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Continuous aramid fiber-reinforced polyformaldehyde material and preparation method thereof

A polyoxymethylene material, aramid fiber technology, applied in fiber processing, textile and paper making, physical processing, etc., can solve the problems of high gap sensitivity and limitations

Inactive Publication Date: 2014-05-07
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high sensitivity of the polyoxymethylene material to the gap, its application is limited

Method used

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  • Continuous aramid fiber-reinforced polyformaldehyde material and preparation method thereof
  • Continuous aramid fiber-reinforced polyformaldehyde material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] According to mass percentage, 60 parts of polyoxymethylene copolymer, 0.2 part of KH-550 coupling agent, 0.2 part of hindered phenolic antioxidant, 0.4 part of phosphite antioxidant, and 1 part of stearic acid lubricant are mixed together Mix evenly in the machine, then pour the mixture into the barrel of the extruder. 40 parts of continuous aramid fibers 1313 are dried in an oven at a temperature of 85° C., and then the continuous aramid fibers are passed through the die of the extruder, and the extruder is turned on at the same time. The processing temperature of the extruder barrel is 170-200°C. The extruder has eight sections in total, the first and second sections are 175°C, the third and fourth sections are 185°C, and the other sections are 195°C. The host screw speed is 210r.min -1 , the main feeding speed is 12r.min -1 . The continuous aramid fiber is fully impregnated by the molten resin in the die, and then extruded from the die, and then cooled, air-dried,...

Embodiment 2

[0012] According to mass percentage, 60 parts of polyoxymethylene copolymer, 0.5 part of KH-550 coupling agent, 0.2 part of hindered phenolic antioxidant, 0.4 part of phosphite antioxidant, and 1 part of stearic acid lubricant are mixed together Mix evenly in the machine, then pour the mixture into the barrel of the extruder. 40 parts of continuous aramid fibers 1414 were dried in an oven at a temperature of 85° C., and then the continuous aramid fibers were passed through the die of the extruder, and the extruder was turned on at the same time. The processing temperature of the extruder barrel is 170-200°C. The extruder has eight sections in total, the first and second sections are 175°C, the third and fourth sections are 185°C, and the other sections are 195°C. The host screw speed is 210r.min -1 , the main feeding speed is 12r.min -1 . The continuous aramid fiber is fully impregnated by the molten resin in the die, and then extruded from the die, and then cooled, air-dri...

Embodiment 3

[0014] According to the mass percentage, 60 parts of polyoxymethylene, 0.5 parts of KH-550 coupling agent, 0.2 parts of hindered phenolic antioxidant, 0.4 part of phosphite antioxidant, and 1 part of stearic acid lubricant are combined in the Mix well in the mixer, then pour the mixture into the barrel of the extruder. 40 parts of continuous aramid fibers 1313 were dried in an oven at a temperature of 85° C., and then the continuous aramid fibers were passed through the die of the extruder, and the extruder was turned on at the same time. The processing temperature of the extruder barrel is 170-200°C. The extruder has eight sections in total, the first and second sections are 175°C, the third and fourth sections are 185°C, and the other sections are 195°C. The host screw speed is 210r.min -1 , the main feeding speed is 12r.min -1 . The continuous aramid fiber is fully impregnated by the molten resin in the die, and then extruded from the die, and then cooled, air-dried, dra...

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Abstract

The invention provides a continuous aramid fiber-reinforced polyformaldehyde material and a preparation method thereof. The material comprises the following components according to a weight ratio: 40-60wt% of polyformaldehyde, 40-60% of aramid fiber, 0.2-0.6wt% of coupling reagent, 0.3-0.6wt% of antioxygen and 1.0-2.0wt% of lubricating agent. The preparation method comprises the following processing techniques: firstly blending the polyformaldehyde, the coupling reagent, the antioxygen and the lubricating agent; then adding the blend to a double-screw extruder to carry out melt extrusion through a special die head, wherein the processing temperature is 170-200 DEG C; carrying out preheating drying treatment on continuous aramid fiber; then converging with resin melt inside the die head, completely soaking a continuous aramid fiber bundle by the resin melt at a certain distance in the die head, and meanwhile coming out from the special die head; finally cooling, drying and dicing so as to obtain the continuous aramid fiber-reinforced polyformaldehyde material. The method is simple in process, easy to operate by production equipment and excellent in production performance.

Description

technical field [0001] The invention relates to a reinforced polyoxymethylene material, in particular to a continuous aramid fiber reinforced polyoxymethylene material and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Polyoxymethylene is a hard and dense material with a smooth and shiny surface, high strength and rigidity, good elasticity, and good friction and wear resistance. POM has excellent mechanical properties, and changes little with temperature, and its specific strength and specific stiffness are very close to those of metals. At the same time, polyoxymethylene has excellent electrical insulation, is almost not affected by temperature and humidity, the dielectric constant and dielectric loss change little in a wide range of temperature, humidity and frequency, and has excellent arc resistance, and can be used in Keep at high temperature. Its excellent comprehensive performance makes it widely used in many...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08L77/10C08J5/06D06M10/00B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92619B29C2948/92638B29C2948/92704B29C2948/92761B29C2948/9298
Inventor 王海波代汝军鲁建新
Owner HEILONGJIANG XINDA ENTERPRISE GRP