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Method for dyeing high weight paper product and application thereof

A dyeing method and technology for paper products, applied in the field of papermaking, can solve the problems that the product brightness and color saturation cannot meet the customer's requirements, the light scattering coefficient on the surface of the paper is small, and it is difficult to obtain ideal effects, etc. Strong covering power and easy operation

Inactive Publication Date: 2017-08-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the weight of the paper product is high, the thickness is large, and the light scattering coefficient on the surface of the paper is very small, the brightness and color saturation of the dyed product usually cannot meet the customer's requirements.
Especially for some dark-colored (black, etc.) papers, it is difficult to achieve the desired effect only by dyeing

Method used

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  • Method for dyeing high weight paper product and application thereof

Examples

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Comparison scheme
Effect test

preparation example Construction

[0028] (2) Preparation of dispersion: Take 60mL of deionized water in a 100mL beaker, add 0.78g of polyacrylate dispersant and 0.72g of propanol, stir with a magnetic stirrer at a speed of 700r / min to completely disperse, and then Add 6g of spare carbon black in step (1), continue to stir and mix evenly to obtain a dispersion.

[0029] (3) Add the above-mentioned dispersion into a ball mill jar, and grind for 12 hours with a planetary ball mill to obtain a color paste.

Embodiment 1

[0031] (1) Take an appropriate amount of hardwood pulp board, bamboo pulp board and bagasse pulp board, soak for more than 4 hours, shred, decompose for 3000r, squeeze the pulp, and measure the water content of the three pulp samples after 24 hours of equilibrium. Take the pulp sample equivalent to 30g of dry pulp in a 1000mL beaker according to the dry mass percentage of hardwood pulp:bamboo pulp:bagasse pulp: 30%:50%:20%.

[0032] (2) Take 1% spare color paste relative to the dry pulp mass in a beaker, dilute and disperse for future use.

[0033] (3) Add the dispersed pigment into the slurry, dilute the mixture to a concentration of 10% (relative to the absolute dry slurry sample), stir and mix evenly. Put the mixture into a PFI mill and refine it to a degree of freeness of 25°SR.

[0034] (4) Take the equivalent of 250g / m 2 Put the ground slurry required for quantitative paper into a 2000mL beaker, add 800mL of warm water at about 60°C, and dissolve it. Place the beaker ...

Embodiment 2

[0036] (1) Take an appropriate amount of hardwood pulp board, bamboo pulp board and bagasse pulp board, soak for more than 4 hours, shred, decompose for 3000r, squeeze the pulp, and measure the water content of the three pulp samples after 24 hours of equilibrium. Take the pulp sample equivalent to 30g dry pulp in a 1000mL beaker according to the dry mass percentage of hardwood pulp:bamboo pulp:bagasse pulp: 40%:40%:20%.

[0037] (2) Take 2% spare color paste relative to the dry pulp mass in a beaker, dilute, disperse and set aside.

[0038] (3) Add the dispersed pigment into the slurry, dilute the mixture to a concentration of 10% (relative to the absolute dry slurry sample), stir and mix evenly. Put the mixture into a PFI mill and refine it to a degree of freeness of 30°SR.

[0039] (4) Take the equivalent of 300g / m 2 Put the ground slurry required for quantitative paper into a 2000mL beaker, add 800mL of warm water at about 60°C, and dissolve it. Place the beaker on a ma...

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Abstract

The invention discloses a method for dyeing a high weight paper product and application thereof. The dyeing method comprises the following steps: adding color paste into slurry, diluting a mixture to 10wt%, and uniformly stirring and mixing; grinding the fiber-color paste mixture by adopting a PFI mill, taking the ground slurry, adding dyes and a dye-fixing agent for dyeing; and papermaking, squeezing, drying, thereby obtaining dark colored paper with high brightness. According to the method disclosed by the invention, the color paste and the dyes are used for dyeing together, the process is simple, and the operation is convenient. The color paste prepared by grinding and dispersing is high in light scattering coefficient and high in covering power, and after the color paste is added into the paper, the brightness of the dyed paper can be obviously increased, and when the color paste is combined with the dyes for dyeing, the saturation degree of the color is increased. According to a co-grinding form, the pigments are filled into fiber cell pits and cells, and the influence of the conventional pigment dyeing manner on the paper strength is reduced. Meanwhile, the bonding strength between the pigments and fibers can be increased, and the method can be well applied to high-weight high-thickness paper products such as cardboards and pulp molding products.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a dyeing method of high-weight paper products and an application thereof. Background technique [0002] High-weight paper products generally refer to paper products with a weight of more than 250g / m 2 Paper products generally include cardboard and pulp molded products, etc., which are mainly used for product packaging. At first, the primary color and white of pulp were the main colors of cardboard, pallets, precision electronic instrument packaging, etc., but with the improvement of people's living and cultural level and the constant pursuit of beauty, the requirements for packaging materials are getting higher and higher, which is not only reflected in packaging In terms of paper quality, there are also new requirements for appearance and color, and it has become an important technical indicator. [0003] At present, pulp dyeing mainly adopts pulp dyeing, and t...

Claims

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Application Information

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IPC IPC(8): D21H15/10D21H11/12D21F13/02D21H17/37D21H17/06D21H17/00D21H21/28
CPCD21F13/02D21H11/12D21H15/10D21H17/00D21H17/06D21H17/37D21H21/28
Inventor 杨仁党刘旭周晓明王阳
Owner SOUTH CHINA UNIV OF TECH
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