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Poly-fibre slurry cake pretreatment

A kind of aramid pulp, pretreatment technology, applied in the direction of fiber treatment, textile and papermaking, fiber type, etc., to achieve the effect of reducing surface energy

Inactive Publication Date: 2007-01-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method does not use organic solvents and will not pollute the environment

Method used

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  • Poly-fibre slurry cake pretreatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The composition of the formula is shown in Table 1. The specific preparation method is as follows: First, stir the AP in a closed high-speed mixer at high speed for 5 minutes, then add hollow glass microspheres, continue to stir at high speed for 5 minutes, and finally add lubricant, continue to stir at high speed for 10 minutes, and then AP complexes were obtained. Appearance There is no powder and liquid precipitation in the AP composite, which is a uniform and stable fiber composite. The scanning electron micrographs of the surface morphology of the AP fibers in the AP composite are shown in figure 2 ,Depend on figure 2 It can be seen that the AP microfibrils are effectively isolated by the hollow glass microspheres and the lubricant.

[0035] The AP compound is prepared with CR, NBR, HNBR, SBR or EPDM raw rubber to prepare composite materials. The formula and mixing process of the composite materials are the same as the above-mentioned "hot pressing film method"...

Embodiment 2

[0037] The formula composition is shown in Table 1, and the specific preparation method is the same as in Example 1. Appearance There is no powder and liquid precipitation in the AP composite, which is a uniform and stable fiber composite.

[0038] The AP compound and CR raw rubber are used to prepare composite materials. The formula and mixing process of the composite materials are the same as the above-mentioned "hot pressing film method". The speed is relatively fast; according to the "hot-pressed film method", the dispersion performance is evaluated as "excellent".

Embodiment 3

[0040] The formula composition is shown in Table 1, and the specific preparation method is the same as in Example 1. Appearance There is no powder and liquid precipitation in the AP composite, which is a uniform and stable fiber composite. The scanning electron micrographs of the surface morphology of the AP fibers in the AP composite are shown in image 3 ,Depend on image 3 It can be seen that the AP microfibrils are effectively isolated by the hollow glass microspheres and the lubricant.

[0041] The AP compound is prepared with CR, NBR, HNBR, SBR or EPDM raw rubber to prepare composite materials. The formula and mixing process of the composite materials are the same as the above-mentioned "hot pressing film method". There is no dust flying in the middle, and the fiber mixing and dispersion speed is relatively fast; according to the "hot-pressed film method", the dispersion performance evaluation is "excellent".

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Abstract

The aramid pulp pretreatment process in the present invention relates to a pretreatment process insulating the surface of aramid pulp fibres with isolation medium. The used isolation medium contains inorganic isolation powder and lubricant, the inorganic isolation powder is mixed with incompact aramid pulp mixture and then with lubricant to prepare aramid pulp composite. In every 100 weight parts of aramid pulp composite, there are 20-30 parts of aramid pulp, 37.5-62.5 parts of inorganic isolation powder, and 10-40 parts of lubricant. The inorganic isolation powder is hollow glass microbeads of 1250- 5000 mesh and the lubricant is phthalate ester compound. The prepared aramid pulp composite is a homogeneous and stable fibre composite, the aramid pulp fibres in it disperse well in the elastomer matrix facilitating the enhancement of the performance of the elastomer composite materials.

Description

technical field [0001] The invention relates to a method for pretreating the surface of aramid pulp, which is a pretreatment method for isolating the surface of aramid pulp fibers by using inorganic isolation powder and a lubricant. Background technique [0002] Aramid pulp (Aramid Pulp, hereinafter referred to as AP) is a product of aramid fiber surface fibrillation first developed by DuPont in the United States in 1984. It is mainly used as an ideal substitute fiber for asbestos, competing with glass fiber and carbon fiber. It is used in the fields of sealing materials, reinforcing materials and friction materials. AP has high modulus, high strength, high temperature resistance, wear resistance, chemical corrosion resistance, dimensional stability, etc. AP has a very unique fiber structure: AP main fiber (length 1-3 mm, diameter 10-20 microns) attached There are a large number of ultrafine microfibrils with diameters between nanoscale and micronscale (0.1-1 micron in diam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/00D06M101/36
Inventor 张立群吴卫东田明刘力曹建莉
Owner BEIJING UNIV OF CHEM TECH
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