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Novel energy-conserving environment-protecting complete-regeneration coating white cardboard and method for preparing same

An energy-saving and environment-friendly white cardboard technology, applied in papermaking, coating, paper coating, etc., to achieve the effects of reducing pulping pollution, saving wood resources, and improving resource utilization

Inactive Publication Date: 2008-12-31
ZHEJIANG YONGTAI PAPER IND GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, most of the domestic papermaking enterprises that use waste paper as raw material can only be used to produce lower-grade corrugated base paper, cardboard, etc.

Method used

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  • Novel energy-conserving environment-protecting complete-regeneration coating white cardboard and method for preparing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Specification: 787×1092mm.

[0029] (2) Weight: 300g / m 2

[0030] (3) Process flow:

[0031] a. Flour production (bleached and deinked pulp): use imported mixed office waste paper, and pass through chain conveyor, pulper, intermittent slag cleaner, high-concentration desander, coarse screen, pre-fine screen, Flotation deinking, rotary screen concentration, first thermal dispersion, high-concentration oxidation bleaching, first-stage three-stage fine screening, post-flotation deinking, first-stage four-stage low-concentration desanding, multi-disk filter, second stage Heat dispersion, medium consistency pump, up-flow reduction bleaching pipe, pulp storage tower, pulp distribution box, paper machine pulp tank, white water tank outside the machine (white water pump), four-stage conical desander, pulp pump, tail pulp Groove (the second section of the pressure screen), and finally sent to the headbox; the degree of knocking of the surface pulp is 45-55°SR.

[0032] b...

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Abstract

The invention relates to a coated white card board as well as the production method technique field. The novel energy-saving and environment-friendly complete regeneration coated white card board fully adopts reclaimed pulps. The coated white card board rationally uses imported waste paper and domestic waste paper to increase the resource utilization rate, and upgrades the technique in the coated white board industry so as to conform the industrial structure adjustment to the policy orientation. The coated white card board takes high quality waste paper which substitutes for chemical wood pulps and mechanical wood pulps as a raw material for production through treatments of sorting, pulping, deinking, screening and desanding and then mesh building, molding, calendering, coating, etc., and the produced coated white card board can save timber resources and reduce pulping pollution, as well as greatly reducing the consumption of water, steam and chemical raw materials.

Description

technical field [0001] The invention relates to the technical field of coated white cardboard and a production method thereof. Background technique [0002] The raw material of white cardboard is generally 100% bleached chemical wood pulp, the best of which is bleached coniferous kraft pulp, or partially bleached broadleaf kraft pulp. Most of them are composed of three-layer pulp, kraft wood pulp is used for the surface layer and bottom layer, and chemical mechanical groundwood pulp is used for the core layer. [0003] There is also a practice of adding a small amount of broken paper to the core layer in order to reduce costs. For example, the Chinese patent with the application number 200610012388.2 - "Core Dyeing Anti-counterfeiting Coated White Cardboard and Its Manufacturing Method", the cardboard is set as a multi-layer structure composed of three or more different paper webs; each layer of the cardboard is closely connected Composite as a whole, consolidated into a s...

Claims

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Application Information

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IPC IPC(8): D21H11/14D21H19/00D21H23/26
Inventor 孙柏贵陈献忠王建华孙雪明孙如祥
Owner ZHEJIANG YONGTAI PAPER IND GROUP
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