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Coating starch, production technology thereof, and coatings using coating starch

A technology for coating starch and coatings, applied in paper coatings, coatings, pigment-containing coatings, etc., can solve the problems of not effectively reducing production costs, not increasing the coating amount of paper, and low solid content of coating starch. , to achieve the effect of reducing energy loss and thickness loss, strong adhesion and good fluidity

Inactive Publication Date: 2016-12-21
山东熙来淀粉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, for the production of coated paper, there is no good way to increase the coating amount of paper by using more coatings in the production process.
Some people use pure oxidized coated starch to adjust the coating formula, hoping to meet the production requirements and reduce costs. However, the solid content of oxidized coated starch is low, usually only 30-35%, and it is very easy to age and increase the viscosity. Faster, must be heat-insulated, and cannot effectively reduce production costs

Method used

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  • Coating starch, production technology thereof, and coatings using coating starch
  • Coating starch, production technology thereof, and coatings using coating starch
  • Coating starch, production technology thereof, and coatings using coating starch

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A kind of coating starch, production technology comprises the following steps:

[0049] 1) Oxidation reaction: 300Kg original starch and 450Kg water are joined in reaction container, form starch slurry, under the state of stirring, add the sodium hydroxide of original starch quality 2.5% (sodium hydroxide is made into the concentration that is 2.5%) sodium hydroxide solution), adjust the pH of the starch slurry to be 8.0, then add 1% ammonium persulfate of the original starch quality to react for 2.0 hours;

[0050] 2) Cross-linking reaction: Add 10% butyl acrylate (cross-linking agent) of starch quality to the material obtained in step (1), react at 80° C. for 1.5 hours, then add bromochlorohydantoin (bactericide), and obtain An emulsion coating starch with a solid content of 50% and a viscosity of 300 cp.

Embodiment 2

[0052] A kind of coating starch, production technology comprises the following steps:

[0053] 1) Oxidation reaction: 400Kg original starch and 550Kg water are joined in reaction container, form starch slurry, under the state of continuous stirring, add the sodium hydroxide that is original starch quality 3.5% (sodium hydroxide is made into concentration and is 5 % sodium hydroxide solution), adjust the pH of the starch slurry to be 10.0, then add 10% hydrogen peroxide of the original starch quality, and react for 3.0 hours;

[0054] 2) crosslinking reaction: in the material that step (1) obtains, add the butyl acrylate (crosslinking agent) that is original starch quality 20%, react 2.0 hours at 90 ℃, then add sodium dichloroisocyanurate (bactericide ), the obtained solid content is 55%, the viscosity is the coating starch of the emulsion of 600cp.

Embodiment 3

[0056] A kind of coating starch, production technology comprises the following steps:

[0057] 1) Oxidation reaction: 350Kg starch and 500Kg water are joined in the reaction container, form starch slurry, under the state of continuous stirring, add the sodium hydroxide that the original starch mass fraction is 3.0%. % sodium hydroxide solution), adjust the pH of the starch slurry to be 9.0, then add sodium hypochlorite (oxidant) that is 5% of the starch quality, and react for 2.5 hours;

[0058] 2) crosslinking reaction: in the material that step (1) obtains, add the butyl acrylate (crosslinking agent) of starch quality 15%, 80 ℃ of reaction 2 hours, add trichloroisocyanuric acid (bactericide) then, obtain solid Emulsion-like coated starch with a content of 50% and a viscosity of 400 cp.

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Abstract

The invention discloses a coating starch. The coating starch is an emulsion with the solid content being greater than 50% and the viscosity being 300-600 cp. Raw materials for preparing the coating starch comprise, by mass, 300-400 parts of native starch, 450-550 parts of water, sodium hydroxide accounting for 2.5-3.5% of the mass of the native starch, an oxidant accounting for 1-10% of the mass of the native starch, and a cross-linking agent accounting for 10-20% of the mass of the native starch, wherein the oxidant is peroxide or hypochlorite or persulfate, and the cross-linking agent is butyl acrylate or vinyl acetate or methyl methacrylate. The coating starch has the advantages of high solid content, low viscosity, good fluidity, strong adhesion stress, convenience in use, and low cost. The invention also discloses a simple, convenient, energy-saving and consumption-reduction production technology of the coating starch, and a low-weight coated paper coating and a low-weight on-machine coated paper coating produced by using the coating starch.

Description

technical field [0001] The invention relates to the papermaking industry, in particular to a coated starch, a production process thereof and a coating using the coated starch. Background technique [0002] Low-quantity coated paper (light-weight coated paper): the base paper made from coniferous pulp, broad-leaved pulp, and chemical-mechanical pulp, with cationic starch, retention and drainage aids and other chemicals added, is pre-dried in a dryer. Finally, the paint is transferred to the paper by using a film transfer sizing machine, and then dried and calendered to become a finished paper roll. The coating amount of the paint on both sides is 20-25g / m2 in total. [0003] Coated paper in low basis weight machine: The base paper made of coniferous pulp, broadleaf pulp and chemical mechanical pulp is mixed with cationic starch, retention and drainage aids and other chemicals. The curtain coater transfers the coating to the paper, preliminarily dries it, and after two coats ...

Claims

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Application Information

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IPC IPC(8): D21H19/54D21H19/38D21H19/40D21H19/84
CPCD21H19/54D21H19/385D21H19/40D21H19/84
Inventor 吕志红
Owner 山东熙来淀粉有限公司
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