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High-breakage-resistance multi-layer kraft board paper and preparation method thereof

A kraft box and cardboard technology, applied in the field of papermaking, can solve the problems 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

[0007] This invention patent has the advantages of reducing the power consumption when beating per ton of pulp and greatly reducing the amount of wood pulp, but it still does not solve the above problems

Method used

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  • High-breakage-resistance multi-layer kraft board paper and preparation method thereof
  • High-breakage-resistance multi-layer kraft board paper and preparation method thereof

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Embodiment 1

[0035] This embodiment provides a kind of preparation method of high breakage resistant multi-layer kraft liner paper, such as figure 1 shown, including the following steps:

[0036] Step 1: Using waste paper, waste paper pulpboard, and wood pulp board as raw materials, the waste paper and waste paper pulpboard are pulped by a hydraulic pulper, and after removing slag and rough sieving, enter the fiber classifying sieve, and sieve to obtain Long-fiber pulp with a fiber length of 2.0 or more, medium-fiber pulp with a fiber length of 1.1-2.0 mm, and short-fiber pulp with a fiber length of 1.1 mm or less. Wood pulp is formed after the impurity removal and double disc mill beating treatment;

[0037] Step 2: Mix long-fiber pulp and short-fiber pulp at a ratio of 80:20 in parts by mass to obtain waste paper pulp for the surface layer, and then mix the waste paper pulp and wood pulp for the surface layer at a ratio of 0:100 in parts by mass. Mix evenly to obtain pulp for the surfa...

Embodiment 2

[0043] This embodiment provides a kind of preparation method of high breakage resistant multi-layer kraft liner paper, such as figure 1 shown, including the following steps:

[0044] Step 1: Using waste paper, waste paper pulpboard, and wood pulp board as raw materials, the waste paper and waste paper pulpboard are pulped by a hydraulic pulper, and after removing slag and rough sieving, enter the fiber classifying sieve, and sieve to obtain Long-fiber pulp with a fiber length of 2.0 or more, medium-fiber pulp with a fiber length of 1.1-2.0 mm, and short-fiber pulp with a fiber length of 1.1 mm or less. Wood pulp is formed after the impurity removal and double disc mill beating treatment;

[0045] Step 2: Mix long-fiber pulp and short-fiber pulp at a ratio of 90:10 by mass to obtain surface layer waste paper pulp, and then mix the surface layer of waste paper pulp with wood pulp at a ratio of 90:10 by mass, Mix evenly to obtain pulp for the surface layer of wood pulp. After m...

Embodiment 3

[0051] This embodiment provides a kind of preparation method of high breakage resistant multi-layer kraft liner paper, such as figure 1 shown, including the following steps:

[0052] Step 1: Using waste paper, waste paper pulpboard, and wood pulp board as raw materials, the waste paper and waste paper pulpboard are pulped by a hydraulic pulper, and after removing slag and rough sieving, enter the fiber classifying sieve, and sieve to obtain Long-fiber pulp with a fiber length of 2.0 or more, medium-fiber pulp with a fiber length of 1.1-2.0 mm, and short-fiber pulp with a fiber length of 1.1 mm or less. Wood pulp is formed after the impurity removal and double disc mill beating treatment;

[0053] Step 2: Mix long-fiber pulp and short-fiber pulp at a ratio of 85:15 in parts by mass to obtain waste paper pulp for the surface layer, and then mix the waste paper pulp and wood pulp for the surface layer at a ratio of 50:50 in parts by mass. Mix evenly to obtain pulp for the surfa...

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Abstract

The invention belongs to the technical field of papermaking, and particularly relates to high-breakage-resistance multi-layer kraft board paper and a preparation method thereof. The invention provides high-breakage-resistance multi-layer kraft board paper 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 kraft paperboards are prepared, distinguishing is not carried out, the value of waste paper fibers cannot be utilized to the maximum extent, and the production cost is increased. The high-breakage-resistance multi-layer kraft board paper comprises a surface layer and a bottom layer, the surface layer is coated with a front surface sizing layer, the bottom layer is coated with a back surface sizing layer, and the total thickness of the surface layer and the bottom layer is more than five times of the total thickness of the front surface sizing layer and the back surface sizing layer. Wood pulp, long fibers, medium fibers and short fibers are respectively used as main components to form the surface layer and the bottom layer of the paperboard, so that the value of waste paper fibers is fully utilized, the fiber structure is optimized, the bursting index of kraft board paper products 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-breakage-resistant multi-layer kraft liner board and a preparation method thereof. Background technique [0002] The paper industry is a basic raw material industry for the national economy, which is significantly affected by economic growth. In recent years, affected by factors such as the downward pressure on economic growth, my country's paper industry has experienced slowdown or even negative growth. However, packaging such as container board paper and corrugated base paper Due to factors such as increasing downstream demand, paper consumption has maintained a good growth trend, with an average annual growth rate of 2% to 4%. Container board is one of the main paper types for carton paper. It is mainly bonded with corrugated paper cores to make corrugated cartons, which are mainly used for the outer packaging of household appliances, daily necessities, ...

Claims

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Application Information

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IPC IPC(8): D21H27/10D21H27/30D21H11/14D21H15/02D21H15/06D21H21/16D21H17/25D21H17/28D21H17/17D21H17/05D21H17/66D21H17/55D21H19/14D21H19/24D21H21/18D21C5/02D21F11/00B32B29/00B32B33/00
CPCD21H27/10D21H27/30D21H11/14D21H15/02D21H15/06D21H21/16D21H17/74D21H17/25D21H17/28D21H17/17D21H17/05D21H17/66D21H17/55D21H19/14D21H19/24D21H21/18D21C5/02D21F11/00B32B29/00B32B29/005B32B33/00B32B2250/26B32B2255/12B32B2255/26B32B2439/00B32B2307/7265Y02W30/64
Inventor 杨家万刘涛蔡赋涵姜艳春刘少杰贾灵波
Owner JIAN GRP
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