阅读说明：本技术 碳纤维预浸料及其制备方法 (Carbon fiber prepreg and preparation method thereof ) 是由 税春晖 于 2020-07-09 设计创作，主要内容包括：本发明公开碳纤维预浸料及其制备方法,其中,一种碳纤维预浸料的制备方法,包括以下步骤：提供两单向预浸料；所述单向预浸料包括层叠设置的第一离型层和碳纤维层；按照第一方向将一所述单向预浸料制成第一方向料,去除第一方向料的第一离型层,将第一方向料的碳纤维层转移至第一基层；按照第二方向将另一所述单向预浸料制成第二方向料,去除第二方向料的第一离型层,将第二方向料的碳纤维层转移至第二基层；将第一方向料中碳纤维层背离第一基层的表面贴合于第二方向料中碳纤维层背离第二基层的表面,得到碳纤维预浸料。即本发明的技术方案能够实现碳纤维预浸料在多个方向上的取向。(The invention discloses a carbon fiber prepreg and a preparation method thereof, wherein the preparation method of the carbon fiber prepreg comprises the following steps: providing two unidirectional prepregs; the unidirectional prepreg comprises a first release layer and a carbon fiber layer which are stacked; manufacturing the unidirectional prepreg into a first-direction material according to a first direction, removing a first release layer of the first-direction material, and transferring a carbon fiber layer of the first-direction material to a first base layer; preparing the other unidirectional prepreg into a material in a second direction according to the second direction, removing the first release layer of the material in the second direction, and transferring the carbon fiber layer of the material in the second direction to a second base layer; and (3) fitting the surface of the carbon fiber layer in the first direction material, which deviates from the first base layer, to the surface of the carbon fiber layer in the second direction material, which deviates from the second base layer, so as to obtain the carbon fiber prepreg. Namely, the technical scheme of the invention can realize the orientation of the carbon fiber prepreg in a plurality of directions.)

1. A preparation method of a carbon fiber prepreg is characterized by comprising the following steps:

providing two unidirectional prepregs; the unidirectional prepreg comprises a first release layer and a carbon fiber layer which are stacked;

manufacturing the unidirectional prepreg into a first-direction material according to a first direction, removing a first release layer of the first-direction material, and transferring a carbon fiber layer of the first-direction material to a first base layer;

preparing the other unidirectional prepreg into a material in a second direction according to the second direction, removing the first release layer of the material in the second direction, and transferring the carbon fiber layer of the material in the second direction to a second base layer;

and (3) fitting the surface of the carbon fiber layer in the first direction material, which deviates from the first base layer, to the surface of the carbon fiber layer in the second direction material, which deviates from the second base layer, so as to obtain the carbon fiber prepreg.

2. The method for preparing the carbon fiber prepreg according to claim 1, wherein the unidirectional prepreg further comprises a second release layer, the second release layer is arranged on the surface of the carbon fiber layer, which faces away from the first release layer, and the step of transferring the carbon fiber layer of the first direction material to the first base layer comprises the following steps:

and (3) attaching the first base layer to the surface of the carbon fiber layer of the first direction material, which deviates from the second release layer, and removing the second release layer arranged on the first direction material.

3. The method for preparing the carbon fiber prepreg according to claim 2, wherein the step of attaching the first base layer to the surface of the carbon fiber layer of the first direction material facing away from the second release layer comprises:

and carrying out heating treatment and pressurization treatment on the surface of the carbon fiber layer of the first direction material, which is deviated from the second release layer, so that the first base layer is attached to the surface of the carbon fiber layer of the first direction material, which is deviated from the second release layer.

4. The method of manufacturing a carbon fiber prepreg according to claim 2, wherein the step of transferring the carbon fiber layer of the second direction material to the second base layer comprises:

and the second base layer is attached to the surface of the carbon fiber layer of the material in the second direction, which deviates from the second release layer, and the second release layer of the material in the second direction is removed.

5. The method for preparing the carbon fiber prepreg according to claim 4, wherein the step of adhering the second base layer to the surface of the carbon fiber layer of the second direction material facing away from the second release layer comprises:

and carrying out heating treatment and pressurization treatment on the surface of the carbon fiber layer of the second direction material, which deviates from the second release layer, so that the second base layer is attached to the surface of the carbon fiber layer of the second direction material, which deviates from the second release layer.

6. The method of making a carbon fiber prepreg according to claim 1, wherein the step of forming a unidirectional prepreg into a first direction charge according to a first direction comprises:

the method comprises the steps of arranging a plurality of shearing lines on one unidirectional prepreg according to a first direction, enabling the plurality of shearing lines to be arranged side by side along the length direction of the unidirectional prepreg, shearing the unidirectional prepreg according to the plurality of shearing lines to obtain a plurality of first direction material units, and splicing the plurality of first direction material units along the extending direction of the shearing lines to obtain the first direction material.

7. The method of producing a carbon fiber prepreg according to claim 1, wherein the step of "making another unidirectional prepreg into a second directional filler in a second direction" includes:

and arranging a plurality of shearing lines on the other unidirectional prepreg according to a second direction, arranging the plurality of shearing lines side by side along the length direction of the unidirectional prepreg, shearing the unidirectional prepreg according to the plurality of shearing lines to obtain a plurality of second direction material units, and splicing the plurality of second direction material units along the extending direction of the shearing lines to obtain the second direction material.

8. The method for preparing a carbon fiber prepreg according to claim 1, wherein the step of bonding the surface of the carbon fiber layer in the first direction material, which faces away from the first base layer, to the surface of the carbon fiber layer in the second direction material, which faces away from the second base layer, comprises:

and controlling the temperature and the counter pressure of the two pairs of press rollers, and introducing the first direction material and the second direction material between the two pairs of press rollers so that the surface of the carbon fiber layer in the first direction material, which deviates from the first base layer, is attached to the surface of the carbon fiber layer in the second direction material, which deviates from the second base layer.

9. The method of manufacturing a carbon fiber prepreg according to claim 8, wherein in the step of controlling the temperature and the nip pressure of the two pairs of nip rollers, the temperature of the two pairs of nip rollers is 50 to 60 ℃, and/or the nip pressure of the two pairs of nip rollers is 4kgf/cm²～6kgf/cm²。

10. A carbon fiber prepreg produced by the method for producing a carbon fiber prepreg according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of carbon fiber prepreg processing, in particular to a carbon fiber prepreg and a preparation method thereof.

Background

The carbon fiber prepreg is mainly prepared by impregnating carbon fibers in epoxy resin to form a carbon fiber layer, and then depositing the formed carbon fiber layer on a release layer, and is commonly used as a reinforcing material of a composite product. At present, a universal carbon fiber prepreg is a unidirectional prepreg, which refers to a carbon fiber prepreg in which carbon fibers are oriented and distributed in one direction, that is, a prepreg in the 0-degree direction. Because the final carbon fiber composite material product usually needs the carbon fiber prepreg to reach the mechanical strength in a plurality of directions, the unidirectional prepreg can not meet the requirements. Therefore, achieving multi-directional orientation of carbon fiber prepregs is a challenge to be solved.

Disclosure of Invention

The invention mainly aims to provide a preparation method of a carbon fiber prepreg, aiming at realizing the orientation of the carbon fiber prepreg in multiple directions.

In order to achieve the purpose, the invention provides a preparation method of a carbon fiber prepreg, which comprises the following steps:

providing two unidirectional prepregs; the unidirectional prepreg comprises a first release layer and a carbon fiber layer which are stacked;

manufacturing the unidirectional prepreg into a first-direction material according to a first direction, removing a first release layer of the first-direction material, and transferring a carbon fiber layer of the first-direction material to a first base layer;

preparing the other unidirectional prepreg into a material in a second direction according to the second direction, removing the first release layer of the material in the second direction, and transferring the carbon fiber layer of the material in the second direction to a second base layer;

and (3) fitting the surface of the carbon fiber layer in the first direction material, which deviates from the first base layer, to the surface of the carbon fiber layer in the second direction material, which deviates from the second base layer, so as to obtain the carbon fiber prepreg.

Optionally, the unidirectional prepreg further includes a second release layer, the second release layer is disposed on a surface of the carbon fiber layer away from the first release layer, and the step of "transferring the carbon fiber layer of the first directional material to the first base layer" includes:

and (3) attaching the first base layer to the surface of the carbon fiber layer of the first direction material, which deviates from the second release layer, and removing the second release layer arranged on the first direction material.

Optionally, the step of "attaching the first base layer to the surface of the carbon fiber layer of the first direction material facing away from the second release layer" includes:

and carrying out heating treatment and pressurization treatment on the surface of the carbon fiber layer of the first direction material, which is deviated from the second release layer, so that the first base layer is attached to the surface of the carbon fiber layer of the first direction material, which is deviated from the second release layer.

Optionally, the step of "transferring the carbon fiber layer of the second oriented strand to the second base layer" comprises:

and the second base layer is attached to the surface of the carbon fiber layer of the material in the second direction, which deviates from the second release layer, and the second release layer of the material in the second direction is removed.

Optionally, the step of "attaching the second base layer to the surface of the carbon fiber layer facing away from the second release layer of the second direction material" includes:

and carrying out heating treatment and pressurization treatment on the surface of the carbon fiber layer of the second direction material, which deviates from the second release layer, so that the second base layer is attached to the surface of the carbon fiber layer of the second direction material, which deviates from the second release layer.

Optionally, the step of "making a unidirectional prepreg into a first direction material according to a first direction" includes:

the method comprises the steps of arranging a plurality of shearing lines on one unidirectional prepreg according to a first direction, enabling the plurality of shearing lines to be arranged side by side along the length direction of the unidirectional prepreg, shearing the unidirectional prepreg according to the plurality of shearing lines to obtain a plurality of first direction material units, and splicing the plurality of first direction material units along the extending direction of the shearing lines to obtain the first direction material.

Optionally, the step of "making another unidirectional prepreg into a second directional material in a second direction" includes:

and arranging a plurality of shearing lines on the other unidirectional prepreg according to a second direction, arranging the plurality of shearing lines side by side along the length direction of the unidirectional prepreg, shearing the unidirectional prepreg according to the plurality of shearing lines to obtain a plurality of second direction material units, and splicing the plurality of second direction material units along the extending direction of the shearing lines to obtain the second direction material.

Optionally, the step of "attaching the surface of the carbon fiber layer in the first direction material, which faces away from the first base layer, to the surface of the carbon fiber layer in the second direction material, which faces away from the second base layer" includes:

and controlling the temperature and the counter pressure of the two pairs of press rollers, and introducing the first direction material and the second direction material between the two pairs of press rollers so that the surface of the carbon fiber layer in the first direction material, which deviates from the first base layer, is attached to the surface of the carbon fiber layer in the second direction material, which deviates from the second base layer.

Optionally, in the step of controlling the temperature and the compression pressure of the two pairs of compression rollers, the temperature of the two pairs of compression rollers is 50-60 ℃, and/or the compression pressure of the two pairs of compression rollers is 4kgf/cm²～6kgf/cm²。

The invention also provides a carbon fiber prepreg, which is prepared by the preparation method of the carbon fiber prepreg, and the preparation method of the carbon fiber prepreg comprises the following steps: providing two unidirectional prepregs; the unidirectional prepreg comprises a first release layer and a carbon fiber layer which are stacked; manufacturing the unidirectional prepreg into a first-direction material according to a first direction, removing a first release layer of the first-direction material, and transferring a carbon fiber layer of the first-direction material to a first base layer; preparing the other unidirectional prepreg into a material in a second direction according to the second direction, removing the first release layer of the material in the second direction, and transferring the carbon fiber layer of the material in the second direction to a second base layer; and (3) fitting the surface of the carbon fiber layer in the first direction material, which deviates from the first base layer, to the surface of the carbon fiber layer in the second direction material, which deviates from the second base layer, so as to obtain the carbon fiber prepreg.

According to the technical scheme, a unidirectional prepreg is made into a first direction material according to a first direction, a first release layer of the first direction material is removed, and a carbon fiber layer of the first direction material is transferred to a first base layer; preparing the other unidirectional prepreg into a material in a second direction according to the second direction, removing the first release layer of the material in the second direction, and transferring the carbon fiber layer of the material in the second direction to a second base layer; and then attaching the surface of the carbon fiber layer in the first direction material, which is deviated from the first base layer, to the surface of the carbon fiber layer in the second direction material, which is deviated from the second base layer, so that the carbon fiber layers oriented in two directions are clamped between the first base layer and the second base layer, and the carbon fiber prepreg of the carbon fiber layers oriented in two directions is obtained, namely, the technical scheme of the invention can realize the orientation of the carbon fiber prepreg in multiple directions.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a flow chart of an embodiment of a method of making a carbon fiber prepreg according to the present invention;

FIG. 2 is a detailed flowchart of step S23 in FIG. 1 according to the present invention;

FIG. 3 is a detailed flowchart of step S33 in FIG. 1 according to the present invention;

FIG. 4 is a detailed flowchart of step S21 in FIG. 1 according to the present invention;

FIG. 5 is a detailed flowchart of step S31 in FIG. 1 according to the present invention;

FIG. 6 is a detailed flowchart of step S40 in FIG. 1 according to the present invention;

FIG. 7 is a process flow diagram of a +45 ° first direction charge in example 1 of the present invention;

FIG. 8 is a process flow diagram of a +45 ℃ semifinished product according to example 1 of the present invention;

FIG. 9 is a process flow diagram of a-45 ° second web in example 1 of the present invention;

FIG. 10 is a process flow diagram of a-45 ℃ semi-finished product in example 1 of the present invention;

FIG. 11 is a process flow diagram of a + -45 deg. carbon fiber prepreg in example 1 of the present invention;

fig. 12 is a schematic structural view of a carbon fiber layer in a carbon fiber prepreg of ± 45 ° in example 1 of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	The first release layer	200	Carbon fiber layer
300	The second release layer

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

The invention provides a preparation method of a carbon fiber prepreg, aiming at realizing the orientation of the carbon fiber prepreg in multiple directions.

Referring to fig. 1, in an embodiment of the present invention, a method for preparing a carbon fiber prepreg includes the following steps:

step S10, providing two unidirectional prepregs; the unidirectional prepreg comprises a first release layer and a carbon fiber layer which are stacked;

step S20, manufacturing the unidirectional prepreg into a first directional material according to a first direction; removing the first release layer of the first direction material; transferring the carbon fiber layer of the first direction material to a first base layer;

step S30, manufacturing another unidirectional prepreg into a second direction material according to a second direction; removing the first release layer of the second direction material; transferring the carbon fiber layer of the second direction material to a second base layer;

and step S40, attaching the surface of the carbon fiber layer in the first direction material, which is deviated from the first base layer, to the surface of the carbon fiber layer in the second direction material, which is deviated from the second base layer, so as to obtain the carbon fiber prepreg.

According to the technical scheme, a unidirectional prepreg is made into a first direction material according to a first direction, a first release layer of the first direction material is removed, and a carbon fiber layer of the first direction material is transferred to a first base layer; preparing the other unidirectional prepreg into a material in a second direction according to the second direction, removing the first release layer of the material in the second direction, and transferring the carbon fiber layer of the material in the second direction to a second base layer; and then attaching the surface of the carbon fiber layer in the first direction material, which is deviated from the first base layer, to the surface of the carbon fiber layer in the second direction material, which is deviated from the second base layer, so that the carbon fiber layers oriented in two directions are clamped between the first base layer and the second base layer, and the carbon fiber prepreg of the carbon fiber layers oriented in two directions is obtained, namely, the technical scheme of the invention can realize the orientation of the carbon fiber prepreg in multiple directions. It should be noted that, the first release layer can be a polyethylene layer or a release structure layer prepared from other plastics, and the carbon fiber layer is prepared by impregnating carbon fibers in epoxy resin, so that the formed carbon fiber layer is bonded to the first release layer through the impregnated epoxy resin, and certainly, in order to facilitate the practical application of the unidirectional prepreg, the surface of the first release layer departing from the first release layer is provided with a second release layer, so that the unidirectional prepreg can be attached to the surface of the carbon fiber preform by removing the second release layer on the surface in the practical application of the unidirectional prepreg, thereby playing a role in enhancing the unidirectional prepreg.

Referring to fig. 2, in an embodiment of the present invention, the unidirectional prepreg further includes a second release layer, the second release layer is disposed on a surface of the carbon fiber layer away from the first release layer, and the step S23 of "transferring the carbon fiber layer of the first directional material to the first base layer" includes: step S231, adhering the first base layer to the surface of the carbon fiber layer of the first direction material, which is away from the second release layer; step S232, removing the second release layer disposed on the first direction material. It should be noted that the release force (i.e., the peeling force) of the first base layer to the carbon fiber layer is greater than the release force of the second base layer to the carbon fiber layer, that is, the first base layer has better adhesion force to the carbon fiber layer, so the first base layer is tightly combined with the carbon fiber layer, after the second base layer is removed, the carbon fiber layer is transferred to the continuous first base layer with high release force, and thus, the polyethylene layer is arranged on the surface of the carbon fiber layer deviating from the first base layer, so that the preparation of the first semi-finished product material is realized, and the subsequent processing is facilitated.

In an embodiment of the invention, the step of "attaching the first base layer to the surface of the carbon fiber layer of the first direction material, which faces away from the second release layer" includes: and carrying out heating treatment and pressurization treatment on the surface of the carbon fiber layer of the first direction material, which is deviated from the second release layer, so that the first base layer is attached to the surface of the carbon fiber layer of the first direction material, which is deviated from the second release layer. Certainly, in order to ensure that the first base layer is tightly attached to the surface of the carbon fiber layer of the first direction material away from the second release layer, the embodiment of the invention performs heating treatment and pressurizing treatment on the surface of the carbon fiber layer of the first direction material away from the second release layer, so that the epoxy resin on the surface of the carbon fiber layer is fully melted and conveniently permeates into the first base layer, the carbon fiber layer is tightly attached to the first base layer, and the bonding tightness between the carbon fiber layer and the first base layer is ensured. Of course, the temperature of the heat treatment and the pressure of the pressure treatment may be set according to actual conditions, so as to ensure that the carbon fiber layer is tightly combined with the first base layer.

Referring to fig. 3, in an embodiment of the present invention, the step S33 of "transferring the carbon fiber layer of the second oriented material to the second base layer" includes: step S331, attaching a second base layer to the surface of the carbon fiber layer of the second direction material, which is away from the second release layer; step S332, removing the second release layer disposed on the second direction material. It should be noted that the release force (i.e., the peeling force) of the second base layer to the carbon fiber layer is greater than the release force of the second base layer to the carbon fiber layer, that is, the second base layer has better adhesion force to the carbon fiber layer, so the second base layer is tightly combined with the carbon fiber layer, after the second release layer is removed, the carbon fiber layer is transferred to the continuous second base layer with high release force, and thus, the polyethylene layer is arranged on the surface of the carbon fiber layer deviating from the second base layer, so that the preparation of the second semi-finished product is realized, and the subsequent processing is facilitated.

In an embodiment of the invention, the step of "attaching the second base layer to the surface of the carbon fiber layer facing away from the second release layer of the second direction material" includes: and carrying out heating treatment and pressurization treatment on the surface of the carbon fiber layer of the second direction material, which deviates from the second release layer, so that the second base layer is attached to the surface of the carbon fiber layer of the second direction material, which deviates from the second release layer. According to the embodiment of the invention, the surface of the carbon fiber layer of the second direction material, which is far away from the second release layer, is subjected to heating treatment and pressurization treatment, so that the epoxy resin on the surface of the carbon fiber layer is fully melted and is convenient to permeate into the second base layer, the carbon fiber layer is tightly attached to the second base layer, and the bonding tightness of the carbon fiber layer and the second base layer is ensured. Of course, the temperature of the heat treatment and the pressure of the pressure treatment may be set according to actual conditions, so as to ensure that the carbon fiber layer is tightly combined with the second base layer.

Referring to fig. 4, in an embodiment of the present invention, the step of "forming a unidirectional prepreg into a first direction material according to a first direction" includes: step S211, arranging a plurality of shearing lines on one unidirectional prepreg according to a first direction, and arranging the plurality of shearing lines side by side along the length direction of the unidirectional prepreg; step S212, cutting the unidirectional prepreg according to the plurality of cutting lines to obtain a plurality of first direction material units; step S213, splicing the plurality of first direction material units along the extension direction of the shear line to obtain the first direction material. For example, a + 45-degree first direction material is prepared, a shearing line with the inclination of +45 degrees is arranged along the width direction, and the shearing line is arranged at intervals along the length direction of the unidirectional prepreg, so that the unidirectional prepreg is sheared according to the shearing line to form a parallelogram-shaped first direction material unit with the included angle of +45 degrees, and the first direction material unit is spliced along the direction of the shearing line, so that the + 45-degree first direction material is obtained. The + 45-degree first direction material is formed by splicing sheared unidirectional prepreg, so that the first release layer and the carbon fiber layer of the + 45-degree first direction material are discontinuous, in order to obtain a continuous and complete + 45-degree first direction material, the discontinuous first release layer is removed, the carbon fiber layer is transferred to the continuous first base layer, and in this way, the discontinuous carbon fiber layer is spliced through the continuous first base layer, so that the continuous and complete + 45-degree first direction material is obtained. Certainly, in order to further obtain a complete +45 ° first direction material, in the embodiment of the present invention, the second release layer of the carbon fiber layer away from the first base layer may be removed, and a continuous polyethylene layer is used for bonding, so that the +45 ° first direction material, that is, the first semi-finished product material, is realized.

Referring to fig. 5, in an embodiment of the present invention, the step of "forming another unidirectional prepreg into a second directional material according to a second direction" includes: step S311, arranging a plurality of shearing lines on the other unidirectional prepreg according to a second direction, and arranging the plurality of shearing lines side by side along the length direction of the unidirectional prepreg; step S312, cutting the unidirectional prepreg according to the plurality of cutting lines to obtain a plurality of second direction material units; and S313, splicing the plurality of second direction material units along the extension direction of the shear line to obtain the second direction material. For example, a-45-degree second direction material is prepared, a shearing line with the inclination of-45 degrees is arranged in the width direction, the shearing lines are arranged at intervals in the length direction of the unidirectional prepreg, so that the unidirectional prepreg is sheared according to the shearing line to form a parallelogram-shaped second direction material unit with the included angle of-45 degrees, and the second direction material units are spliced in the direction of the shearing line to obtain the-45-degree second direction material. It should be noted that the-45 ° second direction material is formed by splicing the cut unidirectional prepreg, so that the first release layer and the carbon fiber layer of the-45 ° second direction material are discontinuous, and in order to obtain a continuous and complete-45 ° second direction material, in the embodiment of the present invention, the discontinuous first release layer is removed, and the carbon fiber layer is transferred to the continuous second base layer, so that the discontinuous carbon fiber layer is spliced through the continuous second base layer, and thus the continuous and complete-45 ° second direction material is obtained. Certainly, in order to further obtain a complete-45-degree second direction material, the embodiment of the invention can remove the second release layer of the carbon fiber layer away from the second base layer, and adopts continuous polyethylene layer lamination, so that the-45-degree second direction material is realized, namely the second semi-finished product material.

Referring to fig. 6, in an embodiment of the present invention, the step of "attaching the surface of the carbon fiber layer in the first direction facing away from the first base layer to the surface of the carbon fiber layer in the second direction facing away from the second base layer" includes: step S41, controlling the temperature and the pressure of the two pairs of press rolls; and step S42, introducing the first direction material and the second direction material between two pairs of press rollers, so that the surface of the carbon fiber layer in the first direction material, which is deviated from the first base layer, is jointed with the surface of the carbon fiber layer in the second direction material, which is deviated from the second base layer. The method comprises the steps of removing polyethylene films on the surfaces of a first semi-finished product material and a second semi-finished product material to obtain a first direction material and a first direction material, oppositely arranging the surface of a carbon fiber layer of the first direction material, which is far away from a first base layer, and the surface of the carbon fiber layer of the first direction material, which is far away from a second base layer, and sending the carbon fiber layer and the carbon fiber layer into a space between two pairs of compression rollers, closely attaching the first direction material and the first direction material by controlling the temperature and the compression pressure of the two pairs of compression rollers, and clamping a carbon fiber layer at a temperature of +45 degrees and a carbon fiber layer at a temperature of-45 degrees between the first base layer and the second base layer, thereby realizing the preparation of the carbon fiber prepreg at. Of course, before the first direction material and the second direction material are fed into the two pairs of press rollers, a heating plate may be further provided, and the first direction material and the second direction material are added through the heating plate, so that the first direction material and the second direction material are attached more tightly, preferably, the heating temperature of the heating plate is 55 ℃, and of course, the heating temperature of the heating plate may also be appropriately adjusted, and the embodiment of the present invention is not limited thereto, and the above is within the protection scope of the embodiment of the present invention.

In an embodiment of the present invention, in the step of controlling the temperature and the nip pressure of the two pairs of nip rolls, the temperature of the two pairs of nip rolls is 50 to 60 ℃, and/or the nip pressure of the two pairs of nip rolls is 4kgf/cm²～6kgf/cm². It should be noted that, in the embodiment of the present invention, the distance between the two pairs of press rollers may be set according to the thicknesses of the first direction material and the second direction material, and the embodiment of the present invention ensures that the first direction material and the second direction material are in close contact by setting the distance between the two pairs of press rollers. In order to further achieve the effect of close adhesion, it is preferable that the pair pressure of the two pairs of press rolls is 4kgf/cm²～6kgf/cm²The temperature of the two pairs of compression rollers is 50-60 ℃, thus ensuring the carbon fiber layer of the material in the first direction and the second directionAnd (3) tightly attaching the carbon fiber layers of the facing materials, thereby obtaining the +/-45-degree carbon fiber prepreg. Preferably, the +/-45-degree carbon fiber prepreg is cooled by cold air, and the temperature of the cold air is 15 ℃, so that the effect of cooling and shaping the +/-45-degree carbon fiber prepreg is achieved. It should be noted that, the structural composition of the ± 45 ° carbon fiber prepreg includes the first base layer, the ± 45 ° carbon fiber layer and the second base layer, and of course, in the actual process, the first base layer and the second base layer can be peeled off from the surface of the ± 45 ° carbon fiber layer, so as to facilitate the production and processing of the composite product.

The technical solution of the present invention is further described below with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.