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A kind of raw corn starch surface sizing liquid and its preparation method, cardboard
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A surface sizing and native starch technology, applied in papermaking, paper, paper coating and other directions, can solve the problems of low bonding strength, high viscosity of corn native starch surface sizing solution, easy aging, etc., and achieves good anti-aging performance, The effect of reducing the increase of sieve residue and low cost
Active Publication Date: 2022-05-17
NINGBO ASIA PULP & PAPER
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[0003] The technical problem mainly solved by this application is to provide a surface sizing solution of corn raw starch and its preparation method and paperboard, which can solve the problems of high viscosity, low bonding strength and easy aging of the surface sizing solution of corn raw starch
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preparation example Construction
[0011] Such as figure 1 Shown, the preparation method of the original corn starch surface sizing liquid of the present application comprises:
[0012] S11: mixing raw corn starch and amylopectin to form a starch slurry.
[0013] In the specific implementation, the raw corn starch and amylopectin are mixed according to a preset ratio, and the mixed raw corn starch and amylopectin are added to a certain amount of water and stirred evenly, so that the raw corn starch and amylopectin are evenly dispersed in the The starch slurry is thus prepared in water. Wherein, the weight of the raw corn starch in the mixed raw corn starch and amylopectin accounts for 10-80%, for example, the raw corn starch accounts for 20%, 35%, 50% and the like of the raw corn starch and amylopectin. The solid content of the controlled starch slurry is 28-32%.
[0014] Wherein, the amylopectin in the embodiment of the present application comprises native tapioca starch. Because of its high branch chain c...
Embodiment 1
[0029] A preparation method for corn raw starch surface sizing solution, comprising the following steps:
[0030] At room temperature, weigh 100g of raw corn starch and dissolve it in water to prepare a starch slurry, wherein the weight ratio of starch to water is 32:68, and add 300ppm (ie 0.03wt%) of medium temperature α-amylase Into the above starch slurry, stir and disperse evenly, heat the starch slurry, heat the temperature to 90°C by heating in an oil bath, keep it at 90°C for 30 minutes, stir for 30 minutes, continue heating to 140°C, stop heating, and obtain Corn starch surface sizing solution.
Embodiment 2
[0032] A preparation method for corn raw starch surface sizing solution, comprising the following steps:
[0033] Under normal temperature, weigh 100g of corn starch, and dissolve it in water to prepare starch slurry, wherein the weight ratio of starch to water is 32:68, and add 0.3wt% protein inhibitor to the above starch slurry, Stir and disperse evenly, continue to add 300ppm (ie 0.03wt%) of medium-temperature α-amylase to the above-mentioned starch slurry, after stirring and dispersing evenly, heat the starch slurry, and heat the temperature to 90°C by heating in an oil bath. Keep warm at 90°C for 30 minutes, then stir for 30 minutes, continue heating to 140°C, stop heating, and obtain corn starch surface sizing solution.
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Abstract
The application discloses a corn raw starch surface sizing solution and a preparation method thereof, and board paper, comprising mixing raw corn starch and amylopectin to form a starchslurry; adding protein inhibitors and amylase to the starchslurry; The raw corn starch surface sizing solution is obtained after the starch slurry after feeding is subjected to a temperature raising and heat preservation process. The application improves the stability and anti-aging performance of corn raw starch surface sizing solution by introducing amylopectin into raw corn starch; by introducing protein inhibitors, the precipitation of protein in corn raw starch and amylopectin can be inhibited; by The introduction of amylase can reduce the molecular weight of starch, thereby reducing the viscosity of the surface sizing solution of raw corn starch, and the prepared surface sizing solution of raw corn starch has good anti-aging performance, low viscosity and high bonding strength; and the present application discloses Corn starch surface sizing liquid uses corn starch and amylopectin as main raw materials, and the cost is low.
Description
technical field [0001] The present application relates to the field of preparation of starch sizing agents, in particular to a surface sizing liquid of raw corn starch, a preparation method, and paperboard. Background technique [0002] Surface sizing technology is one of the main and effective methods to improve the quality of paper and paperboard, and plays a very important role in improving the surface properties of paper and modifying the physical properties of paper. Surface sizing increases the physical strength of the paper and improves the runnability of the paper machine. At present, the types of surface sizing solutions are divided into natural polymer surface sizing solutions, synthetic surface sizing solutions, and surface sizing solutions shared by various polymers. Among them, raw corn starch is used as a cheap natural polymer surface sizing solution raw material in the paper industry. Due to the high amylose content in raw corn starch and the natural characte...
Claims
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