oxygen is isolated through the inertia characteristic of nitrogen, and oxidative deterioration of materials is prevented.
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