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Method for manufacturing high ring-pressure strength corrugated base paper

A technology for corrugated base paper and compressive strength, which is applied in the directions of paper, paper making, paper making machine, etc., can solve the problems of unsatisfactory application effect of ring pressure enhancer and low grade of corrugated paper products.

Inactive Publication Date: 2008-09-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application effect of these ring pressure strengthening agents is not ideal, resulting in the low grade of the prepared corrugated paper products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: First, add raw starch to the unbleached chemical pulp and stir evenly, then add water-soluble bisphenol A epoxy resin, and finally add cationic polyacrylamide with a number-average molecular weight of 20 million and stir evenly to carry out papermaking High ring crush strength corrugated base paper, wherein the mass ratio of unbleached chemical pulp, native starch, bisphenol A epoxy resin and cationic polyacrylamide is 100:0.01:5:0.01.

Embodiment 2

[0008] Example 2: First, add raw starch to the unbleached chemical pulp and stir evenly, then add water-soluble bisphenol A epoxy resin, and finally add cationic polyacrylamide with a number-average relative molecular weight of 10 million and stir evenly to carry out papermaking High ring crush strength corrugated base paper, wherein the mass ratio of unbleached chemical pulp, native starch, bisphenol A epoxy resin and cationic polyacrylamide is 100:0.1:2:0.1.

Embodiment 3

[0009] Example 3: First, add cationic starch to the semi-chemical slurry and stir evenly, then add water-emulsifying bisphenol A type epoxy resin with a particle radius of 20nm-2μm, and finally add non-ionic polymer with a number-average relative molecular weight of 5 million The acrylamide can be stirred evenly to produce high-ring-strength corrugated base paper, wherein the mass ratio of semi-chemical pulp, cationic starch, bisphenol A epoxy resin and non-ionic polyacrylamide is 100:1:1:0.2.

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PUM

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Abstract

The invention discloses the preparation method of a high ring crush strength corrugated base paper, firstly, a starch is added into the corrugated paper slurry then stirred to be even; secondly, a non-ionic epoxy resin is added; finally, a polyacrylamide is added and stirred to be even, then making the high ring crush strength corrugated base paper is carried out. Because the invention uses a component whose structure and characteristic are different from a ring crush strength intensifier present widely used, the component comprises a plurality of benzene rings and epoxy groups. The benzene rings can endow the ring crush strength intensifier with very high glass transition temperature, and then enhances the ring crush strength of the corrugated base paper; at the same time, the cross linking function of the epoxy groups can make a powerful covalent bond combination exist between the paper fiber, which makes the corrugated base paper have certain wet strength.

Description

technical field [0001] The invention belongs to the field of preparation technology of papermaking chemicals, in particular to a method for preparing corrugated base paper with high ring crush strength. Background technique [0002] Corrugated base paper is an important raw material for making corrugated boxes. Its main function is to separate the cardboard on both sides when the corrugated box is subjected to strain, so that the cardboard can maintain the maximum thickness, so that the cardboard can get the maximum moment of inertia. . Therefore, ring crush strength is the most important quality requirement for corrugated base paper. At present, the ring pressure strengthening agents used in the production of corrugated base paper in China mainly include starch, polyacrylamide, copolymer emulsion type strengthening agent and chitosan type strengthening agent. However, the application effects of these ring pressure strengthening agents are not ideal, resulting in low-grade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F11/12D21H17/28D21H17/55D21H17/29D21H17/52
Inventor 沈一丁李小瑞李刚辉费贵强王海花
Owner SHAANXI UNIV OF SCI & TECH
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