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Production method of kraft cardboard with ultra low gram weight

A production method and technology of heavy kraft cardboard, which is applied in the production field of ultra-low grammage kraft paperboard, can solve problems such as heavy grammage, poor strength, and large process investment, achieve high vehicle speed, reduce production costs, and improve economic efficiency. benefit effect

Active Publication Date: 2015-04-15
DONGGUAN NINE DRAGONS PAPER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the low grade, poor strength, high pollution load of discharged sewage, heavy grammage, incomplete treatment of sticky matter and hot melt in waste paper, large process investment, etc. Insufficient, to provide a production method of ultra-low grammage kraft cardboard, this method utilizes the combination of pulping and papermaking processes, can completely use the secondary fiber to make ultra-low basis weight kraft cardboard, thereby reducing the fiber consumption, and the obtained Kraft cardboard has high strength and the weight is as low as 90g / m 2 , The speed of the vehicle is high, reducing sewage discharge, reducing costs and improving economic benefits

Method used

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  • Production method of kraft cardboard with ultra low gram weight
  • Production method of kraft cardboard with ultra low gram weight

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Experimental program
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Effect test

Embodiment 1

[0042] Such as figure 1 As shown, the ultra-low grammage kraft cardboard production method of the present embodiment comprises the following process steps:

[0043] 1) Ingredients; the ingredients mentioned are imported waste paper: domestic waste paper in the weight percentage of 40%: 60%. Imported waste paper includes American waste and European waste. American waste (AOCC) is one or both of 11#AOCC and 12#AOCC; European waste (EOOC) is one or both of A5 EOOC and A4 EOOC; Domestic waste paper (COCC) refers to used packaging cartons and cardboard recycled in the domestic market; imported waste paper with a weight percentage of 40% is one or a mixture of American waste or European waste. The ingredients in the present invention do not add any UKP wood pulp; the UKP wood pulp is kraft wood pulp refined from primary wood pulp, which mainly improves the indicators such as paper breakage resistance and ring pressure, and is expensive.

[0044] 2) Add water and disintegrate to m...

Embodiment 2

[0060] Such as figure 1 As shown, the ultra-low grammage kraft cardboard production method of the present embodiment comprises the following process steps:

[0061] 1) Ingredients; the ingredients mentioned are imported waste paper: domestic waste paper in a weight percentage of 50%: 50%. Imported waste paper includes American waste and European waste. American waste (AOCC) is one or both of 11#AOCC and 12#AOCC; European waste (EOOC) is one or both of A5 EOOC and A4 EOOC; Domestic waste paper (COCC) refers to used packaging cartons and cardboard recycled in the domestic market; imported waste paper with a weight percentage of 50% is one or a mixture of American waste or European waste. The ingredients in the present invention do not add any UKP wood pulp; the UKP wood pulp is kraft wood pulp refined from primary wood pulp, which mainly improves the indicators such as paper breakage resistance and ring pressure, and is expensive.

[0062] 2) Add water and disintegrate to make ...

Embodiment 3

[0078] like figure 1 As shown, the ultra-low grammage kraft cardboard production method of the present embodiment comprises the following process steps:

[0079] 1) Ingredients; the ingredients mentioned are imported waste paper: domestic waste paper in a weight percentage of 60%: 40%. Imported waste paper includes American waste and European waste. American waste (AOCC) is one or both of 11#AOCC and 12#AOCC; European waste (EOOC) is one or both of A5 EOOC and A4 EOOC; Domestic waste paper (COCC) refers to used packaging cartons and cardboard recycled in the domestic market; imported waste paper with a weight percentage of 60% is one or a mixture of American waste or European waste. The ingredients in the present invention do not add any UKP wood pulp; the UKP wood pulp is kraft wood pulp refined from primary wood pulp, which mainly improves the indicators such as paper breakage resistance and ring pressure, and is expensive.

[0080] 2) Add water and disintegrate to make s...

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Abstract

The invention relates to the technical field of papermaking methods, especially to a production method of a kraft cardboard with an ultra low gram weight. The method comprises the following technological steps of: conducting batching; adding water for disintegrating so as to obtain a slurry; carrying out combined purification treatment to the slurry; performing moderate concentration beating; adding a chemical system into the combined slurry; papermaking; molding filtration water for papermaking; implementing two-stage squeezing dewatering; conducting primary baking for drying; carrying out sizing; performing further baking for drying; implementing calendering; and conducting coiling. The invention effectively solves the problems of low grade, poor strength, high pollution load of discharged sewage, large gram weight, incomplete treatment to viscose materials and hot melt materials in waste paper, large process investment and other problems in existing kraft cardboards. The production method of a kraft cardboard with an ultra low gram weight in the invention makes use of a combined technology of pulping and papermaking, and fully utilizes secondary fibers to prepare a kraft cardboard with an ultra low gram weight through papermaking, so that the fiber consumption is reduced. And the prepared kraft cardboard has high strength and a gram weight of 90g / m<2>. The method provided in the invention has high vehicle operation speed, reduces production cost and energy consumption, decreases pollutant discharge, and enhances economic benefits.

Description

technical field [0001] The invention relates to the technical field of papermaking methods, in particular to a production method of ultra-low grammage kraft cardboard. Background technique [0002] Kraft linerboard is a kind of natural color linerboard made of natural wood pulp and waste paper, mainly including Nine Dragons linerboard and Dilong linerboard. Dilong linerboard and Nine Dragons linerboard are common packaging papers and are the main components of packaging paper. In recent years, the output of domestic medium and high-end cardboard has grown rapidly, and it is rare to see varieties that consume more than output. Dilong Kraft Linerboard and Nine Dragons Kraft Linerboard are the most prominent, and the market demand is huge. Judging from the current domestic production situation, kraft cardboard is generally 110 g / m 2 above. Because waste paper is used to produce kraft linerboard, the fiber length and fiber properties have changed greatly with the increase of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/14D21C5/02D21F9/00
CPCY02W30/64
Inventor 刘名中林新阳张益安覃文兴
Owner DONGGUAN NINE DRAGONS PAPER IND