Dyed paper as well as preparation method and application thereof

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

Active Publication Date: 2020-11-13
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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  • Dyed paper as well as preparation method and application thereof
  • Dyed paper as well as preparation method and application thereof

Examples

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 dyed paper as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) shredding natural-color bamboo pulp and natural-color bagasse pulp, adding the shredded natural-color bamboo pulp and natural-color bagasse pulp into water, fully soaking, defibering, fishing out, squeezing to obtain mixed pulp I, adding viscose fibers and a dye, adding water to adjust the concentration of the pulp to 10 +/-2 mass%, and grinding the pulp until the beating degree is 15-30 degrees SR to obtain dyed pulp; (2) heating the dyed pulp to 45-80 DEG C, then sequentially adding a color fixing agent, a wet strength agent and a sizing agent, and continuously stirring uniformly to obtain mixed pulp II; carrying out papermaking to obtain wet paper sheets; and finally, squeezing, drying and calendaring the wet paper sheets to obtain the dyed paper. A series of color fixing agents, wet strength agents and sizing agents are adopted underthe heating condition, paper pulp coloring is facilitated, the dye-uptake rate and color uniformity of paper are improved, paper de-coloration is reduced, dyed paper is endowed with an excellent mechanical performance, and industrialization can be achieved.

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 Applications(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
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