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Preparation method for writing paper

A writing paper and pulping technology, which is applied in special paper, paper, papermaking, etc., can solve the problems such as the decline of writing effect, achieve the effects of increasing the amount of use, avoiding water strokes, and increasing the ash content

Active Publication Date: 2014-09-24
HAINAN JINHAI PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, once the writing manuscript encounters water, the coloring agent fixed on the medium will dissolve again and spread around with the flow of water, resulting in a decline in the writing effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation steps and physical properties of the writing paper in this example are as follows:

[0031] 1. Pulp making: use 100wt% bleached chemical pulp (Jinguang Group Jinhai Pulp Plant, model is eucalyptus AS), mechanical pulp 0%; the pulp is prepared through the processes of bulking, refining, and mixing. . Among them, the bleached chemical pulp is dispersed, refined, and formulated, and the mechanical pulp is dispersed, decomposed, and blended. By controlling the subsequent steps, 1 ton of paper is obtained for every 0.80 ton of slurry.

[0032] 2. Adding wet end chemicals: alkyl ketene dimer 10 kg / ton paper, filler 200 kg / ton paper, retention aids polyacrylamide and starch enhancers at 0.05 kg / ton paper and 5 kg / ton The amount of paper added.

[0033] 3. Surface sizing: Tapioca oxidized starch is used as surface sizing starch, and the dosage is 25 kg / ton paper. The surface sizing starch is added with cationic styrene-acrylate copolymer, and the addition amount is ...

Embodiment 2

[0037] The preparation steps and physical properties of the writing paper in this example are as follows:

[0038] 1. Pulping: using 20wt% bleached chemical pulp, 80wt% mechanical pulp (Meadow Lake, model BCTMP 350 / 75 / 70); the pulp is prepared through the processes of dispersing pulp, refining or decomposing with a refiner, and preparing the pulp. Slurry.

[0039] 2. Add wet end chemicals: alkyl ketene dimer 4 kg / ton paper, alkenyl succinic anhydride 1.0 kg / ton paper, filler 500 kg / ton paper, retention aids polyacrylamide and starch-based enhancers Add 0.5 kg / ton paper and 15 kg / ton paper

[0040] 3. Surface sizing: Corn oxidized starch is used as the surface sizing starch, and the dosage is 40 kg / ton paper. The surface sizing starch is added with the alkyl ketene dimer emulsion emulsified by cationic polymer, and the addition amount is 8 kg / ton. paper.

[0041] 4. Papermaking: The paper machine dryer is heated by steam to dry and curl into paper

[0042] 5. Physical properties: basi...

Embodiment 3

[0044] The preparation steps and physical properties of the writing paper in this example are as follows:

[0045] 1. Pulping: 50wt% bleached chemical pulp and 50wt% mechanical pulp are used; the pulp is prepared through the processes of dispersing pulp, refining or decomposing by a refiner, and preparing pulp. By controlling the subsequent steps, 1 ton of paper is obtained for every 0.75 ton of slurry.

[0046] 2. Add wet end chemicals: alkyl ketene dimer 4 kg / ton paper, alkenyl succinic anhydride 1.0 kg / ton paper, filler 350 kg / ton paper, retention aids polyacrylamide and starch-based enhancers Add 0.25 kg / ton paper and 10 kg / ton paper.

[0047] 3. Surface sizing: wheat enzyme-converted starch is used as surface sizing starch. The amount of surface sizing starch is 30 kg / ton paper. The cationic substance added in the surface sizing is polyamide polyurea resin, and the addition amount is 10 kg / ton. Tons of paper.

[0048] 4. Papermaking: the paper machine dryer is heated by steam t...

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Abstract

The invention brings forward a preparation method for writing paper. The preparation method comprises the following steps: 1) preparation of a pulp: a step of subjecting 0 to 100 parts of a bleached chemical pulp and 0 to 80 parts of a mechanical pulp to pulp dispersing, pulp refining or defibering and pulp batching so as to obtain the pulp; 2) addition of wet end chemicals, wherein the added wet end chemicals comprise an internal sizing agent, a filling material, a retention aid and a reinforcing agent; 3) surface sizing: a step of adding a surface sizing agent into a product obtained in step 2), wherein the surface sizing agent comprises a starch surface sizing agent and a cation surface sizing agent; and 4) papermaking: a step of subjecting a product obtained in step 3) to dehydration to prepare the paper. The method brought forward by the invention employs surface pretreatment technology and uses the cation surface sizing agent in the step of surface sizing, so the phenomenon of migration of dyes on the prepared writing paper is avoided, the usage amount of the mechanical pulp is increased and ash content in the paper is improved; thus, the purposes of conservation of the resource of trees and environmental protection are achieved.

Description

Technical field [0001] The invention belongs to the field of pulp mixtures, and specifically relates to a preparation method of writing paper. Background technique [0002] At present, there are many papers used as writing paper on the market. However, if end users use dye-based inks to write, they often have water strokes, especially when the ash content of the paper is high and the amount of mechanical pulp is high, the possibility of water strokes will be greater. Stroke is a phenomenon in which the dye migrates with the ink after writing, resulting in unclear handwriting and reduced writing effect. Inks are divided into dye-based inks and pigment-based inks. Dye-based inks have good color reproduction ability, but their prints have poor water resistance, while pigment inks have the opposite characteristics. They have good water resistance but color reproduction. Ability will be slightly worse. [0003] From a structural point of view, the dye colorant in the dye ink is comple...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/00D21H21/16
Inventor 陈汉彬李娟张家李
Owner HAINAN JINHAI PULP & PAPER