Packaging paper and method for producing the same

CN122280018APending Publication Date: 2026-06-26LAMICAN PACKAGING KUNSHAN CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LAMICAN PACKAGING KUNSHAN CO LTD
Filing Date
2024-12-25
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing paper packaging materials are insufficient in terms of barrier properties and repulping properties, making it difficult to effectively prevent moisture and gas penetration, which affects food freshness. Furthermore, the recycling and reuse of traditional plastic packaging results in resource waste.

Method used

The packaging paper adopts a layered structure, including a base paper layer, a first base coating layer, and a functional layer. The base paper layer is composed of hardwood pulp and nanocellulose. The functional layer improves the barrier performance through a vapor-deposited layer and a gas barrier layer. The coating design is optimized to reduce resource waste.

Benefits of technology

Paper packaging materials with high barrier properties can effectively prevent water vapor and oxygen penetration, and maintain good reusability during the repulping process. They are environmentally friendly and low in cost.

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Abstract

This application provides a packaging paper and its preparation method. The packaging paper includes a base paper layer, a first base coating layer, and a functional layer stacked sequentially. The base paper layer contains hardwood pulp and nanocellulose, with the hardwood pulp comprising 50-100% of the content. The nanocellulose has a diameter of 3-100 nanometers, an aspect ratio of 5-100, and a crystallinity greater than or equal to 56%. The first base coating layer includes fillers and binders. The packaging paper provided in this application, through optimized paper and coating formulations and structural design, prepares a high-barrier, re-pulpable coated paper, which has advantages such as environmental friendliness and low cost.
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