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Method for producing low basis weight newsprint by 100 percent deinking waste pulp added with retention and drainage agent

A retention and drainage aid, low quantitative technology, applied in the direction of adding non-fibrous pulp, processing waste paper, paper, etc., can solve the problems of opacity, tensile index and tear index not meeting the quality standards, etc. Achieve the effect of shortening drying time, saving production costs and reducing operating costs

Inactive Publication Date: 2008-07-23
GUANGDONG IND TECHN COLLEGE +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, the newsprint produced on the high-speed paper machine using 100% deinked waste newsprint is usually 47~49g / m2 sup>, the existing technology can only use 85% deinked waste paper pulp (DIP), 15% wood chip groundwood pulp (TMP) to produce 47 ~ 49g / m2 newsprint; or use 100% deinked waste paper pulp (DIP) produces 47-49g / m2 newsprint; if low-quantity newsprint is produced, the indicators such as opacity, tensile index and tear index often cannot be reached Quality Standard Requirements

Method used

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  • Method for producing low basis weight newsprint by 100 percent deinking waste pulp added with retention and drainage agent
  • Method for producing low basis weight newsprint by 100 percent deinking waste pulp added with retention and drainage agent
  • Method for producing low basis weight newsprint by 100 percent deinking waste pulp added with retention and drainage agent

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Effect test

Embodiment 1

[0022] As shown in Figure 1, adopt 100% deinking waste paper pulp (DIP) to add the method for ternary retention and drainage aid to produce low quantitative newsprint, comprise the steps:

[0023] In the pulp supply system of the high-speed paper machine adopted by the present invention, that is, the Metso OptiConcept horizontal sandwich paper machine (5300mm in width, 4800mm in clean paper width, and 1400 m / min in vehicle speed), there are pulp mixing tank, pulp tank and sand remover , degasser, sizing pump, vertical sieve, and headbox; add 100% (mass percentage) of deinked waste paper pulp (DIP) to the stock tank, and then add 1.5% (for absolute dry pulp) The fixing agent Cationfast PR8154 (produced by German BASF company) of calcium carbonate and 400PPM, at the entrance of the pulping tank, add the starch of 6kg / t paper; 1.0%; After desandering by desander and degassing by degasser, add 200PPM retention aid Polymin PR8193 (produced by German BASF company) at the outlet of s...

Embodiment 2

[0029] As shown in Figure 1, adopt 100% deinking waste paper pulp (DIP) to add the method for ternary retention and drainage aid to produce low quantitative newsprint, comprise the steps:

[0030] In the 100% (mass percentage) deinking waste paper pulp (DIP) in the pulping tank of the high-speed paper machine, add 1% (to the absolute dry pulp) of calcium carbonate and 100PPM of the fixative cationic modified polyamine CationfastPR8154, in the pulping At the entrance of the pool, add 4kg / t of paper starch; at the exit of the pulping pool, use white water under the net to flush the pulp, and the concentration of the net pulp is controlled at 1.0%; Add 100PPM retention aid cationic water-soluble polymer polyacrylamide derivative Polymin PR8193 at the outlet of the vertical sieve and the inlet of the vertical sieve; add 400PPM filter aid polyethyleneimine Polymin SK at the outlet of the vertical sieve; the pulp is sent to the high-speed The headbox of the paper machine can produce...

Embodiment 3

[0036] As shown in Figure 2, adopt 100% deinking waste paper pulp (DIP) to add the method for binary retention and drainage aid to produce low quantitative newsprint, comprise the steps:

[0037] Add 2% (relative to absolute dry pulp) calcium carbonate to 100% (mass percentage) deinked waste paper pulp (DIP) in the pulping tank of the high-speed paper machine, and add 8kg / t paper starch at the entrance of the pulping tank ; Use white water under the net to flush pulp at the outlet of the pulping tank, and the concentration of the net slurry is controlled at 1.0%; after desandering by the desander and degassing by the degasser, add 300PPM auxiliary Retention agent cationic water-soluble polymer polyacrylamide derivative Polymin PR8193; 800PPM filter aid polyethyleneimine Polymin SK is added at the outlet of the vertical sieve; the pulp is sent to the headbox of the high-speed paper machine, and can be produced 45g / m 2 Low basis weight newsprint. The quality indicators of the ...

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Abstract

The invention discloses a preparation method for low basis weight newsprint by using 100% de-inking waste paper pulp added with retention and filter aid, which comprises a plurality of steps: add 100% de-inking waste paper pulp into a proportioning tank of a high-speed paper machine; then add calcium carbonate and fixing cation modified polyamines; add starch at the entrance of a machine chest; use tray water to flush the pulp at the outlet of the machine chest; control the wite pulp concentration at 1.0%; after desanding and deaerating, add the retention aid cation water soluble macromolecule polyacrylamide derivative at the outlet of a sizing pump and the inlet of a vertical screen; add filter aid polyethylenimine at the outlet of the vertical screen; the pulp is sent into a head box of the high-speed paper machine; thus, the low basis weight newsprint can be produced. The preparation method for low basis weight newsprint by using 100% de-inking waste paper pulp added with retention and filter aid has the advantages that by adopting 100% de-inking waste paper pulp, the preparation method saves fiber material for making paper on the basis of changing the material structure of the newsprint, greatly reducing the consumption of timber, water and electricity and the emission of pollutant, relieving the environmental pollution and lowering the production cost.

Description

technical field [0001] The invention belongs to the field of environmental protection and resource utilization, in particular to a method for producing low-quantity newsprint by adding retention and drainage aids to 100% deinked waste paper pulp (DIP). Background technique [0002] Low-weight newsprint is an international high-end product, especially when 100% deinked waste newsprint pulp (DIP) is used to produce low-weight newsprint on a high-speed paper machine, it is necessary to add retention and drainage aids to prevent the loss of fine fibers and fillers in the pulp; Reduce the concentration of white water under the wire, increase the dryness entering the press section, reduce the steam consumption in the drying section, increase the drainage rate of pulp, and adapt to the operation of high-speed paper machines. [0003] At present, the usual weight of newsprint produced on a high-speed paper machine using 100% deinked waste newsprint is 47-49g / m 2 , the existing tech...

Claims

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Application Information

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IPC IPC(8): D21C5/02D21H17/55D21H17/35D21H17/28D21H17/56D21H11/14
CPCY02W30/64
Inventor 郭纬林润惠蒋鹏陈旭祁红影邹哲明张棽云娜曾丽美
Owner GUANGDONG IND TECHN COLLEGE
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