JPH11188797A - Fiber reinforced resin molded product and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make moldability easy while strength, rigidity, and impact resistance are provided by a method wherein an weight-average length of a fiber contained in a fiber reinforced resin molded product and a value based on a fiber content are allowed to have specific values. SOLUTION: A fiber contained in a fiber reinforced resin molded product is allowed to have a value of 7 or over up to and including 600 in the formula: Σ(1wa×Wf). Herein, 1wa indicates an weight-average fiber length (mm) of the fiber contained in the fiber reinforced resin molded product, Wf indicates a fiber content (wt.%), and Σ means, when the fiber contained in the fiber reinforced resin molded product has a plurality of kinds, that values in the parenthesis are totalized for each fiber. When Wf is 8 wt.% or over up to and including 70 wt.%, or 1wa is 0.1 mm or over up to and including 10 mm, mechanical properties such as strength, rigidity, impact resistance, etc., come to have an optimum balance, and moldability becomes especially good. Further, as the resin, a thermoplastic resin which is more excellent in impact resistance and can be injection molded, is preferable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber-reinforced resin molded article which has strength, rigidity and impact resistance and is easily molded. More specifically, the present invention relates to a fiber-reinforced resin molded article having both strength, rigidity, impact resistance, and conductivity, and which is easy to mold.

[0002]

2. Description of the Related Art It is known to obtain a fiber-reinforced resin molded product having a desired strength and elastic modulus by reinforcing a resin with fibers. However, as the strength and rigidity of a molded article are improved by using high-strength and high-modulus fibers, impact resistance often decreases. Therefore, in order to simultaneously achieve the strength, rigidity and impact resistance, for example, a method of including a fiber having a certain length or more in a fiber-reinforced resin molded article has been tried (for example, see Japanese Patent Application Laid-Open No. Hei 5- 208418). However, this method has a great effect on strength, rigidity and impact resistance, but has a problem that the fluidity of the fiber-reinforced resin composition at the time of molding is extremely poor and the moldability is low.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a fiber-reinforced resin molded article which has both strength, rigidity and impact resistance, and is easy to mold.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above-mentioned object, and as a result, have found that the weight average length lwa (or contained in the molding material) of the fibers contained in the fiber-reinforced resin molded product It has been found that such an object can be achieved specifically when the two factors of the weight average length lwb) of the fiber to be obtained and the fiber content Wf satisfy a specific relationship, and arrived at the present invention. That is, the present invention is basically achieved by the following configurations in order to solve the above-mentioned problems. That is,
"A fiber-reinforced resin molded article characterized in that the fiber contained in the fiber-reinforced resin molded article has a value of 7 or more and 600 or less in the following (Formula 1).

(Equation 1) Σ (lwa × Wf) (where lwa represents the weight average fiber length (mm) of the fiber contained in the fiber-reinforced resin molded product, and Wf represents the fiber content (% by weight); Σ means that when there are a plurality of types of fibers contained in the fiber-reinforced resin molded product, the values in parentheses are totaled for each fiber.)

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail.

In order to achieve the above object, it is necessary that the fiber in the molded article has a value of (Equation 1) of 7 or more and 600 or less.

(Equation 1) Σ (lwa × Wf) Here, lwa indicates the weight average fiber length (mm) of the fiber contained in the fiber-reinforced resin molded product, and Wf indicates the fiber content (% by weight). Means that when there are a plurality of types of fibers contained in the fiber-reinforced resin molded product, the values in parentheses are totaled for each fiber.

The lwa is obtained by removing the resin from the fiber-reinforced resin molded product, extracting at least 400 fibers arbitrarily, measuring the length of the fiber up to 1 μm using an optical or scanning electron microscope. It is calculated by (Equation 3) or (Equation 4). Here, Wi is the weight of the fiber of length li, and Ni is the number of fibers of length li.

(Equation 3) lwa = Σ (Wi × li) / ΣWi (Equation 3) can be expressed as (Equation 4) for a fiber having a constant diameter.

(Formula 4) lwa = Σ (Ni × li ² ) / Σ (Ni × li) As a method of removing the resin when measuring lwa, a solvent in which only the resin is dissolved and the contained fiber is not dissolved For example, a method was used in which a fiber-reinforced resin molded product was immersed for a certain period of time to sufficiently dissolve the resin, and then separated from fibers by filtration or the like. In particular, when the contained fiber is excellent in heat resistance, the resin can be removed by holding the fiber-reinforced resin molded product at 550 ° C. for about 1 hour in a nitrogen atmosphere.

A fiber-reinforced resin molded product containing a fiber having a value of (Equation 1) of less than 7 can have a somewhat high strength and rigidity if Wf is 20% by weight or more, and can be easily molded. However, the impact resistance is extremely low, and the above-mentioned problem cannot be achieved.

However, a fiber-reinforced resin molded article containing a fiber having a value of (Expression 1) of 7 or more does not show significant improvement in strength and rigidity, but has a large impact resistance after 7 To be improved. In addition, the inventors have found that if the value of (Equation 1) is 600 or less, there is substantially no problem in moldability. However, the value of (Equation 1) is 6
When it exceeds 00, it can have both strength, rigidity and impact resistance, but it hinders molding and also greatly reduces productivity. That is, in the present invention, it has been found that when the value of (Formula 1) is 7 or more and 600 or less, a fiber-reinforced resin molded product having both strength, rigidity, and impact resistance can be obtained with high productivity. The value of (Equation 1) is more preferably 8 or more and 500 or less. More preferably, it is 10 or more and 400 or less.

The fiber-reinforced resin molded product of the present invention is molded by injection molding, press molding, transfer molding, or the like. The most desirable molding method is injection molding with high productivity. The form of the molding material may be pellet, BM
C, SMC, stampable sheet and the like can be mentioned, and the most desirable molding material is pellet. Here, the pellet generally refers to one obtained by supplying a resin and chopped yarn or a continuous yarn by an extruder, kneading in an extruder, extruding, and pelletizing, and in a longitudinal direction of the pellet. It refers to one in which the fiber length in the pellet is shorter than the length, but the pellet referred to here also includes a long fiber pellet. What is long fiber pellets?
As shown in JP-A-37694, the fibers are arranged substantially parallel to the longitudinal direction of the pellet, and the fiber length in the pellet is equal to or longer than the pellet length. In this case, the resin may be impregnated in the fiber bundle or may be coated on the surface of the fiber bundle. As described above, as a molding material, especially in the case of a long fiber pellet coated with a resin, the fiber bundle may be previously impregnated with a resin having the same or lower molecular weight than the coated one. . For example, when the coated material is a polyamide resin, the fiber bundle may be impregnated with a low molecular weight polyamide, epoxy, terpene / phenol, or the like. Among the above-mentioned pellets, long fiber pellets are particularly desirable as a molding material in order to satisfy (Equation 1).

In order to attain the above-mentioned range of the value of (Equation 1) in a fiber-reinforced resin molded product obtained by injection molding using pellets, in particular, the effects of molding conditions, an injection molding machine, and a mold are taken into consideration. There must be. As for the molding conditions, the lower the back pressure, the lower the injection speed, and the lower the screw rotation speed, the longer the lwa tends to be,
In particular, it is desirable to set the back pressure as low as possible so as not to make the measuring property unstable. Desirable back pressure is 1-10k
gf / cm ² . As for the injection molding machine, lwa tends to increase as the nozzle diameter increases, as the screw groove depth increases, and as the compression ratio decreases. For the mold,
As the sprue diameter increases and the gate diameter increases, lwa tends to increase. By combining these factors and Wf, it is possible to control the value within the range of (Equation 1).

In the formula (1), Wf is not less than 8 wt% and not more than 70 wt%, or lwa is not less than 0.1 mm and not more than 10 wt%.
When it is less than mm, it is desirable because not only mechanical properties such as strength, rigidity and impact resistance can be achieved in the most appropriate balance, but also the moldability when molding a fiber-reinforced resin molded article is particularly excellent. More preferably, Wf is 10% by weight or more and 45% by weight or less, and lwa is 0.2 mm or more and 7 mm or less.

In order to mold the fiber-reinforced resin molded article of the present invention, it is preferable to use a molding material having a value of (Equation 2) of from 20 to 1,000. Here, lwb represents the weight average fiber length (mm) of the fibers contained in the molding material, Wf represents the fiber content (% by weight), and Δ represents the case where there are a plurality of types of fibers contained in the molding material. , Means summing the values in parentheses for each fiber. If the value of (Formula 2) exceeds 1000, the fluidity of the material in the molding step is significantly reduced, and the moldability is greatly impaired. For example, in the case of injection molding, not only the appearance deteriorates, but also the injection molding itself becomes difficult due to clogging of the gate and the like. In the case of press molding or transfer molding, the shapeability of the molding is greatly impaired, and not only defects such as voids are introduced into the fiber-reinforced resin molded product, but also the fiber dispersion becomes non-uniform. Becomes large. On the other hand, (Equation 2)
Is less than 20, it is difficult to maintain the value of (Formula 1) at 7 or more in the molded product, and it is difficult to obtain a desired fiber-reinforced resin molded product. The preferable range of the value of (Formula 2) in the molding material is 25 or more and 800 or less. The more preferable range of the value of (Equation 2) is 30 or more and 60 or more.
0 or less.

In particular, when a fiber-reinforced resin molded article is molded by injection molding, if the fluidity of the molding material during molding is extremely poor, the surface smoothness is impaired due to the occurrence of flow marks, floating of fibers, etc. The lines are conspicuous and the appearance is poor. Further, since the injection molding becomes difficult due to clogging of the gate or the like, the range of the value of (Equation 2) is 30 to 60.
It is more preferable to use a molding material containing 0 or less fibers.

The resin used in the present invention may be either thermoplastic or thermosetting. Desirably, a thermoplastic resin having excellent impact resistance and capable of injection molding is preferred. For example, polyesters such as polyethylene terephthalate and polybutylene terephthalate, liquid crystal polyesters, polyolefins such as polyethylene and polypropylene and polybutylene, polyoxymethylene, polyamide, polycarbonate, polystyrene, styrene-acrylonitrile copolymer, acrylonitrile-butadiene-styrene copolymer, Acrylate / styrene / acrylonitrile copolymer, polymethylene methacrylate, polyvinyl chloride,
Polyphenylene sulfide, polyphenylene ether,
Polyimide, polyamide imide, polyether imide,
Examples thereof include polysulfone, polyether sulfone, polyether ketone, and polyether ether ketone, and also include copolymers, modified products thereof, and resins in which two or more kinds are blended. Further, in order to further improve impact resistance, a resin obtained by adding an elastomer or a rubber component to the above resin is also included.

Since the fiber-reinforced resin molded article of the present invention has both strength, rigidity and impact resistance, it can be made thinner than a conventional molded article, and has a thickness of 4 times.
Optimally, it is used as a thin molded product having a thickness of not more than mm. Preferably, the effect of the present invention can be further exhibited when used as a thin molded product having a thickness of 3 mm or less. More preferably, it is used as a thin molded product having a thickness of 2 mm or less. Here, the thickness of the molded product refers to the thickness of a flat portion of the molded product excluding protrusions such as a rib portion and a boss portion.

The fibers used in the present invention include carbon fibers such as PAN, pitch and rayon, glass fibers such as S-glass and E-glass, and aramid fibers, as well as boron fibers, silicon carbide fibers and silicon nitride. Inorganic fibers such as ride fibers, metal fibers such as stainless steel fibers and copper fibers,
Organic fibers such as polyester fibers, nylon fibers, and polyphenylene sulfide fibers, and include fibers obtained by applying post-processing such as metal coating such as nickel and copper, and fibers obtained by blending two or more of these. The above reinforcing fibers are surface-treated with silane coupling agent, aluminate coupling agent, titanate coupling agent, etc., and bundled with urethane resin, epoxy resin, polyester resin, styrene resin, olefin resin, amide resin. It may have been processed.

Desirably, the reinforcing fibers have strength, rigidity,
It is preferable to use carbon fiber which has both impact resistance, is lightweight, and can be expected to have an electromagnetic wave shielding effect by imparting conductivity. In this case, the carbon fiber may be coated with a metal, or a carbon fiber with and without a coating may be used in combination. When carbon fiber is used as the reinforcing fiber, a resin molded product satisfying the condition of claim 1 has high conductivity with a volume resistivity of 5 Ωcm or less, and is suitable as an electromagnetic wave shielding material. The metal coated on the carbon fiber is nickel,
Copper, silver, gold and the like can be mentioned, and it is preferable to coat one or more layers among them.

In order to control the value within the range of the expression (1) according to claim 1, the tensile elongation at break is 1.5% or more, more preferably, the elongation at break. Is 1.7% or more, and more desirably, the tensile elongation at break is 1.9%.
It is preferable to use the above carbon fibers. The reason is that the higher the elongation at break, the more difficult the carbon fiber is to be cut in the forming step, and the larger the lwa in (Formula 1), the smaller the W
This is because a desired value can be achieved with f. The elongation at break has no particular upper limit, but is generally less than 3%. As the carbon fiber, P having an excellent balance between tensile strength and elastic modulus is used.
AN-based carbon fibers are desirable. Further, the fiber-reinforced resin molded article of the present invention, depending on the purpose, potassium titanate,
Inorganic whiskers such as titanium oxide, carbon black, metal powder, metal flakes, glass beads, glass balloons,
Any filler such as glass flakes, talc, mica, clay, silica, calcium carbonate, wollastenite, polymer particles and the like may be used. These may be subjected to any treatment such as conductor coating, surface modification, and doping.

For imparting conductivity, it is preferable to use a conductivity-imparting agent such as potassium titanate whisker, carbon black, metal powder, metal flakes and the like coated with a conductor. In order to improve the appearance, it is preferable to make the surface roughness uniform by filling with potassium titanate, titanium oxide, glass beads, glass balloons, glass flakes, and the like. In addition, in order to prevent warpage of molded products due to shrinkage anisotropy,
Relaxation of shrinkage anisotropy by filling with potassium titanate, titanium oxide, talc, mica, clay, polymer particles and the like is preferable.

The thin-walled molded product of the present invention is used for parts for electronic and electric equipment which are required to have strength, rigidity and impact resistance, especially for housings and casings of portable electronic and electric equipment which are required to be light in weight. No. More specifically, notebook computers, mobile phones, PHS, PD
A (a portable information terminal such as an electronic organizer), a video camera, a housing and a casing of a portable radio cassette player, and the like. In particular, when a fiber-reinforced resin molded product is used in the United States, it is desirable that a 1/32 inch plate thickness has a flame retardancy of V-0 or more in UL standard.

When the fiber-reinforced resin molded article of the present invention is molded by injection molding, as described above, if the resin composition to be injected is poor in fluidity, the surface smoothness and appearance are impaired. Is preferably low in viscosity.
Specifically, the melt viscosity at the molding temperature is 10,000 poises or less, preferably 5000 poises or less,
More preferably, those having 3000 poises or less are good. Here, the melt viscosity is determined by the Vicat softening temperature (JIS K720).
6) or 30 ° C from the melting point determined by DSC
It refers to a value measured by a Koka type flow tester having a nozzle radius of 0.5 mm and a nozzle length of 1.0 mm at a high temperature and a pressure of 20 kgf / cm ² .

The matrix resin used in the present invention is preferably a polyamide resin from the viewpoint of the interfacial adhesion between the resin and the fiber. The polyamide resin is, for example, nylon 4, nylon 6, nylon 66, nylon 10, nylon 1
Aliphatic nylons such as 1, nylon 12, nylon 46,
Aromatic nylons such as polyhexadiamine terephthalamide, polyhexamethylene diamine isophthalamide, xylene group-containing polyamide, and copolymers thereof,
It means a modified product, a resin blended with two or more kinds, and the like.

The fiber-reinforced resin molded article of the present invention may further contain, depending on its purpose, a flame retardant, a flame retardant auxiliary, a pigment, a dye, a lubricant, a release agent, a plasticizer, a heat stabilizer, an antioxidant, Optional additives such as an ultraviolet absorber, a fluidity modifier, a foaming agent, and an antistatic agent may be used.

[0029]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which do not limit the present invention.
Modifications and alterations that do not depart from the gist of the preceding and following descriptions are all included in the technical scope of the present invention.

The lwa (or lwb) used in this embodiment
Used the analysis and measurement method as described above. However, the dissolution is performed by immersing the fiber-reinforced resin molded product (or molding material) in a suitable solvent at 25 ° C. for at least 6 hours or more, and the filtration is performed using a filter paper (JIS P3801).
(3 types) under no pressure.

For ε, the catalog value of the product used was quoted.

The impact resistance is represented by a Dynestat impact value (denoted as DY in Table 1) which is estimated to most accurately reproduce the impact resistance of an actual molded product. The test was performed using a 10 kg · cm dynestat impact tester. In this embodiment, width 300 mm × length 210 mm
X 10mm width x 15m length from molded product of 1.3mm thickness
A test piece of mx 1.3 mm in thickness was cut out from the same place and used for the test. Due to the design of the testing machine, the distance L from the center point of the impact to the clamp was 5.0 mm.

Regarding the strength and the elastic modulus (denoted by σ and E in Table 1), a three-point bending test (ASTM D79)
0). The test was performed using a universal testing machine at a distance between spans L / thickness D = 16. The test piece dimensions were 12.7 mm in width × 101.6 mm in length × 6.4 mm in thickness.

With respect to the volume resistivity (represented by VR in Table 1), the dimensions of the test piece were 12.7 mm in width × 60 m in length.
It measured using the test piece of mx 2 mm in thickness. First, a conductive paste is applied to the width × thickness surface, and the surface is pressed against the electrodes, and the resistance value between the electrodes is measured. The measured value was multiplied by the area of the conductive paste application surface, and then divided by the length of the test piece to obtain a volume resistivity value.

(Examples 1 to 8) The molten resin was extruded using an extruder, and the fiber bundle was impregnated into the fiber bundle by continuously feeding the fiber bundle into a crosshead die attached to the tip of the extruder. The fiber reinforced resin strand is drawn and formed. The strand is cut to obtain a long fiber pellet. The type of resin and fiber used, fiber length, and fiber content are as shown in Table 1.

After the obtained pellets were dried in vacuum at 100 ° C. for 5 hours or more, they were cut by an injection molding machine at a cylinder temperature of 290 ° C. and a mold temperature of 80 ° C. for the purpose of cutting out a test piece for evaluating a Dynestat impact value. A fiber reinforced resin molded product, a three-point bending evaluation fiber reinforced resin molded product, and a volume specific resistance evaluation fiber reinforced resin molded product were injection molded. Table 1 shows the evaluation results.
Shown in All of the materials have high strength and rigidity, and also have high Dynestat impact values. When carbon fibers are used as the reinforcing fibers, the volume specific resistance values are all 5 Ω · cm or less, and a high electromagnetic wave shielding effect is expected. In addition, the moldability was all good, and the appearance of the fiber-reinforced resin molded product was also good.

Example 9 After a fiber cut into a length of 10 mm was randomly oriented on a melted resin, the fiber was impregnated with the resin by pressing to obtain a stampable sheet. The types of resin and fiber, and the fiber content in the molded product are as shown in Table 1.

After the obtained stampable sheet was dried in vacuum at 100 ° C. for 5 hours or more, the mold temperature was 275 ° C.
, Dine Stat impact value evaluation test fiber cutout fiber reinforced resin molded product, 3-point bending evaluation fiber reinforced resin molded product,
In addition, a fiber-reinforced resin molded product for volume specific resistance evaluation was press-molded. Table 1 shows the evaluation results. High strength and rigidity,
In addition, the Dynestat impact value is very high. Since the volume resistivity is also 0.1 Ω · cm, a very high electromagnetic wave shielding effect is expected. The appearance of the fiber-reinforced resin molded product was also good.

(Comparative Examples 1 to 5) Compound pellets were obtained by continuously feeding a fiber bundle into a molten resin in an extruder using a side feeder. The types of resin and fiber, the fiber length in the molded product, and the fiber content are as shown in Table 1. The obtained pellets were dried in vacuum at 100 ° C. for 5 hours or more in the same manner as in Examples 1 to 8, and then subjected to a Dine stat impact using an injection molding machine at a cylinder temperature of 290 ° C. and a mold temperature of 80 ° C. A fiber reinforced resin molded product for cutting out a value evaluation test piece, a fiber reinforced resin molded product for three-point bending evaluation, and a fiber reinforced resin molded product for volume specific resistance evaluation were injection molded. Table 1 shows the evaluation results. Examples 1 to 8
Although the strength and rigidity show almost the same values as those of the above, the Dynstat impact value is remarkably inferior. In addition, the volume resistivity is high, and a high electromagnetic wave shielding effect cannot be expected.

Comparative Example 6 The molten resin was extruded using an extruder, and the fiber bundle was continuously impregnated with the fiber bundle by continuously feeding the fiber bundle into a crosshead die attached to the tip of the extruder, thereby reinforcing the fiber. The resin strand is drawn and formed. The strand is cut to obtain a long fiber pellet. The type of resin and fiber used, fiber length, and fiber content are as shown in Table 1.

After the obtained pellets were dried in vacuum at 100 ° C. for 5 hours or more, they were injection-molded by an injection molding machine at a cylinder temperature of 290 ° C. and a mold temperature of 80 ° C. As compared with Examples 1 to 8, the moldability was remarkably inferior, problems such as the molding material clogging the mold gate frequently occurred, and the productivity was extremely inferior. In addition, a molded article excellent in appearance could not be obtained.

[0042]

[Table 1] The notation of resin and fiber in Table 1 conforms to the following.

N6: Nylon 6 resin [Amilan CM1010 manufactured by Toray Industries, Inc.] N66: Nylon 66 resin [Amilan CM manufactured by Toray Industries, Inc.]
3007] N6 / 66: Nylon 6 resin (95%) and Nylon 66
Resin (5%) [Amilan CM manufactured by Toray Industries, Inc.
6011] N66 / 6: Nylon 66 resin (90%) and Nylon 6
Resin (10%) [Amilan C manufactured by Toray Industries, Inc.
M3301L] PC / ABS: Polycarbonate resin + ABS resin [Multilon T-1000 manufactured by Teijin Chemicals Ltd.] PC / ABS + E: Polycarbonate resin + ABS resin [Multilon T-1000 manufactured by Teijin Chemicals Ltd.] 90 wt
% And an elastomer [Hytrel manufactured by Toray Dupont Co., Ltd.] 10 wt% blended by melt extrusion CF1: Carbon fiber [Trayca T700S, ε manufactured by Toray Co., Ltd.
= 2.1%] CF2: carbon fiber [Toray Corp. trading card T300, ε =
1.5%] GF: Glass fiber [ER115 manufactured by NEC Corporation
0]

[0044]

The fiber-reinforced resin molded article of the present invention has both strength, rigidity and impact resistance, and can be obtained efficiently. Such a molded product is suitable for a wide range of industrial fields requiring strength, rigidity, and impact resistance, including housings and casings. Further, when reinforced with carbon fiber, in addition to strength, rigidity and impact resistance, it is also excellent in electromagnetic wave shielding effect by imparting conductivity, so it is particularly suitable for housings and casings of electronic devices, and the industrial effect is large.

Claims (9)

[Claims] 1. A fiber-reinforced resin molded product characterized in that the fiber contained in the fiber-reinforced resin molded product has a value of 7 or more and 600 or less in the following (Formula 1). (Formula 1) Σ (lwa × Wf) (where lwa is the weight average fiber length (mm) of the fiber contained in the fiber-reinforced resin molded product, Wf is the fiber content (% by weight), and Σ is the fiber When there are a plurality of types of fibers contained in the reinforced resin molded product, it means that the values in parentheses are totaled for each fiber.) 2. The value of the following (Formula 2) is 20 or more and 1000
The fiber-reinforced resin molded article according to claim 1, wherein the molded article is molded using the following molding material. (Formula 2) Σ (lwb × Wf) (where lwb is the weight average fiber length (mm) of the fibers contained in the molding material, Wf is the fiber content (% by weight), and Σ is the When there are a plurality of types of fibers contained, it means that the values in parentheses are totaled for each fiber.) 3. The fiber-reinforced thermoplastic resin molded article according to claim 1, which is obtained by injection molding a thermoplastic resin molding material. 4. The fiber-reinforced resin molded product according to claim 1, wherein the molded product has a thickness of 4 mm or less. 5. The fiber-reinforced resin molded product according to claim 1, wherein carbon fiber is contained in the fiber-reinforced resin molded product. 6. The fiber-reinforced resin molded article according to claim 1, wherein the carbon fiber according to claim 5 has a tensile elongation at break of at least 1.5% or more. 7. The fiber-reinforced resin molded article according to claim 1, wherein the molded article is used for parts for electronic and electric equipment. 8. The fiber-reinforced resin molded article according to claim 1, wherein the molded article has a flame retardancy of V-0 or more in UL standard at a thickness of 1/32 inch. 9. The fiber-reinforced thermoplastic resin molded article according to claim 1, wherein the matrix resin is a polyamide resin.