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A kind of preparation method of butylene glycol terephthalate resin-based prepreg

A technology of butylene terephthalate and butanediol phthalate, which is applied in the field of preparation of butylene terephthalate resin-based prepregs and can solve problems such as powder shedding

Active Publication Date: 2017-04-12
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepregs prepared by the latter two have defects such as powder falling off during transportation and handling.

Method used

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  • A kind of preparation method of butylene glycol terephthalate resin-based prepreg
  • A kind of preparation method of butylene glycol terephthalate resin-based prepreg

Examples

Experimental program
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Embodiment Construction

[0018] The present invention will be described in more detail below with examples in conjunction with the accompanying drawings.

[0019] combine figure 1 , the CBT resin is heated in the resin matrix impregnation tank 2, and the heating temperature is 190 ° C until the resin is completely melted; the fiber bundles on the fiber bundle frame are soaked with the CBT resin to make a fiber cloth with a higher temperature (that is, with the melted The temperature of the CBT resin is close to the fiber cloth); when the temperature of the CBT resin attached to the fiber cloth drops to about 70°C, the catalyst injection pump 3 is used to inject the catalyst into the CBT resin attached to the fiber cloth, and the motor drives the injection pump to rotate , into the next working cycle; the catalyst injected into the CBT resin is compacted and sealed by the squeeze roller 4; the resulting CBT / fiber / catalyst prepreg is applied with a separator through the pressure roller 6 and the separat...

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PUM

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Abstract

The invention provides a method for preparing butylene terephthalate resin based prepreg. The method comprises the steps: heating CBT (Cyclic Butylene Terephthalate) resin in a resin matrix impregnating tank until the resin is completely melted; infiltrating fiber bundles in the melted CBT resin, so as to obtain fiber cloth with temperature which is close to that of the melted CBT resin; when the temperature of the CBT resin adhered to the fiber cloth is cooled to 65-75 DEG C, injecting a catalyst into the CBT resin adhered to the fiber cloth with a catalyst injection pump; carrying out squeezing seal on the catalyst injected to the CBT resin through squeezing by a squeeze roller; and applying an isolation membrane to catalyst-buried CBT / fiber prepreg, and coiling at the temperature of 60-65 DEG C, thereby obtaining a product. The method is applied to the preparation of CBT resin based composite materials with high fiber volume content; and the problems of the existing preparation methods that CBT and the catalyst are subjected to secondary reaction and the catalyst easily falls off during transporting and carrying are solved.

Description

technical field [0001] The invention relates to a method for making a prepreg using circular butylene terephthalate (CBT) as a matrix. Background technique [0002] Traditional thermoplastic composite materials are difficult to prepare composite materials with high fiber volume content, but cyclic butylene terephthalate (CBT) resin provides the possibility to make composite materials with high fiber volume content. Cyclic butylene terephthalate (CBT) has a low processing viscosity, which makes it easy to wet the reinforcement material and facilitate molding in more ways. At present, there are several methods for making fiber-reinforced prepregs based on CBT resin: Sprinkle CBT and catalyst powder evenly on the fibers and heat them to 160-180°C by infrared rays. Dipping material. In addition, there are two preparation methods of powder prepreg and preparation of prepreg by powder deposition. These several prepreg preparation methods, the former in the preparation process, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/24C08L67/02
Inventor 周利民杨斌章继峰张璐
Owner HARBIN ENG UNIV