Continuous long glass fiber reinforced PBT composite material and preparation method thereof

A composite material and long glass fiber technology, which is applied in the field of continuous long glass fiber modified and reinforced PBT composite materials and its preparation, can solve the problems of demanding performance requirements of composite materials, application limitations of short fiber reinforced PBT composite materials, etc., and achieve enhanced Impregnation effect, improvement of surface finish, good effect of temperature resistance

Inactive Publication Date: 2015-11-18
JIANGYIN POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of social industry, the performance requirements of composite materials are becoming more and more stringent, and the application of short fiber reinforced PBT composite materials is also subject to certain restrictions.

Method used

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  • Continuous long glass fiber reinforced PBT composite material and preparation method thereof
  • Continuous long glass fiber reinforced PBT composite material and preparation method thereof

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Experimental program
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preparation example Construction

[0023] The preparation method of the long glass fiber reinforced PBT composite material in this embodiment includes the following steps: (1) adding PBT resin, flow modifier, toughening agent, nucleating agent, antioxidant, lubricant and POE component Make it fully mixed in the mixer;

[0024] (2) Add the above mixture into the twin-screw extruder through the feeding port, set the extrusion temperature at 200-235°C, set the temperature of the long glass fiber impregnating head at 230-250°C, and the material in the extruder The residence time is 3-8min, and the speed of the host is controlled at 250-350r·min -1 , the PBT molten primer is injected into the impregnation chamber of the long glass fiber impregnation head by co-rotating twin-screws;

[0025] (3) The long glass fiber is preheated and dried through a 70-80°C hot air pipe, and the long glass fiber is coated on the surface of the glass fiber in an aqueous solution with aminosilane or 3-aminopropyltrihydroxysilane during...

Embodiment 1

[0031] According to mass fraction, 73 parts of PBT (intrinsic viscosity is 1.0dL / g), 3 parts of CBT100, 2 parts of PTW, 1 part of sodium benzoate, 0.1 part of antioxidant 1076, 0.2 part of antioxidant 168, 0.4 part of silicone Mix the powder evenly in a mixer; put it into a twin-screw extruder, inject it into a long glass fiber impregnation head after melting, set the temperature of the extruder at 220-230°C, and set the temperature of the impregnation head at 245°C; put 20 parts of long glass fiber The glass fiber (E-type non-alkali roving) is preheated and dried by 80°C hot air pipe, and the long glass fiber is coated with 3-aminopropyltrihydroxysilane as an aqueous solution on the surface of the glass fiber during the spinning process to make the long glass fiber There are hydroxyl and amino groups on the surface of the glass fiber. The long glass fiber passes through the acetone solution of MDI at a linear speed of 1m / min. The MDI and acetone are mixed at a volume ratio of ...

Embodiment 2

[0033] According to the mass fraction, 59 parts of PBT (intrinsic viscosity is 1.0dL / g), 4 parts of CBT100, 4 parts of AX8900, 2.3 parts of POE, 2 parts of sodium benzoate, 0.2 parts of antioxidant 1010, 0.2 parts of antioxidant 168, Mix 0.4 parts of PETS evenly in a mixer; put it into a twin-screw extruder, inject it into a long glass fiber impregnation head after melting, set the temperature of the extruder at 220-230°C, and set the temperature of the impregnation head at 245°C; One piece of long glass fiber (E-type non-alkali roving) is preheated and dried by 80°C hot air pipe. During the spinning process, the long glass fiber is coated with 3-aminopropyltrihydroxysilane in aqueous solution on the surface of the glass fiber. Make the surface of the long glass fiber have hydroxyl and amino groups, the long glass fiber passes through the acetone solution of TDI at a linear speed of 0.8m / min, mix TDI and acetone at a volume ratio of 1:1, and then pass the long glass fiber throu...

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Abstract

The invention relates to a continuous long glass fiber reinforced PBT composite material. The composite material is prepared from, by mass, 40-80 parts of PBT resin, 20-50 parts of long glass fiber, 1-4 parts of a flow modifier, 2-6 parts of a flexibilizer, 1-3 parts of a nucleating agent, 0.3-0.6 parts of an antioxidant, 0.3-1 part of a lubricant, 0.1-1 part of diisocyanate or polyisocyanate and 0-5 parts of POE. The long glass fiber reinforced PBT composite material prepared in the invention has the advantages of excellent mechanical performances and good temperature tolerance, and the corresponding preparation method has the advantages of simplicity, no obvious increase of the production cost, and substantial economic benefit, and is worth to be popularized and applied.

Description

technical field [0001] The invention relates to glass fiber modified reinforced plastics, in particular to a PBT composite material modified and reinforced by continuous long glass fiber and a preparation method thereof. Background technique [0002] Long glass fiber reinforced thermoplastics (LGFRT) are a type of high-performance composite materials that have been developed rapidly in recent years. Its most prominent advantages are high stiffness and strength, excellent heat resistance, creep resistance, and dimensional stability. long life. There are significant differences between long glass fiber reinforced plastic particles and short glass fiber reinforced plastic particles. In short glass fiber reinforced plastics, due to the damage caused by the shearing action of the screw, the length of glass fibers is generally retained to about 0.2-1mm, while in long glass fiber reinforced plastics, the length of glass fibers can be retained to 3-6mm, which is short glass fiber. ...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L23/08C08K13/06C08K9/06C08K7/14
Inventor 沈澄英宋功品
Owner JIANGYIN POLYTECHNIC COLLEGE
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