Preparation method of ultrathin continuous fiber reinforced thermoplastic prepreg

Abstract

The invention provides a preparation method of an ultrathin continuous fiber reinforced thermoplastic prepreg. The preparation method comprises the following steps of processing a metal mold with micro-taper hole array characteristics, duplicating a splitting plate with micro-taper bulge array characteristics, conducting primary splitting on ultrathin fiber cloth, conducting vibrating and powder scattering on matrix resin powder, conducting secondary splitting, conducting primary overturning for homogenizing the powder, conducting secondary overturning for replacing a mold, conducting vacuum heating and melting and carrying out hot-press molding. Array taper holes are machined in the surface of the metal mold, a high-performance thermoplastic PEEK resin thin plate is used for duplicating the splitting plate with the micro-taper bulge array characteristics, full splitting of the ultrathin continuous reinforced fiber cloth is achieved, and the splitting effect is good; and in cooperationwith two times of high-frequency low-amplitude vibration powder spreading of a flow-controllable three-dimensional movable discharge spout and the splitting plate, uniform distribution of the matrixresin powder in the reinforced fiber cloth is achieved, and the problem that it is difficult to make a molten resin matrix go deep into continuous fiber bundles is effectively solved.

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...

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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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