Paper pulp prepared from maize straw, preparation method thereof and paper product prepared from paper pulp

A technology of corn stalks and pulp, applied in the direction of pulp bleaching, pulping with inorganic alkali, non-woody plant/crop pulp, etc., can solve the problem of affecting the ecological balance of the environment, the existing technology has no more detailed description, cultural paper resistance Tensile strength, softness, and water absorption cannot meet the specified standards, so as to achieve the effects of low cost, high utilization rate, and reduced heat preservation time

Active Publication Date: 2011-08-17
SHANDONG TRALIN PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] There are many shortcomings in the cultural paper and household paper of the prior art. Most of the original wood pulp is used. Because a large amount of wood needs to be cut down, the ecological balance of the environment is seriously affected and long-term adverse consequences are caused; some non-virgin wood pulp is prepared. The tensile strength,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] The corn stalk raw material is prepared and put into a vertical cooking pot, and the caustic soda-anthraquinone method is adopted. Add cooking liquid in the vertical cooking pot, the amount of alkali used is 20% of the absolute dry raw material amount in terms of sodium hydroxide, the anthraquinone add-on is 0.08% of the absolute dry raw material amount, and the liquid ratio is 1: 6, after that Put in steam for heating, heat up to 140°C, and keep warm for 0 minutes to obtain a coarse pulp with a hardness of potassium permanganate value of 26. The coarse pulp is subjected to black liquor extraction and pulp washing to obtain a cleaned pulp with a concentration of 12%. , The pulp yield is 55%.

[0078] The resulting corn stover pulp had a brightness of 38% ISO and a bulk of 1.8 cm 3 / g, the tensile index is 47N.m / g, the folding endurance is 10 times, the breaking length is 4.0km, the air permeability is 85ml / min, the ash content is 10%, the tearing degree is 180mN, and t...

Embodiment 2

[0080] The corn stalk raw material is prepared and put into a vertical cooking pot, and the ammonium method is adopted. Add the cooking liquid in the vertical cooking pot, the amount of ammonium sulfite is 22% of the absolute dry raw material, the amount of ammonia water is 7% of the absolute dry raw material, the addition of anthraquinone is 0.08% of the absolute dry raw material, and the liquid ratio is 1 : 6; feed steam for heating, heat up to 175° C., and keep warm for 50 minutes to obtain a coarse slurry with a hardness of potassium permanganate value 16. Black liquor extraction and pulp washing were carried out on the coarse pulp to obtain a washed pulp with a concentration of 8%, and the pulp yield was 48%.

[0081] The prepared corn stover pulp has a brightness of 40% ISO and a bulk of 1.8 cm 3 / g, the tensile index is 45N.m / g, the folding endurance is 15 times, the breaking length is 4.5km, the air permeability is 70ml / min, the ash content is 7%, the tearing degree i...

Embodiment 3

[0083] The raw materials of corn stalks are prepared and loaded into a horizontal tube continuous digester, and the caustic soda-anthraquinone method is adopted. Add the cooking liquid in the horizontal tube type continuous digester, the amount of alkali used is 16% of the absolute dry raw material amount in terms of sodium hydroxide, the anthraquinone addition is 0.08% of the absolute dry raw material amount, and the liquid ratio is 1: 2.8 , and then feed steam to heat, heat up to 140°C, and keep warm for 40 minutes to obtain a coarse pulp with a hardness of potassium permanganate value 17. The coarse pulp is subjected to black liquor extraction and pulp washing to obtain a concentration of 12%. Slurry, the slurry yield is 49%.

[0084] The prepared corn stover pulp has a brightness of 48% ISO and a bulk of 1.9 cm 3 / g, the tensile index is 35N.m / g, the folding endurance is 10 times, the breaking length is 4.0km, the air permeability is 80ml / min, the ash content is 7%, the t...

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Abstract

The invention relates to maize straw paper pulp, which is prepared from maize straw serving as a raw material. The whiteness of the maize straw paper pulp is 38-60 percent ISO (International Standardization Organization), the bulk is 1.8-2.5 cm<3>/g, the tensile index is 35-65 N.m/g, the folding resistance is 10-40 times, the fracture length is 4.0-6.5 km, the air permeability is 70-200 ml/min, the ash content is 5-10 percent, the tear resistance is 180-260 mN, and the tear resistance index is 3.0-4.2 mN.m<2>/g. The paper pulp has good performance parameters, can replace the conventional wood pulp and can be used for preparing cultural paper and paper for daily use. A preparation method of the maize straw paper pulp comprises stock preparation, cooking and black liquor extraction, wherein the heat preserving time in the cooking process is 0-50 minutes.

Description

technical field [0001] The invention relates to a corn stalk pulp, a preparation method of the corn stalk pulp, and cultural paper products and household paper products made from the corn stalk pulp. Background technique [0002] Due to the increasing shortage of wood resources in the world, it has become the goal pursued by various paper-making enterprises to produce pulp and paper without destroying forests and the environment. As a solution to this problem, the technology of making pulp from non-wood plant fibers using annual or biennial plants such as: farmland waste, bamboo, sugarcane stalks discarded after sugar production, rice and wheat straw, etc. as the main material has been attracting attention. [0003] Although the pulping of various annual or biennial plants has been studied in the prior art, and non-wood fiber pulps with good properties have been obtained, it is generally considered that the content of cellulose in corn stover is too low, for example, cellulo...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21C3/02D21C9/16
Inventor 李洪发宋明信陈松涛杨吉慧毕衍金
Owner SHANDONG TRALIN PAPER
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