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Preparation method of starch glue

A technology of starch glue and native starch, applied in the field of corrugated base paper, can solve the problem of high glue viscosity, and achieve the effects of reducing production cost, saving production cost and avoiding pollution

Active Publication Date: 2012-06-13
MCC PAPER YINHE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a kind of preparation method of starch glue, and it adopts APMP pulping waste liquor to boil raw starch, can obtain the starch glue solution of lower viscosity, overcome the problem that the viscosity of glue solution is too high when clear water boils raw starch, It uses starch glue boiled from waste liquid and original starch instead of starch glue boiled from modified starch to sizing the surface of corrugated base paper, which saves production cost and avoids environmental pollution caused by APMP pulping waste liquid. There are technical problems

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  • Preparation method of starch glue
  • Preparation method of starch glue

Examples

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Embodiment 1

[0014] Example 1: Preparation steps of starch glue in 4400 papermaking workshop of China Metallurgical Paper Yinhe Co., Ltd.:

[0015] (1) Add 8 cubic meters of APMP pulping waste liquid into the glue barrel, and start stirring;

[0016] (2) Put 1 ton of air-dried raw corn starch into the glue barrel and stir for 5 minutes;

[0017] (3) Turn on the steam for boiling, heat up to 70°C, keep warm for 15 minutes, continue to heat up to 98°C, keep warm for 20 minutes, and prepare the gelatinized starch glue;

[0018] (4) Transfer the gelatinized starch glue solution to the dilution tank, start stirring, add 3.5 cubic meters of APMP pulping waste liquid to the dilution tank, stir for 5 minutes, and put it in the glue storage tank of the paper feeder.

[0019] In the above example, the APMP pulping waste liquid comes from the screw press behind the bleaching tower of the APMP pulping workshop, its solids concentration is 2.3%, and the residual hydrogen peroxide is 1100 g / cubic. The...

Embodiment 2

[0022] Example 2: Preparation steps of starch glue in the 3200 papermaking workshop of China Metallurgical Paper Yinhe Co., Ltd.:

[0023] (1) Add 7 cubic meters of APMP pulping waste liquid into the glue barrel, and start stirring;

[0024] (2) Put 1 ton of air-dried raw corn starch into the glue barrel and stir for 5 minutes;

[0025] (3) Turn on the steam for boiling, heat up to 70°C, keep warm for 15 minutes, continue to heat up to 98°C, keep warm for 20 minutes, and prepare the gelatinized starch glue;

[0026] (4) Transfer the gelatinized starch glue to the dilution tank, start stirring, add 4.5 cubic meters of APMP pulping waste liquid to the dilution tank, stir for 5 minutes, and put it in the glue storage tank of the paper feeder.

[0027] In the above example, the APMP pulping waste liquid comes from the screw press behind the bleaching tower of the APMP pulping workshop, its solids concentration is 2.2%, and the residual hydrogen peroxide is 1200 g / cubic. The resu...

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Abstract

The invention discloses a preparation method of starch glue and belongs to the field of pulping and papermaking technologies. According to the invention, an APMP pulping waste liquid is used to prepare native starch and residual hydrogen peroxide in the waste liquid is used for oxidative degradation of the native starch so as to obtain a starch glue solution which has similar viscosity with modified starch. Therefore, the problem of high viscosity of the glue solution when preparing the native starch by clear water is overcome. According to the method, the modified starch is replaced by the native starch for the preparation of surface glue. In the meanwhile, as the APMP pulping waste liquid contains a certain concentration of a solid, the solid is reserved in the glue solution during the surface glue preparation process and can partly replace the starch for surface sizing, so as to reduce the production cost. In addition, the waste liquid generated during the APMP pulping process is also effectively utilized by the method, thus realizing dual goals of economic benefits and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking, in particular to a method for preparing starch glue by using alkaline hydrogen peroxide chemical mechanical pulp (APMP) pulping waste liquid and raw starch, and the starch glue is mainly suitable for corrugated base paper. Background technique [0002] Corrugated base paper is an important component material for the production of corrugated cardboard. Corrugated base paper requires high ring compressive strength and tensile strength, as well as good water resistance. In order to improve the strength and water resistance of corrugated base paper, it is often subjected to surface sizing treatment, and the surface sizing agent used is mainly starch glue. Starch glue is prepared by heating the aqueous suspension of starch. If unmodified starch (native starch) is used for boiling, the viscosity of starch glue will be too high to meet the production requirements; therefore, modified st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16C08B30/12
Inventor 张义华田中粟曾金枝戴莉张长海
Owner MCC PAPER YINHE