Recyclable high-barrier packaging film and preparation method thereof

By using a barrier layer with modified hexagonal boron nitride and a multi-layer composite structure in the packaging film, the existing high-barrier packaging film is solved, and the high barrier, mechanical properties and antibacterial properties are improved, and it is convenient to recycling and utilization.

CN119682346AActive Publication Date: 2025-03-25HUNAN GREAT WALL MINGTAI NEW MATERIAL TECH CO LTD
7 Cites 1 Cited by

Patent Information

Application Number
CN202510192909.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-21
Publication Date
2025-03-25
Estimated Expiration
2045-02-21

AI Technical Summary

Technical Problem

The existing high-barrier packaging films are prone to deform, break, and delaminate under heat or external force, which damages its barrier properties and is difficult to recycle and have a low recycling rate.

Method used

A multi-layer composite structural packaging film including an outer substrate layer, a barrier layer of modified hexagonal boron nitride as filler and an inner substrate layer is prepared by coextrusion blow molding and bidirectional stretching processes, and finally corona or flame treatment is carried out to improve the mechanical properties and barrier properties of the film.

Benefits of technology

It has achieved the improvement of high barrier properties, mechanical properties and antibacterial properties. At the same time, due to the ease of separation between layers, it is convenient for recycling, which is conducive to environmental protection and saves resources.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention belongs to the technical field of packaging films, and provides a recoverable high-barrier packaging film and a preparation method thereof.The recoverable high-barrier packaging film comprises an outer base material layer, a barrier layer and an inner base material layer from outside to inside; the barrier layer is prepared from the following raw materials in parts by weight: 60 to 75 parts of ethylene-vinyl alcohol copolymer, 10 to 13 parts of polyvinyl alcohol, 2 to 5 parts of modified hexagonal boron nitride, 2 to 3 parts of maleic anhydride grafted polypropylene, 0.5 to 0.6 part of plasticizer and 0.01 to 0.1 part of antioxidant; the preparation method of the modified hexagonal boron nitride comprises the following steps: adding hexagonal boron nitride into an ethanol aqueous solution, heating to 65-70 DEG C in a nitrogen atmosphere, carrying out reflux stirring, adding modified sodium lignin sulfonate, adjusting the pH value, continuing reflux stirring, cooling to room temperature, washing, filtering, and drying until the weight is constant to obtain the modified hexagonal boron nitride. The recyclable high-barrier packaging film prepared by the invention has excellent barrier property, mechanical property and antibacterial property.
Need to check novelty before this filing date? Find Prior Art