Surface sizing agent for improving paper deflection and paperboard circular press stength

A technology of surface sizing agent and ring compressive strength, which is applied in the direction of paper, papermaking, water repellent addition, etc., can solve the problems of stiffness ring compressive strength, surface strength and water resistance, etc., to reduce quantitative and improve grades , cost reduction effect

Inactive Publication Date: 2007-10-10
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of surface sizing agent that improves the stiffness of paper and the ring crushing strength of cardboard, it can overcome the sti

Method used

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Examples

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Effect test

Embodiment 1

[0017] A surface sizing agent used to improve the stiffness of paper and the ring crush strength of cardboard, which is a mixture of 80% urea-formaldehyde resin and 20% hydrochloric acid by weight, and is prepared with 10% water when used concentration.

Embodiment 2

[0019] A surface sizing agent used to improve the stiffness of paper and the ring pressure strength of cardboard, which is a mixture of 90% phenolic resin and 10% sulfuric acid by weight, prepared with 20% water when used concentration.

Embodiment 3

[0021] A surface sizing agent used to improve the stiffness of paper and the ring crush strength of cardboard, which is a mixture of 95% by weight of melamine resin and 5% of ammonium chloride, prepared with water to 30% concentration.

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PUM

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Abstract

The present invention related to a surface sizing agent for raising stiffness of paper and ring crush of board. It is a mixture made up by using (by wt %) 80-99.5% of water-soluble thermosetting resin adhesive and 0.5-20% of solidifying agent. Said invention also provides its application method.

Description

1. Technical field: [0001] The invention relates to the technical field of surface sizing agents, in particular to a surface sizing agent for improving the stiffness of paper and the ring pressure strength of cardboard. 2. Background technology: [0002] The rapid development of domestic paper product packaging has promoted the continuous growth of domestic demand for high-strength corrugated base paper and kraft liner paper. At present, the future development trend of my country's corrugated box industry is to develop corrugated base paper in the direction of low weight, high strength and light weight. The domestic consumption of high-strength corrugated base paper is still large, and we should vigorously develop local high-strength corrugated base paper and reduce the amount of imports. [0003] The strengthening agents currently used for paper and paperboard mainly include: starch chemical additives, polyacrylamide (PAM) strengthening agents, copolymer emulsion type stre...

Claims

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Application Information

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IPC IPC(8): D21H21/16D21H17/33D21H17/28D21H17/65D21H17/66D21H17/14D21H17/07D21H17/55
Inventor 周小凡罗崇来
Owner NANJING FORESTRY UNIV
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