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Preparation process of continuous fiber reinforced thermoplastic prepreg tape

A technology of reinforced thermoplastic and continuous fiber, applied in the direction of coating, etc., can solve the problems of poor controllability of resin content and limitation of application range, etc., and achieve the effect of reducing resin enrichment area, controlling resin content and simplifying process steps

Active Publication Date: 2016-12-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to dissolve the thermoplastic resin in a specific good solvent, the scope of application is limited, and the volatilization of the solvent during the hot pressing process results in a large number of voids in the prepreg tape, and the ultrafine fibers prepared by electrospinning are distributed randomly. poor controllability

Method used

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  • Preparation process of continuous fiber reinforced thermoplastic prepreg tape
  • Preparation process of continuous fiber reinforced thermoplastic prepreg tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of preparation technology of continuous fiber reinforced thermoplastic prepreg tape of the present invention comprises the following steps:

[0034] 1) Pretreatment of carbon fiber:

[0035] The unidirectional continuous carbon fiber is subjected to air flow opening treatment. After the fiber opening treatment, the continuous fiber ribbon width of the carbon fiber is expanded to 5 times of the original, and then transported to a preheating oven at a temperature of 100°C for a preheating time of 2 minutes.

[0036] 2) Preparation of semi-molten filaments by melt spinning method:

[0037]The dried polypropylene pellets are melted in the barrel of the screw extruder and then extruded into the spinning assembly, and then extruded through the metering pump, filter screen and spinneret in sequence, wherein the feeding of the barrel of the screw extruder The temperature of the feed section is 150°C, the temperature of the middle section is 180°C, the temperature of the...

Embodiment 2

[0042] A kind of preparation technology of continuous fiber reinforced thermoplastic prepreg tape of the present invention comprises the following steps:

[0043] 1) Pretreatment of glass fiber:

[0044] The unidirectional continuous glass fiber is subjected to ultrasonic fiber opening treatment. After the fiber opening treatment, the continuous fiber width of the glass fiber is expanded to 4 times of the original, and then transported to a preheating oven with a temperature of 200 ° C for 10 minutes.

[0045] 2) Preparation of semi-molten filaments by melt spinning method:

[0046] The dried polyamide resin nylon 6 slices are melted in the barrel of the screw extruder and then extruded into the spinning assembly, and then extruded through the metering pump, filter screen and spinneret in sequence, wherein the barrel of the screw extruder The temperature of the feed section is 180°C, the temperature of the middle section is 200°C, the temperature of the discharge section is 2...

Embodiment 3

[0051] A kind of preparation technology of continuous fiber reinforced thermoplastic prepreg tape of the present invention comprises the following steps:

[0052] 1) Pretreatment of boron fibers:

[0053] The unidirectional continuous boron fiber is subjected to mechanical rolling fiber opening treatment. After the fiber opening treatment, the continuous fiber strip width of the boron fiber is expanded to twice the original, and then transported to a preheating oven with a temperature of 120 ° C. The preheating time is 4 minutes .

[0054] 2) Preparation of semi-molten filaments by melt spinning method:

[0055] The dried nylon 12 chips are melted in the barrel of the screw extruder and then extruded into the spinning assembly, and then extruded through the metering pump, filter screen and spinneret in sequence, wherein the feed of the barrel of the screw extruder The temperature of the section is 180°C, the temperature of the middle section is 200°C, the temperature of the ...

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Abstract

The invention relates to a preparation process of continuous fiber reinforced thermoplastic prepreg tape. The preparation process includes: subjecting unidirectional continuous reinforced fibers to fiber splitting processing, and then performing preheating; adopting the melt spinning method to extrude thermoplastic resin into half-melting filaments, and vertically dropping the filaments to the surfaces of preprocessed reinforced fibers; enabling the filaments to array among the reinforced fibers parallelly and evenly through the action of an adhesive roll, enabling the reinforced fibers to be fully infiltrated in thermoplastic resin by means of hot-pressing infiltration, and performing cold-pressing shaping and winding to obtain the continuous fiber reinforced thermoplastic prepreg tape. The prepared prepreg tape is 60-90% in volume content of the reinforced fibers, 10-40% in volume content of the thermoplastic resin, 0.01-0.05mm in thickness, 20-1000mm in width and less than 0.08% in porosity. Production steps of prepreg tape preparation are simplified, infiltration effect of high-viscosity resin is improved, the diameter of the filaments is changed by regulating the takeup speed, resin content of the prepreg tape is controlled effectively, and the continuous fiber reinforced thermoplastic prepreg tape which is uniform in fiber distribution and complete in infiltration is finally obtained.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a preparation process of a continuous fiber reinforced thermoplastic prepreg tape. Background technique [0002] Continuous fiber-reinforced thermoplastic prepreg tape is an intermediate used to prepare continuous fiber-reinforced thermoplastic composite materials. It is widely used in automotive, aerospace, construction and other industries due to its excellent mechanical properties. The quality of prepreg directly affects the performance of composite products. The preparation techniques of continuous fiber reinforced thermoplastic prepreg mainly include melt impregnation method, solution impregnation method and fiber blending method. Among them, the melt impregnation method needs to pass the reinforcing fiber directly through the high-viscosity resin melt, which consumes a lot of energy and has poor impregnation effect, while the solution impregnation method mainly h...

Claims

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Application Information

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IPC IPC(8): B29B15/14B29B15/12
CPCB29B15/125B29B15/14
Inventor 王彪张坚胡郁菲张雪娜忻伟陈彦坤陆茜郑迎迎
Owner DONGHUA UNIV