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Method for preparing surface sizing starch solution for papermaking

A technology of surface sizing and starch solution, which is applied in papermaking, textiles, papermaking, paper coating, etc., and can solve the problem of high application cost

Active Publication Date: 2010-11-17
YUEYANG FOREST & PAPER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Synthetic polymer additives have developed rapidly in recent years because they can give paper more excellent performance, mainly including styrene-maleic anhydride polymer (SMA), styrene-acrylate copolymer (SAE), styrene- Acrylic ester-maleic anhydride monoester copolymer (SAM), polyurethane aqueous dispersion (PU), etc., the application cost of synthetic polymer surface sizing agent is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 200g of starch and 800mL of water into the beaker, stir evenly, add 3g of α-amylase diluted 100 times, 6g of 2,3-epoxypropyltrimethylammonium chloride, and place in a water bath with a stirrer to heat up the reaction , react at 70-90°C for 10-30 minutes, continue to heat up to 120-130°C to stop the reaction, dilute the starch solution with water to a concentration of 6-12%, cool to 50-60°C to obtain the surface sizing for papermaking Starch solution.

Embodiment 2

[0016] Add water 8m into the reactor 3 , while stirring, add 2t of starch, stir evenly, add 30kg of α-amylase diluted 100 times, 50kg of 2,3-epoxypropyltrimethylammonium chloride, heat up to 70-90°C for 10-30 minutes, Continue to raise the temperature to 120-130°C to stop the reaction, add water to dilute the starch liquid to a concentration of 6-12%, and cool it down to 50-60°C to obtain the starch liquid for papermaking surface sizing.

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PUM

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Abstract

The invention relates to a method for preparing surface sizing starch solution for paper industry. The method comprises the following steps of: adding a certain amount of water and a certain amount of original starch into a reaction vessel according to a proportion in turn and uniformly mixing the water and the original starch; adding alpha-amylase and a cationic etherifying agent with stirring according to a proportion; reacting for 10 to 30 minutes at the temperature of between 70 and 90 DEG C; continuously increasing the temperature to 120-130 DEG C and stopping the reaction; adding the water into the starch solution to dilute the starch solution until the concentration is 6 to 12 percent; and cooling the solution to 50-60 DEG C and conveying the solution for surface sizing for papermaking. A product of the invention can effectively improve the surface strength of a paper, reduce the phenomena of hair shedding and powder shedding and improve the printing performance and the writing performance; the viscosity of the product can be adjusted according to requirements to ensure convenient operation of sizing technology; and the method also has the characteristics of simple preparation process, capability of greatly reducing production cost and the like.

Description

technical field [0001] The invention relates to a method for preparing starch liquid for papermaking surface sizing. [0002] Background technique [0003] Surface sizing is a process in the papermaking process. It is usually located at the end of the dryer section of the paper machine. When the paper sheet is not completely dry but has a certain strength, a layer of glue is sprayed on the surface of the paper and cardboard after subsequent drying. Form an adhesive film to achieve the purpose of changing the surface properties of paper or cardboard. [0004] With the improvement of the technical level of the paper industry, the surface sizing of paper has become a routine paper treatment process. Especially in recent years, due to the development of printing technology, the surface properties, surface strength and printing performance of cultural paper and packaging paper have been raised. Higher requirements, so the paper industry is constantly exploring new surface sizin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H19/12C08B31/12
Inventor 李丹周金涛刘春景
Owner YUEYANG FOREST & PAPER CO LTD
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