Environment-friendly lining paper and preparation method thereof

By high-pressure homogenization and cross-linking treatment of nanofibrillated cellulose and pulp, combined with cationic lignin sulfonate and nano-montmorillonite, and surface coating with acetylated hemicellulose, the recycling problem and insufficient barrier properties of existing cigarette inner lining paper are solved, and environmentally friendly inner lining paper with high tensile strength and excellent barrier properties is achieved.

CN121344977AActive Publication Date: 2026-01-16JIANGSU JIAYI PACKAGING TECH CO LTD
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Patent Information

Application Number
CN202511668559.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-14
Publication Date
2026-01-16
Estimated Expiration
2045-11-14

AI Technical Summary

Technical Problem

Existing cigarette liner paper suffers from problems such as difficulty in recycling aluminum foil composite paper, poor barrier performance, and high energy consumption. Traditional bio-based coated paper has reduced barrier performance under high humidity, making it difficult to meet the tensile strength requirements of high-speed packaging.

Method used

The process involves mixing nanofibrillated cellulose with pulp and then homogenizing under high pressure. This is combined with crosslinking of cationic lignin sulfonate, nano-montmorillonite, and glyoxal to construct a dense network internally. The surface is then coated with acetylated hemicellulose to form a dense coating, resulting in a functional gradient structure.

Benefits of technology

It significantly improves the tensile strength and barrier properties of paper, achieving efficient water vapor barrier and aroma retention, and meets environmental protection requirements.

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Abstract

The invention relates to the technical field of cigarette packaging materials, in particular to environment-friendly lining paper and a preparation method thereof. The problem that the environment-friendly lining paper is insufficient in tensile strength and barrier property is solved. Paper pulp fibers are compounded with nano fibrillated cellulose and homogenized under high pressure, cationized lignosulfonate and nano montmorillonite slurry are compounded in homogenized slurry, glyoxal is used for in-situ crosslinking, and an internal'brick-mud 'bionic barrier structure is constructed; after the paper sheet is formed, the surface of the paper sheet is coated with an acetylation modified hemicellulose blocking agent, thermocuring is carried out, a gradient structure is constructed cooperatively, the tensile strength, the water vapor blocking property and the aroma blocking property of the lining paper are improved, and the used raw materials are derived from biomass and natural minerals and are green and environment-friendly.
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