JP2008068591A - Manufacturing method for carbon fiber reinforced resin molded article, and carbon fiber reinforced resin molded article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carbon fiber reinforced resin molded article which can be applied even to a molded article having a large thickness, and has a high mechanical strength, and to provide its manufacturing method. <P>SOLUTION: This manufacturing method for the carbon fiber reinforced resin molded article has three processes. In the first process (b process), a tension in the longitudinal direction of the carbon fiber is applied to the carbon fiber of which the surface is coated with a hardening agent-containing thermosetting resin composition (A), and the carbon fiber is immersed in a hardening agent-containing thermosetting resin composition (B). In the second process (c process) after the (b) process, under a state in which the carbon fiber of which the surface has been coated with the hardening agent-containing thermosetting resin composition (A), and to which the tension has been applied is immersed in the hardening agent-containing thermosetting resin composition (B), the hardening agent-containing thermosetting resin composition (B) is hardened. In the third process (d process) after the (c) process, the tension which has been applied to the carbon fiber is eliminated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing a carbon fiber reinforced resin molded body and a carbon fiber reinforced resin molded body.

Resins mixed with carbon fibers are called carbon fiber reinforced resins because of their high mechanical strength, and are widely used as materials for aircraft and sports equipment.
Conventionally, carbon fibers have been matted, arranged, or arranged in a woven form, impregnated with resin, cured, and molded. However, such a production method has not yet obtained a carbon fiber reinforced resin molded article having sufficient mechanical strength. Therefore, attempts have been made to reinforce the molded body by modifying the resin used as a raw material or by subjecting the carbon fiber surface to a chemical reaction, but it is still possible to obtain a carbon fiber reinforced resin molded body having sufficient mechanical strength. I couldn't.

  Apply the adhesive to the long fiber bundle in whole or in part, apply a constant tension along the direction of elongation of the long fiber bundle before the adhesive cures, and then maintain a constant tension after the adhesive has cured A long-fiber reinforced plastic reinforcement body having an open end has been studied (for example, see Patent Document 1). The reinforcing body obtained here is a rope or a linear object for fixing a concrete plate or the like, and is a fibrous object manufactured by bonding and fixing a long fiber bundle. Therefore, not only is it not intended to be used as a resin molded body, but nothing is mentioned about the interfacial adhesion technique between the fiber and the resin for improving the strength of the resin molded body.

On the other hand, it has been studied to improve the strength by irradiating a carbon fiber reinforced resin molded body with an electron beam (for example, see Patent Document 2). Although this method is suitable for improving fatigue strength and impact strength when fracture starts from the surface, the effect of the electron beam is from the surface to a thickness of about 200 μm, so the strength of the thicker molded body It was desired to develop another method for improvement.
JP 2003-268983 A JP 2002-371461 A

  An object of this invention is to provide the manufacturing method of a carbon fiber reinforced resin molding with high mechanical strength applicable also to a molded object with thickness.

The present inventors have studied the above-mentioned problems, and used a carbon fiber whose surface is coated with a curing agent-containing thermosetting resin composition (A), and the curing agent-containing thermosetting property in a state where tension is applied to the carbon fiber. By curing the resin composition (B), it was found that a carbon fiber reinforced resin molded body having high mechanical strength applicable to a thick molded body could be produced, and the invention was completed.
That is, the present invention
(Step b) While applying a tension to the carbon fiber whose surface is coated with the curing agent-containing thermosetting resin composition (A) in the longitudinal direction of the carbon fiber, the curing agent-containing thermosetting resin composition (B ) Soaking in,
(Step c) After step b, the curing agent-containing thermosetting resin composition with the surface coated with the curing agent-containing thermosetting resin composition (A) and the carbon fiber loaded with tension is immersed. Curing the product (B);
(D step) A method for producing a carbon fiber reinforced resin molded product, comprising a step of removing tension applied to the carbon fiber after the step c.
The method for producing a carbon fiber reinforced resin molded article of the present invention preferably further includes an a step as a pre-step of the b step. That is,
(A step) a step of coating the surface of the carbon fiber with the curing agent-containing thermosetting resin composition (A);
(Step b) After the step a, the carbon fiber whose surface is coated with the curing agent-containing thermosetting resin composition (A) is loaded with a tension in the longitudinal direction of the carbon fiber, and the curing agent-containing thermosetting property. A step of immersing in the resin composition (B);
(Step c) After step b, the curing agent-containing thermosetting resin composition with the surface coated with the curing agent-containing thermosetting resin composition (A) and the carbon fiber loaded with tension is immersed. Curing the product (B);
(D process) The manufacturing method of the carbon fiber reinforced resin molding characterized by having the process of removing the tension | tensile_strength loaded on the said carbon fiber after c process is preferable.

  The present invention includes a carbon fiber reinforced resin molded product produced by the method for producing a carbon fiber reinforced resin molded product.

  The method for producing a carbon fiber reinforced resin molded body of the present invention can be applied to a molded body having a large thickness, and the obtained carbon fiber reinforced resin molded body increases the maximum stress and fracture strain at the time of fracture.

Next, the present invention will be specifically described.
The method for producing a carbon fiber reinforced resin molded article of the present invention includes the following steps b to d;
Step b: The carbon fiber whose surface is coated with the curing agent-containing thermosetting resin composition (A) is loaded with a tension in the longitudinal direction of the carbon fiber, and the curing agent-containing thermosetting resin composition (B). Dipping in,
Step c: After step b, the curing agent-containing thermosetting resin composition with the surface coated with the curing agent-containing thermosetting resin composition (A) and the carbon fiber loaded with tension is immersed. A step of curing (B),
Step d: Step of removing the tension applied to the carbon fiber after step c.

The method for producing a carbon fiber reinforced resin molded article of the present invention preferably further includes a step before the b step;
a process: The process of coat | covering the surface of carbon fiber with a hardening | curing agent containing thermosetting resin composition (A).

When the a process exists, the b process is always performed after the a process.
As carbon fibers used in the present invention, fibers obtained by subjecting fibers produced by spinning polyacrylonitrile, petroleum pitch, phenolic resin, rayon, etc. as raw materials to heat treatment can be used, and in particular, carbon fibers produced from acrylic fibers are used. preferable.

The carbon fiber preferably has a fiber diameter in the range of 5 to 15 μm.
A filament may be used as the carbon fiber used in the present invention, but it is preferably used in the form of a strand in which filaments are bundled to about 3,000 to 20,000 from the viewpoint of easy handling.

  Further, in the present invention, from the viewpoint of the reinforcing effect of the carbon fibers, it is preferable that each carbon fiber is uniformly arranged in the molded body, but each carbon fiber is arranged uniformly in the molded body. Is inferior in work efficiency and ease of handling. Therefore, as the molded body of the present invention, using strand-like carbon fibers and arranging the strand-like carbon fibers uniformly in the molded body is excellent in ease of handling and reinforcing effect, and is a particularly preferable embodiment.

  The carbon fiber content in the carbon fiber reinforced resin molded article obtained in the present invention is usually 0.2 to 70 vol%, preferably 0.5 to 60 vol%, more preferably 0.7 to 50 vol%. A carbon fiber reinforced resin molded product having a carbon fiber content within the above range exhibits a high resin reinforcing effect.

Hereinafter, the steps a to d will be described in more detail.
[Step a]
The step a is a step of coating the surface of the carbon fiber with the curing agent-containing thermosetting resin composition (A). Here, the curing agent-containing thermosetting resin composition (A) is not particularly limited, but, for example, a composition using an epoxy resin as a thermosetting resin, an amine as a curing agent, specifically a modified aliphatic polyamine. , Unsaturated polyester resin as thermosetting resin, composition using peroxide such as methyl ethyl ketone peroxide as curing agent, phenol resin as thermosetting resin, amines as curing agent, specifically hexamethylenetetramine The composition using this is mentioned.

  Although there is no limitation in particular as a method of coat | covering the surface of carbon fiber, For example, it is easy to use the carbon fiber surface coating apparatus shown in FIG. 1 used in the Example. When the surface of the strand-like carbon fiber is coated using the apparatus shown in FIG. 1, the curing agent-containing thermosetting resin composition (28) is placed in the container (26), and the first roll (20 ) And the third roll (24) and between the second roll (22) and the third roll (24), the carbon fiber (30) is sandwiched between the first and third rolls. By moving the fiber (30), air bubbles present between the fibers are removed, and the affinity of the resin composition to the fiber surface is increased. As a result, the carbon fiber surface is uniformly formed of the curing agent-containing resin composition. Can be coated. Here, when air bubbles remain on the fiber surface, the strength of the carbon fiber reinforced resin molded product obtained in the present invention tends to be reduced.

[Step b]
The step b is to apply tension to the carbon fiber whose surface is coated with the curing agent-containing thermosetting resin composition (A) in the longitudinal direction of the carbon fiber and to cure the carbon fiber with a curing agent-containing thermosetting property. It is a step of immersing in the resin composition (B). The method for applying the tension is not particularly limited, but it is preferable to use, for example, the molded body manufacturing apparatus shown in FIG. When applying tension using the apparatus shown in FIG. 2, the position of the carbon fiber (strand) (10) whose surface is coated with the curing agent-containing thermosetting resin composition (A) is fixed to the fixture (6 7) and tension can be applied with bolt (4) and the tension can be adjusted.

  The tension applied to the carbon fiber varies depending on the type of carbon fiber and the type of resin and is not generally determined. However, in the examples described later, the tension is applied in the range of 5 to 15 kgf to the carbon fiber strand used. When it was done, the high reinforcement effect to the resin by carbon fiber was recognized.

  As a method of immersing the carbon fiber, the surface of which is coated with the curing agent-containing thermosetting resin composition (A) and being loaded with tension, in the curing agent-containing thermosetting resin composition (B), FIG. A mold for pouring the curing agent-containing thermosetting resin composition (B) was provided in advance as in the molded body production apparatus shown, and the surface was coated with the curing agent-containing thermosetting resin composition (A). A method of pouring the curing agent-containing thermosetting resin composition (B) after applying tension to the carbon fiber is simple and preferable. Although it does not specifically limit as a hardening | curing agent containing thermosetting resin composition (B), The same kind as a hardening | curing agent containing thermosetting resin composition (A) is preferable.

The curing agent-containing thermosetting resin composition (A) is preferably in a partially cured state at the time of step b, and preferably not in a completely cured state. Here, partial curing is a state in which a part of the curing agent-containing thermosetting resin composition (A) is cured, and complete curing is a state in which curing does not proceed any further even when heat is applied.

  Usually, during the transition from step a to step b, the curing reaction of the resin proceeds and changes from an uncured state to a partially cured state. By adjusting the time and temperature during this period, a curing agent-containing thermosetting resin is obtained. The cured state of the composition (A) can be controlled to a partially cured state suitable for the next step c.

[Step c]
Step c is a curing agent-containing thermosetting resin composition (B) in a state where the surface is coated with the curing agent-containing thermosetting resin composition (A) and carbon fibers loaded with tension are immersed. Is a step of curing.

  In the step c, the curing agent-containing thermosetting resin composition (A) needs to be similarly cured. When the curing agent-containing thermosetting resin composition (A) and the curing agent-containing thermosetting resin composition (B) are the same resin composition, the curing agent-containing thermosetting resin composition (B The curing agent-containing thermosetting resin composition (A) can also be cured under the conditions for curing. The curing agent-containing thermosetting resin composition (A) and the curing agent-containing thermosetting resin composition (B) are preferably basically the same resin composition.

  Specifically, curing of the curing agent-containing thermosetting resin composition (B) is performed by changing the curing speed depending on the types of the thermosetting resin and the curing agent and the blending amount of the curing agent, and by changing the ambient temperature. Also the curing rate can be adjusted.

[Step d]
The d process is a process of removing the tension applied to the carbon fiber. For example, when the apparatus of FIG. 2 is used, the tension can be removed by adjusting the bolt 4.

The carbon fiber reinforced resin molded article obtained by the method for producing a carbon fiber reinforced resin molded article of the present invention having the b to d steps or the ad processes is excellent in mechanical strength.
In addition to the above steps a to d, other steps may be provided. Examples of other processes include performing secondary molding such as cutting after the d process to obtain an appropriate shape.

  The carbon fiber reinforced resin molded product produced by the production method of the present invention having the above b to d steps or the above a to d steps has a maximum stress and a fracture strain at the time of destruction as compared with a conventional carbon fiber reinforced resin molded product. To increase. The conventional method for improving the strength by irradiating the carbon fiber reinforced resin molding with an electron beam cannot be applied when the thickness exceeds about 200 μm, whereas the carbon fiber reinforced resin molding of the present invention is not applicable. According to the manufacturing method of a body, a carbon fiber reinforced resin molded body can be manufactured regardless of the thickness. In addition, since the method for producing a carbon fiber reinforced resin molded article of the present invention does not require a large-scale apparatus such as an electron beam irradiation apparatus, the carbon fiber reinforced resin molded article can be produced with a simple apparatus, and carbon can be produced at low cost. A fiber reinforced resin molding can be manufactured.

  The reason why the carbon fiber reinforced resin molded product produced by the production method of the present invention increases the maximum stress and fracture strain compared to the conventional carbon fiber reinforced resin molded product is not clear, but the present inventors Increase in fracture strain accompanying moderate stress relaxation phenomenon at the interface with the curing agent-containing thermosetting resin composition, a wide specific surface area at the interface between the carbon fiber and the curing agent-containing thermosetting resin composition, It is estimated that the increase of dynamic friction force with compressive stress loading increases the maximum stress and fracture strain due to the unique pre-stress effect that enhances toughness.

〔Example〕
EXAMPLES Next, although an Example is shown and this invention is demonstrated further in detail, this invention is not limited by these.

In addition, the structure of the apparatus used for this invention is shown below.
<Carbon fiber surface coating device>
A carbon fiber surface coating apparatus is shown in FIG.

  The apparatus has aluminum rolls [first roll (20), second roll (22), and third roll (24)], the first roll (20) and the second roll. The roll (22) is installed in an aluminum container (26), and the third roll (24) changes the position in the vertical direction to change the carbon fiber into a curing agent-containing thermosetting resin composition (28). ) Soaked in.

<Molded product manufacturing device>
A molded body manufacturing apparatus is shown in FIG.
The apparatus is provided with 5 partition plates (3) made of silicon rubber and having a gap in the center at equal intervals in a tubular mold (2) having a length of 400 mm, a depth of 10 mm and a width of 2 mm, It has a molding die provided with four molding spaces between each partition plate, and the surface of the carbon fiber is a thermosetting resin containing a curing agent by using the carbon fiber surface coating device at the center of the partition plate. Adjust so that the surface-coated carbon fiber (10) coated with the composition is centered. And the both ends can be fixed using fixtures (6) and (7), and tension can be applied using bolts (4).

In this case, the actually loaded tension can be measured with a digital force gauge (12).
In the following examples and comparative examples, when processing the experimental data, in FIGS. 3 to 8 described later, the value obtained by dividing the tension on the horizontal axis by the cross-sectional area of the measurement part of the test piece is used as the prestress value. It was.

For example, when a tension of 15 kgf is applied to the carbon fiber, the cross-sectional area of the measurement part of the test piece is 10 mm ² , so that it is 14.70 MPa.
In the following examples and comparative examples, the purpose is to examine the reinforcing effect of the strand-like carbon fiber, so that the carbon fiber was placed at the center of the fracture portion of the test piece. [Example 1]
As the carbon fiber, Toray Co., Ltd. product (product name TORAYCA T800HB-12000; one 6 μm diameter, 12,000 strands bundled) was cut into a length of 580 mm and used.

In the container (26) of the carbon fiber surface coating apparatus (FIG. 1), an unsaturated polyester resin (manufactured by Kanki Processing Agent Co., Ltd., Lot. No. KE805PT63) having a prepolymer of maleic anhydride and ethylene glycol as main components, A curing agent-containing thermosetting resin composition in which a curing agent mainly composed of methyl ethyl ketone peroxide and dimethyl phthalate (Epoch Co., Ltd., product name P-01-005) is blended at a ratio of 1 part by weight to 100 parts by weight of the resin. Product (28) (standard cure time 6 hours) was fed and stored. Next, the carbon fiber (30) was set on top of the first roll (20) and the second roll (22). Thereafter, as shown in FIG. 1, the third roll (24) is set between the first roll (20) and the second roll (22) from above, and the carbon fiber (30) is placed in the first roll. (20) was sandwiched between the third roll (24) and between the second roll (22) and the third roll (24).

The carbon fiber was moved in the longitudinal direction of the fiber by the first to third rolls, and the surface of the carbon fiber was coated with the curing agent-containing thermosetting resin composition while removing air bubbles on the surface of the carbon fiber. The work during this time took about 5 minutes.

  Next, a molding die in which five partition plates (3) are installed at equal intervals in the tubular mold (2) of the molded body manufacturing apparatus (FIG. 2), and four molding spaces are provided between the partition plates. A surface-coated carbon fiber whose surface was coated with a curing agent-containing thermosetting resin composition was inserted into the carbon fiber so that the carbon fiber passed through the center of the partition plate, and both ends thereof were fixed.

A tension of 5 kgf (prestress value: 4.9 MPa) was applied using a bolt (4). The work during this time took about 5 minutes.
Then, the same curing agent-containing thermosetting resin composition as described above was supplied into the tubular mold (2), and allowed to stand at room temperature for 24 hours to be completely cured. Thereafter, the tension was removed, the mold was opened, and four resin molded bodies were obtained.

  From the obtained plate-shaped resin moldings, a test piece for a tensile test according to JIS K7161 by cutting (length 95 mm, width 10 mm, thickness 2 mm, central portion 25 mm long and width 5 mm constricted portion Created). Carbon fibers are arranged in the center of the constricted portion of the test piece, and the cross-sectional area ratio occupied by the carbon fibers in the constricted portion was 3.39%.

Using an Instron tensile tester, the fracture stress, fracture strain, and elastic modulus of this test piece were measured, and the results are shown in FIGS.
3 to 5 show the relationship between the prestress value and the fracture stress, fracture strain, and elastic modulus of the test piece.
[Examples 2 to 4]
A test piece was prepared in the same manner as in Example 1 except that the tension applied using the bolt (4) was 10 kgf, 15 kgf, and 20 kgf (prestress values: 9.8 MPa, 14.7 MPa, 19.6 MPa). did.

Using an Instron tensile tester, the fracture stress, fracture strain, and elastic modulus of this test piece were measured, and the results are shown in FIGS.
[Comparative Example 1]
A test piece was prepared in the same manner as in Example 1 except that no tension was applied.

Using an Instron tensile tester, the fracture stress, fracture strain, and elastic modulus of this test piece were measured, and the results are shown in FIGS.
In addition, in FIGS. 3-5, based on the fracture stress, fracture strain, and elastic modulus in Comparative Example 1 where no tension is applied, the fracture stress, fracture strain, and modulus of elasticity in Examples 1 to 4 loaded with each tension are shown. The difference is shown on the vertical axis of the figure.
[Example 5]
As the carbon fiber, a product of Toray Industries, Inc. (product name Torayca M30SC-18000-50C; one strand having a diameter of 6 μm and 18,000 bundles thereof) was cut into a length of 580 mm and used.

100: 20 (weight) ratio of epoxy resin (Nissin Resin Co., Ltd.) and modified aliphatic polyamine (Nisshin Resin Co., Ltd.) as a curing agent in the container 26 of the carbon fiber surface coating apparatus (FIG. 1). The curing agent-containing thermosetting resin composition (28) formulated in (1) was supplied and stored. Next, the carbon fiber (30) was set on top of the first roll (20) and the second roll (22). Thereafter, as shown in FIG. 1, the third roll (24) is set between the first roll (20) and the second roll (22) from above, and the carbon fiber (30) is placed in the first roll. (20) was sandwiched between the third roll (24) and between the second roll (22) and the third roll (24).

The carbon fiber was moved in the longitudinal direction of the fiber by the first to third rolls, and the surface of the carbon fiber was coated with the curing agent-containing thermosetting resin composition. The work during this time took 5 minutes.
Next, a molding die in which five partition plates (3) are installed at equal intervals in the tubular mold (2) of the molded body manufacturing apparatus (FIG. 2), and four molding spaces are provided between the partition plates. A surface-coated carbon fiber whose surface was coated with a curing agent-containing thermosetting resin composition was inserted into the two, and both ends thereof were fixed.

A tension of 5 kgf (prestress value: 4.9 MPa) was applied using a bolt (4). The work during this time took about 5 minutes.
Then, the same curing agent-containing thermosetting resin composition as described above was supplied into the tubular mold (2), and allowed to stand at room temperature for 24 hours to be completely cured. Thereafter, the tension was removed, the mold was opened, and four resin molded bodies were obtained.

  From the obtained plate-shaped resin moldings, a test piece for a tensile test according to JIS K7161 by cutting (length 95 mm, width 10 mm, thickness 2 mm, central portion 25 mm long and width 5 mm constricted portion Created). Carbon fibers are arranged in the center of the constricted portion of the test piece, and the cross-sectional area ratio occupied by the carbon fibers in the constricted portion was 5.09%.

Using an Instron tensile tester, the fracture stress, fracture strain, and elastic modulus of this test piece were measured, and the results are shown in FIGS.
6 to 8 show the relationship between the prestress value and the fracture stress, fracture strain, and elastic modulus of the test piece.
[Examples 6 and 7]
A test piece was prepared in the same manner as in Example 5 except that the tension applied using the bolt (4) was 10 kgf and 20 kgf (tension: 9.8 MPa, 19.6 MPa).

Using an Instron tensile tester, the fracture stress, fracture strain, and elastic modulus of this test piece were measured, and the results are shown in FIGS.
[Comparative Example 2]
A test piece was prepared in the same manner as in Example 5 except that no tension was applied.

Using an Instron tensile tester, the fracture stress, fracture strain, and elastic modulus of this test piece were measured, and the results are shown in FIGS.
[Comparative Example 3]
As the carbon fiber, Toray Co., Ltd. product (product name TORAYCA T800HB-12000; one 6 μm diameter, 12,000 strands bundled) was cut into a length of 580 mm and used. This carbon fiber was used without coating the surface of the carbon fiber with a curing agent-containing thermosetting resin composition.

  In the tube-shaped mold (2) of the molded body manufacturing apparatus (FIG. 2), five partition plates (3) are installed at equal intervals, and the carbon is placed in a molding die provided with four molding spaces between the partition plates. The fiber was inserted and both ends were fixed.

A tension of 18 kgf was applied using a bolt (4). The work during this time took about 5 minutes.
Thereafter, in the tubular mold (2), unsaturated polyester resin (manufactured by Kanki Processing Co., Ltd., Lot. A curing agent-containing thermosetting resin composition in which a curing agent mainly composed of phthalate (Epoch Co., Ltd., product name P-01-005) is blended at a ratio of 1 part by weight with respect to 100 parts by weight of the resin (standard curing time is 6 hours) and allowed to stand at room temperature for 24 hours to be completely cured. Thereafter, the tension was removed to obtain a resin molded body.

  From the obtained plate-shaped resin moldings, a test piece for a tensile test according to JIS K7161 by cutting (length 95 mm, width 10 mm, thickness 2 mm, central portion 25 mm long and width 5 mm constricted portion Created). Carbon fibers are arranged in the center of the constricted portion of the test piece, and the cross-sectional area ratio occupied by the carbon fibers in the constricted portion was 3.39%.

Using an Instron tensile tester, the fracture stress, fracture strain, and elastic modulus of each test piece were measured, and the results are shown in FIG.
[Comparative Example 4]
A test piece was prepared in the same manner as in Comparative Example 3 except that no tension was applied.

Using an Instron tensile tester, the fracture stress, fracture strain, and elastic modulus of each test piece were measured, and the results are shown in FIG.
The carbon fiber was pulled out from the resin portion, and the molded product had a low mechanical strength.

It is the schematic which shows the carbon fiber coating | coated apparatus used for the Example of this invention. It is the schematic which shows the molded object manufacturing apparatus used for the Example of this invention. It is a figure which shows the relationship between the fracture stress in Examples 1-4 and the comparative example 1, and a prestress value. It is a figure which shows the relationship between the fracture | rupture distortion in Examples 1-4 and the comparative example 1, and a prestress value. It is a figure which shows the relationship between the elasticity modulus in Examples 1-4 and the comparative example 1, and a prestress value. It is a figure which shows the relationship between the breaking stress in Examples 5-7 and the comparative example 2, and a prestress value. It is a figure which shows the relationship between the fracture | rupture distortion in Examples 5-7 and the comparative example 2, and a prestress value. It is a figure which shows the relationship between the elasticity modulus in Examples 5-7 and the comparative example 2, and a prestress value. It is a figure which shows the relationship between the breaking stress and the breaking strain in the comparative examples 3 and 4. FIG.

Explanation of symbols

2 ... Tubular mold 3 ... Partition plate 4 ... Bolt 6 ... Fixing tool 7 ... Fixing tool 8 ... Mold 10 for carbon fiber reinforced resin moldings ... Surface coated carbon Fiber 12 ... Digital force gauge 20 ... First roll 22 ... Second roll 24 ... Third roll 26 ... Container 28 ... Curing agent-containing thermosetting resin composition 30 ... carbon fiber

Claims (3)

(Step b) The carbon fiber whose surface is coated with the curing agent-containing thermosetting resin composition (A) is loaded with tension in the longitudinal direction of the carbon fiber, and the carbon fiber is cured with the curing agent-containing thermosetting resin. Dipping in the composition (B);
(Step c) After step b, the curing agent-containing thermosetting resin composition with the surface coated with the curing agent-containing thermosetting resin composition (A) and the carbon fiber loaded with tension is immersed. Curing the product (B);
(D process) The process of removing the tension | tensile_strength loaded on the said carbon fiber after the c process, The manufacturing method of the carbon fiber reinforced resin molding characterized by the above-mentioned. (A step) a step of coating the surface of the carbon fiber with the curing agent-containing thermosetting resin composition (A);
(Step b) After the step a, the carbon fiber whose surface is coated with the curing agent-containing thermosetting resin composition (A) is loaded with a tension in the longitudinal direction of the carbon fiber and the curing agent-containing thermosetting property. A step of immersing in the resin composition (B);
(Step c) After step b, the curing agent-containing thermosetting resin composition with the surface coated with the curing agent-containing thermosetting resin composition (A) and the carbon fiber loaded with tension is immersed. Curing the product (B);
(D process) The process of removing the tension | tensile_strength loaded on the said carbon fiber after the c process, The manufacturing method of the carbon fiber reinforced resin molding characterized by the above-mentioned.   The carbon fiber reinforced resin molded object manufactured by the manufacturing method of the carbon fiber reinforced resin molded object of Claim 1 or 2.

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