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Corn starch adhesive and preparation method thereof

A corn starch and adhesive technology, applied in the directions of starch-derived adhesives, adhesive types, non-polymer adhesive additives, etc. Complex problems such as improving ring compressive strength and tensile strength, enhancing cross-linking and initial viscosity, and simple preparation process

Inactive Publication Date: 2011-12-07
RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since corrugated base paper is generally produced by recycling ordinary waste paper, the fiber length and fiber properties have undergone tremendous changes with the increase in the number of cycles, resulting in low-grade corrugated paper with rough appearance and poor strength.
The corrugated paper in the prior art is generally made of raw wood pulp through starch adhesive, and its ring compressive strength and tensile strength are insufficient.
[0003] Although some patents disclose different starch adhesives used to enhance the strength of corrugated paper, there are the following disadvantages in the process of production and use: the Chinese invention patent with application number 95115647 discloses a corn starch adhesive and a preparation method thereof. The drying speed is slow, the concentration of lye is high, the corrosion is strong, and the end point of the reaction is difficult to judge; the Chinese invention patent with application number 97111961 discloses a hybrid starch adhesive especially suitable for corrugated box bonding and its production method. Its drying speed is slow, and the total amount of raw materials used is large; the Chinese invention patent application number 200810143079 discloses a starch adhesive and its preparation method. And it is not suitable for the production of existing chemical industry production equipment; the Chinese invention patent of application number 200810141014 discloses a kind of cornstarch adhesive, its manufacturing process is complicated, the cohesive force is not strong, and the steam or fog of raw material hydrogen peroxide is harmful to the human respiratory tract. Strongly irritating
[0004] In summary, the starch adhesives in the prior art have the disadvantages of weak cohesive force, slow drying speed, weak water resistance and alkalinity, unstable performance, and high production cost. And the starch adhesive used to enhance the strength of corrugated paper is a major issue that researchers in this field need to study and solve urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] This example is made from the following raw materials in parts by weight: 90 parts of cornstarch, 2.5 parts of potassium permanganate, 14 parts of sodium hydroxide, 2.3 parts of borax, 0.7 part of sodium thiosulfate, 1.6 parts of sodium bentonite, and 1550 parts of water The particle size of the corn starch is not less than 100 mesh, the mass purity of the potassium permanganate is not less than 99.3%, and the mass purity of the sodium hydroxide, borax and sodium thiosulfate is not less than 99%.

[0015] The preparation method of the present embodiment comprises the following steps:

[0016] (1) The sodium bentonite is ground by a ball mill and sieved, and the sieving particle size is not less than 200 mesh.

[0017] (2) Heat 925 parts by weight of water in a constant temperature water bath with a temperature of 60° C., and at the same time slowly add cornstarch and keep stirring until it becomes a paste.

[0018] (3) 350 parts by weight of water are placed in a const...

Embodiment 2

[0021] This example is made from the following raw materials in parts by weight: 80 parts of cornstarch, 2 parts of potassium permanganate, 12 parts of sodium hydroxide, 1.8 parts of borax, 0.4 part of sodium thiosulfate, 1.2 parts of sodium bentonite, and 1400 parts of water . In the present embodiment, the particle size of cornstarch and the mass purity of potassium permanganate, sodium hydroxide, borax and sodium thiosulfate are all the same as in embodiment 1.

[0022] The preparation method of the present embodiment comprises the following steps:

[0023] (1) The sodium bentonite is ground by a ball mill and sieved, and the sieving particle size is not less than 200 mesh.

[0024] (2) Heat 850 parts by weight of water in a constant temperature water bath at a temperature of 55° C., and at the same time slowly add cornstarch and continuously stir until it becomes a paste.

[0025] (3) 300 parts by weight of water are placed in a constant temperature water bath with a tem...

Embodiment 3

[0028] This example is made from the following raw materials in parts by weight: 100 parts of cornstarch, 3 parts of potassium permanganate, 16 parts of sodium hydroxide, 2.8 parts of borax, 1 part of sodium thiosulfate, 2 parts of sodium bentonite, and 1700 parts of water . In the present embodiment, the particle size of cornstarch and the mass purity of potassium permanganate, sodium hydroxide, borax and sodium thiosulfate are all the same as in embodiment 1.

[0029] The preparation method of the present embodiment comprises the following steps:

[0030] (1) The sodium bentonite is ground by a ball mill and sieved, and the sieving particle size is not less than 200 mesh.

[0031] (2) Heat 1000 parts by weight of water in a constant temperature water bath with a temperature of 65° C., and at the same time slowly add cornstarch and keep stirring until it becomes a paste.

[0032] (3) 400 parts by weight of water is placed in a constant temperature water bath with a temperat...

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Abstract

The invention discloses a corn starch adhesive and a preparation method thereof. The corn starch adhesive is prepared from corn starch, potassium permanganate, sodium hydroxide, borax, sodium thiosulfate, sodium bentonite and water. The preparation method comprises the following steps of: grinding and screening the sodium thiosulfate; preparing pasty corn starch in a constant-temperature water bath; mixing the water, the potassium permanganate and the screened sodium bentonite in the constant-temperature water bath, and pouring into the pasty corn starch to prepare mixed solution; adding water to dissolve the sodium hydroxide, the borax and the sodium thiosulfate, and pouring into the mixed solution to prepare the finished product. The preparation process is simple, and the conventional equipment is not needed to be changed; during production, the temperature is low, and the energy consumption is low; and the produced starch adhesive has the advantages of good liquidity, strong adhesiveness, quick drying, high stability, no pollution, and can greatly improve the ring crush compression resistance and the tension strength of corrugated paper.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a cornstarch adhesive for wrapping paper and a preparation method thereof. Background technique [0002] Corrugated paper is a common packaging paper with mechanical properties such as light weight, compression resistance, puncture resistance, tear resistance and cushioning, shock resistance, easy processing and molding, and good adaptability to decoration and printing. It can be recycled and reused, and it is environmentally friendly. No pollution. However, since corrugated base paper is generally produced by recycling ordinary waste paper, the fiber length and fiber properties have undergone tremendous changes with the increase in the number of cycles, resulting in low-grade corrugated paper with rough appearance and poor strength. The corrugated paper in the prior art is generally made of raw wood pulp and made of starch adhesive, and its ring compressive streng...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J103/10C09J11/04C09J11/06
Inventor 王香增李大鹏高瑞民张书勤孟庆宇陈有梅王永娟颜宇琛赵亮
Owner RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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