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Composite sizing agent for coating paper in machine and sizing method

A composite and coated paper technology, which is applied in the direction of water repellent addition, etc., can solve the problems of poor effect and large dosage, and achieve the effects of less dosage, improved absorption and short curing time

Active Publication Date: 2009-03-11
SHANGHAI DONGSHENG NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of alkyl ketene dimer (AKD) is a polymer that can react with fibers, but it has a certain curing time, that is to say, it cannot react with fibers immediately after adding, and cannot immediately make the paper have a certain degree of water resistance and resistance. The ability to resist liquid penetration has the disadvantages of large dosage and poor effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1.1 First prepare the composite neutral sizing agent. 16% of neutral sizing agent, 1% of polystyrene acrylic emulsion with a mass percent concentration of 25%, 1% of polystyrene acrylic emulsion with a mass percent concentration of 25%, and 1% of polyaluminum chloride were successively added in the reactor. %, the rest is water, and the sum of the contents of each component is 100%. Stir each component uniformly for 10 minutes according to the above ratio to obtain a composite neutral sizing agent emulsion.

[0029] 1.2 Experimental conditions:

[0030] Neutral sizing agent: Shanghai Dongsheng New Material Co., Ltd. AKD403T neutral sizing agent.

[0031] Polystyrene acrylic emulsion: the product of Shanghai Dongsheng New Material Co., Ltd. with the brand name SS-610.

[0032] Polystyrene acrylate emulsion: the product of Shanghai Dongsheng New Material Co., Ltd. with the brand name DS-SA821.

[0033] Polyaluminum Chloride: Polyaluminum Chloride product of Shandong L...

Embodiment 2

[0048] 2.1 First prepare the composite neutral sizing agent. 8% of neutral sizing agent, 10% of polystyrene acrylic emulsion with a mass percent concentration of 25%, 10% of polystyrene acrylic emulsion with a mass percent concentration of 25%, and polyaluminum chloride 4 were added sequentially in the reactor. %, the rest is water, and the sum of the contents of each component is 100%. Stir each component uniformly for 10 minutes according to the above ratio to obtain a composite neutral sizing agent emulsion. The compositions were added separately to the head box of the paper machine.

[0049] 2.2 Experimental conditions:

[0050] Neutral sizing agent: Shanghai Dongsheng New Material Co., Ltd. AKD403T neutral sizing agent.

[0051] Polystyrene acrylic emulsion: the product of Shanghai Dongsheng New Material Co., Ltd. with the brand name SS-610.

[0052] Polystyrene acrylate emulsion: the product of Shanghai Dongsheng New Material Co., Ltd. with the brand name DS-SA821. ...

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Abstract

The invention provides a composite sizing agent for coating paper in a machine and a sizing method. The composite sizing agent comprises the following compositions in weight percentage: 5 to 20 percent of an alkyl ketene dimer neutral sizing agent, 0.1 to 5.0 percent of a polystyrene acrylic acid emulsion, 0.1 to 5.0 percent of a polystyrene acrylic ester emulsion, 0.1 to 5.0 percent of polyaluminium chloride and the balance being water. Through controlling the water resistant and liquid resistant performances of base paper, the method improves the absorption to painting in the paper coating process, achieves the aim of improving the quality of coating paper after the coating paper is coated and improving the competitiveness of a product on the market. The sizing method has the advantages of simple operation, low cost and considerable application prospect. Compared with the prior art, the sizing method also has the advantages of short curing time and small amount for a sizing paper sample and the like.

Description

technical field [0001] The present invention relates to a compound sizing agent for in-machine coating, and a method for in-slurry sizing for in-machine coated paper, specifically a compound neutral sizing agent used in In-slurry sizing method in the production process of in-machine coating. Background technique [0002] At present, the coating machines used in various paper mills can be divided into two coating methods: external coating and internal coating. Among them, in-machine coating refers to coating directly after the paper is dried and formed during the papermaking process, and the coating used for coating contains water and adhesives. After coating, the water and adhesives in the coating migrate and absorb from the surface of the paper from outside to inside. If If the migration speed of water and adhesive in the coating is too fast, larger particles such as pigments in the coating will remain on the surface of the paper, the bonding strength between the paper bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
Inventor 施晓旦廖秀池
Owner SHANGHAI DONGSHENG NEW MATERIALS
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