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A kind of dyed paper and its preparation method and application

A technology for dyeing paper and dyeing pulp, applied in the field of dyeing, can solve the problems of poor dyeing effect, difficulty in dyeing, low mechanical properties, etc., and achieve the effects of good hygroscopicity, easy dyeing and low beating degree

Active Publication Date: 2021-07-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The primary purpose of the present invention is to overcome the existing problems of pulp dyeing difficulty, poor dyeing effect and low mechanical properties, and to provide a method for preparing dyed paper

Method used

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  • A kind of dyed paper and its preparation method and application
  • A kind of dyed paper and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Slurry preparation: tear up an appropriate amount of natural-color bamboo pulp and natural-color bagasse pulp (the absolute dry mass ratio of natural-color bamboo pulp and natural-color bagasse pulp is 6:4), add them into water and fully soak them, and decompose (decompose to pulp The fiber is dispersed, and there is no pulp lump, which can be decomposed by a conventional deflaker), then fished out and squeezed dry to balance the water (balance the water to make the moisture of each part of the decomposed pulp tend to be consistent), to obtain the mixed pulp, and set aside. Get a certain amount of mixed pulp, add viscose fiber that accounts for 2% of the quality of the mixed pulp (i.e. natural color bamboo pulp and natural color bagasse pulp), and then add toner (accounting for 5.8% black toner of the mixed pulp quality, 0.85% blue color powder) powder, 0.3% red toner), add water to a slurry concentration of 10% (mass fraction, the same below), and mix the slurry and...

Embodiment 2

[0062] (1) Slurry preparation: tear up an appropriate amount of natural-color bamboo pulp and natural-color bagasse pulp (the absolute dry mass ratio of natural-color bamboo pulp and natural-color bagasse pulp is 6:4), add them into water and fully soak them, and decompose (decompose to pulp fibers are dispersed, and no pulp clusters appear), then fish out and squeeze dry to balance the water to obtain mixed pulp for later use. Get a certain amount of mixed pulp, add viscose fiber accounting for 3% of the mixed pulp quality, then add toner (accounting for the black toner of 5.8% of the mixed pulp quality, the blue toner of 0.85%, the red toner of 0.3%), Add water to a slurry concentration of 10%, and mix the slurry and dye. Refining in a PFI refiner to obtain a dyed pulp with a beating degree of 30°SR.

[0063] (2) Preparation of dyed paper: take 4.0g (equivalent to 200g / m 2 Quantitatively) ground slurry, stirred at 45°C for 10 minutes, after stirring, added 10% color fixing...

Embodiment 3

[0065] (1) Slurry preparation: tear up an appropriate amount of natural-color bamboo pulp and natural-color bagasse pulp (the absolute dry mass ratio of natural-color bamboo pulp and natural-color bagasse pulp is 6:4), add them into water and fully soak them, and decompose (decompose to pulp fibers are dispersed, and no pulp clusters appear), then fish out and squeeze dry to balance the water to obtain mixed pulp for later use. Get a certain amount of mixed pulp, add viscose fiber accounting for 5% of the mixed pulp quality, then add toner (accounting for the black toner of 5.8% of the mixed pulp quality, the blue toner of 0.85%, the red toner of 0.3%), Add water to a slurry concentration of 10%, and mix the slurry and dye. Refining in a PFI refiner to obtain a beating degree of 25°SR for the dyed pulp.

[0066] (2) Preparation of dyed paper: take 4.0g (equivalent to 200g / m 2 Quantitatively) ground slurry, stirred at 65°C for 20 minutes, after stirring, added 15% color fixin...

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Abstract

The invention discloses a kind of dyed paper and its preparation method and application. The preparation method comprises the following steps: (1) shredding natural-color bamboo pulp and natural-color bagasse pulp, adding them into water to fully soak them, dissolving them, then pulling them out and squeezing them dry to obtain mixed pulp I; adding viscose fibers and dyes, and adding water Adjust the concentration of the slurry to 10±2% by mass, and then refine the pulp until the degree of beating is 15-30°SR to obtain the dyed slurry; (2) heat the dyed slurry to 45-80°C, and then add color-fixing agent, wet strength agent and sizing agent, and continue to stir evenly to obtain mixed slurry II; papermaking to obtain wet paper; finally, press, dry and calender the wet paper to obtain dyed paper. The invention adopts a series of fixing agent, wet strength agent and sizing agent under heating conditions to help the pulp coloring, improve the dyeing rate and color uniformity of the paper, reduce the decolorization of the paper, and endow the dyed paper with excellent mechanical properties , can realize industrialization.

Description

technical field [0001] The invention relates to the technical field of dyeing, in particular to a dyed paper and its preparation method and application. Background technique [0002] With the continuous improvement of living standards and the rapid development of social economy, the colors of paper used by people are becoming more and more abundant, and the uses are also becoming wider and wider. The paper color of dyed pulp is an important appearance index. In order to obtain the paper of the required color, two methods are usually used: internal pulp dyeing and surface dyeing. The appearance of dyeing effect is determined by many reasons. Improper dyeing process will cause problems such as light color, stain, uneven color and environmental pollution on the paper, which not only affects the normal production, but also reduces the quality of the product. [0003] The Chinese patent with the application number 201911242992.8 discloses a color fiber imitation leather paper an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/44D21H21/14D21H21/16D21H21/20
CPCD21H19/44D21H21/14D21H21/16D21H21/20
Inventor 吕晓萍杨仁党
Owner SOUTH CHINA UNIV OF TECH