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Preparation method of wollastonite long fiber for papermaking industry

A technology of wollastonite and long fiber, which is applied in the field of preparation of wollastonite long fiber, can solve the problems of high cost, difficult control of quality stability, high processing cost, etc., and achieve the effect of improving whiteness

Inactive Publication Date: 2013-12-25
CHENZHOU SIFANGLI INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current wollastonite long fibers are generally artificially synthesized modified wollastonite fibers. The cost of this method is high, which is as high as 10-20 times compared with the processing cost of natural wollastonite, and the processed products are mainly Used in high-end industries such as electronics, its general promotion and application are poor
In addition, in recent years, the technology of modifying wollastonite fiber by coupling agent has also appeared. The cost of wollastonite fiber produced by this technology is 3-10 times higher than the processing cost of natural wollastonite, and the product production process is complicated. The operation is difficult, and the quality stability is difficult to control. It has not been promoted yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of preparation method that is used for the wollastonite long fiber of papermaking industry described in this embodiment 1, its preparation steps are:

[0017] (1) Add 100g of distilled water into the flask, add 60g of ethylenediamine and 50g of oxalic acid into the flask, heat in a water bath at 65°C and stir, the speed of the stirrer is 80r / min, and react for 3h to obtain the modifier amide salt;

[0018] (2) Weigh 980g of natural wollastonite, pulverize to obtain primary products below 200 mesh, and then add 10g of B to these primary products 2 o 3 , the modified amide salt of 10g is pulverized into particles below 10 mm by a mill;

[0019] (3) The natural wollastonite primary product, B 2 o 3 These raw material powders and modified amide salt particles are put into the pool kiln and heated to 1500°C to melt;

[0020] (4) At the melting outlet, use 3 standard atmospheres of high-pressure air to blow into filaments, and the fibers obtained by filamentation e...

Embodiment 2

[0022] A kind of preparation method of the wollastonite long fiber that is used in papermaking industry of this embodiment 2, its preparation steps are:

[0023] (1) Add 100g of distilled water into the flask, add 60g of ethylenediamine and 50g of oxalic acid into the flask, heat in a water bath at 60°C and stir, the speed of the stirrer is 60r / min, and react for 3.5h to obtain the modifier amide salt;

[0024] (2) Weigh 980g of natural wollastonite, pulverize to obtain primary products below 200 mesh, and then add 10g of B to these primary products 2 o 3 , the modified amide salt of 10g is pulverized into particles below 10 mm by a mill;

[0025] (3) The natural wollastonite primary product, B 2 o 3 These raw material powders and modified amide salt particles are put into the pool kiln and heated to 1400°C to melt;

[0026] (4) At the melting outlet, use high-pressure air of 2 standard atmospheres to blow into filaments, and the fibers obtained by filamentation enter the ...

Embodiment 3

[0028] A kind of preparation method of the wollastonite long fiber that is used in papermaking industry of this embodiment 3, its preparation steps are:

[0029] (1) Add 100g of distilled water into the flask, add 60g of ethylenediamine and 50g of oxalic acid into the flask, heat in a water bath at 70°C and stir, the speed of the stirrer is 120r / min, and react for 4 hours to obtain the modifier amide salt;

[0030] (2) Weigh 980g of natural wollastonite, pulverize to obtain primary products below 200 mesh, and then add 10g of B to these primary products 2 o 3 , the modified amide salt of 10g is pulverized into particles below 10 mm by a mill;

[0031] (3) The natural wollastonite primary product, B 2 o 3 These raw material powders and modified amide salt particles are put into the pool kiln and heated to 1700°C to melt;

[0032] (4) At the melting outlet, use high-pressure air of 4 standard atmospheric pressures to blow into filaments, and the fibers obtained by filamentat...

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Abstract

The invention discloses a preparation method of wollastonite long fiber for papermaking industry. The preparation method comprises the following steps: (1) adding 60g of ethylenediamine and 50g of ethanedioic acid into 100g of distilled water, heating by a water bath to 60-70 DEG C, stirring, and reacting for 3-4 hours to obtain a modifier, namely an amide salt; (2) weighing 980g of natural wollastonite, crushing to obtain a primary product below 200 meshes, then adding 10g of B2O3 into the primary product, and crushing 10g of the modification amide salt to particles with the sizes below 10mm through a grinding machine; (3) pouring the raw materials into a tank furnace and heating to 1,400-1,700 DEG C for melting; and (4) blowing to form a wire by utilizing high-pressure air of 2-4 standard atmospheric pressures at a melting outlet, and enabling the fiber obtained by wire formation to enter a collector to obtain a wollastonite long fiber finished product. The wollastonite long fiber can improve the whiteness, the smoothness, the opacity and the printability of paper.

Description

technical field [0001] The invention relates to a preparation method of wollastonite long fibers used in the papermaking industry, in particular to a preparation method of wollastonite long fibers capable of reducing production costs and saving plant fibers. Background technique [0002] Wollastonite is a calcium metasilicate mineral, the chemical formula is CaSiO3, the theoretical chemical composition is CaO 48.3%, SiO 2 51.2%. Fibrous wollastonite has a chain structure and is needle-shaped. It has a high aspect ratio, good thermal and chemical stability, and high whiteness. Therefore, it exhibits some characteristics of fibers and can be used as a functional filler to partially replace pulp. fibers, reducing production costs. Different from traditional paper-making fillers, adding a certain amount of fibrous wollastonite does not significantly reduce the strength of paper, and can improve some performance indicators of paper, such as whiteness, opacity and printing adap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/38
Inventor 尹荔松黄韶葵
Owner CHENZHOU SIFANGLI INVESTMENT
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