JP5971795B2 - Carbon fiber composite resin beads, carbon fiber reinforced composite material, and method for producing the same - Google Patents

Description

  The present invention relates to a carbon fiber composite resin bead having a high fiber content, a method for producing the same, and a carbon fiber reinforced composite material comprising carbon fiber and a polymer resin. More specifically, the present invention relates to a carbon fiber composite resin bead and a carbon fiber. The present invention relates to a reinforced composite material, a production method thereof, a functional carbon fiber composite resin bead having a function of suppressing thermal deterioration of the composite material, and a composition thereof.

  In the technical field of carbon fiber reinforced resin compound or pellet material for compression, extrusion or injection molding and molded article thereof, the present invention relates to carbon fiber composite resin beads, carbon fiber reinforced composite material, and new technology and new product relating to the manufacturing method thereof. Is to provide.

  In recent years, carbon fiber reinforced resin materials (CFRP, CFRTP) reinforced with carbon fibers have been studied for application as materials that combine weight reduction and high rigidity, especially as chassis members for electronic parts and semi-structure members for automobiles. Being started. In the carbon fiber reinforced resin material as a general-purpose product, there is a great need to use discontinuous carbon fibers (long fibers, short fibers).

  In order to enhance the mechanical properties of carbon fiber reinforced resin, it is desirable to lengthen the carbon fiber to be reinforced or increase the carbon fiber content in the resin. The resin containing the carbon fiber is pelletized and compressed. Molded products are produced by heat and pressure molding such as extrusion and injection molding. In particular, the use of such a pellet material is a method suitable for increasing the productivity of a molded product.

  As a method for introducing a carbon fiber long fiber into a resin and pelletizing it, as a prior art, for example, an impregnation sland method in which a carbon fiber bundle is introduced into a molten thermoplastic resin and then cut and pelletized. (Patent Document 1) has been reported, but it requires a large facility, and its carbon fiber content is about 20% by weight.

  In addition, a method of introducing carbon fibers into an extruded melt kneaded state of a resin and cutting and pelletizing the extruded body is known as a known technique. For example, as a prior art, polypropylene resin compositions 60 to A resin composition (Patent Document 2) comprising 85 parts by weight, 15 to 40 parts by weight of PAN-based carbon fiber, and 0.1 to 5.0 parts by weight of solid carbon black has been reported.

  In addition, even if the ratio of recycled polyphenylene sulfide used as a material in the molded product is increased, the molded product retains the mechanical properties, heat resistance, chemical resistance, and dimensional stability inherent in the polyphenylene sulfide molded product. (Patent Document 3), and a resin compound material for molding for compression, extrusion or injection molding containing lignin, wherein the lignin is soluble in an organic solvent and the lignin is contained in an amount of 5 to 90% by mass. A resin compound material for molding containing (Patent Document 4) has been reported.

  However, in these extrusion kneading methods, the viscosity of the molten resin becomes extremely high as the carbon fiber content increases, so that the kneading of carbon fiber at 20 to 30% by volume is limited.

  Depending on the application, not only mechanical properties such as high rigidity but also thermal conductivity is required. Since the resin has a low thermal conductivity and the carbon fiber has a high thermal conductivity, when used in a component to which heat is applied, there is a problem that heat is generated in the material and the thermal history causes thermal degradation. At present, no countermeasure technology for such a problem has been disclosed as a publicly known fact, but the development of the countermeasure technology or a new carbon fiber reinforced resin material (CFRP) corresponding thereto is the safety and reliability of the material. From the point of view, it is necessary and important.

JP 2011-246621 A JP 2012-36247 A JP 2009-291986 A JP 2011-219715 A

  Here, the above-described resin pellets will be further described. In the production of the composite material, the method of supplying the resin powder and the carbon fiber individually or in a mixture and supplying them directly to the molding machine is particularly produced. This is desirable in consideration of sex. However, in such a method, there is a problem that the raw material resin powder or carbon fiber is hardened in the hopper, causing a bridging phenomenon, and further, there is a problem that quality variation occurs.

  In addition, since the fluidity of the mixture decreases as the amount of carbon fiber added increases, at present, it is difficult to knead the resin with a high amount of carbon fiber added, and further exhibits the flexibility of the resin characteristics of the pellets. Actually, it is difficult to make this happen, and there has been a strong demand in this technical field to develop a new technology for solving these problems.

  Under such circumstances, the present inventors have conducted extensive research to solve the above-mentioned problems, and as a result, when blending carbon fiber with resin, the mixed medium of carbon fiber and resin is rotated. In addition, it has been found that a product that solves these problems can be obtained by blending a functional filler into a resin, and carbon fiber having a high fiber content, which has been difficult in pellet production using a known kneading method. As a result of producing composite resin beads, the present inventors have succeeded in developing a carbon fiber composite resin composition capable of suppressing deterioration due to thermal history, thereby completing the present invention.

  This invention is made | formed in view of the above situations, and provides the manufacturing method of the carbon fiber composite resin pellet which can solve the various problems seen in the conventional material of a carbon fiber composite resin pellet, and its composition. It is intended to do. Another object of the present invention is to provide a carbon fiber composite resin bead excellent in handleability and workability that can be used for the production of carbon fiber reinforced plastic (CFRP / CFRTP) by increasing the volume content of carbon fiber. It is what. Furthermore, this invention aims at providing the molded object of the carbon fiber composite bead which suppresses deterioration by a heat history, and its carbon fiber composite resin composition.

The present invention for solving the above-described problems comprises the following technical means.
(1) A carbon fiber composite resin bead for heating and pressure molding containing a high content of carbon fiber, and the carbon fiber content is 30% by volume to 95% by volume. And a composite of carbon fiber and liquid resin is formed into beads by performing a stirring operation at 400 to 3000 revolutions per minute by a revolving and / or rotating stirring device. A method for producing carbon fiber composite resin beads.
(2) The method for producing carbon fiber composite resin beads according to (1), wherein the carbon fiber has a fiber length of 100 μm to 6 mm and a diameter of 5 μm to 15 μm.
(3) The above (1) or (1), wherein the resin is one or two or more polymer resins selected from the group consisting of polycarbonate, polyamide, polypropylene, polyethylene, acrylic resin, epoxy resin, phenol resin, and polyimide. The manufacturing method of the carbon fiber composite resin bead as described in 2).
(4) One or two or more types selected from the group consisting of alumina, magnesium oxide, zirconia, barium titanate, titanium dioxide, aluminum nitride, boron nitride, silicon nitride, silicon carbide, and silica as fillers in the resin. The manufacturing method of the carbon fiber composite resin bead in any one of said (1) to (3) including compounding an inorganic filler.
(5) The method for producing carbon fiber composite resin beads according to (4), wherein the stirring operation is performed after the filler is combined with the resin.
(6) The carbon according to (4) or (5), wherein compounding the filler with the resin includes forming a resin containing a filler of 0.1% by volume to 30% by volume. Manufacturing method of fiber composite resin beads.
(7) Carbon fiber composite resin beads having a carbon fiber content of 30% by volume or more and 95% by volume or less for heating and pressure molding including a high content of carbon fiber, A carbon fiber composite resin bead produced by mixing and forming a resin mixture into a bead by agitating operation at 400 to 3000 revolutions per minute with a stirring device that revolves and / or rotates , and heat-press molding A molded product of a carbon fiber reinforced composite resin composition characterized by being obtained as described above.

Next, the present invention will be described in more detail.
The carbon fiber composite resin beads of the present invention are pellets for heating and pressure molding for producing a molded product of a carbon fiber composite resin composition, and are simply resin like conventional carbon fiber composite resin pellets. It is not a mixture of powder and carbon fiber, but produced with a carbon fiber content in the range of 30% to 95% by volume.

  The carbon fiber composite resin beads by this manufacturing method are obtained by mixing carbon fiber in a liquid polymer resin or a polymer resin solution dissolved in a solvent, and compounding with a stirrer having revolution and / or rotation. It is a shape body, and the carbon fiber composite bead has flexibility and moldability under heating and pressurization.

  As the carbon fiber to be used, those having a fiber length of 100 μm to 6 mm can be used, and the fiber length is preferably 120 μm to 5 mm. In addition, carbon fibers having a diameter of 5 μm or more and 15 μm or less can be used, and the carbon fiber diameter is preferably 8 μm or more and 12 μm or less. If the fiber length is less than 100 μm, sufficient mechanical properties of the composition cannot be obtained, which is not preferable.

  In addition, fibers longer than 6 mm are not preferable because the fibers cannot be entangled in the composite process and beads cannot be formed. In addition, if the fiber diameter is less than 5 μm, the fiber may be broken at the time of kneading, and if it exceeds 15 μm, the rigidity of the fiber becomes strong and it is difficult to produce beads. In the formation of resin beads, it is not preferable.

  The resin to be used may be a thermosetting resin, a thermoplastic resin, or a mixture thereof, specifically, from the group consisting of polycarbonate, polyamide, polypropylene, polyethylene, acrylic resin, epoxy resin, phenol resin, and polyimide. One or more polymer resin materials selected can be selected. In this case, the type of resin is not limited, but a liquid resin or a polymer resin solution dissolved in a solvent at room temperature or under heating is suitably used for producing the carbon fiber composite resin beads of the present invention.

  The carbon fiber composite resin beads provided in the present invention are obtained by compounding with a stirrer having revolution and / or rotation. That is, carbon fiber and resin are mixed in a container, and after the container is placed in a stirrer, the revolution and / or rotation stirring operation is performed at 400 to 3000 rotations per minute, preferably 500 to 2000 rotations per minute. I do. Of course, there is no problem even if beads are formed only by revolution, but in order to improve spheroidization and fiber filling, it is preferable to perform a stirring operation in revolution and rotation.

  As a mixing ratio of the carbon fiber and the resin, it is preferable that the carbon fiber content of the produced carbon fiber composite resin beads is 30% by volume to 95% by volume, which is difficult by a normal kneading method. A high fiber content carbon fiber composite resin bead is formed. Therefore, a molded body can be produced from such a carbon fiber composite resin bead by heating and pressure molding methods such as compression, extrusion, and injection molding. A carbon fiber reinforced plastic (CFRP / CFRTP composite) having a high fiber content of 30 to 95% by volume can be produced.

  The fiber content of the carbon fiber composite resin beads in the present invention is preferably in the range of 30% to 95% by volume. If the fiber content is less than 30% by volume, the amount of the liquefied polymer resin is too large to form a uniform paste, but it cannot be formed into a composite bead. In addition, when the fiber content exceeds 95% by volume, the amount of resin for connecting the fibers or filling the gaps between the fibers is insufficient, and the bulk of the carbon fibers becomes too large, so that composite beads are formed. I can't. Therefore, it is preferable to manufacture composite beads with a carbon fiber content in the range of 30% to 95% by volume.

  Moreover, it is possible to manufacture carbon fiber composite beads having functionality by combining a filler such as high thermal conductivity with a matrix resin of carbon fiber composite resin beads. In this case, examples of the filler include one or more selected from the group consisting of alumina, magnesium oxide, zirconia, barium titanate, titanium dioxide, aluminum nitride, boron nitride, silicon nitride, silicon carbide, and silica. A functional carbon fiber resin bead structure can be manufactured by compounding these inorganic fillers with a resin and mixing the inorganic filler composite resin and carbon fiber in the above-described method and conditions.

  In the carbon fiber composite resin beads having the functionality of the present invention, the composite inorganic filler preferably does not exceed 30% by volume. If it exceeds 30% by volume, the fluidity of the composite resin may be impaired, and stirring and mixing with the carbon fiber may be difficult. Furthermore, when the amount of the inorganic filler is increased, an increase in weight as a material from the viewpoint of material cost may be caused, and the value as an industrial member may be impaired. Preferably, it is desirable to form a matrix resin having an inorganic filler content of 0.1 volume% or more and 30 volume% or less.

  The carbon fiber composite resin beads of the present invention have the following characteristics. That is, firstly, it is a bead obtained by mixing and stirring carbon fiber and polymer resin, and secondly, the fiber content of the carbon fiber composite resin bead is from 30% by volume to 95%. It is a bead-like structure having a high fiber content in the range of volume%.

  Third, the fiber length and fiber diameter of the carbon fibers constituting the carbon fiber composite resin beads are each in the range of 100 μm to 6 mm, preferably 5 μm to 15 μm. Fourth, the carbon fiber composite resin beads The polymer resin material is at least one kind or a plurality of kinds of resins. Fifth, using the produced carbon fiber composite resin beads, flexibility is exhibited by heating and pressing, and heating and pressing are performed. By molding, a carbon fiber reinforced plastic (CFRP / CFRTP) is formed with a high fiber content of 30 to 95% by volume.

  Sixth, thermal conductivity is added by introducing a functional inorganic filler in the range of 0.1 volume% to 30 volume% into the resin constituting the carbon fiber composite resin beads to be produced. By forming a carbon fiber composite resin bead having functionality and molding it by heating and pressing, it is possible to obtain a carbon fiber reinforced plastic (CFRP / CFRTP) having functionality. Furthermore, carbon fiber composite resin beads in the form of beads can be produced by mixing and mixing carbon fibers, inorganic fillers, and resins, and using a stirrer having revolution and / or rotation.

  Next, characteristics of the molded body as a carbon fiber reinforced composite resin composition using the carbon fiber composite resin beads provided in the present invention will be described.

  The carbon fiber composite resin bead of the present invention comprises 30% to 95% by volume of carbon fiber and a solid resin (in the case of thermoplastic) or a semi-solid resin (thermosetting) in a form filling the gaps between the carbon fibers. (In the case of resin). Therefore, it is possible to perform molding using heating and pressurization such as a heating press machine, an extrusion molding machine, an injection molding machine, a roll machine, that is, a known molding method.

  In this molding, the resin is melted and softened by heating, and the carbon fiber composite resin beads exhibit flexibility, and can be deformed and molded by pressurization. As a result, an easily moldable carbon fiber reinforced plastic (CFRP / CFRTP) material having a high fiber content and a molded body thereof are obtained.

  As described above, even if an inorganic filler having functionality is introduced into the matrix resin constituting the carbon fiber composite resin beads, it is possible to produce a molded body by the above molding method, Functionality can be imparted to the carbon fiber reinforced plastic.

  As will be described in detail in Examples described later, for example, when boron nitride having high thermal conductivity is kneaded with a resin at 10% by volume, the thermal conductivity of the composite resin becomes about 1 W / mK. By mixing and stirring the boron nitride composite resin and the carbon fiber, a structure of carbon fiber composite resin beads containing a boron nitride filler is formed by the method described above.

  The thermal conductivity of the molded body after the molding shows a value almost equal to the thermal conductivity of the composite resin, but this characteristic suppresses thermal segregation of the molded body, and the thermal conductivity of the carbon fiber reinforced plastic. Suppress deterioration. This is because carbon fiber has thermal conductivity, but resin has low thermal conductivity, so when heat is applied to the molded body, there is no place for the release of heat added to the carbon fiber, causing deterioration of the resin. Because it ends up.

  In this way, by introducing the functional inorganic filler into the structure of the carbon fiber composite resin beads, functional beads, that is, functional carbon fiber composite resin beads are formed. Have.

  FIG. 1 is an explanatory view schematically showing the structure of the carbon fiber composite resin beads. In the figure, 1 is a resin, 2 is a carbon fiber, and 3 is an inorganic filler. Whether to introduce the three inorganic fillers into the structure body may be determined by the carbon fiber composite resin beads to be obtained and the carbon fiber reinforced plastic as a molded body.

  Moreover, the carbon fiber composite resin beads to be used may have a single diameter or carbon fiber composite resin beads having different particle diameters. When heated and pressurized, if the beads show flexibility and part of the resin oozes out, the carbon fiber composite resin beads are joined together and the carbon fibers and the gaps are filled with the resin. The molding can be processed regardless of the size of the molded body, and without questioning the thickness.

  As described above, in the present invention, a carbon fiber composite resin bead having a high fiber content composed of carbon fiber and resin is obtained. That is, the carbon fiber reinforced plastic can be easily manufactured. Since the carbon fiber composite resin beads can be handled in the same manner as those used as conventional pellets, the productivity and processability of the molded body are improved. As described above, the present invention is extremely significant in various industries for manufacturing products using carbon fiber reinforced plastics, for example, as carbon fiber reinforced plastic structural members mounted on automobiles, aircrafts, electronic devices and the like. Useful.

The following effects are exhibited by the present invention.
(1) The carbon fiber composite resin beads of the present invention contain carbon fibers having a very high fiber content of 30% to 95% by volume in the beads, and are flexible by heating and pressurization. Therefore, a hot pressing method such as compression, extrusion, injection molding or the like can be applied, and a molded product having a fiber content of 30% by volume to 95% by volume, that is, a high-fiber-containing carbon fiber reinforced plastic can be obtained.
(2) High-quality carbon fiber composite plastic (CFRP / CFRTP) molding with a small number of voids and easily with any shape by heating and pressure molding using the carbon fiber composite resin beads of the present invention Can be processed into a body.
(3) It is possible to manufacture a structure in which a thermally conductive filler is introduced into a matrix resin in a carbon fiber composite resin bead. By improving the thermal conductivity of the matrix resin, A carbon fiber composite plastic (CFRP / CFRTP) that does not generate heat and suppresses thermal deterioration can be produced by a simple method.
(4) The carbon fiber composite resin beads of the present invention can be used as a pellet material, so that a molded product of carbon fiber reinforced plastic can be produced with high productivity.
(5) Since the carbon fiber composite resin beads of the present invention can introduce a heat conductive filler into the matrix resin and can produce a carbon fiber reinforced plastic having the characteristics, it is necessary to have thermal characteristics and mechanical strength. It is applicable to various partial products.

It is explanatory drawing which shows the concept of the carbon fiber composite resin bead of this invention. 2 is an appearance photograph of the carbon fiber composite resin beads of Example 1. FIG. 2 is a cross-sectional photograph of a carbon fiber composite resin bead of Example 1. FIG. The carbon fiber composite bead comprised from the polycarbonate and carbon fiber is shown. The heat conductivity of the compression molding body shape | molded from the carbon fiber composite resin bead of Example 4 is shown. It is a photograph which shows the mode of thermal deterioration of the molded object produced in Example 2 and Example 3, and suppression of thermal deterioration.

  EXAMPLES Next, although an Example demonstrates this invention concretely, this invention is not limited at all by these Examples.

[Production of carbon fiber composite resin beads and carbon fiber reinforced plastic]
Carbon fiber (fiber length: 250 μm, fiber diameter: 10 μm) as a raw material fiber is blended in a mixed solution of a liquid epoxy resin and its curing agent so that the fiber content is 50% by volume, and rotation and rotation are performed at room temperature. The mixture was mixed with a stirrer having a rotating process for 9 minutes. As a result, carbon fiber composite resin beads as shown in FIG. 2 were obtained. A cross-sectional photograph of the beads is shown in FIG. From the figure, it can be seen that the voids are hardly seen in the cross section of the beads, and the epoxy resin is filled so as to fill the gaps between the carbon fibers.

  The carbon fiber composite resin beads thus produced were packed in a mold and subjected to heat compression molding at a temperature of 100 ° C. and a pressure of 80 MPa to produce a carbon fiber reinforced plastic. The carbon fiber content of the molded body is 50% by volume, and a molded body having a high fiber content, that is, a thermosetting carbon fiber reinforced plastic (CFRP) similar to the carbon fiber content prepared at the beginning, is obtained. confirmed.

[Production of carbon fiber composite resin beads and carbon fiber reinforced plastic]
In this example, the same carbon fiber as in Example 1 and a polycarbonate solution dissolved in toluene were prepared. First, carbon fiber was mixed so that it might become 60 volume% with respect to polycarbonate, it mixed with the stirrer which has revolution and rotation at room temperature, and the rotation process was performed for 5 minutes. As a result, carbon fiber composite resin beads made of thermoplastic resin as shown in FIG. 4 were formed. From the figure, it can be seen that the bead surface and cross section have voids due to the evaporation of the solvent.

  The carbon fiber composite resin beads thus produced were packed in a mold and subjected to heat compression molding at a temperature of 265 ° C. and a pressure of 40 MPa to produce a carbon fiber reinforced plastic. The carbon fiber content of the molded product is 60% by volume, and a molded product having a high fiber content similar to the carbon fiber content prepared at the beginning, that is, a thermoplastic carbon fiber reinforced plastic CFRP (CFRTP) is obtained. confirmed.

  Thus, even if there are voids in the beads themselves, the carbon fiber composite resin beads show flexibility by heating and pressing and the resin is filled between the carbon fibers. It was confirmed that a thermoplastic carbon fiber reinforced plastic (CFRTP) composed of a thermoplastic resin having a content was obtained.

[Functionalization of functional carbon fiber composite resin beads]
In this example, in order to functionalize the carbon fiber composite resin beads, improvement in thermal conductivity was examined. Boron nitride having high thermal conductivity was used as an inorganic filler, and this was added to and mixed with a mixed solution of a liquid epoxy and a curing agent so as to be 10% by volume to obtain a boron nitride composite resin paste. Separately, this is mixed with polycarbonate pellets so as to be 10% by volume, and the mixture is introduced into a single-screw extrusion kneader, and kneaded and extruded at 260 ° C. to obtain boron nitride composite resin pellets. Produced.

  First, carbon fiber was blended with the boron nitride composite resin paste so as to be 50% by volume, and stirred under the same conditions as in Example 1. Secondly, boron nitride composite resin pellets produced using polycarbonate are dissolved in toluene as in Example 2, and carbon fibers are mixed and stirred so that the fiber content is 60% by volume. Went.

  As a result, it was confirmed that carbon fiber composite resin beads can be obtained from an epoxy resin containing 10% by volume of boron nitride and polycarbonate. By performing heat compression molding using these carbon fiber composite resin beads, a carbon fiber composite composition containing 10% by volume of boron nitride, that is, carbon fiber reinforced plastic composited with boron nitride (CFRP / CFRTP) Succeeded in getting. The carbon fiber content maintained the fiber content originally blended.

[Thermal conductivity of carbon fiber reinforced plastic]
In this example, the thermal conductivity of the carbon fiber reinforced plastic produced in Example 3 was examined. The thermal conductivity was measured by a laser flash method. FIG. 5 shows the thermal conductivity of the carbon fiber reinforced plastic (CFRP) of Example 3 made from an epoxy resin compounded with boron nitride, and a boron nitride compound resin (CF fiber) not compounded with carbon fiber as a comparative example. The thermal conductivity of the epoxy) and the thermal conductivity of the epoxy alone are shown.

  As is clear from the figure, the thermal conductivity of the epoxy alone is 0.19 W / mK, and the thermal conductivity of the boron nitride composite resin is 1.01 W / mK. Example 3 developed in the present invention The carbon fiber reinforced plastic (CFRP) produced from the carbon fiber composite resin beads has a thermal conductivity of 1.13 W / mK. From these results, the thermal conductivity of the matrix resin is determined by the carbon fiber reinforced plastic (CFRP). It was confirmed that the thermal conductivity was added.

[Inhibition of thermal deterioration of carbon fiber reinforced plastic]
In this example, regarding the carbon fiber reinforced plastic (CFRP) produced in Example 3, the form of thermal deterioration due to heating was examined. The heating was performed by applying microwave irradiation of 1500 W for 30 seconds. As a result, the carbon fiber reinforced plastics (CFRP and CFRTP) produced in Examples 1 and 2 were thermally deteriorated and the surface was damaged.

  On the other hand, the surface appearance of the carbon fiber reinforced plastics (CFRP and CFRTP) produced in Example 3 was not changed, and thermal segregation was alleviated by using the thermally conductive matrix composite resin, so that thermal degradation was caused. It was thought that it was able to be suppressed. FIG. 6 shows the state of thermal deterioration using a thermoplastic resin as a matrix and the state of its suppression.

  As described above in detail, the present invention relates to a carbon fiber composite resin bead, a composite material composed of carbon fiber and a polymer resin, and a method for producing the same. According to the present invention, the carbon fiber composite resin bead of the present invention is The beads contain very high carbon fibers with a carbon fiber content of 30 to 95 volume%, and become flexible by heating and pressurization, so compression, extrusion, injection molding, etc. Thus, a molded product having a carbon fiber content of 30% by volume to 95% by volume can be obtained. The carbon fiber composite resin beads of the present invention can be processed into a high-quality carbon fiber composite plastic (CFRP / CFRTP) molded body having a small number of voids by heat-pressing the carbon fiber composite resin beads of the present invention. . The present invention makes it possible to produce a structure in which a thermally conductive filler is introduced into a matrix resin in a carbon fiber composite resin bead. By improving the thermal conductivity of the matrix resin, the carbon fiber composite The resin material is useful as a material capable of producing a carbon fiber composite plastic (CFRP / CFRTP) that does not generate heat and suppresses thermal degradation.

(Reference in FIG. 1)
1 Resin 2 Carbon fiber 3 Inorganic filler

Claims (7)

A carbon fiber composite resin bead for heating and pressure molding containing a high content of carbon fiber, and a method for producing a carbon fiber composite resin bead having a carbon fiber content of 30% by volume to 95% by volume There,
A carbon fiber composite resin bead characterized in that a mixture of carbon fiber and liquid resin is formed into a bead by performing a stirring operation at 400 to 3000 revolutions per minute by a revolving and / or rotating stirrer. Production method.   The method for producing carbon fiber composite resin beads according to claim 1, wherein the carbon fiber has a fiber length of 100 µm to 6 mm and a diameter of 5 µm to 15 µm.   The carbon according to claim 1 or 2, wherein the resin is one or more polymer resins selected from the group consisting of polycarbonate, polyamide, polypropylene, polyethylene, acrylic resin, epoxy resin, phenol resin, and polyimide. Manufacturing method of fiber composite resin beads.   One or more inorganic fillers selected from the group consisting of alumina, magnesium oxide, zirconia, barium titanate, titanium dioxide, aluminum nitride, boron nitride, silicon nitride, silicon carbide, and silica are used as fillers in the resin. The manufacturing method of the carbon fiber composite resin bead in any one of Claim 1 to 3 including combining.   The method for producing carbon fiber composite resin beads according to claim 4, wherein the stirring operation is performed after the filler is combined with the resin.   6. The production of carbon fiber composite resin beads according to claim 4 or 5, wherein compounding the filler with the resin comprises forming a resin containing 0.1% by volume to 30% by volume of filler. Method. Carbon fiber composite resin beads having a carbon fiber content of 30% by volume or more and 95% by volume or less for heating and pressure molding including a high content of carbon fiber, and a mixture of carbon fiber and liquid resin The carbon fiber composite resin beads produced by performing the agitation operation at 400 to 3000 revolutions per minute by a revolving and / or rotating stirrer and forming the beads into beads are obtained by heat and pressure molding. A molded product of a carbon fiber reinforced composite resin composition, wherein