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A kind of high-performance moisture-proof paper and its preparation method and application

A moisture-proof paper, high-performance technology, used in papermaking, paper coatings, textiles and papermaking, etc., can solve the problems of being easily affected by external humidity conditions, increase production costs, and limit paper performance, and increase added value and market. Competitiveness, simplification of the production process, the effect of reducing production costs

Active Publication Date: 2017-10-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For ordinary paper, its main component is plant fiber. At the same time, the paper has a void structure and the fibers are bonded to each other through hydrogen bonds, so it is easily affected by the external humidity conditions, so that the performance of the paper is limited by the external conditions.
The production cost of the traditional coating process is relatively high, and most of them are carried out with specific equipment. It is of great significance to produce paper with high moisture-proof performance without changing the existing production section by using traditional paper-making equipment.
At the same time, the coating has high requirements on the surface characteristics of the base paper itself, which also restricts its application and increases the production cost.

Method used

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  • A kind of high-performance moisture-proof paper and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0023] A preparation method of high-performance moisture-proof paper, comprising the steps of:

[0024] (1) Soak the polyvinyl alcohol in cold water for 3 hours, then dilute to a mass concentration of 7.0%, stir at a speed of 500r / min, heat up the steam to 90°C for boiling, keep it warm for 1.5 hours, then dilute with water to a mass concentration of 2% , kept at 70°C to obtain a polyvinyl alcohol solution;

[0025] (2) Mix 10% styrene acrylate (SAE) relative to the mass of polyvinyl alcohol and 30% vinyl acetate-ethylene copolymer emulsion (EVA) relative to the mass of polyvinyl alcohol with the polyvinyl alcohol solution, and then add glue Adhesives and strengthening agents are formulated into sizing materials; wherein the adhesive is alkyl ketene dimer (AKD), relative to the absolute dry weight of pulp, the dosage is 2%, and the reinforcing agent is polyamide polyamine epichlorohydrin, relative to pulp Absolutely dry mass, the dosage is 1%;

[0026] (3) Sizing the prepare...

Embodiment 2

[0029] A preparation method of high-performance moisture-proof paper, comprising the steps of:

[0030] (1) Soak the polyvinyl alcohol in cold water for 4 hours, then dilute it to a mass concentration of 7.0%, stir at a speed of 600r / min, heat the steam to 92°C, keep it warm for 2 hours, then dilute it with water to a mass concentration of 2.5% , kept at 73°C to obtain a polyvinyl alcohol solution;

[0031] (2) Mix 12% styrene acrylate (SAE) relative to the mass of polyvinyl alcohol and 35% vinyl acetate-ethylene copolymer emulsion (EVA) relative to the mass of polyvinyl alcohol with the polyvinyl alcohol solution, and then add glue Adhesives and strengthening agents are formulated into sizing materials; wherein the adhesive is alkyl ketene dimer (AKD), relative to the absolute dry weight of pulp, the dosage is 4%, and the strengthening agent is polyamide polyamine epichlorohydrin, relative to pulp Absolutely dry mass, the dosage is 2%;

[0032] (3) Sizing the prepared sizin...

Embodiment 3

[0035] A preparation method of high-performance moisture-proof paper, comprising the steps of:

[0036] (1) Soak the polyvinyl alcohol in cold water for 4 hours, then dilute it to a mass concentration of 7.5%, stir at a speed of 700r / min, heat the steam to 94°C, keep it warm for 2.5 hours, then dilute it with water to a mass concentration of 3.0% , kept at 77°C to obtain a polyvinyl alcohol solution;

[0037] (2) Mix 13% styrene acrylate (SAE) relative to the mass of polyvinyl alcohol and 40% vinyl acetate-ethylene copolymer emulsion (EVA) relative to the mass of polyvinyl alcohol with the polyvinyl alcohol solution, and then add glue Adhesives and reinforcing agents are formulated into sizing materials; wherein the adhesive is alkyl ketene dimer (AKD), relative to the absolute dry weight of pulp, the dosage is 6%, and the reinforcing agent is polyamide polyamine epichlorohydrin, relative to pulp Absolutely dry mass, the dosage is 4%;

[0038] (3) Sizing the prepared sizing ...

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Abstract

The invention belongs to the technical field of preparation of special paper, and particularly relates to high-performance moisture-proof paper and a preparation method and an application thereof. The preparation method comprises the following steps: using an alkyl ketene dimmer as an adhesive in an amount of 2-8 percent based on the absolute dry mass of paper pulp; using polyamide amine epoxy chloropropane as an enhancer in an amount of 0-5 percent based on the absolute dry mass of the paper pulp to perform internal sizing; preparing a polyvinyl alcohol solution, adding styrene acrylic ester in an amount of 10-15 percent based on the mass of the polyvinyl alcohol and vinyl acetate-ethylene copolymer emulsion in an amount of 30-50 percent based on the mass of the polyvinyl alcohol, mixing, and adding the adhesive and the enhancer to prepare a sizing material; sizing the prepared sizing material on the surface of a paper machine through a sizing material to obtain the high-performance moisture-proof paper. The moisture-proof paper prepared through the method has high waterproofness and oil resistance, and the moisture regain is lower than 5 percent after standing at a high temperature of 40 DEG C and at high humidity of 95 percent for 24 hours.

Description

technical field [0001] The invention belongs to the technical field of special paper preparation, and in particular relates to a high-performance moisture-proof paper and its preparation method and application. Background technique [0002] With the improvement of people's living standards, the performance requirements of the paper used are getting higher and higher, and the moisture resistance of the paper is an important factor affecting the performance of the paper. Moisture-proof paper is a special paper that uses a coating process to coat the surface of the paper with a thin film so that moisture cannot penetrate into the inside of the paper. It is widely used in daily life papers (such as recording paper, food packaging paper, etc.) that have waterproof and moisture-proof requirements, and packaging papers in industrial fields (such as external protective films for electronic products, outer paper surfaces for floor coverings, etc.) kind. [0003] For ordinary paper,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/20D21H19/14D21H21/18D21H21/14
CPCD21H19/14D21H19/20D21H21/14D21H21/18
Inventor 杨飞马红燕冯郁成
Owner SOUTH CHINA UNIV OF TECH
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