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Production method of craft paper with high smoothness

A production method and a technology for kraft paperboard, applied in the field of papermaking technology, can solve the problem of low surface smoothness of kraft paperboard, and achieve the effects of high smoothness, improved smoothness, and increased bonding force

Inactive Publication Date: 2020-11-17
NINE DRAGONS PAPER IND TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for producing kraft cardboard with high smoothness to solve the problems raised in the above-mentioned background technology. degree and make the fibers fully divided in the alkaline beating process, and solve the problem of low surface smoothness of kraft cardboard

Method used

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  • Production method of craft paper with high smoothness

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for producing kraft cardboard with high smoothness, comprising the following processes:

[0035] (1) Waste paper treatment process

[0036] a. Pulping: Put the waste paper into the pulper to get waste paper pulp; the waste paper is container board (OCC), which can be Chinese waste paper, American waste paper or European waste paper, so as to reduce wood pulp The use of materials can effectively reduce the manufacturing cost of enterprises, save resources and reduce damage to the environment.

[0037] b. Purification and sieving: the waste paper pulp is passed through a high-concentration slag remover, a coarse screen, and a classifying screen in sequence to obtain long-fiber pulp, medium-fiber pulp and short-fiber pulp. Among them, the high-concentration deslagging machine can effectively remove impurities such as sand, glass, screws, steel needles, staples, and metal flakes in the waste paper slurry, and the coarse sieve can further screen out impurities, imp...

Embodiment 2

[0048] Except that the following are different from Example 1, others are the same as Example 1:

[0049] The dilute lye used in the above process is potassium hydroxide solution with a mass fraction of 6%; in the long fiber swelling alkaline beating process, the long fiber slurry is soaked in dilute lye for 1.5 hours; the medium fiber swelling alkaline beating During the treatment, the medium fiber slurry was soaked in dilute alkali solution for 1 hour; in the wood pulp fiber swelling alkaline beating treatment, the wood pulp slurry was soaked in dilute alkali solution for 0.75 hours; the long fiber in the long fiber slurry The length is 0.18mm, the length of medium fiber in medium fiber pulp is 0.15mm, the length of short fiber in short fiber pulp is 0.11mm; the length of fiber in fine wood pulp is 0.08mm; (1) The mass percentage of medium fiber refined pulp prepared by process (2) and wood pulp refined pulp prepared by process (2) is 20%: 80%; The mass percentage of pulp a...

Embodiment 3

[0051] Except that the following are different from Example 1, others are the same as Example 1:

[0052] The dilute lye used in the above process is potassium hydroxide solution with a mass fraction of 4%; in the long fiber swelling alkaline beating process, the long fiber slurry is soaked in dilute lye for 1 hour; the medium fiber swelling alkaline beating During the treatment, the medium fiber pulp was soaked in dilute alkali solution for 0.5 hours; in the wood pulp fiber swelling alkaline beating treatment, the wood pulp pulp was soaked in dilute alkali solution for 0.5 hours; the long fiber in the long fiber pulp The length is 0.20mm, the length of medium fiber in medium fiber pulp is 0.17mm, the length of short fiber in short fiber pulp is 0.13mm; the length of fiber in fine wood pulp is 0.10mm; (1) The mass percentage of medium fiber refined pulp prepared by process (2) and wood pulp refined pulp prepared by process (2) is 25%: 75%; The mass percentage of uniform mixin...

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Abstract

The invention discloses a method for producing craft paper with high smoothness. The method comprises the following procedures of: (1) a waste paper treatment procedure; (2) a wood pulp treatment procedure; and (3) a net papermaking procedure. In the procedure (1), waste paper pulp is subjected to impurity removal and grading so as to obtain long fiber pulp, medium fiber pulp and short fiber pulp;in the procedure (2), repulping is conducted to obtain wood pulp, the long fiber pulp, the medium fiber pulp and the wood pulp are soaked in dilute alkali liquor, and different types of abrasive discs for disc milling are prepared under an alkaline condition to obtain corresponding refined pulp; the refined medium fiber pulp is mixed with the refined wood pulp to obtain surface-layer pulp, and the refined short fiber pulp is mixed with the refined long fiber pulp to obtain core-layer pulp and bottom-layer pulp; paper manufacturing with the pulp is conducted in a triassic mesh mode; and finally, squeezing, drying, calendaring, reeling, rewinding and packaging are sequentially performed to obtain a finished product. In the process of pressing, the surface of coarse cotton cloth contains a modal fiber layer, and shape memory fibers are wrapped in the modal fiber layer. The production method effectively improves the smoothness of the craft paper.

Description

technical field [0001] The invention relates to the technical field of papermaking technology, in particular to a method for producing kraft cardboard with high smoothness. Background technique [0002] Kraft linerboard, also known as pickup cardboard, coated kraft linerboard, liner linerboard, kraft paper. White-faced kraft linerboard, one is kraft linerboard with bleached wood pulp and the other is surface-coated kraftboardboard. White-faced kraft cardboard is a variety of whiteboard paper, and it is also a variety of single-sided whiteboard paper. White-faced kraft cardboard has high whiteness on one side, high anti-explosion, high tear resistance and anti-damage properties. It can replace corrugated cardboard packaging. It is a mid-range packaging paper and is widely used in auto parts, household appliances, cosmetic boxes, and hardware. and tool packaging. White kraft cardboard usually includes a surface layer, a lining layer and a bottom layer. Due to the layered st...

Claims

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Application Information

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IPC IPC(8): D21H27/10D21H11/14D21H15/06D21H15/02D21F11/04D21H17/64
CPCD21H27/10D21H11/14D21H15/06D21H15/02D21F11/04D21H17/64
Inventor 贺康李栋陈全科
Owner NINE DRAGONS PAPER IND TIANJIN
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