TWI781780B - Thermoplastic carbon fiber composite structure and method of making the same - Google Patents

Abstract

The present invention discloses a thermoplastic carbon fiber composite material structure and its manufacturing method, including first making a thermoplastic fiber into the first thermoplastic non-woven fiber layer, and then using an air-laid machine to comb the carbon fiber to produce a two-dimensional or three-dimensional direction The fibers fall on the first thermoplastic non-woven fiber layer to form a carbon fiber layer, and finally the second thermoplastic non-woven fiber layer is formed on the carbon fiber layer to form a carbon fiber composite material felt with a three-layer structure. Then use a hot press forming machine to perform hot pressing to form and fix the carbon fiber composite felt for subsequent product processing and use. The invention can effectively solve the problem of incomplete impregnation of carbon fibers after hot-pressing molding of thermoplastic carbon fiber composite materials, and can effectively improve the quality of end products because the mixing of carbon fibers and non-woven fabric fibers is more uniform.

Description

Thermoplastic carbon fiber composite material structure and manufacturing method thereof

The invention relates to a thermoplastic carbon fiber composite material structure and a manufacturing method thereof, in particular to a technical field of mixing carbon fibers and thermoplastic non-woven fibers more uniformly and improving product quality.

Press, fiber sheet molding compound is composed of a fiber material and a resin material; the strength, rigidity and dimensional stability of the fiber sheet molding compound are far superior to the resin material, so it is often used in the manufacture of various molded products. Therefore, the demand for the fiber sheet molding compound is increasing year by year in various fields. Since the fiber sheet molding compound is widely used, its quality must be strictly controlled. How to reduce the manufacturing cost while maintaining the same flexural strength and flexural modulus of the fiber sheet molding compound It is a big subject.

Especially thermoplastic composites usually use glass fiber, carbon fiber or aramid fiber as reinforcement material for thermoplastic polymer matrix. Glass fibers are used in a variety of structural and mechanical parts to improve a variety of mechanical properties, including strength and stiffness, non-conductivity, and providing dimensional dimensional stability. Carbon fiber offers the best strength and stiffness properties, lower density, lower coefficient of expansion, and better creep and wear resistance than glass. Polyaramid fibers have low coefficients of friction and thermal expansion, good toughness and superior wear resistance, and these reinforcements can also provide various advantages depending on their physical form. Since the fiber-reinforced composite materials that use carbon fiber, amide fiber or glass fiber as reinforcing fibers have high specific strength and specific elastic modulus, they have been widely used in structural/non-structural parts such as aircraft or automobiles. Tennis rackets, golf clubs, fishing rods and other sporting goods industry or general purpose, etc. As the form of the reinforcing fibers used, there are woven fabrics using continuous fibers, UD sheets in which fibers are gathered in one direction, random sheets using cut fibers, and non-woven fabrics.

However, in order to prevent warping of molded products, the lamination process is quite cumbersome and complicated, resulting in high cost and lengthy process of fiber reinforced composite materials. Secondly, in the prior art, it is necessary to pre-impregnate the reinforced fiber base material with a thermosetting resin (called prepreg, prepreg), and use a vacuum forming kettle (autoclave) to heat and press for more than 2 hours to obtain a fiber-reinforced composite material. , so the process forming time is lengthy. Therefore, how to solve the complex manufacturing process, high cost and long time is an urgent problem to be solved.

In view of the problems in the aforementioned prior art, the purpose of the present invention is to provide a carbon fiber composite material structure with a three-layer structure made of thermoplastic fibers and carbon fibers with reinforcing fiber characteristics, which can be directly cut to the required size and placed in a hot In the compression molding machine, the product can be obtained after heating and pressing, which can simplify the manufacturing process, and has no storage period for raw materials, waste materials can be recycled, low production cost and good quality, etc., and can be widely used in industries and sports in various technical fields. Supplies and other products.

The secondary purpose of the present invention is to provide a material that does not need to impregnate the reinforcing fiber base material with a thermosetting resin (called prepreg, prepreg) in advance, using a vacuum forming kettle (autoclave) to heat and press for more than 2 hours. The fiber-reinforced composite material can solve the problem of lengthy forming process time.

According to the purpose of the present invention, a kind of thermoplastic carbon fiber composite material structure is proposed, comprising: a first thermoplastic non-woven fiber layer; a second thermoplastic non-woven fiber layer; , make the carbon fiber layer between the first thermoplastic non-woven fiber layer and the second thermoplastic non-woven fiber layer, and make a carbon fiber composite felt, the thermocompression molding machine includes a roller, the outer ring of the roller Multiple protrusions are provided.

According to the above technical features, wherein the first thermoplastic non-woven fiber layer and the second thermoplastic non-woven fiber layer are all selected from the same material, such as polyethylene (PE), polypropylene (PP), polystyrene (PS) , polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), nylon (Nylon), polycarbonate (PC), polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET) or polyoxymethylene (POM).

According to the above technical features, wherein the carbon fiber layer is selected from new yarns, recycled yarns, leftovers or waste yarns.

According to the above technical features, wherein the first thermoplastic non-woven fiber layer, the second thermoplastic non-woven fiber layer and the carbon fiber layer are all combed and sorted by an air-laid machine to produce two-dimensional or three-dimensional fiber orientation of the fibers formed, and the flow type is isotropic.

According to the above technical features, wherein the carbon fiber layer is thermally bonded to the first thermoplastic non-woven fiber layer and the second thermoplastic non-woven fiber layer on the opposite side by using the convex contact points of the roller .

According to the above technical features, wherein the first thermoplastic non-woven fiber layer and the second thermoplastic non-woven fiber layer are formed by a high-temperature hot press through a high-temperature hot-pressing process, and the temperature ranges from 160 degrees Celsius to 200 degrees Celsius.

According to the above technical features, wherein the hot pressing temperature range of the hot pressing molding machine is between 240°C and 280°C.

The object of the present invention proposes another kind of thermoplastic carbon fiber composite manufacturing method, comprising: providing a first thermoplastic non-woven fiber layer; forming a carbon fiber layer on the first thermoplastic non-woven fiber layer; forming a carbon fiber layer on the carbon fiber layer forming a second thermoplastic non-woven fiber layer; and simultaneously carrying out plane and multiple point contact hot pressing on the first thermoplastic non-woven fiber layer, the carbon fiber layer and the second thermoplastic non-woven fiber layer to form a Carbon fiber composite felt.

According to the above technical features, the carbon fiber layer is formed by an air-laid machine through air-combing to generate two-dimensional or three-dimensional fiber orientation of carbon fibers.

According to the above technical features, the carbon fibers in the carbon fiber layer are short fibers, and the length of the short fibers ranges from 30 mm to 120 mm.

According to the above-mentioned technical features, wherein the carbon fiber layer and the first thermoplastic non-woven fiber layer and the second thermoplastic non-woven fiber layer on the opposite side are subjected to plane and multiple point contact heat using a thermocompression molding machine. Press to form a hot-melt bond. The hot-pressing temperature range of the hot-press molding machine is between 240 degrees Celsius and 280 degrees Celsius.

According to the above technical features, wherein the first thermoplastic non-woven fiber layer and the second thermoplastic non-woven fiber layer are formed by a high-temperature hot press through a high-temperature hot-pressing process, and the temperature ranges from 160 degrees Celsius to 200 degrees Celsius.

According to the above technical features, wherein the first thermoplastic non-woven fiber layer and the second thermoplastic non-woven fiber layer are selected from polyethylene (PE), polypropylene (PP), polystyrene (PS), polymethyl Methyl acrylate (PMMA), polyvinyl chloride (PVC), nylon (Nylon), polycarbonate (PC), polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET), or polyoxymethylene ( POM).

According to the above technical features, wherein the carbon fiber layer is selected from recycled yarn, new yarn, leftovers or waste yarn.

For the benefit of the examiner to understand the technical features, content and advantages of the present invention and the effects that can be achieved, the present invention is hereby described in detail in the form of embodiments in conjunction with the accompanying drawings, and the drawings used therein, its The subject matter is only for illustration and auxiliary instructions, and not necessarily the true proportion and precise configuration of the present invention after implementation, so it should not be interpreted based on the proportion and configuration relationship of the attached drawings, and limit the scope of rights of the present invention in actual implementation. Together first describe.

Please refer to Figure 1 and Figure 2 at the same time, Figure 1 is a schematic diagram of the structure of the present invention; Figure 2 is a schematic diagram of the structural steps of the present invention. The carbon fiber composite material structure of the present invention comprises a first thermoplastic non-woven fiber layer 10, a second thermoplastic non-woven fiber layer 20 and a carbon fiber layer 30; the carbon fiber layer 30 is located between the first thermoplastic non-woven fiber layer 10 and the second A carbon fiber composite felt 100 with a three-layer structure is formed between the two thermoplastic non-woven fiber layers 20 . In the process of making thermoplastic composite materials, because the characteristics of each fiber material are different, in order to ensure that the mixing ratio of fiber materials with different characteristics is required by the process, the different fiber materials must be weighed separately before the fiber opening process , to process the felt, and then put it into the fiber opening process again to make a composite material felt.

Continuing from the previous section, the first thermoplastic non-woven fiber layer 10 and the second thermoplastic non-woven fiber layer 20 are all selected from polyethylene (PE), polypropylene (PP), polystyrene (PS), polymethacrylate Polyester (PMMA), Polyvinyl Chloride (PVC), Nylon (Nylon), Polycarbonate (PC), Polytetrafluoroethylene (PTFE), Polyethylene Terephthalate (PET), or Polyoxymethylene (POM) , the type of material can be selectively produced according to the finished product conditions, and the present invention is not limited here. In this embodiment, the use of polypropylene (PP) fibers as the first thermoplastic non-woven fiber layer 10 and the second thermoplastic non-woven fiber layer 20 is described as an example. The best use of polypropylene (PP) is short fiber, which is to open the polypropylene (PP) fiber in advance. The fiber opening process is used to comb and arrange the disordered polypropylene (PP) fiber, and then through The machine 40 is constantly stretching, twisting, and embracing (that is, pulling closer together). Then, the air-laid machine 60 is used to comb and arrange the polypropylene (PP) fibers to produce two-dimensional or three-dimensional fiber orientation, so as to obtain a uniform polypropylene (PP) fiber web with two-dimensional (2D) or three-dimensional (3D) disorderly arrangement . When the polypropylene (PP) fiber web obtained by using the air-laying machine 60 exhibits a three-dimensional distribution, the strength difference between the longitudinal direction and the transverse direction is small, and the flow type is isotropic. Finally, the first thermoplastic non-woven fiber layer 10 is formed by a high-temperature hot press (not shown in the figure) through a high-temperature hot-pressing process. At this time, the first thermoplastic non-woven fiber layer 10 can be called a thermoplastic fiber mat. ; Wherein, the temperature range is between 160 degrees Celsius and 200 degrees Celsius. In the same way, the second thermoplastic non-woven fiber layer 20 is also a polypropylene (PP) fiber web obtained by continuously stretching, twisting, and entanglement through the opening machine 40' in the same way, and then air-laid, and finally subjected to high temperature It is made by high temperature hot pressing process of hot press machine.

It is worth noting above that the temperature of the high-temperature hot-pressing process will vary due to the different thermoplastic fiber materials used, so the present invention does not limit the temperature setting range here. Furthermore, the manufacturing process of the air-laid machine 60 is roughly divided into five forms: the first type of natural falling, the fibers are freely falling into the net by centrifugal force and the weight of the fiber itself. The second press-in type, the fiber is separated from the cylinder by the centrifugal force and the blown airflow, and then conveyed and formed into a web. The third type of suction, the fiber is separated from the cylinder by centrifugal force and inhaled airflow, and then conveyed and formed into a web. The fourth kind of loop closed type, the fiber stripping, conveying and web forming are all completed by only one fan. The fifth type of combination of pressure and suction is through the combination of the press-in type and the suction type. The suction type mainly uses two types of machines: blowing and suction. Since the above-mentioned air-laid machine 60 has different production parameters due to different manufacturing processes, the production parameters will not be described here, and can be adjusted according to the manufacturing process requirements. The purpose of using the air-laid machine in the present invention is to obtain a uniform fiber web in a three-dimensional disorderly order, so no matter which type of air-laid machine is used, it is suitable for the technical application of the present invention.

Next, the application and characteristics of the carbon fiber layer 30 will be described. Carbon fiber has many advantages such as optimal strength and stiffness, lower density and lower expansion coefficient than glass, and better creep resistance and wear resistance. The carbon fiber layer 30 is selected from new yarns, recycled yarns, leftovers or waste yarns, and the type of material can be selectively produced according to the finished product conditions, and the present invention is not limited here. For example, the present invention can use new yarn, leftovers, recycled yarn or waste yarn to carry out the fiber opening process. First, the disordered and entangled carbon fibers are combed and arranged, and then stretched, twisted, and entangled continuously through the fiber opener. As shown in Figure 2, the present invention uses a conveying device 200 to place the finished first thermoplastic non-woven fiber layer 10 on the conveying device 200 for production and transportation of carbon fiber composite materials, and then through an air-laid machine 60 After combing and arranging the carbon fibers in a two-dimensional or three-dimensional fiber orientation, they are scattered on the first thermoplastic non-woven fiber layer 10, presenting a layer of carbon fiber layer 30 in a uniform flat state, and then the second thermoplastic non-woven fiber layer 20 Stacked on the carbon fiber layer 30 to form a carbon fiber composite mat 100 with a three-layer structure, wherein the carbon fibers in the carbon fiber layer 30 are short fibers, and the length of the short fibers ranges from 30 mm to 120 mm.

It is worth noting that the above-mentioned process stacks the first thermoplastic non-woven fiber layer 10, the carbon fiber layer 30 and the second thermoplastic non-woven fiber layer 20 sequentially from bottom to top, which can ensure that the non-woven fiber material can evenly cover the carbon fiber, In order to avoid insufficient strength uniformity of the finished product after the subsequent thermocompression forming process. Since the carbon fiber composite felt 100 with a three-layer structure has a loose structure and a layered state, it is called a semi-finished product here, so it must be thermocompressed through a thermocompression molding machine 50. The thermocompression molding machine 50 includes rollers 51, The outer edge ring of 51 is provided with a plurality of protrusions 52 . The carbon fiber layer 30 and the first thermoplastic non-woven fiber layer 10 and the second thermoplastic non-woven fiber layer 20 on the opposite surface form a heat-melt bond by using the contact points of these convex parts 52 of the roller 51. , and the thermoplastic fibers of the carbon fiber composite material mat 100 with a three-layer structure are stuck together under the condition of point contact to form a carbon fiber composite material mat 100 in a pseudo-fixed state, which is referred to as a finished product here. The structure of these protrusions 52 is designed to be made of hard material, the purpose is to achieve a better point contact thermal fusion bonding effect, and the distribution method, point contact area or quantity of these protrusions 52 can be adjusted according to the requirements of the finished product. And to adjust the structure design, the present invention does not limit the structure of the protrusions 52 on the roller 51 here. In this way, it is possible to avoid affecting the production yield of the back-end product due to the loose structure and layering of the finished semi-finished product during the transportation process. The hot pressing temperature range of the hot pressing forming machine 50 is between 240 degrees Celsius and 280 degrees Celsius. This temperature is suitable for polypropylene (PP) fibers, because the hot pressing temperature range of the hot pressing forming machine 50 will vary according to the first thermoplastic non-woven fabric The thermoplastic fibers selected for the fiber layer 10 and the second thermoplastic non-woven fiber layer 20 vary depending on the material, so the present invention does not limit the setting range of the hot pressing temperature of the hot pressing molding machine 50 here.

Please refer to Fig. 2 and Fig. 3 at the same time. Fig. 3 is a partially enlarged schematic diagram of the thermoforming process of the present invention. As shown in Figure 3, it is a three-layer carbon fiber composite felt 100, and the left L is the finished product (the carbon fiber composite felt 100 is a solid structural shape after the thermoforming machine 50 performs thermocompression molding, That is, the finished product), and R on the right is the semi-finished product (the carbon fiber composite felt 100 has a loose structure and is not hot-pressed).

In more detail, in order to produce a carbon fiber composite mat 100 with better performance, in this embodiment, the first thermoplastic non-woven fiber layer 10 and the second thermoplastic non-woven fiber layer 20 are made of polypropylene fibers (PP fiber), which is combined with carbon fiber into a carbon fiber composite material felt 100 with a three-layer structure, and performs the process methods of the control group and the experimental group 1 to 3, please refer to the following table (1): control group Experimental group 1 Experimental group 2 Experimental group 3 composition CF+PP fiber opening CF(80mm)+PP fiber opening CF(80mm)+PP fiber opening CF(80mm)+PP fiber opening resin system PP PP PP PP Process Fiber opening + hot pressing (hot pressing machine) Fiber opening + needling + hot pressing (hot pressing machine) Fiber opening + needling + hot pressing (hot pressing machine) Fiber opening + hot pressing 1 (high temperature hot pressing machine) + hot pressing (hot pressing molding machine) RC percentage 35 35 35 35 Remark Tablet properties (without needles) Flat plate physical properties (0 degree direction test piece) Flat plate physical properties (90 degree direction test piece) Tablet properties (without needles) mechanical properties test method unit tensile strength ASTM3039 MPa 116 Max 121 78 Max 96 24 Max 29 112 Max 120 Tensile modulus ASTM3039 Gpa 23 Max 24 32 Max 39 21 Max 21 25 Max 29 Bending strength ASTM D790 MPa 100 Max 106 88 Max 93 73 Max 85 101 Max 104 Flexural modulus ASTM D790 Gpa 12 Max13 12 Max13 8 Max10 12 Max13 It can be seen from Table (1) that both experimental group 1 and experimental group 2 are fiber mats (same batch) that have undergone the needle-punching process, and the arrangement direction of the fibers is originally a two-dimensional arrangement. The position of needle sticking will become a three-dimensional arrangement, which means that the direction of fiber arrangement will be changed after needle sticking. Here, the mechanical properties of the two directions of 0° and 90° are studied. From the experimental data, it can be seen that the mechanical stress tolerance of 0° and 90° is not good. Experimental group 3 uses a hot pressing process to replace the needle-punching process of experimental groups 1 and 2. The heating method of the hot pressing molding machine 50 is used to hot press the carbon fiber composite felt 100, and the protrusions of the rollers 51 are used. The contact points of the part 52 form a hot-melt bond, so that the first thermoplastic non-woven fiber layer 10, the carbon fiber layer 30 and the second thermoplastic non-woven fiber layer 20 of the three-layer structure are combined together, which can avoid the loss of the finished product during transportation. Because the structure is too loose and layered. Experimental group 3 is the best embodiment of the present invention. The mechanical properties of experimental group 3 are similar to those of the control group, and the value of mechanical stress is relatively stable.

Continuing the purpose of using carbon fiber (CF for short) as a carbon fiber composite material felt in the present invention is that carbon fiber is a high-strength and modulus high-temperature-resistant fiber, which is a high-end variety of chemical fiber; it is mainly composed of carbon atoms, with a diameter of about 5 -10 microns. To create carbon fibers, carbon atoms are bonded together in crystals, and the parallel alignment of the fiber long axes gives carbon fibers a rather high strength-to-volume ratio. Because carbon fiber plays the role of reinforcing material and mainly bears external force, and carbon fiber has many characteristics such as high hardness, high strength, light weight, high chemical resistance, high temperature resistance and low thermal expansion, it is suitable for a variety of use conditions and has many selective changes. The advantages can be widely used in aerospace engineering, civil engineering, military, racing and other competitive sports products. For example, when making products at the back end, it is only necessary to select carbon fiber composite mats of the required weight, cut or assemble them into the required size, heat and pressurize to melt the resin, and let the carbon fiber composite mats be impregnated. There is no limitation on which curing molding method is used. For example, if plastic resin is used as the impregnation material, since the plastic resin (or resin matrix) transmits stress load to the carbon fiber composite mat in the form of shear stress through the interface, at the same time, the resin matrix also protects the carbon fiber composite material. The felt is not affected by direct damage from the outside. When the carbon fiber composite material felt is molded with plastic resin, it has a very high strength-to-weight ratio carbon fiber reinforced product, and the value of the mechanical stress that can be tolerated between production batches is stable. As shown in Table (1), the required product shape is then cut according to the demand.

Please refer to Fig. 2 and Fig. 4 at the same time, and Fig. 4 is a flow chart of the steps of the present invention. The carbon fiber composite material manufacturing method includes step S1, providing a first thermoplastic non-woven fiber layer 10, through the fiber opening process, the air-laid process and the high-temperature hot-pressing process (for example, the high-temperature hot-pressing temperature range is between 160 degrees Celsius and 200 degrees Celsius. degree) made. As in step S2, a carbon fiber layer 30 is formed on the first thermoplastic non-woven fiber layer 10; the carbon fiber layer 30 is formed by an air-laid machine 60 through air-combing to generate two-dimensional or three-dimensional fiber orientations of carbon fibers, realizing various The isotropic performance also improves the product quality and yield rate, has industrial applicability and produces economical production value and high reliability and many other market competitive advantages. If the carbon fiber uses new yarn, leftovers or waste yarn, it must first go through the fiber opening process. As in step S3, a second thermoplastic non-woven fiber layer 20 is formed on the carbon fiber layer 30; the second thermoplastic non-woven fiber layer 20 is formed through a fiber-opening process, an air-laid process and a high-temperature hot-pressing process (such as high-temperature hot-pressing The temperature ranges from 160 degrees Celsius to 200 degrees Celsius), and then formed on the carbon fiber layer 30 .

In step S4 , the first thermoplastic non-woven fiber layer 10 , the carbon fiber layer 30 and the second thermoplastic non-woven fiber layer 20 are simultaneously hot-pressed in contact with multiple points to form a carbon fiber composite mat 100 . Wherein, between the carbon fiber layer 30 and the first thermoplastic non-woven fiber layer 10 and the second thermoplastic non-woven fiber layer 20 on its opposite surface, a thermocompression molding machine 50 is used to carry out plane and multiple point contact thermocompression to form a thermocompression molding machine. In combination, the hot pressing temperature range of the hot pressing molding machine 50 is between 240°C and 280°C. Wherein, the hot pressing forming machine 50 includes a roller 51, preferably a hot pressing wheel, and the outer edge ring of the hot pressing wheel is provided with a plurality of protrusions 52, such as bumps; In addition to the carbon fiber composite felt 100, in particular, a plurality of protrusions 52 are used to thermally heat the first thermoplastic non-woven fiber layer 10, the carbon fiber layer 30, and the second thermoplastic non-woven fiber layer 20 of a three-layer loose structure. The combination of fusion can form a solid three-layer structure, which is convenient for subsequent product manufacturing processes. The present invention uses a hot pressing process to replace the existing fiber composite material structure made of resin or viscose, which can save material cost, process time and labor cost.

Looking at the above, it can be seen that the present invention breaks through the previous technology and innovates and improves the carbon fiber composite material structure and its manufacturing method. You only need to select the carbon fiber composite material felt of the required weight, cut or piece it into the required size, lay it in the mold, and then cure and shape it through a hot press. Because the mixing of carbon fiber and thermoplastic fiber is more uniform, in addition to the better fluidity of thermoplastic fiber, the distribution of carbon fiber is also more uniform, which can effectively improve the quality of the end product. It has indeed achieved the desired effect, and I am not familiar with this item It is easy for those skilled in the art to think about it. Moreover, this invention has not been disclosed before the application, and its progressiveness and practicality have obviously met the requirements for patent application. I file a patent application according to law, and I sincerely request your bureau to approve this invention patent application. Case, to encourage invention, to appreciate virtue.

The above-described embodiments are only to illustrate the technical ideas and characteristics of the present invention, and its purpose is to enable those skilled in this art to understand the content of the present invention and implement it accordingly, and should not limit the patent scope of the present invention. That is to say, all equivalent changes or modifications made according to the spirit disclosed in the present invention should still be covered by the patent scope of the present invention.

100: carbon fiber composite felt 10: The first thermoplastic non-woven fiber layer 20: The second thermoplastic non-woven fiber layer 30: carbon fiber layer 40, 40': Opening machine 50: Thermoforming machine 51:Roller 52: convex part 60: Airlaid machine 200: Conveyor S1, S2, S3, S4: steps L: left R: right

Fig. 1 is a structural schematic diagram of the present invention. Fig. 2 is a schematic diagram of the structural steps of the present invention. Fig. 3 is a partially enlarged schematic diagram of the hot pressing forming process of the present invention. Fig. 4 is a flowchart of the steps of the present invention.

S1, S2, S3, S4: steps

Claims (10)

A thermoplastic carbon fiber composite material structure, comprising: a first thermoplastic non-woven fiber layer (10); a second thermoplastic non-woven fiber layer (20), wherein the first thermoplastic non-woven fiber layer (10) and the The second thermoplastic non-woven fiber layer (20) is formed by using a high-temperature hot press through a high-temperature hot-pressing process, and the temperature range is between 160 degrees Celsius and 200 degrees Celsius; and a carbon fiber layer (30), using a The thermocompression molding machine (50) carries out thermocompression, makes this carbon fiber layer (30) be positioned between this first thermoplastic nonwoven fabric fiber layer (10) and this second thermoplastic nonwoven fabric fiber layer (20), and makes a carbon fiber Composite felt, the thermocompression molding machine (50) includes a roller (51), the outer edge ring of the roller (51) is provided with a plurality of protrusions (52), the thermocompression temperature of the thermocompression molding machine (50) The range is between 240°C and 280°C. The thermoplastic carbon fiber composite material structure as claimed in claim 1, wherein the first thermoplastic non-woven fiber layer (10) and the second thermoplastic non-woven fiber layer (20) are all selected from the same material, and the material is selected from Polyethylene (PE), polypropylene (PP), polystyrene (PS), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), nylon (Nylon), polycarbonate (PC), polytetrafluoroethylene Polyethylene fluoride (PTFE), polyethylene terephthalate (PET), or polyoxymethylene (POM). The thermoplastic carbon fiber composite material structure according to claim 1, wherein the carbon fiber layer (30) is selected from virgin yarn, recycled yarn, leftovers or waste yarn. The thermoplastic carbon fiber composite material structure as claimed in item 1, wherein the first thermoplastic non-woven fiber layer (10), the second thermoplastic non-woven fiber layer (20) and the carbon fiber layer (30) are all controlled by an air flow The web forming machine (60) generates two-dimensional or three-dimensional fiber orientation through airflow carding and sorting, and the flow type is isotropic. The thermoplastic carbon fiber composite material structure according to claim 1, wherein the carbon fiber layer (30) and the first thermoplastic non-woven fiber layer (10) and the second thermoplastic non-woven fiber layer (20) on the opposite side thereof ) between the contact points of the protrusions (52) of the roller (51) to form thermal fusion bonding. A method for manufacturing a thermoplastic carbon fiber composite material, comprising: using a high-temperature hot press to provide a first thermoplastic non-woven fiber layer through a high-temperature hot-pressing process, and the temperature range is between 160 degrees Celsius and 200 degrees Celsius; A carbon fiber layer is formed on the thermoplastic non-woven fiber layer; a second thermoplastic non-woven fiber layer is formed on the carbon fiber layer through a high-temperature hot pressing process using the high-temperature hot press, and the temperature range is from 160 degrees Celsius to Celsius 200 degrees; and at the same time, the first thermoplastic non-woven fiber layer, the carbon fiber layer and the second thermoplastic non-woven fiber layer are subjected to plane and multiple point contact hot pressing to make a carbon fiber composite felt, the hot pressing The temperature range is between 240°C and 280°C. The manufacturing method of thermoplastic carbon fiber composite material as described in Claim 6, wherein the carbon fiber layer is formed by an air-laid machine (60) through air-combing to produce two-dimensional or three-dimensional fiber orientation of carbon fibers. The manufacturing method of thermoplastic carbon fiber composite material according to claim 6, wherein the carbon fibers in the carbon fiber layer are short fibers, and the length of the short fibers ranges from 30 mm to 120 mm. The manufacturing method of thermoplastic carbon fiber composite material as described in Claim 6, wherein the first thermoplastic non-woven fiber layer (10) and the second thermoplastic non-woven fiber layer (20) are both selected from polyethylene (PE), polyester Propylene (PP), polystyrene (PS), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), nylon (Nylon), polycarbonate (PC), polytetrafluoroethylene (PTFE), poly Polyethylene terephthalate (PET) or polyoxymethylene (POM). The manufacturing method of thermoplastic carbon fiber composite material according to claim 6, wherein the carbon fiber layer (30) is selected from recycled yarn, new yarn, leftovers or waste yarn.

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