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Modified mineral fiber and its preparation method, using the modified mineral fiber slurry

A mineral fiber and modification technology, applied to modified mineral fiber and its preparation, can solve the problems of lowering paper quality, shortening service life, and abrasion of paper machine wire felt pipes, etc., and achieves the effect of reducing abrasion

Active Publication Date: 2015-12-02
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 and its preparation method, using the modified mineral fiber slurry
  • Modified mineral fiber and its preparation method, using the modified mineral fiber slurry
  • Modified mineral fiber and its preparation method, using the modified mineral fiber slurry

Examples

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preparation example Construction

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

[0019] (1) Configure the mineral fiber dispersion.

[0020] A certain amount of mineral fibers is mixed with water and dispersed evenly to obtain a mineral fiber dispersion. Specifically, the mineral fibers may be inorganic fibers such as wollastonite, asbestos, and glass fibers. The zeta potential of this mineral fiber is negative. This step has no requirement on the concentration of the mineral fiber dispersion.

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

[0022] Take a certain amount of negative charge compensator and add water, stir evenly to obtain a negative charge compensator solution. The negative charge compensator can enhance the negative charge of mineral fibers, and it can specifically be negatively charged anionic natural adhesives, synthetic anionic polymers or sodium carboxymethyl cellulose (CMC). The anionic natural adhesive may be guar gum, and the ...

Embodiment 1

[0037] Preparation of modified mineral fiber: configure mineral fiber (wollastonite) dispersion, add guar gum solution (temperature is 15°C, absolute dry mass is 0.01% of the absolute dry mass of mineral fiber) to the above mineral fiber dispersion, uniform speed Stir for 10min; add above-mentioned mixed solution in semi-cooked cationic starch solution (mass percentage concentration is 3%), the absolute dry mass of this semi-cooked cationic starch is 6% of the absolute dry mass of mineral fiber, and keep the mixed solution temperature as The modified mineral fiber was prepared by stirring at a constant speed at 80°C for 5 minutes, then raising the temperature to 95°C and maintaining stirring for 10 minutes.

[0038] Preparation of slurry: use the mixed slurry of NBKP slurry, LBKP slurry and APMP slurry, and the proportion 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 amounts are added respecti...

Embodiment 2

[0043] Preparation of modified mineral fiber: configure mineral fiber (wollastonite) dispersion, add guar gum solution (temperature is 30°C, absolute dry mass is 0.05% of the absolute dry mass of mineral fiber) to the above mineral fiber dispersion, uniform speed Stir for 5min; add above-mentioned mixed solution in semi-cooked cationic starch solution (mass percentage concentration is 2%), the absolute dry mass of this semi-cooked cationic starch is 3% of the absolute dry mass of mineral fiber, and keep the mixed solution temperature as The modified mineral fiber was prepared by stirring at a constant speed for 30 min under the condition of 70 °C, then heating up to 100 °C and maintaining stirring for 15 min, controlling the heating time to 10 min, and then cooling down to 30 °C.

[0044] Slurry preparation: The slurry was prepared according to the method and steps of Example 1, and the modified mineral fiber prepared in Example 2 was added.

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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 papermaking field, a preparation method thereof, and a slurry using the modified mineral fiber. Background technique [0002] In the papermaking industry, adding mineral fibers to the pulp to replace part of the plant fibers can reduce the cost of papermaking. However, the addition of mineral fibers will not only reduce the quality of the paper, but also wear the equipment such as the paper machine clothing, sizing rolls, and pipelines, resulting in a shortened service life of the equipment. No mineral fiber is added, and the pulping wear (reaction of the wear degree of the mineral fiber to the paper machine wire, blanket, and sizing roll when the paper machine system is used) is 6mg-12mg, and the added mass is 3%-5% of the mass of the plant fiber. After the mineral fiber, the pulping attrition rises to 22mg, so the maximum added mass of the mineral fiber is generally 3% of the mass of the ...

Claims

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Application Information

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