A preparation method of ultra-thin continuous fiber reinforced thermoplastic prepreg

A technology for strengthening thermoplastic and continuous fibers, applied in the direction of coating, etc., can solve the problem that the molten resin matrix is ​​difficult to penetrate into the continuous fiber bundle, and achieve the effect of good fiber opening effect.

Active Publication Date: 2022-03-22
JIANGSU UNIV
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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the present invention provides a preparation method of ultra-thin continuous fiber reinforced thermoplastic prepreg, which effectively solves the problem that the molten resin matrix is ​​difficult to penetrate into the continuous fiber bundle

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  • A preparation method of ultra-thin continuous fiber reinforced thermoplastic prepreg

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0022] like figure 1 Shown, a kind of preparation method of ultra-thin continuous fiber reinforced thermoplastic prepreg of the present invention specifically comprises the following steps:

[0023] Step (1), using laser drilling, by controlling the laser frequency 20KHz, laser power 16W, spot diameter Parameters such as the number of impacts 20 times, on the surface of 1050-H14 aluminum sheet 1 with a length and width of 100mm×100mm and a thickness of 1mm, an array of tapered holes with 30 rows×30 columns, a diameter of 0.8mm, and a depth of 1mm is processed. A metal mold 2 with a micro-taper hole array feature is taken, wherein the diameter, number of rows, and number of columns of the array of tapered holes are determined by the degree of fiber opening, and the depth...

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Abstract

The invention provides a method for preparing an ultra-thin continuous fiber reinforced thermoplastic prepreg, which includes processing a metal mold with a micro-cone hole array feature, remanufacturing a fiber-spread board with a micro-cone protrusion array feature, and initial opening of an ultra-thin fiber cloth. Vibration dusting of fiber and matrix resin powder, second fiber opening, first turning to even powder, second turning to mold conversion, vacuum heating and melting and hot pressing. An array of tapered holes is processed on the surface of the metal mold, and the high-performance thermoplastic PEEK resin sheet is used to reproduce the fiber-spreading board with the characteristics of a micro-conical protrusion array, so as to realize the full fiber-opening and fiber-opening effect of the ultra-thin continuous reinforced fiber cloth. Good; with the three-coordinate movable nozzle with controllable flow and two high-frequency and low-amplitude vibration dusting of the expanded fiberboard, the matrix resin powder can be evenly distributed inside the reinforced fiber cloth, which effectively solves the problem of the penetration of the molten resin matrix into the continuous fiber. Difficult problems within the bundle.

Description

technical field [0001] The invention relates to the field of preparation of fiber-reinforced composite materials, in particular to a preparation method of ultra-thin continuous fiber-reinforced thermoplastic resin matrix prepreg. Background technique [0002] In recent years, continuous fiber-reinforced thermoplastic resin matrix prepregs have attracted widespread attention in the fields of automobiles, ships, and rail transit due to their high specific strength, high specific stiffness, and low density. For continuous fiber-reinforced thermoplastic prepregs, especially ultra-thin prepregs, the distribution uniformity of continuous fibers in the resin matrix and the impregnation effect of the resin matrix on the continuous fibers will directly affect the quality of the composite component. Stability of mechanical properties and service safety. [0003] On the one hand, in the whole process of continuous fiber reinforced thermoplastic prepreg preparation, the process link di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B15/10B29C41/16
CPCB29B15/105B29C41/16
Inventor 郭玉琴陆铭段梦思陈龙李富柱徐凡吴雪莲许桢英
Owner JIANGSU UNIV
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