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Production process for producing high-grade coated white manila board by using ONP (Old News Paper) pulp instead of DIP (Deinked Pulp) pulp

A production process and coating technology, which is applied in the direction of natural cellulose pulp/paper, paper, papermaking, etc., can solve the problems of low yield of advanced coated gray bottom white board paper pulp, high production cost, etc., and meet the cleanliness requirements Low, reduce the amount of use, improve the effect of pulp yield

Inactive Publication Date: 2018-12-21
LIANSHENG PAPER IND LONGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, it is necessary to provide a production process for ONP pulp to replace DIP pulp to produce advanced coated gray-bottomed whiteboard paper to solve the problems of low yield of advanced coated gray-bottomed whiteboard pulp and high production costs

Method used

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  • Production process for producing high-grade coated white manila board by using ONP (Old News Paper) pulp instead of DIP (Deinked Pulp) pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] see figure 1 , this embodiment provides a production process for ONP pulp instead of DIP pulp to produce advanced coated gray-bottomed white board paper, including the following steps:

[0039] Stock preparation:

[0040] Surface layer ONP pulp preparation: use ONP instead of DIP as raw material, prepare surface layer ONP pulp through waste paper deinking pulping line, the ONP deinked pulp has a freeness of 200csf, a whiteness value of 40ISO, and a content of impurity points of 800mm 2 / m 2 ;

[0041] Liner OCC stock preparation: use waste containerboard pulp as raw material, process it through OCC pulp line, and classify and screen out OCC medium fiber pulp, after being treated by heat removal and dispersion system, the stickies and oily wax in the pulp are effectively dispersed , the OCC medium fiber becomes liner OCC pulp after disc refining and refining, and the freeness of the liner OCC pulp is 230ml;

[0042] Using wood chips as raw materials, wood pulp is pro...

Embodiment 2

[0060] see figure 1 , this embodiment provides a production process for ONP pulp instead of DIP pulp to produce advanced coated gray-bottomed white board paper, including the following steps:

[0061] Stock preparation:

[0062] Surface layer ONP pulp preparation: use ONP instead of DIP as raw material, prepare surface layer ONP pulp through waste paper deinking pulping line, the ONP deinked pulp has a freeness of 220csf, a whiteness value of 45ISO, and a content of impurity points of 1000mm 2 / m 2 ;

[0063] Liner OCC stock preparation: use waste containerboard pulp as raw material, process it through OCC pulp line, and classify and screen out OCC medium fiber pulp, after being treated by heat removal and dispersion system, the stickies and oily wax in the pulp are effectively dispersed , the OCC medium fiber forms liner OCC pulp after disc refining and pulping, and the freeness of the liner OCC pulp is 248ml;

[0064] Using wood chips as raw materials, wood pulp is produ...

Embodiment 3

[0081] see figure 1 , the present embodiment provides a production method of ONP pulp instead of DIP pulp to produce high-grade coated gray-bottomed whiteboard, comprising the following steps:

[0082] Stock preparation:

[0083] Surface layer ONP pulp preparation: use ONP instead of DIP as raw material, prepare surface layer ONP pulp through waste paper deinking pulping line, the ONP deinked pulp has a freeness of 210csf, a whiteness value of 42ISO, and a content of impurity points of 900mm 2 / m 2 ;

[0084] Liner OCC stock preparation: waste containerboard pulp is used as raw material, processed through the OCC pulp production line, and the graded and screened OCC medium-fiber pulp is processed by the heat removal and dispersion system, and the stickies and oily wax in the stock are effectively dispersed , the OCC medium fiber becomes liner OCC pulp after disc refining and pulping, and the freeness of the liner OCC pulp is 249ml;

[0085] Using wood chips as raw material...

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Abstract

The invention provides a production process for producing high-grade coated white manila board by using ONP (Old News Paper) pulp instead of DIP (Deinked Pulp) pulp, relates to the technical field ofpulp paper production, and in particular to the production process for producing high-grade coated white manila board by using ONP pulp instead of DIP pulp. The high-grade coated white manila board isproduced by using the following process steps: using the ONP pulp as a surface layer, using an OCC (Old corrugated container) pulp as a lining layer, using a mixture of sawdust pulp and OCC staple fiber and filament fiber pulp as a core layer, and using OCC pulp middle-length fiber pulp as a bottom layer; performing base paper making via a net portion, a pressing portion, a pre-drying portion, asurface sizing portion, and a hard calendaring portion; coating the raw paper after the papermaking by pre-coating, curtain-coating, back-coating, and top-coating; and then being subjected to soft calendering, coiling, rewinding, and storing to a warehouse. The high-grade coated white manila board produced by the production process provided by the invention has the following properties: a whiteness of 70-72 ISO, a dirt count the paper surface of 30-60 mm<2> / m<2>, a surface strength (IGT) of 1.5 to 2.0 m / s, a glossiness of the finished paper of 40%, an ink absorbency of 26-28%, and a smoothnessof 130-150S, wherein the covering performance of the coated white manila board meets the quality requirements of traditional high-grade coated white manila board, and the coated white manila board can be offset as many as 4 or 5 times and can be folded as many as 15-20 times.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking production, in particular to a production process of using ONP pulp instead of DIP pulp to produce high-grade coated gray-bottom white board paper. Background technique [0002] At present, the production technology of high-grade coated gray-bottomed white board paper, due to the limitation of production technology and equipment, both imported and domestic office waste paper are used for the surface pulp and lining pulp, such as imported office waste 37# American waste, Japanese waste 3# and domestic office waste. The second white and floret of waste paper are processed by the waste paper deinking pulp processing line to obtain DIP deinking pulp with whiteness and cleanliness meeting the requirements. Both the surface layer pulp and the lining layer pulp use DIP office waste paper deinking pulp, sometimes The batter also uses 100% or partly bleached kraft wood pulp. Among them, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H15/10D21H11/00D21H11/14D21H23/70D21F11/00
CPCD21F11/00D21H11/00D21H11/14D21H15/10D21H23/70
Inventor 陈光军李全勇袁柳赵全虎李步文
Owner LIANSHENG PAPER IND LONGHAI
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