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Long basalt fiber reinforced PA6 composite material and melt impregnation preparation method thereof

A technology of basalt fiber and composite materials, applied in the field of composite materials, can solve the problems of increased manufacturing cost, high price of carbon fiber, and glass fiber reinforced PA can not fully meet the performance of use, so as to achieve excellent mechanical properties and friction and wear properties, and solve performance defects , The effect of simple processing method

Active Publication Date: 2016-06-22
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large number of reinforcement and modification of PA have been carried out at home and abroad. The modification methods mostly use glass fiber and carbon fiber as reinforcement materials. However, glass fiber reinforced PA cannot fully meet the requirements of performance, and carbon fiber is expensive, resulting in increased manufacturing costs. Urgent research and development of new reinforcing fiber and its composite material preparation technology

Method used

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  • Long basalt fiber reinforced PA6 composite material and melt impregnation preparation method thereof
  • Long basalt fiber reinforced PA6 composite material and melt impregnation preparation method thereof
  • Long basalt fiber reinforced PA6 composite material and melt impregnation preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The fiber bundle is drawn out from the long fiber roll 2 on the support 1 and unrolled, and the guide roller 3 and the limit guide roller 4 are introduced into the temperature-controlling impregnation mold 6, and the supporting extruder 5 is connected with the temperature-control impregnation mold 6, Extruder 5 extrudes PA6 (80wt%) and γ-aminopropyltriethoxysilane (5wt%) into the temperature-controlling impregnation mold 6 (there are 2 impregnation rollers 7), and the temperature-control impregnation mold 6 The temperature was adjusted to 250° C., and the speed of the pulling roller 10 was set to 35 mm / s, so that the content of long basalt fibers was 15 wt%. The impregnated fiber bundles are introduced into the cooling water tank 8 for cooling, granulated in the pelletizer 11, and dried to obtain the long basalt fiber reinforced PA6 composite material. The resulting composite material was injection molded to obtain a standard sample, and the mechanical and friction and ...

Embodiment 2

[0020] The fiber bundle is drawn out from the long fiber roll 2 on the support 1 and unrolled, and the guide roller 3 and the limit guide roller 4 are introduced into the temperature-controlling impregnation mold 6, and the supporting extruder 5 is connected with the temperature-control impregnation mold 6, The extruder 5 extrudes PA6 (48wt%) and γ-glycidyl etheroxypropyl trimethoxysilane (2wt%) into the temperature-controlling dipping mold 6 (there are 5 dipping rollers 7 in total), and the temperature-controlling dipping mold The temperature of 6 is adjusted to 235° C., and the speed of the pulling roller 10 is set to 16 mm / s, so that the content of long basalt fibers is 50 wt%. The impregnated fiber bundles are introduced into the cooling water tank 8 for cooling, granulated in the pelletizer 11, and dried to obtain the long basalt fiber reinforced PA6 composite material. The resulting composite material was injection molded to obtain a standard sample, and the mechanical a...

Embodiment 3

[0022] The fiber bundle is drawn out from the long fiber roll 2 on the support 1 and unrolled, and the guide roller 3 and the limit guide roller 4 are introduced into the temperature-controlling impregnation mold 6, and the supporting extruder 5 is connected with the temperature-control impregnation mold 6, Extruder 5 extrudes PA6 (48wt%) and γ-isocyanate propyltriethoxysilane (3wt%) into temperature-controlling dipping mold 6 (there are 8 dipping rollers 7, and temperature-controlling dipping mold 6 The temperature is adjusted to 230 ℃, the speed of the traction roller 10 is set to 10mm / s, so that the content of long basalt fiber is 49wt%.The fiber bundle after impregnation is imported and cooled by cooling water tank 8, in pelletizer 11 Granulate, dry, then obtain long basalt fiber reinforced PA6 composite material. Gained composite material is injection-molded to obtain standard sample, and test obtains the mechanics and the friction and wear performance of composite materia...

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Abstract

The invention belongs to the field of composite materials, and in particular relates to a long basalt fiber reinforced PA6 composite material and a melt impregnation preparation method thereof. The composite material is prepared from the following raw materials by weight percent: 15 to 50 percent of long basalt fibers, 48 to 80 percent of PA6 master batch and 2 to 5 percent of processing additive; and the processing additive is a silane coupling agent. Compared with the prior art, the melt impregnation preparation method of the long basalt fiber reinforced PA6 composite material realizes sufficient impregnation of the resin to the fibers by virtue of a concave-convex wheel structure of an impregnation roll and can realize the precise control to the melt temperature by combining a temperature control device of an impregnation mold. According to the long basalt fiber reinforced PA6 composite material prepared by the method, the fibers and a resin matrix are closely combined, and the mechanical performance and the friction abrasion performance are excellent, so that the performance deficiency of the PA6 matrix can be solved, the reinforcing effect and the cost performance advantages of the basalt fibers can be sufficiently realized, the processing method is simple, and the industrialized application prospect is wide.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a long basalt fiber reinforced PA6 composite material and a preparation method thereof by melt impregnation. Background technique [0002] As one of the four major engineering plastics, nylon (PA) has the advantages of high strength, high wear resistance, oil resistance, weak acid resistance, self-lubrication, insulation and easy processing. It is widely used in automobiles, machinery, electrical appliances, construction, light industry, etc. industry. However, PA has high hygroscopicity, poor dimensional stability of products, and far less strength and rigidity than metals. In some special applications, such as mining machinery, transmission equipment, transmission parts, etc., the wear resistance is seriously insufficient. The current concept of energy conservation and environmental protection is deeply rooted in the hearts of the people, and the replacement of steel with pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K7/10B29C70/50
CPCB29C70/50C08K7/10C08L77/02
Inventor 赵贵哲周少锋王辉刘亚青
Owner ZHONGBEI UNIV
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