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Modified mineral fiber, its preparation method, and slurry applying the same

A mineral fiber and modification technology, which is applied in the field of modified mineral fiber pulp, can solve the problems of reducing paper quality, wearing paper machine cloth pipes, shortening service life, etc., and achieving the effect of reducing wear and tear.

Active Publication Date: 2014-01-15
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of mineral fibers will not only reduce paper quality, but also wear paper machine clothing, sizing rollers, pipelines and other equipment, resulting in shortened service life of equipment

Method used

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  • Modified mineral fiber, its preparation method, and slurry applying the same
  • Modified mineral fiber, its preparation method, and slurry applying the same
  • Modified mineral fiber, its preparation method, and slurry applying the same

Examples

Experimental program
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preparation example Construction

[0018] The preparation method of this modified mineral fiber, it comprises the steps:

[0019] (1) Prepare mineral fiber dispersion.

[0020] Take a certain amount of mineral fiber and add water to mix and disperse evenly to prepare a mineral fiber dispersion. Specifically, the mineral fibers can be inorganic fibers such as wollastonite, asbestos, and glass fibers. The zeta potential of this mineral fiber is negative. This step is not critical to the concentration of the mineral fiber dispersion.

[0021] (2) Prepare a negative charge compensator solution.

[0022] Take a certain amount of negative charge compensator and add water, stir evenly to prepare negative charge compensator solution. The negative charge compensator can enhance the negative charge of the mineral fiber, and it can specifically be a negatively charged anionic natural adhesive, a synthetic anionic polymer or sodium carboxymethylcellulose (CMC). The anionic natural adhesive can be guar gum, and the ani...

Embodiment 1

[0037] Prepare modified mineral fiber: configure mineral fiber (wollastonite) dispersion, add guar gum solution (temperature is 15°C, absolute dry mass is 0.01% of mineral fiber dry mass) to the above mineral fiber dispersion, and Stir for 10min; Add the above-mentioned mixed solution to the semi-cooked cationic starch solution (mass percentage concentration is 3%), the dry mass of the semi-cooked cationic starch is 6% of the dry mass of the mineral fiber, and keep the temperature of the mixed solution at Stir at a constant speed at 80°C for 5 minutes, then raise the temperature to 95°C and keep stirring for 10 minutes, control the heating time to 10 minutes, then lower the temperature to 40°C to prepare the modified mineral fiber.

[0038] Preparation of slurry: use the mixed slurry of NBKP slurry, LBKP slurry and APMP slurry, and the ratio of the slurry adopts a general ratio, wherein the mass ratio of NBKP slurry, LBKP slurry, and APMP slurry is 20:60:20, and different amoun...

Embodiment 2

[0043] Prepare modified mineral fiber: configure mineral fiber (wollastonite) dispersion, add guar gum solution (temperature is 30°C, dry mass is 0.05% of mineral fiber dry mass) to the above mineral fiber dispersion, and Stir for 5min; add the above-mentioned mixed solution to the semi-cooked cationic starch solution (mass percentage concentration is 2%), the absolute dry mass of the semi-cooked cationic starch is 3% of the dry mass of the mineral fiber, and keep the temperature of the mixed solution at Stir at a constant speed at 70°C for 30 minutes, then raise the temperature to 100°C and keep stirring for 15 minutes, control the heating time to 10 minutes, then lower the temperature to 30°C to prepare the modified mineral fiber.

[0044] Prepare slurry: refer to the method and steps of Example 1 to prepare slurry, and add the modified mineral fiber prepared in Example 2.

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Abstract

The invention provides a modified mineral fiber used in the papermaking field. The modified mineral fiber includes a mineral fiber, a negative charge compensation agent electrically adsorbed and cladded on the mineral fiber surface and cationic starch. The absolute dry mass of the negative charge compensation agent accounts for 0.01%-0.1% of the absolute dry mass of the mineral fiber, and the absolute dry mass of the cationic starch accounts for 0.01%-6% of the absolute dry mass of the mineral fiber, which has a negative zeta potential. The negative charge compensation agent can be a negative charge-carrying anionic natural adhesive, a synthesized anionic polymer or sodium carboxymethylcellulose. The invention also provides a preparation method of the modified mineral fiber, and a slurry applying the modified mineral fiber. By applying the modified mineral fiber used in the slurry, wear can be reduced significantly.

Description

technical field [0001] The invention relates to a modified mineral fiber used in the field of papermaking, a preparation method thereof, and a slurry using the modified mineral fiber. Background technique [0002] In the paper industry, adding mineral fiber to the slurry to replace part of the plant fiber can reduce the cost of paper making. However, the addition of mineral fibers will not only reduce paper quality, but also wear paper machine clothing, sizing rollers, pipelines and other equipment, resulting in shortened service life of equipment. No mineral fiber is added, the pulping abrasion (response to the degree of wear of the mineral fiber on the paper machine net, blanket, and sizing roller when the paper machine system is used) is 6mg-12mg, and the added quality is 3%-5% of the plant fiber quality After the mineral fiber is added, the consumption of pulping increases to 22mg, so the maximum added mass of general mineral fiber is 3% of the mass of plant fiber. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/50
Inventor 马兴虎穆永生
Owner GOLD EAST PAPER JIANGSU