Preparation method of high-barrier and high-wet-strength functional paper

A functional, wet-strength technology, applied in pulp beating methods, paper, papermaking, etc., can solve the problems of polymer coating pollution, food toxicity, environmental protection and other problems, achieve good water vapor barrier performance, simple operation, good wet strength performance effect

Pending Publication Date: 2022-03-01
广东盈通纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] High barrier paper generally refers to paper materials that can effectively reduce or prevent the penetration of moisture, grease, water vapor, oxygen and other substances. The common treatment method is to cover the surface of the paper with a polymer coating, but the polymer coating often has pollution and Food toxicity and other unenvironmental or unsafe factors, and the compatibility between paper and polymer coatings are also problems that those skilled in the art need to solve

Method used

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  • Preparation method of high-barrier and high-wet-strength functional paper
  • Preparation method of high-barrier and high-wet-strength functional paper

Examples

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Effect test

Embodiment 1

[0031] A preparation method for papermaking additives, comprising the following steps

[0032] Cellulose (weight-average molecular weight 50000) 100g, chitosan (weight-average molecular weight 200000) 50g and butane tetracarboxylic acid 8g are reacted under 80% sulfuric acid solution 2000mL, and the weight-average molecular weight of polymer mixture in the monitoring reaction system is ( When the weight average molecular weight is 30000-33000), use saturated NaOH solution to neutralize the reaction system to pH=6.5-7, desalt, concentrate and dry to obtain the papermaking additive.

Embodiment 2

[0034] A preparation method for papermaking additives, comprising the following steps

[0035] Cellulose (weight-average molecular weight 100000) 150g, chitosan (weight-average molecular weight 150000) 30g and butane tetracarboxylic acid 10g are reacted under 85% sulfuric acid solution 3000mL, and the weight-average molecular weight of polymer mixture in the monitoring reaction system is ( 45000-48000), use saturated NaOH solution to neutralize the reaction system to pH=6.5-7, desalt, concentrate and dry to obtain the papermaking additive.

Embodiment 3

[0037] A preparation method for papermaking additives, comprising the following steps

[0038] Cellulose (weight-average molecular weight 80000) 120g, chitosan (weight-average molecular weight 180000) 50g and butane tetracarboxylic acid 5g are reacted under 80% sulfuric acid solution 3000mL, and the weight-average molecular weight of polymer mixture in the monitoring reaction system is 40000 -43000, use saturated NaOH solution to neutralize the reaction system to pH=6.5-7, desalt, concentrate and dry to obtain the papermaking additive.

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Abstract

The invention relates to the field of papermaking processes, in particular to a preparation method of high-barrier and high-wet-strength functional paper. According to the invention, cellulose, chitosan and butane tetracarboxylic acid are subjected to a reaction under an acidic condition to obtain a papermaking additive, and the papermaking additive, a silane coupling agent and nano-silica are used in cooperation for papermaking to obtain the high-barrier and high-wet-strength functional paper.

Description

technical field [0001] The invention relates to the field of papermaking technology, in particular to a method for preparing functional paper with high barrier and high wet strength. Background technique [0002] Wet strength means that after the paper is soaked in water, its fibers still have good mechanical strength. For a variety of functional papers such as tissue paper, packaging paper, printing paper, banknote paper, stamp paper, etc., wet strength is the most important. One of the important properties, the wet strength of paper not only depends on the characteristics of the fiber itself, but also depends on the number of nodes between fibers and the bonding strength. Adding various chemical additives to papermaking ingredients can promote the formation of wet fiber webs, and ultimately Improves the strength properties of paper. Commonly used papermaking wet strength agents include polyamide polyamine epichlorohydrin (PAE), urea-formaldehyde resin (UF), melamine-forma...

Claims

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Application Information

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IPC IPC(8): D21H17/14D21H17/24D21H17/25D21H17/67D21H17/68D21D1/02C08B3/12C08B37/08
CPCD21H17/24D21H17/14D21H17/25D21H17/68D21H17/675D21D1/02C08B3/12C08B37/003Y02W30/64
Inventor 陆威武
Owner 广东盈通纸业有限公司
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