Light paper surface sizing method

A surface sizing and lightweight paper technology, applied in paper, papermaking, textiles and papermaking, etc., can solve the problems affecting product quality and production cost, poor surface fineness, and low whiteness of lightweight paper, so as to improve the degree of fineness and Glossiness, reduce the consumption of pulp, improve the effect of paper surface strength

Active Publication Date: 2013-02-13
MCC PAPER YINHE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional oxidized starch surface sizing technology makes the light paper produced are prone to quality problems such as low whiteness, poor gloss, poor surface fineness, lint and powder loss, etc. At the same time, the pulp consumption in the process of producing light paper is high. Seriously affected the product quality and production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Go 2m first 3 Add 330kg of clean water into the reaction tank, turn on the agitator, then add 12.9g of amylase to the reaction tank, the amount of amylase added: 0.015% (relative to dry corn starch), and stir for 5 minutes to disperse the amylase evenly;

[0023] 2) Add 100kg of cornstarch with a solid content of 86% to prepare a starch solution with a concentration of 20wt%.

[0024] 3) Turn on the steam valve to raise the temperature of the starch solution to 70-72°C, then close the steam valve and keep warm at this temperature for 25 minutes to fully react the amylase with the starch.

[0025] 4) After the reaction is completed, continue to open the steam valve to rapidly raise the temperature to 95-100°C, then close the steam valve, and keep warm at this temperature for 20 minutes to kill the activity of amylase and terminate the reaction between amylase and starch. The glue viscosity is controlled at 8-12cps to ensure the stability of the glue quality.

[0026...

Embodiment 2

[0032] 1) Go 4m first 3 Add 488kg of clear water into the reaction tank, turn on the agitator, and then add 27.5g of amylase to the reaction tank, the amount of amylase added: 0.016% (relative to dry corn starch), and stir for 5 minutes to make the amylase disperse evenly;

[0033] 2) Add 200kg of corn starch with a solid content of 86% to prepare a starch solution with a concentration of 25%.

[0034] 3) Turn on the steam valve to raise the temperature of the starch solution to 70-72°C, then close the steam valve, and keep warm at this temperature for 20 minutes to make the amylase and starch fully react.

[0035] 4) After the reaction is completed, continue to open the steam valve to rapidly raise the temperature to 95-100°C, then close the steam valve, and keep warm at this temperature for 20 minutes to kill the activity of amylase and terminate the reaction between amylase and starch. The glue viscosity is controlled at 8-12cps to ensure the stability of the glue quality....

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PUM

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Abstract

The invention discloses a light paper surface sizing method, belonging to the technical field of pulping and papermaking. The light paper surface sizing method comprises the steps of starch dissolution, starch pasting reaction, and amylase inactivation, dilution, cooling as well as batching for the starch. By improving a traditional oxidized starch surface sizing method, and adopting corn starch, starch amylase, liquid calcium and a water repellent agent to perform a surface sizing technology, the light paper surface sizing method disclosed by the invention has the advantages of not only improving whiteness, glossiness, surface fine and smooth degree and surface intensity of the light paper, but also reducing consumption of a sizing agent in a light paper production process, and having an important significance on improving quality of the product and lowering the production cost.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking, in particular to a surface sizing method for light paper. Background technique [0002] Lightweight paper is light offset printing paper, which has the characteristics of good texture and bulk, high opacity, printing adaptability and good original reproduction after printing. It does not contain fluorescent whitening agent, has high content of mechanical pulp, and is environmentally friendly and comfortable. The original color used can protect the eyes of readers, especially the elderly and children, so that they can protect their eyesight from damage while reading. It has a good texture and is light and thick. Easy for readers to carry and read. The most notable feature of light paper is its high bulk, which requires that the pulp used to prepare light paper must have the characteristics of high bulk. At present, the traditional oxidized starch surface sizing technology is used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H23/52D21H23/78
Inventor 冯桂平何强邹志勇何华梅唐三军
Owner MCC PAPER YINHE
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