Unlock instant, AI-driven research and patent intelligence for your innovation.

Aramid paper and its preparing method

A technology of aramid paper and aramid, applied in the field of papermaking, can solve the problems of poor electrical insulation performance, poor impregnation performance, affecting the electrical insulation performance of products, etc., and achieve the effects of deformation resistance, light weight, and high heat resistance.

Inactive Publication Date: 2009-06-03
ZHEJIANG KAN SPECIALITIES MATERIAL
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them (1) due to the presence of impurity ions, the electrical insulation performance is poor at high humidity, (2) since the binder is an organic resin, the resin will migrate to the surface of the paper during the production process, making the stability of the paper unsatisfactory. To ensure that the paper sheet in (3) is filled between the para-aramid short fibers due to the extremely fine fibrils in the para-aramid fiber, they are bonded to each other with the fibrids, so in When the mixed varnish impregnated with epoxy resin, its impregnation performance is not good, which affects the electrical insulation performance of the product. The product in (4) solves some problems well, but because it still contains organic resin and heat-resistant organic polymer The fiber is used as a binder, resulting in poor heat resistance and heat resistance dimensional stability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Aramid paper and its preparing method
  • Aramid paper and its preparing method
  • Aramid paper and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like figure 1 As shown, the meta-type aramid staple fiber provided by Guangdong Caijin Company is used, the length is 4mm, the thickness is 1.0 denier, and the specific surface area is 0.075m 2 / g, added to water, with a modified conical refiner (such as figure 2 shown) for beating, the conical angle of the conical refiner rotor 2 is 5° larger than the angle between the stator 1 and the shaft 4, the pressure at the slurry inlet 5 is 0.4Mpa, and the specific surface area of ​​the fiber after the filament is 7.5 m 2 / g, the slurry degree of gained slurry is 16 ° SR, pumps in the drift car, adds the quaternary ammonium salt of long-chain aliphatic hydrocarbon by the amount of absolute dry pulp 8%, regulates PH value=7, regulates slurry concentration to 4.5% , reacted for 3 hours, then turned on the bleacher and washed it with deionized water for 3 hours, and made paper using a fourdrinier paper machine, and the paper weight was 31g / m 2 . Then pass through a pair of me...

Embodiment 2

[0032] like figure 1 As shown, the meta-type aramid staple fiber provided by Guangdong Caijin Company is used, the length is 6mm, the thickness is 4.0 denier, and the specific surface area is 0.1m 2 / g, added to water, with a modified conical refiner (such as figure 2 shown) for beating, the conical angle of the conical refiner rotor 2 is 3° larger than the angle between the stator 1 and the shaft 4, the pressure of the slurry inlet 5 is 0.2Mpa, and the specific surface area of ​​the fiber after the filament is 12.5 m 2 / g, the slurry degree of gained slurry is 18 ° SR, pumps in the drift car, adds the quaternary ammonium salt of long-chain aliphatic hydrocarbon by the amount of absolute dry slurry 8%, adjusts PH value=7, adjusts slurry concentration to 4.5% , reacted for 3 hours, then turned on the drift car and washed it with deionized water for 3 hours, and made paper using a three cylinder wire machine. Then pass through a pair of metal rollers, the surface temperature...

Embodiment 3

[0034] like figure 1As shown, the meta-type aramid staple fiber provided by Guangdong Caijin Company is used, the length is 16mm, the thickness is 2.5 denier, and the specific surface area is 0.15m 2 / g, added to water, with a modified conical refiner (such as figure 2 shown) for beating, the conical angle of the conical refiner rotor 2 is 2° larger than the angle between the stator 1 and the shaft 4, the pressure at the slurry inlet 5 is 0.6Mpa, and the specific surface area of ​​the fiber after the filament is divided is 15m 2 / g, the slurry degree of gained slurry is 14 ° SR, pumps in the drift car, adds the quaternary ammonium salt of long-chain aliphatic hydrocarbon by the amount of absolute dry pulp 8%, adjusts PH value=7, adjusts slurry concentration to 4.5% .React for 3 hours, then turn on the drift car and wash it with deionized water for 3 hours, use a double fourdrinier paper machine to make paper, and then pass a pair of metal rollers. The surface temperature of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
specific surface areaaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

This invention relates to PPPA paper and a preparation method, in which, the PPPA paper is made by hot-pressing meta-aromatic PA fibers to formation to be bonded with each other and the length is 4mm-16mm, the thickness is 1.0-4.0 denier and at least an end face of said fiber is processed by sorting fibers.

Description

technical field [0001] The invention relates to papermaking technology, in particular to an aramid fiber paper and a preparation method thereof. Background technique [0002] It is well known that base materials for circuit laminates are required to have high heat resistance, heat-resistant dimensional stability, moisture-resistant dimensional stability, electrical insulation, deformation resistance, and light weight. Aramid fiber paper is excellent in heat resistance, heat-resistant dimensional stability, electrical insulation and is light in weight compared with other synthetic papers. Therefore, it is widely used in electromechanical appliances, transformer insulation and laminated circuit products. [0003] In this regard, multiple patent applications relate to this field, for example, (1) Japanese Unexamined Patent Publication No. 2-236907 and 2-106840, (2) Japanese Unexamined Patent Publication No. 1-92233, (3) Japanese Unexamined Patent Publication No. 1-92233, (3) J...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D21H13/26D21H27/00H05K1/03
Inventor 王东崔科丛
Owner ZHEJIANG KAN SPECIALITIES MATERIAL