Layered composite aramid fiber paper and preparation method thereof

A technology of aramid fiber and aramid chopped fiber, which is applied in the field of papermaking and can solve problems such as foaming, high density, and poor air permeability

Inactive Publication Date: 2015-05-06
深圳昊天龙邦复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent adopts multi-layer wet papermaking and then composite molding, which effectively improves the mechanical strength and insulation performance of the paper. However, due to the high content of precipitated fibers and high density of the surface l

Method used

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  • Layered composite aramid fiber paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] [Example 1] Proportional configuration and preparation method of layered composite aramid fiber paper of the present invention

[0034] The scale configuration looks like this:

[0035] Top and bottom layers:

[0036] 1313 aramid chopped fiber (6mm) 75 parts by weight

[0037] 1313 aramid precipitated fiber 25 parts by weight

[0038] Core layer:

[0039] 1313 aramid chopped fiber (6mm) 25 parts by weight

[0040] 1313 aramid precipitated fiber 75 parts by weight

[0041] Preparation:

[0042] First, aramid chopped aramid fiber with a length of 6 mm and a fineness of 1.5 denier, that is, polym-phenylene isophthalamide fiber, is dispersed in water to form a slurry, and the mass concentration is 0.3%. Aramid chopped fiber slurry; then the aramid fibrids are dispersed and loosened in water, disc milled until the degree of percussion is 500SR, and aramid fibrous slurry with a mass concentration of 1% is made; then the above core layer Proportion Mix 1313 aramid chopp...

Embodiment 2

[0049] [Example 2] Proportional configuration and preparation method of layered composite aramid paper of the present invention

[0050] Top and bottom layers:

[0051] 1414 aramid chopped fiber (6mm) 75 parts by weight

[0052] 1313 aramid precipitated fiber 25 parts by weight

[0053] Core layer:

[0054] 1414 aramid chopped fiber (6mm) 25 parts by weight

[0055] 1313 aramid precipitated fiber 75 parts by weight

[0056] In this embodiment, aramid 1414 chopped fibers are used instead of 1313 chopped fibers, and the physical properties of the formed paper are as follows:

[0057] Quantitative: 41g / ㎡

[0058] Thickness: 0.050mm

[0059] Tensile strength 45N / cm

[0060] Dielectric strength 20KV / mm

Embodiment 3

[0061] [Example 3] Proportional configuration and preparation method of layered composite aramid paper of the present invention

[0062] Top and bottom layers:

[0063] 1313 aramid chopped fiber (6mm) 80 parts by weight

[0064] 1313 aramid precipitated fiber 20 parts by weight

[0065] Core layer:

[0066] 1313 aramid chopped fiber (6mm) 20 parts by weight

[0067] 1313 aramid fibrid fiber 80 parts by weight

[0068] Preparation:

[0069] Firstly, the length of aramid chopped fiber is 6mm, and the aramid fiber chopped fiber with a fineness of 2.0 denier, that is, polym-phenylene isophthalamide fiber, is dispersed in water to form a slurry, and the mass concentration is 0.5%. Aramid chopped fiber slurry; then disperse the aramid precipitated fiber in water, disc grind until the degree of percussion is 550SR, and make an aramid precipitated fiber slurry with a mass concentration of 1.5%; then use the above core layer ratio Mix 1313 aramid chopped fibers and 1313 aramid fi...

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Abstract

The invention provides aramid fiber paper which is composited in a multi-ratio layering manner and a preparation method of the aramid fiber paper. The layered composite aramid fiber paper comprises a surface layer, a core layer and a bottom layer, and is characterized in that the surface layer and the bottom layer are respectively made of following materials: 60 to 90 parts by weight of aramid fiber chopped fibers and 10 to 40 parts by weight of aramid fiber precipitation fibers; the core layer is made of the following materials: 5 to 40 parts by weight of aramid fiber chopped fibers and 60 to 95 parts by weight of aramid fiber precipitation fibers; the aramid fiber chopped fibers are meta-position aramid fibers or para-position aramid fibers with length being 6 to 10mm and fineness being 1 to 3 deniers; the aramid fiber precipitation fibers are irregular fibrous or thin-film fragmented meta-position aramid fibers; the surface layer and the bottom layer account for 40 to 80 percent of the weight of a piece of paper, and the core layer accounts for 20 to 60 percent of the weight of the piece of paper. By adopting the method, the mechanical performance, the insulation performance, the permeability and the specific surface area of a paper sample can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and relates to the papermaking technology of aramid fiber, in particular to the papermaking technology of special synthetic fiber paper. Background technique [0002] Aramid fiber paper is the most critical link in the industry chain of aramid composite materials. It is a kind of high temperature resistant synthetic fiber paper. It is usually made of aramid chopped fiber and aramid precipitated fiber mixed evenly, and then formed on the paper machine. It is made of paper, and then formed by high-temperature calendering. Because of its excellent thermal stability, flame retardancy, chemical stability and insulation properties, and its light weight and outstanding mechanical properties, it can be used as structural materials, motors, etc. Sheet insulation materials, heat insulation materials, packaging materials, honeycomb materials, etc., are widely used in aerospace, electronic transportation...

Claims

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Application Information

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IPC IPC(8): D21H13/26D21H15/10D21F11/00
Inventor 林德苗李敏肖东华陶琳
Owner 深圳昊天龙邦复合材料有限公司
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