JP2018053091A - Resin composition, and resin molded body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin composition capable of obtaining a resin molded body excellent in bending elastic modulus.SOLUTION: A resin composition contains polyolefin, a carbon fiber, a resin containing at least one of an amide bond and an imide bond, where a content with respect to 100 pts.mass of the polyolefin is more than 20 pts.mass and 100 pts.mass or less, and a compatibilizer, where a part of the resin containing at least one of the amide bond and the imide bond forms a domain with a diameter of 0.1 μm or more and 10 μm or less in the polyolefin.SELECTED DRAWING: None

Description

  The present invention relates to a resin composition and a resin molded body.

Conventionally, various resin compositions have been provided and used for various applications.
In particular, a resin composition containing a polyolefin as a thermoplastic resin is used for home appliances, various parts of automobiles, casings, and the like, as well as parts of office equipment and electronic electrical equipment.

  For example, Patent Document 1 discloses that “(a) 0.1 to 90% by weight of at least one polyolefin, (b) 0.1 to 50% by weight of at least one polyamide, (c) 0.1 to 0.1% by weight,” 15% by weight of at least one modified polyolefin, (d) 5.0-75% by weight of at least one reinforcing fiber, (e) 0.1-10% by weight of at least one sulfur-containing additive. A long fiber reinforced polyolefin structure having a length of 3 mm or more is disclosed.

Patent Document 2 discloses that “it has an acid-modified polyolefin (A) block and a polyamide (B) block, carbon derived from an amide group by ¹³ C-NMR, carbon derived from a methyl group, a methylene group, and a methine group” Is a polyolefin resin modifier comprising a polymer (X) having a ratio (α) of 0.5 / 99.5 to 12/88 ”. Furthermore, Patent Document 2 discloses "Inorganic fiber-containing polyolefin resin composition comprising this polyolefin resin modifier (K), polyolefin resin (D) and inorganic fiber (E)." .

  Patent Document 3 states that “in a thermoplastic resin molded product containing carbon fibers, the carbon fiber contained in the molded product has a total content of 0.5 to 30 wt% and further exceeds 1.5 mm. A carbon fiber-containing thermoplastic resin molded article characterized in that the length of the carbon fiber is 0.1 to 4.7 wt%.

Japanese translation of PCT publication No. 2003-528956 JP 2014-181307 A JP 2000-071245 A

  An object of the present invention is to provide a resin composition containing a polyolefin, carbon fiber, a resin containing at least one of an amide bond and an imide bond, and a compatibilizing agent, wherein the content of the resin containing at least one of an amide bond and an imide bond is When the amount is 20 parts by mass or less with respect to 100 parts by mass of the polyolefin, or a part of the resin including at least one of an amide bond and an imide bond forms a domain having a diameter of less than 0.1 μm or more than 10 μm in the polyolefin. It is providing the resin composition from which the resin molding excellent in the bending elastic modulus is obtained compared with the case where it has.

  The above object is achieved by the present invention described below.

The invention according to claim 1
Polyolefins,
Carbon fiber,
A resin containing at least one of an amide bond and an imide bond, the content of which is greater than 20 parts by mass and equal to or less than 100 parts by mass with respect to 100 parts by mass of the polyolefin;
A compatibilizer,
Including
A resin composition in which a part of a resin including at least one of the amide bond and the imide bond forms a domain having a diameter of 0.1 μm or more and 10 μm or less in the polyolefin.

The invention according to claim 2
The resin composition according to claim 1, wherein a part of the resin containing at least one of the amide bond and the imide bond forms a coating layer around the carbon fiber.

The invention according to claim 3
The resin composition according to claim 2, wherein a layer of the compatibilizer is interposed between the coating layer and the polyolefin.

The invention according to claim 4
The resin composition according to any one of claims 1 to 3, wherein the resin including at least one of the amide bond and the imide bond is polyamide.

The invention according to claim 5
The resin composition according to any one of claims 1 to 4, wherein the compatibilizer is a modified polyolefin.

The invention according to claim 6
The resin composition according to any one of claims 1 to 5, wherein an average fiber length of the carbon fibers is 0.1 mm or more and 2.5 mm or less.

The invention according to claim 7 provides:
The resin composition according to any one of claims 1 to 6, wherein a content of the carbon fiber is 0.1 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the polyolefin.

The invention according to claim 8 provides:
The content of the compatibilizing agent is 1 part by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the resin including at least one of the amide bond and the imide bond. Resin composition.

The invention according to claim 9 is:
The content of the resin including at least one of the amide bond and the imide bond with respect to the mass of the carbon fiber is 0.1% by mass or more and 200% by mass or less. Resin composition.

The invention according to claim 10 is:
The resin composition according to any one of claims 1 to 9, wherein a content of the compatibilizing agent with respect to a mass of the carbon fiber is 1% by mass or more and 100% by mass or less.

The invention according to claim 11 is:
Polyolefins,
Carbon fiber,
A resin containing at least one of an amide bond and an imide bond, the content of which is greater than 20 parts by mass and equal to or less than 100 parts by mass with respect to 100 parts by mass of the polyolefin;
A compatibilizer,
Including
A resin molded body in which a part of a resin including at least one of the amide bond and the imide bond forms a domain having a diameter of 0.1 μm or more and 10 μm or less in the polyolefin.

The invention according to claim 12
The resin molded product according to claim 11, wherein a part of the resin including at least one of the amide bond and the imide bond forms a coating layer around the carbon fiber.

The invention according to claim 13 is:
The resin molded product according to claim 12, wherein a layer of the compatibilizing agent is interposed between the coating layer and the polyolefin.

The invention according to claim 14 is:
The resin molded body according to any one of claims 11 to 13, wherein the resin including at least one of the amide bond and the imide bond is polyamide.

The invention according to claim 15 is:
The resin molding according to any one of claims 11 to 14, wherein the compatibilizing agent is a modified polyolefin.

The invention according to claim 16 provides:
The resin molded body according to any one of claims 11 to 15, wherein an average fiber length of the carbon fibers is 0.1 mm or more and 2.5 mm or less.

The invention according to claim 17 provides:
The resin molded body according to any one of claims 11 to 16, wherein a content of the carbon fiber is 0.1 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the polyolefin.

The invention according to claim 18
The content of the compatibilizer is 1 part by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the resin including at least one of the amide bond and the imide bond. Resin molded body.

The invention according to claim 19 is
The content of a resin including at least one of the amide bond and the imide bond with respect to the mass of the carbon fiber is 0.1% by mass or more and 200% by mass or less. Resin molded body.

The invention according to claim 20 provides
The resin molded body according to any one of claims 11 to 19, wherein a content of the compatibilizing agent with respect to a mass of the carbon fiber is 1% by mass or more and 100% by mass or less.

According to the invention of claim 1, in a resin composition comprising a polyolefin, a carbon fiber, a resin containing at least one of an amide bond and an imide bond, and a compatibilizing agent, the resin containing at least one of an amide bond and an imide bond When the content of is 20 parts by mass or less with respect to 100 parts by mass of the polyolefin, or a part of the resin containing at least one of an amide bond and an imide bond has a diameter of less than 0.1 μm or more than 10 μm in the polyolefin Compared to the case of forming a resin composition, a resin composition is obtained from which a resin molded body having an excellent flexural modulus can be obtained.
According to the invention which concerns on Claim 2, compared with the case where the resin containing at least one of an amide bond and an imide bond has not formed the coating layer around the said carbon fiber, the resin molding which was excellent in the bending elastic modulus. The resulting resin composition is provided.
According to the invention which concerns on Claim 3, compared with the case where the layer of a compatibilizer is not interposed between a coating layer and polyolefin, the resin composition which can obtain the resin molding excellent in the bending elastic modulus is provided. Is done.
According to the invention which concerns on Claim 4, compared with the case where imidazole is used as resin containing at least one of an amide bond and an imide bond, the resin composition which can obtain the resin molding excellent in the bending elastic modulus is provided.
According to the invention which concerns on Claim 5, compared with the case where an epoxy copolymer is used as a compatibilizing agent, the resin composition from which the resin molding excellent in the bending elastic modulus is obtained is provided.
According to the invention of claim 6, in a resin composition comprising a polyolefin, a carbon fiber, a resin containing at least one of an amide bond and an imide bond, and a compatibilizing agent, the resin containing at least one of an amide bond and an imide bond Or a part of the resin containing at least one of an amide bond and an imide bond in a polyolefin having a diameter of less than 0.1 μm or more than 10 μm. Compared to the case of forming a resin, a resin composition is provided that includes a carbon fiber having an average fiber length of 0.1 mm to 2.5 mm and that has an excellent flexural modulus.

According to the invention of claim 7, the carbon fiber content is excellent in moldability and bending elastic modulus compared to the case where the content of carbon fiber is less than 0.1 parts by mass or more than 200 parts by mass with respect to 100 parts by mass of polyolefin. A resin composition from which a molded resin product can be obtained is provided.
According to the invention which concerns on Claim 8, compared with the case where content of a compatibilizing agent is less than 1 mass part or more than 100 mass parts with respect to 100 mass parts of resin containing at least one of an amide bond and an imide bond. There is provided a resin composition from which a resin molded article having an excellent elastic modulus can be obtained.
According to the invention of claim 9, the content of the resin containing at least one of an amide bond and an imide bond with respect to the mass of the carbon fiber is less than 0.1% by mass or more than 200% by mass compared to the case of bending. There is provided a resin composition from which a resin molded article having an excellent elastic modulus can be obtained.
According to the invention which concerns on Claim 10, compared with the case where content of a compatibilizer with respect to the mass of carbon fiber is less than 1 mass% or more than 100 mass%, the resin molding excellent in the bending elastic modulus is. The resulting resin composition is provided.

According to the eleventh aspect of the present invention, in a resin molded body containing a polyolefin, a carbon fiber, a resin containing at least one of an amide bond and an imide bond, and a compatibilizing agent, the resin containing at least one of an amide bond and an imide bond Or a part of the resin containing at least one of an amide bond and an imide bond in a polyolefin having a diameter of less than 0.1 μm or more than 10 μm. Compared with the case where the resin is formed, a resin molded body having an excellent flexural modulus is provided.
According to the invention which concerns on Claim 12, compared with the case where the resin containing at least one of an amide bond and an imide bond has not formed the coating layer around the said carbon fiber, the resin molding which was excellent in the bending elastic modulus. Provided.
According to the invention which concerns on Claim 13, compared with the case where the layer of a compatibilizer is not interposed between a coating layer and polyolefin, the resin molding excellent in the bending elastic modulus is provided.
According to the invention which concerns on Claim 14, compared with the case where imidazole is used as resin containing at least one of an amide bond and an imide bond, the resin molding excellent in the bending elastic modulus is provided.
According to the invention which concerns on Claim 15, compared with the case where an epoxy copolymer is used as a compatibilizing agent, the resin molding excellent in the bending elastic modulus is provided.
According to the invention of claim 16, in a resin molded body containing a polyolefin, carbon fiber, a resin containing at least one of an amide bond and an imide bond, and a compatibilizing agent, the resin containing at least one of an amide bond and an imide bond Or a part of the resin containing at least one of an amide bond and an imide bond in a polyolefin having a diameter of less than 0.1 μm or more than 10 μm. Compared to the case of forming a resin, a resin molded body containing carbon fibers having an average fiber length of 0.1 mm to 2.5 mm and having an excellent flexural modulus is provided.

According to the invention of claim 17, the carbon fiber content is excellent in moldability and bending elastic modulus compared to the case where the content of carbon fiber is less than 0.1 parts by mass or more than 200 parts by mass with respect to 100 parts by mass of polyolefin. A molded resin product is provided.
According to the invention of claim 18, the content of the compatibilizing agent is less than 1 part by mass or more than 100 parts by mass with respect to 100 parts by mass of the resin containing at least one of an amide bond and an imide bond. A resin molded body having an excellent elastic modulus is provided.
According to the invention of claim 19, the content of the resin containing at least one of an amide bond and an imide bond with respect to the mass of the carbon fiber is less than 0.1% by mass or more than 200% by mass compared to the case of bending. A resin molded body having an excellent elastic modulus is provided.
According to the invention which concerns on Claim 20, compared with the case where content of a compatibilizer with respect to the mass of carbon fiber is less than 1 mass% or more than 100 mass%, the resin molding excellent in the bending elastic modulus is provided. Is done.

It is a model figure which shows the principal part of the resin molding which concerns on this embodiment. It is a schematic diagram for demonstrating an example of the principal part of the resin molding which concerns on this embodiment. It is a schematic diagram of the test using a micro droplet method.

  Hereinafter, an embodiment as an example of the resin composition and the resin molded body of the present invention will be described.

[Resin composition]
The resin composition according to the present embodiment includes a polyolefin, a carbon fiber, a resin including at least one of an amide bond and an imide bond, and a compatibilizing agent. And content of resin containing at least one of an amide bond and an imide bond is more than 20 mass parts and 100 mass parts or less with respect to 100 mass parts of polyolefin. A part of the resin containing at least one of an amide bond and an imide bond forms a domain having a diameter of 0.1 μm or more and 10 μm or less in the polyolefin.
Hereinafter, a resin containing at least one of an amide bond and an imide bond may be referred to as a “specific resin”.

In recent years, in order to obtain a resin molded article excellent in mechanical strength, a resin composition containing polyolefin as a base material (matrix) and reinforcing fibers has been used.
In such a resin composition, when the affinity between the reinforcing fiber and the polyolefin is low, a space is generated at the interface between the two, and the adhesion at the interface may be lowered.
In particular, when carbon fiber is used as the reinforcing fiber in the resin composition, high mechanical strength is required compared to glass fiber, etc., but polarity that contributes to adhesion with polyolefin such as hydroxyl group and carboxyl group on the surface of carbon fiber Since there are few groups compared with glass fiber, the adhesiveness at the interface between carbon fiber and polyolefin is lowered. As a result, the mechanical strength, particularly the flexural modulus, is difficult to increase relative to the carbon fiber blending. In particular, when a load to bend repeatedly is applied, peeling at the interface between the carbon fiber and the polyolefin tends to proceed, so that the decrease in the flexural modulus from the beginning tends to increase.

Therefore, the resin composition according to the present embodiment includes four components: polyolefin, carbon fiber, a resin (specific resin) containing at least one of an amide bond and an imide bond, and a compatibilizing agent. In addition, the content of the specific resin with respect to 100 parts by mass of the polyolefin exceeds 20 parts by mass and is 100 parts by mass or less.
By setting it as this structure, the resin molding which is excellent in a bending elastic modulus is obtained. Although it is not clear about the operation | movement from which such an effect is acquired, it estimates as follows.

When a resin molded body is obtained from the resin composition according to the present embodiment, when the resin composition is hot melted and mixed, the polyolefin as the base material and the compatibilizing agent are melted, and one in the molecule of the compatibilizing agent. The amide bond or imide bond contained in the molecule of the specific resin and the amide bond are compatible with each other, and the specific resin is dispersed in the resin composition.
In this state, when the specific resin comes into contact with the carbon fiber, the amide bond or imide bond that is contained in large numbers along the molecular chain of the specific resin and the polar group slightly present on the surface of the carbon fiber have an affinity (attraction). And physical bonding at a plurality of locations by hydrogen bonding). Also, since polyolefin and specific resin are generally poorly compatible, the repulsive force between polyolefin and specific resin increases the frequency of contact between specific resin and carbon fiber. Increases the amount and area of adhesion. Thus, the coating layer by specific resin is formed around carbon fiber (refer FIG. 1). In FIG. 1, PP represents polyolefin, CF represents carbon fiber, and CL represents a coating layer.
The specific resin that forms the coating layer is also compatible with some reactive groups in the molecule of the compatibilizer by chemical reaction and electrostatic interaction between polar groups. By being compatible with polyolefin, the attractive force and repulsive force are in an equilibrium state, and the coating layer of the specific resin is formed in a thin and nearly uniform state. In particular, since the affinity between the carboxy group present on the surface of the carbon fiber and the amide bond or imide bond contained in the molecule of the specific resin is high, a coating layer of the specific resin is easily formed around the carbon fiber, and the thin film In addition, it is considered that the coating layer has excellent uniformity.

On the other hand, the amount of the compatibilizer relative to the amount of the specific resin is relatively large by including the specific resin having such an action in a range of more than 20 parts by mass and 100 parts by mass or less with respect to 100 parts by mass of the polyolefin. The specific resin becomes difficult to spread in the polyolefin, and the tendency to localize around the carbon fiber increases. Thereby, it is considered that the coating layer made of the specific resin is formed in a nearly uniform state while being thickened to some extent over the entire circumference of the carbon fiber.
In addition, although it is preferable that the coating layer has coat | covered the whole circumference | surroundings of carbon fiber, there may be a part which is not covered partially.

  Furthermore, a part of the specific resin forms a domain having a diameter in the above range in the polyolefin, that is, the specific resin that is free does not contribute to the formation of the coating layer and is finely dispersed in the polyolefin. And mechanical strength, especially a bending elastic modulus improves. This is because 1) the domain of the specific resin dispersed in the polyolefin plays a role of dispersing the mechanical load such as bending, and 2) the domain of the specific resin is fine and the stress on the interface between the domain of the specific resin and the polyolefin This is because concentration is thought to be eased.

  From the above, since the adhesion at the interface between the carbon fiber and the polyolefin is increased and the specific resin is finely dispersed in the polyolefin, a resin molded article having excellent mechanical strength, particularly bending elastic modulus can be obtained. It is guessed.

  Moreover, a part of specific resin forms the domain of the diameter of the said range in polyolefin, and a moldability also improves.

Here, when the fiber length of the carbon fiber is shortened, the resin reinforcing ability of the carbon fiber tends to decrease. In particular, due to recent demands for recycling, it has also been promoted to pulverize and reuse a resin molded body reinforced with carbon fiber, and the fiber length of the carbon fiber is often shortened when the resin molded body is pulverized. . Moreover, the fiber length of carbon fiber may become short at the time of the hot-melt kneading | mixing at the time of manufacturing a resin composition. For this reason, when a resin molded body is molded from a resin composition containing carbon fibers having a short fiber length, the mechanical strength, particularly the flexural modulus, tends to decrease.
However, even if a resin molded body containing carbon fibers is pulverized and a recycled product in which carbon fibers are shortened is used as a raw material, or carbon fibers are shortened during hot melt kneading, the resin composition according to the present embodiment The product is useful because a resin molded body having an excellent flexural modulus can be obtained.

  Here, the resin composition according to the present embodiment and the resin molded body obtained thereby are made of a specific resin around the carbon fiber by hot melt kneading and injection molding at the time of manufacturing the resin composition (for example, pellets). It is preferable that a coating layer is formed and the thickness of the coating layer is 50 nm or more and 700 nm or less.

  In the resin composition according to the present embodiment, the thickness of the coating layer made of the specific resin is 50 nm or more and 700 nm or less, and is preferably 50 nm or more and 650 nm or less from the viewpoint of further improving the flexural modulus. When the thickness of the coating layer is 50 nm or more, the flexural modulus is improved, and when the thickness of the coating layer is 700 nm or less, the interface between the carbon fiber and the polyolefin via the coating layer is prevented from becoming brittle, and the flexural modulus is increased. Is suppressed.

The thickness of the coating layer is a value measured by the following method. The measurement object is broken in liquid nitrogen, and the cross section is observed using an electron microscope (VE-9800 manufactured by Keyence). In the cross section, 100 thicknesses of the coating layer covering the carbon fiber are measured and calculated as an average value.
In addition, confirmation of a coating layer is implemented by the said cross-sectional observation.

  In the resin composition according to the present embodiment and the resin molded body obtained thereby, the domain diameter of the specific resin in the polyolefin is 0.1 μm or more and 10 μm or less, but from the viewpoint of further improving the flexural modulus. The thickness is preferably 0.5 μm or more and 5 μm or less.

  The diameter of the domain of the specific resin in the polyolefin is, for example, 1) increase / decrease of compatibilizer content, 2) adjustment of hot melt kneading temperature and molding temperature, 3) hot melt kneading, mixing force or dispersion during molding It is adjusted by force.

The diameter of the domain of the specific resin is a value measured by the following method.
That is, a sample piece of a measurement object is embedded in an epoxy resin, and a precision polished cross section is prepared with an automatic polishing machine (Vector made by BUEHLER).
Next, using a SEM (Hitachi S-3400N, acceleration voltage 15 KV), a sample cross section of the sample cross section was photographed at three magnifications at a random magnification of 1500, and carbon of a specific resin was used using image analysis software (ImageProPlus). The luminance range is set so as to extract all the fiber coating layer components and free components (corresponding to the domain of the specific resin).
Then, the coating layer components are manually selected and excluded, and the diameter and number of objects are selected and calculated using only free components (corresponding to specific resin domains) as measurement items, and the size of each domain (diameter = equivalent circle diameter). ) And the number, and an average value of the size (diameter) of the domain is obtained from this.

In addition, in the resin composition (and its resin molding) which concerns on this embodiment, the compatibilizing agent partly compatibilizes between this coating layer and polyolefin, for example.
Specifically, for example, a compatibilizing agent layer is preferably interposed between the coating layer of the specific resin and the polyolefin as the base material (see FIG. 2). That is, it is preferable that a compatibilizing agent layer is formed on the surface of the covering layer, and the covering layer and the polyolefin are adjacent to each other through the compatibilizing agent layer. The compatibilizing agent layer is formed thinner than the coating layer, but the adhesion (adhesiveness) between the covering layer and the polyolefin is enhanced by the presence of the compatibilizing agent layer, and the mechanical strength, especially the flexural modulus, is excellent. It becomes easy to obtain a resin molded body. In FIG. 2, PP represents polyolefin, CF represents carbon fiber, CL represents a coating layer, and CA represents a compatibilizer layer.

In particular, the layer of the compatibilizer is bonded to the coating layer (hydrogen bonding, covalent bonding by reaction of a functional group of the compatibilizer and a specific resin, etc.) and is compatible with the polyolefin, and the coating layer and the polyolefin It is good to intervene between. This configuration is, for example, as a compatibilizing agent, a phase having the same structure as the polyolefin as the base material or a structure compatible with the base material, and including a site that reacts with the functional group of the specific resin described above in part of the molecule. It is easy to realize when a solubilizer is applied.
Specifically, for example, when a polyolefin, a polyamide as a specific resin, and a maleic anhydride modified polyolefin as a compatibilizer are applied, the maleic anhydride modified polyolefin layer (the compatibilizer layer) has its maleic anhydride moiety. It is preferable that the carboxy group formed by ring-opening reacts with the amine residue of the polyamide layer (coating layer) to be bonded and the polyolefin part is present in a state compatible with the polyolefin.

Here, a method for confirming that the compatibilizing agent layer is interposed between the coating layer and the polyolefin is as follows.
An infrared spectroscopic analyzer (NICOLET6700FT-IR manufactured by Thermo Fisher) is used as the analyzer. For example, in the case of a resin composition (or resin molded product) of polypropylene (hereinafter referred to as PP) as polyolefin, PA66 as polyamide and maleic acid-modified polypropylene (hereinafter referred to as MA-PP) as modified polyolefin, a mixture thereof, a mixture of PP and PA66 , IR spectra of PP and MA-PP mixtures, PP alone, PA66 alone and MA-PP alone as a reference, were obtained by the KBr tablet method, and were derived from acid anhydride in the mixture (a peak characteristic of MA-PP). comparative analysis of the peak area of the wave number 1820 cm ^-1 or 1750 cm ^-1 or less. In a mixture of PP, PA66, and MA-PP, a decrease in the acid anhydride peak area is confirmed, and it is confirmed that MA-PP and PA66 are reacting. Thereby, it can confirm that the layer (bonding layer) of a compatibilizer exists between the coating layer and polyolefin. Specifically, when MA-PP and PA66 are reacted, the cyclic maleated portion of MA-PP is opened, and the amine residue of PA66 is chemically bonded to reduce the cyclic maleated portion. It can be confirmed that a compatibilizing agent layer (bonding layer) is interposed between the polyolefin and the polyolefin.

  Hereinafter, the detail of each component of the resin composition which concerns on this embodiment is demonstrated.

-Polyolefin (A)-
Polyolefin is a base material of a resin composition, and is a resin component reinforced by carbon fibers (also called a matrix resin).
Polyolefin may be used individually by 1 type and may use 2 or more types together.

The polyolefin is a resin containing a repeating unit derived from an olefin, and may contain a repeating unit derived from a monomer other than the olefin as long as it is 30% by mass or less based on the whole resin.
Polyolefin is obtained by addition polymerization of olefin (a monomer other than olefin, if necessary).
Moreover, 1 type may be sufficient as the monomer other than an olefin and olefin for obtaining polyolefin, respectively, and 2 or more types may be sufficient as it.
The polyolefin may be a copolymer or a homopolymer. The polyolefin may be linear or branched.

Here, examples of the olefin include linear or branched aliphatic olefins and alicyclic olefins.
Examples of the aliphatic olefin include α-olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-hexadecene and 1-octadecene.
Examples of the alicyclic olefin include cyclopentene, cycloheptene, norbornene, 5-methyl-2-norbornene, tetracyclododecene, vinylcyclohexane and the like.
Among these, from the viewpoint of cost, α-olefin is preferable, ethylene and propylene are more preferable, and propylene is particularly preferable.

The monomer other than olefin is selected from known addition polymerizable compounds.
Examples of the addition polymerizable compound include styrenes such as styrene, methylstyrene, α-methylstyrene, β-methylstyrene, t-butylstyrene, chlorostyrene, chloromethylstyrene, methoxystyrene, styrenesulfonic acid or a salt thereof; (Meth) acrylic acid esters such as alkyl (meth) acrylate, benzyl (meth) acrylate and dimethylaminoethyl (meth) acrylate; halovinyls such as vinyl chloride; vinyl esters such as vinyl acetate and vinyl propionate; Vinyl ethers such as vinyl methyl ether; vinylidene halides such as vinylidene chloride; N-vinyl compounds such as N-vinylpyrrolidone; and the like.

Suitable polyolefins include polypropylene (PP), polyethylene (PE), polybutene, polyisobutylene, coumarone / indene resin, terpene resin, ethylene / vinyl acetate copolymer resin (EVA), and the like.
Especially, it is preferable that it is resin containing only the repeating unit derived from an olefin, and a polypropylene is especially preferable from the point of cost.

The molecular weight of the polyolefin is not particularly limited, and may be determined according to the type of resin, molding conditions, resin molding, and the like. For example, the weight average molecular weight (Mw) of the polyolefin is preferably in the range of 10,000 to 300,000, and more preferably in the range of 10,000 to 200,000.
Further, the glass transition temperature (Tg) or melting point (Tm) of the polyolefin is not particularly limited as in the case of the molecular weight described above, and may be determined according to the type of resin, molding conditions, use of the resin molding, and the like. For example, the melting point (Tm) of polyolefin is preferably in the range of 100 ° C. or higher and 300 ° C. or lower, and more preferably in the range of 150 ° C. or higher and 250 ° C. or lower.

In addition, the weight average molecular weight (Mw) and melting | fusing point (Tm) of polyolefin show the value measured as follows.
That is, the weight average molecular weight (Mw) of the polyolefin is measured by gel permeation chromatography (GPC) under the following conditions. A high temperature GPC system “HLC-8321GPC / HT” is used as the GPC apparatus, and o-dichlorobenzene is used as the eluent. The polyolefin is once melted and filtered into o-dichlorobenzene at a high temperature (temperature of 140 ° C. to 150 ° C.), and the filtrate is used as a measurement sample. The measurement conditions were a sample concentration of 0.5% and a flow rate of 0.6 ml / min. Sample injection volume 10 μl, using RI detector. The calibration curve is “polystylen standard sample TSK standard” manufactured by Tosoh Corporation: “A-500”, “F-1”, “F-10”, “F-80”, “F-380”, “A-”. It is created from 10 samples of “2,500”, “F-4”, “F-40”, “F-128”, and “F-700”.
In addition, the melting point (Tm) of the polyolefin is calculated from the DSC curve obtained by differential scanning calorimetry (DSC) according to the “melting peak” described in the method for determining the melting temperature in JIS K 7121-1987 “Method for measuring plastic transition temperature”. Calculated by “temperature”.

  The content of the polyolefin may be determined according to the use of the resin molded body, but is preferably 5% by mass or more and 95% by mass or less, and preferably 10% by mass or more and 95% by mass with respect to the total mass of the resin composition. More preferably, it is 20% by mass or more and 95% by mass or less.

-Carbon fiber-
Known carbon fibers are used as the carbon fibers, and both PAN-based carbon fibers and pitch-based carbon fibers are used.

The carbon fiber may be subjected to a known surface treatment.
Examples of the surface treatment of the carbon fiber include an oxidation treatment and a sizing treatment.
The form of the carbon fiber is not particularly limited, and may be selected according to the use of the resin molded body. Examples of the form of the carbon fiber include a fiber bundle composed of a large number of single fibers, a bundle of fiber bundles, a woven fabric in which fibers are woven in two dimensions or three dimensions, and the like.

The fiber diameter, fiber length, and the like of the carbon fiber are not particularly limited, and may be selected according to the use of the resin molded body.
However, even if the fiber length of the carbon fiber is short, a resin molded body having an excellent flexural modulus can be obtained. Therefore, the average fiber length of the carbon fiber is from 0.1 mm to 2.5 mm (preferably from 0.2 mm to 2 mm). 0.0 mm or less).
Further, the average diameter of the carbon fibers may be, for example, 5.0 μm or more and 10.0 μm or less (preferably 6.0 μm or more and 8.0 μm or less).

Here, the measuring method of the average fiber length of carbon fibers is as follows. The carbon fiber is observed with an optical microscope at a magnification of 100, and the length of the carbon fiber is measured. And this measurement is performed about 200 carbon fibers, and let the average value be the average fiber length of carbon fibers.
On the other hand, the measuring method of the average diameter of carbon fiber is as follows. A cross section perpendicular to the length direction of the carbon fiber is observed with a SEM (scanning electron microscope) at a magnification of 1000 times, and the diameter of the carbon fiber is measured. And this measurement is performed about 100 carbon fibers, and let the average value be an average diameter of carbon fiber.

Commercially available products may be used as the carbon fiber.
Commercially available PAN-based carbon fibers include “Torayca (registered trademark)” manufactured by Toray Industries, Inc., “Tenax” manufactured by Toho Tenax Co., Ltd., and “Pyrofil (registered trademark)” manufactured by Mitsubishi Rayon Co., Ltd. Is mentioned. In addition, examples of commercially available PAN-based carbon fibers include commercially available products manufactured by Hexcel, Cytec, Dow-Aksa, Taiwan Plastic, and SGL.
Examples of commercially available pitch-based carbon fibers include “Dialyad (registered trademark)” manufactured by Mitsubishi Rayon Co., Ltd., “GRANOC” manufactured by Nippon Graphite Fiber Co., Ltd., and “Kureka” manufactured by Kureha Co., Ltd. . In addition, examples of commercially available pitch-based carbon fibers include those manufactured by Osaka Gas Chemical Co., Ltd. and those manufactured by Cytec.

  In addition, carbon fiber may be used individually by 1 type, and may use 2 or more types together.

The content of the carbon fiber is preferably 0.1 parts by mass or more and 200 parts by mass or less, more preferably 1 part by mass or more and 180 parts by mass or less, with respect to 100 parts by mass of polyolefin as a base material, and 5 parts by mass. More preferably, it is 150 parts by mass or less.
The carbon fiber is contained in an amount of 0.1 parts by mass or more with respect to 100 parts by mass of the polyolefin, whereby the resin composition is reinforced, and the carbon fiber content is set to 200 parts by mass or less with respect to 100 parts by mass of the polyolefin. Thereby, the moldability at the time of obtaining a resin molding becomes favorable.
In addition, when using reinforced fiber other than carbon fiber, it is preferable to make 80 mass% or more into carbon fiber with respect to the total mass of a reinforced fiber.

Hereafter, the content (parts by mass) with respect to 100 parts by mass of the polyolefin may be abbreviated as “phr (per hundred resin)”.
When this abbreviation is used, the carbon fiber content is 0.1 phr or more and 200 phr or less.

-Resin (specific resin) containing at least one of imide bond and amide bond-
The specific resin is a resin including a specific partial structure and capable of covering the periphery of the carbon fiber as described above.
This specific resin will be described in detail.

The specific resin is preferably a resin having low compatibility with the polyolefin, specifically, a resin having a solubility parameter (SP value) different from that of the polyolefin.
Here, the difference in SP value between the polyolefin and the specific resin is preferably 3 or more, and more preferably 3 or more and 6 or less, from the viewpoint of compatibility between them and repulsion between the two.
The SP value here is a value calculated by Fedor's method. Specifically, the solubility parameter (SP value) is, for example, Polym. Eng. Sci. , Vol. 14, p. 147 (1974), the SP value is calculated by the following formula.
Formula: SP value = √ (Ev / v) = √ (ΣΔei / ΣΔvi)
(Where Ev: evaporation energy (cal / mol), v: molar volume (cm ³ / mol), Δei: evaporation energy of each atom or atomic group, Δvi: molar volume of each atom or atomic group)
The solubility parameter (SP value) employs (cal / cm ³ ) ^1/2 as a unit, but the unit is omitted in accordance with common practice and expressed in a dimensionless manner.

Further, the specific resin contains at least one of an imide bond and an amide bond in the molecule.
By including an imide bond or an amide bond, affinity is expressed with a polar group present on the surface of the carbon fiber.
Specific types of specific resins include thermoplastic resins containing at least one of an imide bond and an amide bond in the main chain. Specifically, polyamide (PA), polyimide (PI), and polyamideimide (PAI) , Polyetherimide (PEI), polyamino acid and the like.

As the specific resin, since it is preferable that the compatibility with polyolefin is low and the SP value is different, it is preferable to use a different kind of thermoplastic resin from polyolefin.
Among these, polyamide (PA) is preferable from the viewpoint of further improving the flexural modulus and excellent adhesion to carbon fibers.

Here, the adhesion between the specific resin and the carbon fiber is evaluated by, for example, an index such as interfacial shear strength.
Interfacial shear strength is measured using the microdroplet method. Here, the microdroplet method will be described with reference to the schematic diagram of the test shown in FIG.
The microdroplet method applies a liquid resin to a single fiber f, attaches a droplet D (also referred to as a resin grain or resin ball), fixes the droplet D, and then pulls out the single fiber f in the direction of the arrow. This is a method for evaluating the interfacial adhesion between the two.
Based on this test, the interfacial shear strength (τ) is calculated using the following formula.

In the formula, τ represents the interfacial shear strength, F represents the pulling load, d represents the fiber diameter of the single fiber, and L represents the droplet length.
The larger the value of the calculated interfacial shear strength (τ), the higher the adhesion between the carbon fiber and the specific resin, and by selecting a combination of the carbon fiber and the specific resin having a large value, higher bending It is also an indicator that a resin molded body having an elastic modulus is formed.

Examples of the polyamide include those obtained by co-condensation polymerization of dicarboxylic acid and diamine, and those obtained by ring-opening polycondensation of lactam.
Dicarboxylic acids include oxalic acid, adipic acid, suberic acid, sebacic acid, terephthalic acid, isophthalic acid, 1,4-cyclohexanedicarboxylic acid, malonic acid, succinic acid, glutaric acid, pimelic acid, azelaic acid, phthalic acid, etc. Among them, adipic acid and terephthalic acid are preferable.
Examples of the diamine include ethylene diamine, pentamethylene diamine, hexamethylene diamine, nonane diamine, decamethylene diamine, 1,4-cyclohexane diamine, p-phenylene diamine, m-phenylene diamine, m-xylene diamine, and the like. Diamine is preferred.
Examples of the lactam include ε-caprolactam, undecane lactam, lauryl lactam, etc. Among them, ε-caprolactam is preferable.

  As the polyamide, polyamide (PA6) obtained by ring-opening polycondensation of ε-caprolactam, 6.6 nylon, 6.10 nylon from the viewpoint of affinity (adhesiveness) with carbon fiber and moldability of the resin molding. 1 to 12 nylon, MXD, HT-1m, 6-T nylon, polyaminotriazole, polybenzimidazole, polyoxadiazole, polyamideimide, piperazine-based polyimide known as aromatic nylon, .6 nylon is preferred.

The molecular weight of the specific resin is not particularly limited as long as it is easier to melt by heat than the polyolefin coexisting in the resin composition. For example, if the specific resin is polyamide, the weight average molecular weight is preferably in the range of 10,000 to 300,000, and more preferably in the range of 10,000 to 100,000.
Further, the glass transition temperature or melting temperature (melting point) of the specific resin is not particularly limited as in the case of the molecular weight, and it is sufficient that the specific resin is more easily melted by heat than the polyolefin coexisting in the resin composition. For example, when the specific resin is polyamide, the melting point (Tm) is preferably in the range of 100 ° C. or higher and 400 ° C. or lower, and more preferably in the range of 150 ° C. or higher and 350 ° C. or lower.

  The content of the specific resin is more than 20 parts by mass and 100 parts by mass or less with respect to 100 parts by mass of the polyolefin. From the viewpoint of improving the flexural modulus, it is preferably 30 parts by mass or more and 90 parts by mass or less, and 40 parts by mass. More preferably, it is 80 mass parts or less.

As content of specific resin with respect to the mass of carbon fiber, it is preferable that it is 0.1 mass% or more and 200 mass% or less from a viewpoint of an improvement of a bending elastic modulus, and it is 10 mass% or more and 150 mass% or less. More preferably, it is more preferably 12% by mass or more and 120% by mass or less.
When the content of the specific resin with respect to the mass of the carbon fiber is 0.1% by mass or more, the affinity between the carbon fiber and the specific resin is easily increased, and when the content is 200% by mass or less, the resin fluidity is improved.

-Compatibilizer-
The compatibilizing agent is a resin that increases the affinity between the polyolefin and the specific resin.
What is necessary is just to determine as a compatibilizing agent according to polyolefin.
The compatibilizer has the same structure as the polyolefin or a compatible structure, and a part of the molecule includes a part that has affinity with the specific resin described above or a part that reacts with a functional group of the specific resin. Is preferred.

Specifically, it is preferable to use a modified polyolefin as a compatibilizing agent.
Here, if the polyolefin is polypropylene (PP), the modified polyolefin (PP) is preferable as the modified polyolefin. Similarly, if the polyolefin is ethylene / vinyl acetate copolymer resin (EVA), the modified polyolefin is modified ethylene / acetic acid. Vinyl copolymer resin (EVA) is preferred.

Examples of the modified polyolefin include polyolefins into which modified sites including a carboxy group, a carboxylic acid anhydride residue, a carboxylic acid ester residue, an imino group, an amino group, an epoxy group, and the like are introduced.
The modification site introduced into the polyolefin preferably contains a carboxylic acid anhydride residue from the viewpoint of further improving the affinity between the polyolefin and the specific resin and the maximum temperature during the molding process. It preferably contains a maleic acid residue.

The modified polyolefin is a method in which a compound containing the above-mentioned modification site is reacted directly with the polyolefin and chemically bonded, or a method in which a graft chain is formed using the compound containing the above-mentioned modification site and this graft chain is bonded to the polyolefin, etc. There is.
Examples of the compound containing the above-mentioned modification site include maleic anhydride, fumaric anhydride, citric anhydride, N-phenylmaleimide, N-cyclohexylmaleimide, glycidyl (meth) acrylate, glycidyl vinyl benzoate, N- [4- (2, 3-epoxypropoxy) -3,5-dimethylbenzyl] acrylamide, alkyl (meth) acrylate, and derivatives thereof.
Among these, modified polyolefins obtained by reacting maleic anhydride, which is an unsaturated carboxylic acid, with polyolefins are preferred.

  Specific examples of the modified polyolefin include maleic anhydride modified polypropylene, maleic anhydride modified polyethylene, maleic anhydride modified ethylene / vinyl acetate copolymer resin (EVA), and adducts or copolymers thereof. .

A commercially available product may be used as the modified polyolefin.
Examples of the modified propylene include Yumex (registered trademark) series (100TS, 110TS, 1001, 1010) manufactured by Sanyo Chemical Industries, Ltd.
Examples of the modified polyethylene include Yumex (registered trademark) series (2000) manufactured by Sanyo Chemical Industries, Ltd., and Modic (registered trademark) series manufactured by Mitsubishi Chemical Corporation.
Examples of the modified ethylene / vinyl acetate copolymer resin (EVA) include the Modic (registered trademark) series of Mitsubishi Chemical Corporation.

  The molecular weight of the compatibilizer is not particularly limited, but is preferably in the range of 50,000 to 100,000, and more preferably in the range of 50,000 to 80,000 from the viewpoint of workability.

The content of the compatibilizer is preferably 1 part by mass or more and 50 parts by mass or less, more preferably 2 parts by mass or more and 40 parts by mass or less, and more preferably 5 parts by mass or more and 30 parts by mass with respect to 100 parts by mass of the polyolefin. More preferably, it is as follows.
The content of the compatibilizing agent is preferably 1 part by mass or more and 100 parts by mass or less, more preferably 5 parts by mass or more and 70 parts by mass or less with respect to 100 parts by mass of the specific resin, and 10 parts by mass or more and 50 parts by mass or less. More preferably, it is at most parts.
When the content of the compatibilizer is in the above range, the affinity between the polyolefin and the specific resin is increased, and the flexural modulus is improved.

The content of the compatibilizer with respect to the mass of the carbon fiber is preferably 1% by mass to 100% by mass, more preferably 5% by mass to 70% by mass, and more preferably 10% by mass to 50% by mass. More preferably, it is as follows.
When the content of the compatibilizer with respect to the mass of the carbon fiber is 1% by mass or more, the affinity between the carbon fiber and the specific resin is easily obtained. When the amount is 100% by mass or less, remaining of unreacted functional groups that cause discoloration or deterioration is suppressed.

-Other ingredients-
The resin composition according to the present embodiment may include other components in addition to the components described above.
Other components include, for example, flame retardants, flame retardant aids, anti-dripping agents when heated, plasticizers, antioxidants, mold release agents, light proofing agents, weathering agents, colorants, pigments, Modifier, antistatic agent, hydrolysis inhibitor, filler, reinforcing agent other than carbon fiber (talc, clay, mica, glass flake, milled glass, glass beads, crystalline silica, alumina, silicon nitride, aluminum nitride, Well-known additives such as boron nitride).
The other component is, for example, preferably from 0 to 10 parts by weight, more preferably from 0 to 5 parts by weight, based on 100 parts by weight of the polyolefin. Here, “0 part by mass” means a form that does not contain other components.

(Production method of resin composition)
The resin composition according to this embodiment is produced by melting and kneading the above components.
Here, a known means is used as the melt kneading means, and examples thereof include a twin screw extruder, a Henschel mixer, a Banbury mixer, a single screw extruder, a multi-screw extruder, and a kneader.
What is necessary is just to determine as temperature (cylinder temperature) in the case of melt-kneading according to the melting | fusing point etc. of the resin component which comprises a resin composition.

  In particular, the resin composition according to the present embodiment is preferably obtained by a production method including a step of melt-kneading polyolefin, carbon fiber, a specific resin, and a compatibilizing agent. When a polyolefin, carbon fiber, a specific resin, and a compatibilizing agent are melted and kneaded together, a coating layer of the specific resin is formed around the carbon fiber in a thin and nearly uniform state. The domain of the specific resin is easily finely dispersed, and the flexural modulus is increased.

[Resin molding]
The resin molded body according to the present embodiment includes a polyolefin, a carbon fiber, a resin (specific resin) including at least one of an amide bond and an imide bond, and a compatibilizing agent. And content of resin containing at least one of an amide bond and an imide bond is more than 20 mass parts and 100 mass parts or less with respect to 100 mass parts of polyolefin. Moreover, a part of specific resin forms the domain of the diameter of 0.1 micrometer or more and 10 micrometers or less in polyolefin. That is, the resin molded body according to the present embodiment is configured with the same composition as the resin composition according to the present embodiment.

The resin molded body according to the present embodiment may be obtained by preparing the resin composition according to the present embodiment and molding the resin composition, or components other than carbon fibers. And a composition obtained by mixing the composition and carbon fiber at the time of molding.
As the molding method, for example, injection molding, extrusion molding, blow molding, hot press molding, calendar molding, coating molding, cast molding, dipping molding, vacuum molding, transfer molding, or the like may be applied.

The molding method of the resin molded body according to the present embodiment is preferably injection molding because it has a high degree of freedom in shape.
The cylinder temperature of injection molding is, for example, 180 ° C. or higher and 300 ° C. or lower, and preferably 200 ° C. or higher and 280 ° C. or lower. The mold temperature for injection molding is, for example, 30 ° C. or more and 100 ° C. or less, and more preferably 30 ° C. or more and 60 ° C. or less.
The injection molding may be performed using a commercially available apparatus such as NEX150 manufactured by Nissei Resin Industry, NEX300 manufactured by Nissei Resin Industry, SE50D manufactured by Sumitomo Machinery.

The resin molded body according to the present embodiment is suitably used for applications such as electronic / electrical equipment, office equipment, home appliances, automobile interior materials, and containers. More specifically, casings for electronic / electrical equipment and home appliances; various parts of electronic / electrical equipment and home appliances; interior parts for automobiles; storage cases such as CD-ROM and DVD; tableware; beverage bottles; Wrap material; film; sheet;
In particular, since the resin molded body according to the present embodiment uses a carbon fiber as a reinforcing fiber, the resin molded body has a higher mechanical strength, and thus is suitable for an alternative use for a metal part.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

[Examples 1 to 12, Comparative Examples 1 to 13]
Ingredients according to Tables 1 and 2 (numerical values in the table indicate the number of parts) in a biaxial kneader (Toshiba Machine, TEM58SS), the following kneading conditions, and melt kneading shown in Tables 1 and 2 The mixture was kneaded at a temperature (cylinder temperature) to obtain pellets of a resin composition. In addition, the obtained pellet was baked at 600 degreeC for 2 hours, and the average fiber length of the carbon fiber which remained was measured by the above-mentioned method. The measurement results are shown in Tables 1 and 2.

-Kneading conditions-
・ Screw diameter: φ58mm
・ Rotation speed: 300rpm
・ Discharge nozzle diameter: 1mm

  The obtained pellets were subjected to an ISO multipurpose dumbbell test piece (ISO527 tensile) at an injection molding temperature (cylinder temperature) and a mold temperature of 50 ° C. shown in Tables 1 and 2 using an injection molding machine (NEX150, manufactured by Nissei Plastic Industries). Test, corresponding to ISO178 bending test) (test part thickness 4 mm, width 10 mm) and D2 test piece (length 60 mm, width 60 mm, thickness 2 mm) were molded.

[Evaluation]
The following evaluation was performed using the obtained two kinds of test pieces. The evaluation results are shown in Tables 1 and 2.

-Tensile modulus, elongation-
About the obtained ISO multipurpose dumbbell test piece, it measured about the tensile elasticity modulus and elongation by the method based on ISO527 using the evaluation apparatus (The Shimadzu Corporation make, a universal universal testing machine autograph AG-IS 5kN).

-Flexural modulus-
About the obtained ISO multipurpose dumbbell test piece, the bending elastic modulus was measured by the method based on ISO178 using the universal testing apparatus (Shimadzu Corp. make, autograph AG-Xplus).

-Deflection temperature under load (HDT)-
About the obtained ISO multipurpose dumbbell test piece, using a HDT measuring device (HDT-3, manufactured by Toyo Seiki Co., Ltd.), a deflection temperature under a load of 1.8 MPa (° C.) in a method based on the ISO178 bending test. Was measured.

-Dimensional change rate-
The obtained D2 test piece was allowed to stand for 24 hours under conditions of 28 ° C. and 31% RH, and the dimensional change rate (%) of the test piece before and after being left was measured for each of the TD direction and the MD direction of the test piece. .
In addition, the dimensional change was measured with the micro length measuring apparatus (the Olympus make, STM6-LM).

-Presence or absence of coating layer-
Using the obtained D2 test piece, the presence or absence of a coating layer of a specific resin was confirmed according to the method described above.

-Measurement of domain diameter of specific resin-
Using the obtained D2 test piece, the domain diameter of the specific resin in the thermoplastic resin was measured according to the method described above.

The details of the material types in Tables 1 and 2 are as follows.
-Thermoplastic resin-
-Polypropylene (Novatec (registered trademark) PP MA3, manufactured by Nippon Polypro Co., Ltd.), SP value: 9.3
-Reinforcing fiber-
Carbon fiber (with surface treatment, chopped carbon fiber trading card (registered trademark), manufactured by Toray Industries, Inc., average fiber length 20 mm, average diameter 7 μm)
-Specific resin-
Polyamide PA6 (PA6, Zytel (registered trademark) 7331J, manufactured by Dupont), SP value: 13.6
Polyamide PA66 (PA66, 101L, manufactured by Dupont), SP value: 11.6
Polyamide PA1010 (PA1010, Hiprolon 200, manufactured by Arkema)
・ Polyamide MXD6 (MXD6, manufactured by Mitsubishi Gas Chemical Company)
・ Polyamide PA9T (Nylon 9T, GENESTAR PA9T, Kuraray)
-Compatibilizer-
-Maleic anhydride modified polypropylene (Yumex (registered trademark) 110TS, manufactured by Sanyo Chemical Industries, Ltd.)-Maleic anhydride modified polyethylene (Modic M142, manufactured by Mitsubishi Chemical Corporation)
Maleic anhydride modified EVA: Maleic anhydride modified ethylene / vinyl acetate copolymer resin (Modic A543, manufactured by Mitsubishi Chemical Corporation)

  From the above results, it can be seen that in this example, a molded article having an excellent bending elastic modulus can be obtained even when the fiber length of the carbon fiber is shorter than in the comparative example.

  In addition, when the molded object produced in each Example was analyzed by the above-mentioned method, the layer of the used compatibilizer (maleic anhydride modified polypropylene layer) was interposed between the coating layer and the polyolefin. It was confirmed that a compatibilizer layer was formed on the surface of the coating layer.

Claims (20)

Polyolefins,
Carbon fiber,
A resin containing at least one of an amide bond and an imide bond, the content of which is greater than 20 parts by mass and equal to or less than 100 parts by mass with respect to 100 parts by mass of the polyolefin;
A compatibilizer,
Including
A resin composition in which a part of a resin including at least one of the amide bond and the imide bond forms a domain having a diameter of 0.1 μm or more and 10 μm or less in the polyolefin.   The resin composition according to claim 1, wherein a part of the resin containing at least one of the amide bond and the imide bond forms a coating layer around the carbon fiber.   The resin composition according to claim 2, wherein a layer of the compatibilizer is interposed between the coating layer and the polyolefin.   The resin composition according to any one of claims 1 to 3, wherein the resin containing at least one of the amide bond and the imide bond is polyamide.   The resin composition according to any one of claims 1 to 4, wherein the compatibilizer is a modified polyolefin.   The resin composition according to any one of claims 1 to 5, wherein an average fiber length of the carbon fibers is 0.1 mm or more and 2.5 mm or less.   The resin composition according to any one of claims 1 to 6, wherein a content of the carbon fiber is 0.1 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the polyolefin.   The content of the compatibilizing agent is 1 part by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the resin including at least one of the amide bond and the imide bond. Resin composition.   The content of the resin including at least one of the amide bond and the imide bond with respect to the mass of the carbon fiber is 0.1% by mass or more and 200% by mass or less. Resin composition.   The resin composition according to any one of claims 1 to 9, wherein a content of the compatibilizing agent with respect to a mass of the carbon fiber is 1% by mass or more and 100% by mass or less. Polyolefins,
Carbon fiber,
A resin containing at least one of an amide bond and an imide bond, the content of which is greater than 20 parts by mass and equal to or less than 100 parts by mass with respect to 100 parts by mass of the polyolefin;
A compatibilizer,
Including
A resin molded body in which a part of a resin including at least one of the amide bond and the imide bond forms a domain having a diameter of 0.1 μm or more and 10 μm or less in the polyolefin.   The resin molded product according to claim 11, wherein a part of the resin including at least one of the amide bond and the imide bond forms a coating layer around the carbon fiber.   The resin molded product according to claim 12, wherein a layer of the compatibilizing agent is interposed between the coating layer and the polyolefin.   The resin molded body according to any one of claims 11 to 13, wherein the resin including at least one of the amide bond and the imide bond is polyamide.   The resin molding according to any one of claims 11 to 14, wherein the compatibilizing agent is a modified polyolefin.   The resin molded body according to any one of claims 11 to 15, wherein an average fiber length of the carbon fibers is 0.1 mm or more and 2.5 mm or less.   The resin molded body according to any one of claims 11 to 16, wherein a content of the carbon fiber is 0.1 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the polyolefin.   The content of the compatibilizer is 1 part by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the resin including at least one of the amide bond and the imide bond. Resin molded body.   The content of a resin including at least one of the amide bond and the imide bond with respect to the mass of the carbon fiber is 0.1% by mass or more and 200% by mass or less. Resin molded body.   The resin molded body according to any one of claims 11 to 19, wherein a content of the compatibilizing agent with respect to a mass of the carbon fiber is 1% by mass or more and 100% by mass or less.