Method for preparing high-yield pulp for corrugating base paper from corn straws under normal pressure

A technology for corn stalks and corrugated base paper, which is applied in the directions of pulping with inorganic alkali, separation of raw materials, textiles and papermaking, etc., can solve the problems of low pulping yield and inability to treat waste liquid, etc. The effect of recycling mitigation, reducing production hazards and equipment investment

Inactive Publication Date: 2017-06-06
NORTHEAST FORESTRY UNIVERSITY
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  • Description
  • Claims
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Problems solved by technology

[0005] The present invention aims to solve the problems that corn stalks are treated with high temperature, high pressure and high chemicals in the existi

Method used

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specific Embodiment approach 1

[0023] Specific embodiment 1: The method for preparing high-yield corrugated paper pulp from corn stalks under normal pressure in this embodiment includes the following steps:

[0024] 1. Feed the corn stalks into a pulverizer and pulverize to a particle size of 1 to 2 cm. First, use a centrifugal fan to send the smashed straw into a high-speed vibrating screen to make the material in a suspended or semi-suspended state, and then use a cyclone separator to make the skin and Separate the pith to obtain corn stalk hull raw materials;

[0025] 2. Under normal pressure, immerse the raw materials of corn stalk husk in NaOH solution;

[0026] 3. The impregnated corn stalk husk raw material is pulverized with two-rollers to obtain high-yield pulp for corrugated paper.

specific Embodiment approach 2

[0027] Specific embodiment two: this embodiment is different from specific embodiment one in that the corn stalk husk raw material obtained in step one is pretreated first, and then subjected to the next step of dipping; the specific method of the pretreatment is as follows: The corn stalk husk material is washed with water at 60°C, then steamed under normal pressure for 20-30 minutes, and finally sent to a screw extrusion decomposer to squeeze and decompose. Others are the same as the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: this embodiment is different from specific embodiment one in that the mass concentration of the NaOH solution in step two is 2%-10%. Others are the same as the first embodiment.

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Abstract

The invention provides a method for preparing high-yield pulp for corrugating base paper from corn straws under normal pressure and relates to a preparation method of pulp for corrugating base paper. The problems that the corn straws are basically treated under the conditions of high temperature, high pressure and high medicine content in the existing pulping and paper-making industry, the pulping yield is low and the waste liquid cannot be treated are solved. The method comprises the following steps: 1, feeding the corn straws into a pulverizer, feeding the pulverized straws into a high-speed vibrating sieve by using a centrifugal fan, and separating skin and pith by virtue of a cyclone separator to obtain corn straw skin raw materials; 2, dipping the corn straw skin raw materials in a NaOH solution; and 3, grinding the dipped corn straw skin raw materials by a double-roll mill to obtain the high-yield pulp for the corrugating base paper. By the method, high pulping yield is obtained under the condition of normal pressure in the whole process and the yield reaches above 75 percent. The method is applied in the field of the corrugating base paper.

Description

Technical field [0001] The invention relates to a preparation method of pulp for corrugated base paper. Background technique [0002] As a traditional and indispensable packaging container, corrugated boxes have been used for hundreds of years and are deeply favored. Corrugated cardboard is the raw material for making corrugated boxes, and corrugated base paper is one of the important components of corrugated cardboard. Corrugated base paper requires good fiber bonding strength, smooth paper surface, good tightness and stiffness, and a certain degree of elasticity to ensure that the finished carton has the ability of shock resistance and pressure resistance. The corrugated base paper currently produced is divided into 6 types according to the pulping mode: National Waste, US Waste + National Waste, US Waste + Straw Pulp, National Waste + Straw Pulp, US Waste + National Waste + Straw Pulp and Whole Straw Pulp. The production of high-strength corrugated base paper from #11 US was...

Claims

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Application Information

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IPC IPC(8): D21C5/00D21B1/02D21B1/06D21C3/02D21D1/28
CPCD21C5/00D21B1/025D21B1/06D21C3/02D21D1/28
Inventor 郑丁源岳金权张阳阳赵银玲
Owner NORTHEAST FORESTRY UNIVERSITY
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