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Pulping equipment and pulping method for cow card paper

A kraft cardboard and equipment technology, which is applied in papermaking, waste paper processing, paper recycling, etc., can solve the problems of low production efficiency, increased wood pulp usage, wax spots and black spots on kraft cardboard that have not been completely resolved and other issues to achieve the effect of reducing production costs and saving labor costs

Active Publication Date: 2012-06-13
东莞理文造纸厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the production process, in order to reduce the current situation of wax spots and black spots in the kraft cardboard, before the kraft cardboard is made and fed, it is necessary to spend a lot of manpower to select the recycled waste paper, and to entrain the recycled waste paper The asphalt paper, wax paper, film paper and ink paper are selected, so that not only the production efficiency is low, but also the prepared kraft cardboard still has the appearance problem of wax spots and black spots
[0004] In order to solve the problem of the appearance of wax spots and black spots in kraft cardboard, some companies increase the thickness of the top layer to cover up the wax spots and black spots in the core layer when making the top layer of kraft cardboard. Made of wood pulp, increasing the thickness of the surface layer means increasing the amount of wood pulp used, which not only increases the production cost, but also has not completely solved the problem of the appearance of wax spots and black spots in kraft cardboard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of pulping equipment for kraft cardboard, including a pulper, roughing equipment, grading screen, long fiber processing equipment and short fiber processing equipment respectively installed on the frame; the pulper is connected with the roughing equipment, and the coarse The selection equipment is connected with the grading sieve, and the grading sieve is respectively connected with the long fiber processing equipment and the short fiber processing equipment;

[0031] Long fiber processing equipment includes selection equipment, thermal dispersion deinking machine, disc mill; selection equipment is connected with thermal dispersion deinking machine, thermal dispersion deinking machine is connected with disc mill;

[0032] Short fiber processing equipment includes low-concentration desander, light slag remover, and thermal dispersion deinking machine; low-concentration desander is connected with light slag remover, and light slag remover is connected with thermal d...

Embodiment 2

[0037] A kind of pulping method of kraft cardboard, comprises the following steps:

[0038] a. Pretreatment of waste paper: disintegrate the recovered waste paper into waste paper pulp by pulper, and then rough screen the pulp with a coarse screen whose aperture is 2.0mm;

[0039] b. Sorting long fibers and short fibers: further screen the coarsely selected pulp obtained in step a using a grading sieve, wherein the sieve width of the grading sieve is 0.15 mm, and the pulp with particles larger than 0.15 mm is used as long fibers , use the pulp with particles smaller than 0.15mm as short fibers;

[0040] c. Treatment of long fibers: the long fibers obtained in step b are first selected with a selection sieve, then processed with a thermal dispersion deinking machine, and then processed with a disc mill to obtain long fiber pulp, and finally the long fiber pulp is The material is used to make the bottom layer of kraft cardboard;

[0041] d. Treatment of short fibers: use a low...

Embodiment 3

[0049] Embodiment 2 of a pulping method for kraft cardboard of the present invention, the difference between this embodiment and embodiment 1 is that the consumption of short fiber pulp for making the surface layer of kraft cardboard is 40%; The amount of wood pulp used to make the top layer of kraft cardboard is 60%. Wherein, the amount of short fiber pulp in the surface layer can be designed according to actual needs. Other structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

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Abstract

The invention relates to the technical field of cow card paper manufacture, in particular to pulping equipment and a pulping method for cow card paper. The pulping equipment comprises a pulper, rough sizing equipment, a grading sieve, long fiber treating equipment and short fiber treating equipment, wherein the long fiber treating equipment comprises fine sizing equipment, a heat dispersion deinking machine and a dise mill; and the short fiber treating equipment comprises a low-concentration desander, a light slag remover and another heat dispersion deinking machine. The pulping method comprises the following steps: a, pretreating wastepaper; b, sorting long fiber and short fiber; c, treating long fiber; and d, treating short fiber. Wherein, long fiber pulp stock is used for making the bottom layer of the cow card paper; 100 percent of the sandwich layer of the cow card paper and 30 to 50 percent of the surface layer of the cow card paper are short fiber pulp stock; and the surface layer contains 50 to 70 percent of wood pulp. The invention radically solves the appearance problems of paraffin points and black spots in the cow card paper, and reduces the production cost of the cow card paper.

Description

technical field [0001] The invention relates to the technical field of kraft cardboard manufacturing, in particular to a kraft cardboard pulping equipment and a pulping method. Background technique [0002] The structure of kraft cardboard generally includes a surface layer, a core layer and a bottom layer. In the prior art, the surface layer is generally made of wood pulp, and the core layer and bottom layer are made of waste paper pulp. However, the recycled waste paper used for production usually contains bituminous paper, waxed paper, bonded paper and ink paper, and the above-mentioned waste paper contains pitch, wax, stickies and ink components. [0003] The existing kraft cardboard production process equipment and production methods are difficult to remove asphalt, wax, stickies and ink components in waste paper, so that there are a lot of wax spots and black spots in the core layer and bottom layer. Therefore, in the production process, in order to reduce the curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H15/10D21C5/02
CPCY02W30/64
Inventor 李运强
Owner 东莞理文造纸厂有限公司
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