High-strength multi-layer kraft liner board and preparation method thereof

A kraft box, high-strength technology, applied in the field of papermaking, can solve the problem of reducing the amount of wood pulp

Pending Publication Date: 2021-07-06
JIAN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] This invention patent has the advantages of reducing the power consumption when beating per...

Method used

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  • High-strength multi-layer kraft liner board and preparation method thereof
  • High-strength multi-layer kraft liner board and preparation method thereof
  • High-strength multi-layer kraft liner board and preparation method thereof

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Embodiment 1

[0034] This embodiment provides a method for preparing high-strength multi-layer kraft liner board, such as figure 1 shown, including the following steps:

[0035] Step 1: Use waste paper as raw material, pulp it with a hydropulper, remove slag and coarse sieve, enter the fiber grading sieve, and sieve to obtain long-fiber pulp with a fiber length of 2.0-3.5mm, and the fiber length is 1.1-2.0mm medium fiber pulp and 0.8-1.1mm short fiber pulp;

[0036] Step 2: Mix the long-fiber pulp and the short-fiber pulp at a ratio of 80:20 by mass and number, add a reinforcing agent and a water-resistant agent in the pulp, and mix evenly to obtain the pulp for the surface layer. The short-fiber pulp and the medium After the fiber pulp is uniformly mixed in a ratio of 80:20 in parts by mass, the pulp for the core layer is obtained. After the medium fiber pulp and short fiber pulp are uniformly mixed in a ratio of 80:20 in parts by mass, the pulp for the bottom layer is obtained. , wherei...

Embodiment 2

[0042] This embodiment provides a method for preparing high-strength multi-layer kraft liner board, such as figure 1 shown, including the following steps:

[0043] Step 1: Use waste paper as raw material, pulp it with a hydropulper, remove slag and coarse sieve, enter the fiber grading sieve, and sieve to obtain long-fiber pulp with a fiber length of 2.0-3.5mm, and the fiber length is 1.1-2.0mm medium fiber pulp and 0.8-1.1mm short fiber pulp;

[0044] Step 2: Mix long-fiber pulp and short-fiber pulp at a ratio of 90:10 by mass and number, add a reinforcing agent and a water-resistant agent in the pulp, and mix evenly to obtain pulp for the surface layer. Mix short-fiber pulp and medium After the fiber pulp is uniformly mixed at a ratio of 85:15 in parts by mass, the pulp for the core layer is obtained. After the medium fiber pulp and short fiber pulp are uniformly mixed in a ratio of 85:15 in parts by mass, the pulp for the bottom layer is obtained. , wherein, the addition ...

Embodiment 3

[0050] This embodiment provides a method for preparing high-strength multi-layer kraft liner board, such as figure 1 shown, including the following steps:

[0051] Step 1: Use waste paper as raw material, pulp it with a hydropulper, remove slag and coarse sieve, enter the fiber grading sieve, and sieve to obtain long-fiber pulp with a fiber length of 2.0-3.5mm, and the fiber length is 1.1-2.0mm medium fiber pulp and 0.8-1.1mm short fiber pulp;

[0052] Step 2: Mix long-fiber pulp and short-fiber pulp at a ratio of 85:15 by mass and number, add a reinforcing agent and a water-resistant agent in the pulp, and mix evenly to obtain pulp for the surface layer. Mix short-fiber pulp and medium After the fiber pulp is uniformly mixed at a ratio of 83:17 in parts by mass, the pulp for the core layer is obtained. After the medium fiber pulp and short fiber pulp are uniformly mixed in a ratio of 82:18 in parts by mass, the pulp for the bottom layer is obtained. , wherein, the addition ...

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Abstract

The invention belongs to the technical field of papermaking, and particularly relates to a high-strength multi-layer kraft liner board and a preparation method thereof. The invention provides the high-strength multi-layer kraft liner board and the preparation method thereof, and aims to solve the problems that in the prior art, a waste paper pulping preparation mode is mostly directly adopted when the kraft liner board is prepared, the waste paper pulping preparation mode is not distinguished, the value of waste paper fibers cannot be utilized to the maximum extent, and the production cost is increased. The high-strength multi-layer kraft liner board comprises a surface layer and a bottom layer, at least one core layer is arranged between the surface layer and the bottom layer, the surface of one side, far away from the core layer, of the surface layer is coated with a front sizing layer, and the surface of one side, far away from the core layer, of the bottom layer is coated with a back sizing layer. A multi-layer structure is adopted, meanwhile, waste paper is graded into long fibers, middle fibers and short fibers by adopting a fiber grading technology, the surface layer, the bottom layer and the core layer of the paperboard are formed by respectively taking the long fibers, the middle fibers and the short fibers as main components, the value of the waste paper fibers is fully utilized, the strength is improved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a high-strength multi-layer kraft liner board and a preparation method thereof. Background technique [0002] With the development of society and the continuous improvement of people's living standards, the demand for kraft linerboard is also increasing, especially in the consumer goods industry that has high requirements for carton quality and printing. This increase in demand is also reflected in the demand for kraft The cardboard paper is of good quality and high grade. The uniformity indicators of kraft linerboard, such as banner weight, smoothness, and thickness, have a great influence on the quality of subsequent printing and coating processing. The better the base paper evenness, the more uniform the fiber arrangement, and the more uniform the strength and smoothness of the base paper. The better the quality of kraft cardboard, the higher the grade. There...

Claims

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Application Information

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IPC IPC(8): D21H27/10D21H27/30D21H11/14D21H15/02D21H15/06D21H17/17D21H17/25D21H17/55D21H17/05D21H17/66D21H21/16D21H21/18D21H19/24D21H19/14D21H19/18D21F11/00B32B29/00B32B29/06B32B7/12
CPCD21H27/10D21H27/30D21H11/14D21H15/02D21H15/06D21H17/17D21H17/25D21H17/55D21H17/05D21H17/66D21H21/16D21H21/18D21H19/24D21H19/14D21H19/18D21F11/00B32B29/005B32B29/06B32B7/12
Inventor 杨家万刘涛蔡赋涵刘少杰陈萍王承洪
Owner JIAN GRP
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