Method for producing corrugated paper with ultralow gram weight and high strength

A technology for corrugated base paper and production method, applied in pulp beating/refining method, paper, papermaking and other directions, can solve the problems of reducing fiber consumption, reducing cost, and large process investment, saving fiber consumption, reducing production costs, and improving economic effect

Inactive Publication Date: 2009-10-28
DONGGUAN NINE DRAGONS PAPER IND
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Problems solved by technology

[0007] In order to overcome the disadvantages of the existing corrugated base paper, such as low grade, poor strength, heavy grammage, incomplete treatment of sticky matter and hot-melt matter in waste paper, and large process investment, the present invention provides an ultra-low grammage high-strength corrugated The production method of base paper, which uses a combination of advanced pulping and papermaking processes, can completely use secondary fibers to produce super-quantitative high-strength corrugated base paper, thereby reducing fiber consumption, reducing costs, and creating economic benefits.

Method used

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  • Method for producing corrugated paper with ultralow gram weight and high strength

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Embodiment

[0040] 1. Ingredients: mix imported OCC with domestic OCC, imported OCC accounts for 40% of the total OCC by weight;

[0041] 2. Add water and disintegrate to make slurry: disintegrate the mixed waste paper in a hydropulper to make a high-concentration slurry;

[0042] 3. Slurry combination purification treatment: the high-concentration slurry is first sanded, coarsely screened to remove impurities, and then the long fibers and short fibers in the slurry are separated through a grading sieve, and the short fibers are screened to remove impurities through low-concentration; After the fiber is screened with low concentration for sand settling, and then finely screened to remove impurities, the long fiber is sent to the thermal dispersion system to disperse impurities such as stickies and hot melts.

[0043] 4. Medium-concentration beating: Adjust the concentration of the long-fiber pulp after thermal dispersion treatment to 5% by weight, and then send it to the disc mill for bea...

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Abstract

The invention discloses a method for producing corrugated paper with ultralow gram weight and high strength. The method comprises the following technological steps: 1) mixing; 2) addition of water for size degradation to prepare pulp; 3) pulp combination and purification treatment; 4) medium-concentration pulping; 5) addition of a chemical medicine system into the pulp; 6) twin-wire forming, water filtration and paper-making with the pulp; 7) three-stage squeezing dehydration; 8) prebaking and drying; 9) double-faced sizing; 10) postbaking and drying; and 11) coiling. The method utilizes pulping and paper-making process combination and completely utilizes secondary fiber to make the corrugated paper with ultralow gram weight and high strength so as to reduce the gram weight of the corrugated paper, save the fiber amount, reduce the production cost, and simultaneously reduce the energy consumption and the discharge capacity and improve the economic benefit.

Description

technical field [0001] The invention relates to a production method of ultra-low weight and high-strength corrugated base paper, which belongs to the technical field of corrugated base paper manufacturing in the papermaking industry. Background technique [0002] Corrugated paper is a common packaging paper and an important part of packaging paper. In recent years, the output of medium and high-grade cardboard in China has grown rapidly, and it is rare to see varieties whose consumption exceeds output. High-strength corrugated base paper is the most prominent one, and the market demand is huge. Judging from the current domestic production situation, corrugated base paper is generally produced by recycling ordinary waste paper or adding a small amount of other pulp. With the continuous increase of waste paper circulation, the fiber length and fiber properties have changed greatly, which will seriously affect the product quality, making the produced corrugated base paper low-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F11/12D21C3/22D21D5/02D21D1/30D21H17/17D21H17/66D21H17/68D21H21/10D21F3/04
Inventor 赵群柱刘名中张成飞尹显奇李松礼
Owner DONGGUAN NINE DRAGONS PAPER IND
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