Preparation process for manufacturing insulated paper by para position fiber and meta position fiber

A para-aramid fiber and preparation technology, which is applied in the field of preparation technology for para-aramid and meta-aramid fiber compounding insulating paper, to achieve the effects of improving physical strength and insulation performance, improving evenness, and improving softness

Inactive Publication Date: 2006-12-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports at home and abroad on the use of aramid 1414 fiber for papermaking. Therefore, it is a new topic to explore and optimize the papermaking process of aramid 1414 insulating paper.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1, at first the para-aramid chopped fibers with a length of 3mm are used at 60°C with a concentration of 1.2×10 -3 mol / L sodium dodecylbenzene sulfonate was washed for 10 minutes and then rinsed with clean water; secondly, the washed p-aramid chopped fibers were beaten in a PFI mill, the number of beating revolutions was 1000 rpm, and the beating gap was 0.3mm, the beating concentration is 10%, and gradually pressurized to 2.5kgf within 1000 revolutions; then the meta-aramid precipitated fiber is beaten in the PFI mill, the beating revolution is 3000 revolutions, and the beating gap is 0.3mm , the beating concentration is 8%, and the pressure is gradually increased to 2.5kgf within 1000 revolutions; the meta-aramid pulp and para-aramid pulp after beating are mixed in a mass ratio of 1:0.4, and the mass of the mixture is added 0.2% polyethylene oxide dispersant, adjust the mass concentration of the slurry to 0.02%, and use layered lamination papermaking; the pape...

Embodiment 2

[0008] Example 2, at first the para-aramid chopped fibers with a length of 4mm are used at 60°C with a concentration of 1.2×10 -3 mol / L sodium dodecylbenzene sulfonate was washed for 20 minutes and then rinsed with clean water; secondly, the washed p-aramid chopped fibers were beaten in a PFI mill, the number of beating revolutions was 2000, and the beating gap was 0.1mm, the beating concentration is 8%, and gradually pressurized to 2.5kgf within 1000 revolutions; then the meta-aramid precipitated fiber is beaten in the PFI mill, the beating revolution is 5000 revolutions, and the beating gap is 0.1mm , the beating concentration is 12%, and the pressure is gradually increased to 2.5kgf within 1000 revolutions; the meta-aramid pulp and para-aramid pulp after beating are mixed in a mass ratio of 1:0.8, and the mass of the mixture is added 0.3% polyethylene oxide dispersant, adjust the mass concentration of the slurry to 0.06%, and use layered lamination papermaking; the paper ob...

Embodiment 3

[0009] Embodiment 3, at first the p-aramid chopped fiber with a length of 5mm is used at 60°C with a concentration of 1.2×10 -3 mol / L sodium dodecylbenzene sulfonate was washed for 15 minutes and rinsed with clean water; secondly, the washed p-aramid chopped fibers were beaten in a PFI mill, the number of beating revolutions was 1500 rpm, and the beating interval was 0.2mm, the beating concentration is 6%, and gradually pressurized to 2.5kgf within 1000 revolutions; then the meta-aramid precipitated fiber is beaten in the PFI mill, the beating revolution is 1000 revolutions, and the beating gap is 0.2mm , the beating concentration is 5%, and the pressure is gradually increased to 2.5kgf within 1000 revolutions; the meta-aramid pulp and para-aramid pulp after beating are mixed in a mass ratio of 1:0.6, and the mass of the mixture is added 0.1% polyethylene oxide dispersant, adjust the mass concentration of the slurry to 0.04%, and use layered lamination papermaking; the paper o...

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Abstract

The invention discloses a manufacturing technology of copy-allocating insulated paper of para and meta aramid fiber, which comprises the following steps: adopting para-aramid chopped fiber and meta aramid pulp fiber to dispense insulated paper according to certain proportion; dispersing the fiber through PEC or congenic adjuvant; improving paper evenness and flexibility; proceeding heat pressing for para aramid fiber to modify physical strength and insulating property.

Description

technical field [0001] The invention belongs to the intersecting field of synthetic fiber industry and papermaking industry, and particularly relates to a preparation process of para-position and meta-position aramid fiber blended insulating paper. Background technique [0002] Aramid fiber can be divided into two main types according to its chemical structure: one is meta-aramid fiber characterized by heat resistance and flame retardancy, which is called aramid fiber 1313 in my country; the other is high-strength aramid fiber , High modulus of elasticity, para-aramid fiber characterized by heat resistance, called aramid fiber 1414 in my country. Both fibers include chopped fiber and pulp in two product forms. Aramid insulating paper produced from pure aramid 1313 chopped fibers and pulp fibers has excellent physical and mechanical properties, thermal stability, flame retardancy, electrical insulation and radiation resistance, and is a special fiber with high added value Pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/12D21H15/02D21H13/02
Inventor 张美云李金宝修慧娟吴养育池东明王建陆赵情罗清
Owner SHAANXI UNIV OF SCI & TECH
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