JPH02175972A - Heat-resistant resin composition and internal combustion engine parts using same - Google Patents

Abstract

PURPOSE:To obtain the title composition with high mechanical strength by incorporating a specific heat-resistant resin with carbon fiber coated, as assembling agent, with an aromatic sulfone resin and heat-treated. CONSTITUTION:Preferably, acrylic carbon fiber is dipped into a solution of an aromatic sulfone resin (e.g. linear polymer with arylene, ether and sulfone linkages as linkage units) to coat its surface with said resin followed by heat treatment at 300-400 deg.C, and the resultant carbon fiber thus coated is homogeneously blended with a heat resistant resin such as polyethersulfone, polyetherimide, polysulfone or polyamide-imide followed by injection molding, thus obtaining the objective heat-resistant resin composition with high mechanical strength. This composition is suitable for internal combustion engine parts such as impellers for integral centrifugal compressors.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat-resistant resin composition having excellent mechanical strength and parts for internal combustion engines using the same, such as impellers for integrated centrifugal compressors.

[Conventional technology] Polyether sulfone (hereinafter abbreviated as PES).

Polyetherimide (hereinafter abbreviated as PEI), bossulphone (hereinafter abbreviated as PSF), polyamideimide (hereinafter abbreviated as PSF)
(hereinafter abbreviated as FAI), polyimide (hereinafter abbreviated as PI), polyphenylene sulfide (hereinafter abbreviated as PPS), polyether ether ketone (hereinafter abbreviated as PEE), aromatic polyester (hereinafter abbreviated as PER), Heat-resistant resins such as polyetherketone (hereinafter abbreviated as PE) are called super engineering plastics because they are significantly superior to general-purpose engineering plastics in terms of heat resistance and mechanical strength, and are used in electrical and electronic equipment. It is used in various applications such as , machinery, and automobiles.

However, with recent advances in technology, there has been a demand for further improved properties of these heat-resistant resins, particularly mechanical strength.

For this reason, methods have been implemented to improve mechanical strength and heat resistance by blending fibrous reinforcing materials, particularly carbon fibers, with these heat-resistant resins.

Since carbon fiber is often used in carbon fiber reinforced plastics that have an epoxy resin matrix, epoxy resin is used as a binding agent for carbon fibers. However, although epoxy resin binding agents are effective when thermosetting resins such as epoxy resins are used as a matrix, they have poor adhesion to the heat-resistant resins, and resin compositions with good mechanical strength cannot be used. I can't get it. For this purpose, JP-A-53-106
As seen in Japanese Patent No. 752, attempts have been made to use polyamide resin as a binding agent for carbon fibers in place of thermoplastic resins. Furthermore, Japanese Patent Application Laid-Open No. 120730/1983 discloses the use of carbon fibers bound with aromatic polysulfone resin.

Conventional parts for internal combustion engines, such as impellers made of fiber-reinforced resin, include those described in Japanese Patent Publication No. 52-48684 and Japanese Patent Application Laid-Open No. 57-119105, and the resin materials constituting these impellers are is characterized by using carbon fiber as a reinforcing material for the resin.

In particular, JP-A-57-119105 describes that a carbon fiber reinforced resin using a heat-resistant thermoplastic resin or thermosetting resin as a matrix resin is used for an impeller.

[Problems to be Solved by the Invention] When carbon fibers converged with the epoxy resin or polyamide resin are applied to the heat-resistant resin, the molding temperature of these heat-resistant resins must be at least 300°C. As a result, the binding agent thermally decomposes during molding, resulting in problems such as the formation of voids and a decrease in the strength of the weld portion.

For this purpose, as seen in Japanese Patent Application Laid-Open No. 56-120730, carbon fibers converged with aromatic polysulfone resin are used to eliminate problems such as the generation of voids and a decrease in the strength of the weld part. There is little improvement in strength, and further improvement in mechanical strength is required.

The operating conditions for current internal combustion engine parts, such as centrifugal compressor impellers, are -50°C to 200°C (150°C as the maximum temperature during normal use), the maximum rotation speed is 13 x 10' rpm, and the problem occurs at maximum rotation. The maximum stress is approximately 20 kg for the current product (made of aluminum alloy, outer diameter approximately 60 mm)
/mm", and the purchase amount is about 10kg/mm" at the root.

By using fiber-reinforced resin with low specific gravity,
It is preferable to use it because it can reduce the maximum stress during rotation to about 100 lbs., but from the current usage conditions, it is difficult to use heat resistance 9 strength 1 elastic modulus, durability fatigue resistance, tensile creep properties, compression creep properties, etc. If materials are selected with this in mind, the thermoplastic resin or thermosetting resin disclosed in JP-A-57-119105 cannot be used as is for the impeller.

Fiber-reinforced resin compositions that satisfy these conditions include:
A composite of PES, PEI, PEE, heat-resistant resin such as PAI, carbon fiber, glass fiber, whiskers, etc. is considered. However, the above-mentioned resins have a high glass transition temperature or melting temperature, and the resin melting temperature during molding is 360%.
It is necessary to mold at a fairly high temperature of ℃ to 420℃.

In particular, regarding carbon fibers, currently commercially available carbon fibers for resin reinforcement use polyamide-based materials (decomposition temperature: 280°C) for thermoplastic resins as surface treatment materials (sizing agents).
, Epoxy system for thermosetting resin (decomposition temperature 300℃
) is mainly used, and at the resin melting temperature (360°C to 420°C) during molding mentioned above, it easily decomposes, and the interfacial strength decreases due to insufficient wetting between the carbon fiber and matrix resin, and the strength When used as an impeller material for a fiber-reinforced resin centrifugal compressor, there was a problem that the reinforcement hardening with carbon fibers was not effectively utilized and the strength was low.

The present invention was made to solve the various problems mentioned above, and its purpose is to have a sufficient reinforcing effect when blended with a heat-resistant resin, and when made into a composition, it has excellent mechanical strength and eliminates voids during molding. An object of the present invention is to provide a carbon fiber that exhibits less deterioration in production and weld strength, and a heat-resistant resin composition containing the same.

A second object is to provide internal combustion engine parts, such as an impeller for an integrated centrifugal compressor, made of the above-mentioned heat-resistant resin composition.

[Means for Solving the Problems] As a result of various studies, the inventors of the present invention found that after surface coating with an aromatic polysulfone resin as a sizing agent, carbon fibers heated at 300 to 400°C are blended with a heat-resistant resin. The present inventors have discovered that the above object can be achieved by doing so, and have completed the present invention.

That is, the present invention provides a carbon fiber whose surface is coated with aromatic polysulfone resin as a sizing agent and then heated at 300 to 400°C, a resin composition obtained by blending this carbon fiber with a heat-resistant resin, and this resin composition. This is an internal combustion engine part made using.

The heat-resistant resin used in the present invention is PES.

PE1. PSF, PAI, PI, PPS, P
EE, so-called super engineering plastics such as PER and PEK.

In the present invention, the aromatic polysulfone resin used as a sizing agent to coat the surface of carbon fibers is a linear polymer having arylene bonds, ether bonds, and sulfone bonds as bonding units, for example, as shown in the following formula. It is known that the structure consists of several structural units.

(1) MO0shaso, (TO÷MOObe)so・sha0(SI0(TO÷MO0shaSO・+0+◇TOshi70 +SOamSO□-5-O-→ These aromatic polysulfone resins For example,
It can be produced by the methods described in Japanese Patent Publication No. 10067, Japanese Patent Publication No. 42-7799, Japanese Patent Publication No. 47-617, etc., and one or more of these can be used.

For example, the polymer in (1) above is stirred at 150° C. for 5 hours in N2 containing dichlorodiphenyl sulfone, an aqueous sodium sulfide solution, and dimethyl sulfoxide.

Benzene is then added, all the water is removed azeotropically, the benzene is further removed by distillation, and the remaining mixture is heated with stirring at 170° C. for 7 hours to obtain the polymer.

In addition, the polymer of (2) above is prepared by neutralizing bisphenol A with benzene and [KO)I in N2 using 1M5O as a solvent, and removing the generated water by azeotrope with benzene. A DMSO solution of the salt is prepared, 4.4'-dichlorodiphenyl sulfone is added thereto, and polycondensation is carried out at 135°C for 4 to 5 hours.

Polysulfone resins represented by the structural unit (1) are, for example, manufactured by IC1 in the UK under the trade name 'VICTREX■, polyethersulfone (PES)', Sumitomo Chemical ML under the trade name 'Sumibroi S', and Mitsui East It is commercially available as "polyether sulfone (PES)" from Hydraulic Chemical. (2) Typical examples of structural units include:
Amoco Chemical Company's "Needel Polysulfone" (
Trademark)" etc.

The carbon fibers used in the present invention include acrylic, rayon, lignin, pitch, and the like, and any of them can be used. In the present invention, acrylic fibers having the highest fiber strength are most preferably used.

The carbon fiber may be in any form such as chopped strand, roving, or woven fabric. It is more preferable that the surface of these carbon fibers is previously oxidized by ozone or electrolytic oxidation.

As a method for coating these 4m carbon fibers with aromatic polysulfone resin, aromatic polysulfone resin is coated with dichloromethane, chloroform, 1.2 dichloroethane, 1,1,2.
2-tetrachloroethane, dimethyl sulfoxide, N
-Methyl-pyrrolidone, methylnitylketone, 1,1.
Carbon fibers are immersed in a solution dissolved in a solvent such as 2-trichloroethane, and then dried to remove the solvent to obtain carbon fibers coated with aromatic polysulfone resin.

The coating type of aromatic polysulfone resin on carbon fibers is preferably 0.1 to 10% by weight, particularly preferably 0.5 to 9% by weight, and more preferably 1 to 8% by weight, based on 100 parts by weight of carbon fibers. If the amount is less than 0.1% by weight, the effect of the present invention cannot be obtained, and if the amount exceeds 10% by weight, no further improvement in mechanical strength can be expected and it is meaningless.

The carbon fiber coated with the aromatic polysulfone resin as described above is heat-treated by exposing it in air to a temperature of 300 to 400°C, particularly preferably 340 to 380°C. The heat treatment time is 3 to 20 hours, particularly preferably 5 hours.
~15 hours.

Various methods can be adopted for mixing the carbon fiber coated with the aromatic polysulfone resin obtained in this manner and the heat-resistant resin. For example, 3 to 6 coated and heat-treated carbon fibers
It is also possible to cut the pieces into lengths of mm and feed the heat-resistant resin and the heat-resistant resin separately to a melt extruder and mix them together, or alternatively, after pre-blending them with a mixer such as a Henschel mixer, super mixer, or ribbon blender, melting It can also be fed to an extruder. Furthermore, the coated and heat-treated carbon fiber roving can be directly fed to a melt extruder and mixed with a heat-resistant resin.

In the present invention, the blending ratio of carbon fiber coated with aromatic polysulfone resin and heat-treated and heat-resistant resin as matrix resin is 5 to 50% by weight of carbon fiber, preferably 1
0 to 50% by weight, and 95 to 50% by weight of the heat-resistant resin.

If the blending amount of carbon fiber is less than 5% by weight, the tensile strength of the resulting resin composition will be low, which is not preferable. Furthermore, if more than 50% by weight of carbon fiber is blended, it will be difficult to uniformly melt and mix the resulting resin composition, and the melt fluidity will be significantly reduced, resulting in impaired molding processability such as injection molding. Become.

In the present invention, fillers such as talc, lucium carbonate, mica, and glass peas, fibrous reinforcing materials such as glass fiber, potassium titanate fiber, aramid fiber, and ceramic fiber are added to the heat-resistant resin composition as necessary. Stabilizers and colorants may be mixed in as long as they do not impair the quality and performance of the resin composition of the present invention.

The resin composition of the improved carbon fiber and heat-resistant resin of the present invention described above can be produced by injection molding or extrusion molding.

It can be molded into a predetermined molded article by a known molding method such as transfer molding or compression molding.

The resin composition of the present invention molded in this manner has excellent mechanical strength, particularly mechanical strength at high temperatures, and therefore can be used for mechanical parts, automobile parts, etc. that require high mechanical strength at high temperatures, such as gears. Used in cam bushings, pulleys, sleeves, etc., and as parts for internal combustion engines, such as impellers for integrated centrifugal compressors, exhaust system parts for mufflers such as manifolds, valve guides, valve stems, piston skirts, oil pans, front covers, Can be used for locker covers.

The heat-resistant resin composition of the present invention can be sufficiently used for manufacturing parts for internal combustion engines, such as impellers for integrated centrifugal compressors. PES, PEK as matrix resin
, PEEK is more preferable, and PES has a chlorine group at the end of the molecule and has a medium to high viscosity (3600 to 4800 voids), particularly preferably about 4100 voids, and PE refers to those represented by the general formula , and PEEK is expressed by the general formula. Furthermore, as the aromatic polysulfone resin used for surface treatment of carbon fibers, a low molecular weight one having a hydroxyl group at the end of the molecule is suitable, and a suitable coating amount thereof is 0.1-10% by weight based on the carbon fiber. It is. Particularly preferred is carbon fiber that is coated on the surface and then heat-treated at 350°C for about 10 hours.The amount of surface-treated carbon fiber to be blended varies depending on the matrix resin, but
Usually 10 to 50% by weight of the matrix resin is appropriate in the composition, 20 to 45% by weight if the matrix resin is PES, and 20 to 45% by weight if the matrix resin is PE.
0 to 40% by weight, and 20 to 50% by weight for PEE is suitable.

Generally known methods can be used to mold the internal combustion engine parts of the present invention, and optimal conditions are appropriately determined depending on the carbon fiber content and matrix resin.

The carbon fiber-reinforced heat-resistant resin composition is usually made into a pellet-shaped molding material that is easy to handle, and the product is manufactured by injection molding. At this time, to make pellets, heat-resistant resin and carbon fiber strands are blended using a known single-screw or twin-screw extruder, and the cylinder temperature is, for example, 350 to 350 for PES.
400℃ preferably 360-380℃, 38℃ for PEK
This is achieved by cross-extrusion and cutting at a temperature of 0 to 430°C, preferably 390 to 410°C, and for PEE, 360 to 420°C, preferably 370 to 390°C, with the compression ratio of the extruder screw set to 2 to 3. .

The obtained pellets were injection molded using a normal injection molding machine, with the cylinder temperature being slightly higher than the above, and the mold temperature being 16.
It can be carried out at a temperature of 0 to 210°C, preferably iao to 200°C, and it is possible to easily obtain parts for internal combustion engines having complicated shapes, such as inflators for integrated centrifugal compressors.

The present invention will be explained below based on the drawings.

FIG. 1 shows an impeller 1 as an example of an internal combustion engine component of the present invention.
FIG.

As shown in the figure, the impeller of a centrifugal compressor has a complicated shape and requires precise dimensional accuracy. As shown in FIG. 2, this impeller 1 is sandwiched between a sleeve 2 and a washer 3, and is fixed to a shaft portion 5 of a centrifugal compressor with a nut 4. The impeller of the present invention can be manufactured using the resin composition by a well-known method such as extrusion molding or injection molding.

For example, the impeller can be molded using the mold shown in FIG. That is, the bottle 7 is attached to the lower mold 10 combined with the large assembly mold 6 in which the impeller shape is engraved,
After that, the stopper mold 8 is tightly fixed, and the gate 9 is closed from the side.
The molding material is injected or extruded through the impeller-shaped portion (cavity portion) 11 and molded.

〔Example〕

Next, the present invention will be explained with reference to Examples and Comparative Examples.

Examples 1 to 3 Pictrex polyether sulfone PE55003P manufactured by Imperial Chemical Industries
(Trademark)” 20% by weight, dichloromethane 40% by weight,
1.1.2 A polyethersulfone solution consisting of 40% by weight trichloroethane was prepared. Acrylic carbon fiber whose surface has been oxidized in this polyether sulfone solution (
A roving (manufactured by Toho Rayon Co., Ltd., trade name: HTA, in the following Examples and Comparative Examples, this product was used as the carbon fiber except where specified) was continuously immersed at a speed of 60 M/) IR, dried, and desorbed. After applying solvent, cut into 3mm length,
It was made into chopped strands.

At this time, the amount of aromatic polyether sulfone resin attached to the carbon fibers was 5% by weight.

The carbon fiber chopped strands were placed in a stainless steel vat, placed in an electric furnace heated to 350°C, and heat-treated in an air atmosphere for 10 hours.

The carbon fiber chopped strands thus obtained were triblended with PEEK 450P manufactured by Imperial Chemical Industries as a heat-resistant resin in the proportions shown in Table 1, and then extruded using a 40 mm diameter extruder at a temperature of 380°C. An extrusion operation was performed while melt-kneading to obtain uniformly blended pellets.

Next, a dumbbell test piece was made from the uniformly mixed pellets using a normal injection molding machine under the temperature conditions of cylinder temperature 380°C and mold temperature 180°C, and the tensile strength was was measured and the results are shown in Table-1. Note that the conditions for measuring tensile strength in the following Examples and Comparative Examples are the same as in this Example except as specified.

Comparative Examples 1 to 3 Same as Example 1 except that acrylic carbon fibers converged with epoxy resin were used instead of the carbon fiber chopped strands coated with aromatic polyether sulfone resin and heat treated in Examples 1 to 3. In the same operation, carbon fiber compound P
A dumbbell test piece of EEK resin was prepared and the tensile strength was measured, and the results are shown in Table 1.

Comparative Examples 4 to 6 In Examples 1 to 3, acrylic carbon fibers converged with aromatic polyether sulfone resin were used instead of the chopped carbon fiber strands coated with aromatic polyether sulfone resin and heat treated. Resin dumbbell test pieces were prepared from carbon fiber-containing PEE in the same manner as in Examples 1 to 3, and the tensile strength was measured. The results are shown in Table 1.

Example 4 30% by weight of the carbon fiber chopped strands coated with the aromatic polyether sulfone resin obtained in Example 1 and heat treated were combined with Imperial Chemical Co., Ltd. as PES.
After tri-blending with 70% by weight PE54100P manufactured by Industries, Inc., extrusion was performed using a 40 mm mm machine at an extrusion temperature of 360° C. while melt-kneading to obtain a uniformly blended pellet. Next, a dumbbell test piece was made from the above uniformly mixed pellet using a normal injection molding machine under temperature conditions of a cylinder temperature of 380°C and a mold temperature of 170°C.
The tensile strength was measured and the results are shown in Table-1.

Comparative Example 7 Using carbon fibers prepared in the same manner as in Example 4 except for the heat treatment operation, a dumbbell test piece of carbon fiber-containing PES resin was prepared in the same manner as in Example 4, and the tensile strength was measured. was measured and the results are shown in Table 2.

Example 5 30% by weight of the carbon fiber chopped strands coated with the aromatic polyether sulfone resin obtained in Example 1 and heat treated, and ULTEM100 manufactured by GE as PEI.
After tri-blending with O (trade name) 70% by weight, 40%
An extrusion operation was performed using a mm diameter extruder at an extrusion temperature of 380° C. while melt-kneading, to obtain a uniformly blended pellet. Next, a dumbbell test piece was made from the above uniformly mixed pellet using a normal injection molding machine under the temperature conditions of a cylinder temperature of 380°C and a mold temperature of 160°C, and the tensile strength was measured. The results are shown in Table 2. Indicated.

Comparative Example 8 Using carbon fibers prepared in the same manner as in Example 5 except for the heat treatment operation, a dumbbell test piece of carbon fiber-containing PEI resin was prepared in the same manner as in Example 5, and the tensile strength was measured and the results are shown in Table 2.

Example 6 Tried 30% by weight of the carbon fiber chopped strands coated with aromatic polyethersulfone resin obtained in Example 1 and heat treated, and 70% by weight of Rydon P-4 (trade name) manufactured by Phillips Oil Co. as PPS. After blending, the mixture was extruded using a 40-diameter extruder at an extrusion temperature of 340° C. while melt-kneading to obtain a uniformly blended pellet. Next, a dumbbell test piece was made from the above uniformly mixed pellet using a normal injection molding machine under the temperature conditions of a cylinder temperature of 360°C and a mold temperature of 120°C, and the tensile strength was measured. The results are shown in Table 2. It was shown to.

Comparative Example 9 Using carbon fibers prepared in the same manner as in Example 6 except for the heat treatment operation, a dumbbell test piece of carbon fiber-containing pps resin was prepared in the same manner as in Example 6, and the tensile strength was measured. was measured and the results are shown in Table 2.

Comparative Example 1O A dumbbell test piece was prepared in the same manner as in Example 4, except that the heat treatment temperature of the chopped carbon fiber strand was changed to 250°C, and the tensile strength was measured. there were.

Comparative Example 11 Carbon In coated with aromatic polyether sulfone resin
The tensile strength of a dumbbell test piece obtained in the same manner as Comparative Example 10 except that the lff1 chopped strand was placed in an electric furnace heated to 450°C and heat-treated in an air atmosphere for 10 hours was 1840 kg. /cm2.

Example 7 “Needel Polysulfone P” manufactured by Amoco Chemical Company, USA
A polysulfone solution consisting of 20% by weight of "-1700 (trademark)" and 80% by weight of N-methyl-pyrrolidone was prepared. A roving of acrylic carbon fiber whose surface had been oxidized was continuously immersed in this polysulfone solution at a speed of 60 M/HR, dried and solvent removed, and then cut into 3 mm lengths to obtain chopped strands.

At this time, the amount of aromatic polyether sulfone resin attached to the carbon fibers was 5% by weight.

Using carbon fiber chopped strands obtained by heat treatment under the same conditions as Examples 1 to 3, dumbbell test pieces of carbon fiber-containing PEEK resin were created in the same manner as in Example 2, and the tensile strength was measured. However, it was 2310 kg/cm2.

Example 8 Polyacrylonitrile carbon fiber (LITA type manufactured by Toho Rayon Co., Ltd.) surface-treated by electrolytic oxidation was used with a low-molecular polyether sulfone resin (5003P manufactured by Mitsui Toatsu Chemical Co., Ltd.) having a hydroxyl group at the terminal group. Resin content 10-30 using N~methyl-pyrrolidone as a solvent
The chopped fibers were blended to % by weight and converged with a polyether sulfone convergence agent using xylene as a diluent, and then cut into 6 mm lengths. The chopped fibers were then heat treated in a heat treatment furnace in an air atmosphere under various conditions listed in Table 3. I did it.

Next, polyether sulfone resin (Mitsui Toatsu Chemical ■ 4100G) as a matrix resin and the carbon fiber treated above were combined with carbon! The content of a-fiber was 30% by weight.

This one is L/D=23. Compression ratio 3 diameter 65mm
Using a single-shaft vent type extrusion rock, the cylinder temperature is 370℃.
The molding material was extruded at a screw rotation speed of 45 rpm, and the strand was cut to obtain a pellet-shaped molding material.

After drying this product with hot air at 180°C for 5 hours, we used an injection molding machine of 75 TON (clamping pressure) made by Nippon Steel to make an AS with a thickness of 3 mm at a cylinder temperature of 370°C and a mold temperature of 160°C.
TM No. 1 dumbbell pieces were molded and then subjected to a tensile test. The results are shown in Table 3 together with the test results for those heat-treated at 400°C and those that were not heat-treated (blank). Figure 4 shows the relationship between heat treatment time and tensile strength of the samples of the examples. Shown below.

Looking at the heat treatment temperature and time, the optimum range is particularly preferably 370° C. for 10 hours. Furthermore, at this 370℃, 10
ASTM molded using carbon fiber subjected to time heat treatment
The temperature dependence of tensile strength was investigated using a No. I dumbbell piece. The results are shown in FIG. 5 together with the blank results.

In addition, using a molding material using carbon fiber that was heat-treated at 370°C for 10 hours as described above, the cylinder temperature was 380°C,
An impeller-shaped article was obtained by injecting into a mold having a structure as shown in Fig. 3 under molding conditions of a mold temperature of 200°C and an injection pressure of 1600 kg/am. was machined and fixed to the shaft with the structure shown in Figure 2, and was installed in a high-speed rotational strength testing machine (rotational speed 0-25°C) equipped with an air heating device (temperature range 0-600°C).
X 10'rpm) and the rotation speed is 13X 10'
Burst test (13X
for 60 minutes at 10'rpm). Also, 13X 1
According to a simple method to determine whether or not it can withstand continuous durability of 200 hours at 0'rpm, the instantaneous burst rotation speed at room temperature is 20
This experiment (2
Rotation for 5 seconds at 0×10'rpm) was also performed.

The results obtained are shown in Table 4.

Comparative Example 12 Polyether sulfone resin (410 manufactured by Mitsui Toatsu Chemical Co., Ltd.)
0G) carbon fiber (manufactured by Toho Rayon ■TA-C6E
, epoxy sizing agent) was blended in an amount of 30% by weight to prepare a pellet-shaped resin composition. Using this resin composition, an ASTMI dumbbell piece having a thickness of 3 mm was molded at a cylinder temperature of 370° C. and a mold temperature of 160° C., and a tensile test was conducted. The results are shown in FIG. 4 together with the results of Example 8.

Furthermore, using this resin composition, the cylinder temperature was 380°C.
An impeller-shaped article was obtained by injecting into a mold having a structure as shown in FIG. Similarly, after machining, a test was conducted.

The results are also shown in Table 4.

Comparative Example 13 Short fiber carbon fibers (HTA-C6N manufactured by Toho Rayon ■) converged with a polyamide-based convergence agent and polyether sulfone resin (4100G manufactured by Mitsui Toatsu Chemical ■) were combined to have a carbon fiber content of 30% by weight. A pellet-shaped resin composition was prepared by blending the resin compositions in the following manner. Using this resin composition, an experiment was conducted in exactly the same manner as described in Comparative Example 12. The results are shown in FIG. 4 and Table 4.

Comparative Example 14 Long-fiber carbon fibers (11TA type manufactured by Toho Rayon ■) converged with an epoxy-based convergence agent were fired once to a concentration of 0.3% to 1.5% by weight of the convergence agent on the surface of the carbon fibers. I went down. This long fiber carbon fiber was coated with polyether sulfone resin (manufactured by Mitsui Toatsu Chemical ■, 5003P) as a binding agent, and the chopped carbon fiber was cut into 6 mm length to give a concentration of 30% by weight. A pellet-shaped resin composition was prepared by blending with polyether sulfone resin (4100G manufactured by Mitsui Toatsu Chemical Co., Ltd.) as a matrix resin. An experiment similar to that described in Comparative Example 12 was conducted using this resin composition. The results are shown in FIG. 4 and Table 4.

Comparative Example 15 Long-fiber carbon fibers (HTA type manufactured by Toho Rayon) converged with an epoxy-based convergence agent were fired to reduce the convergence agent on the surface of the carbon fibers to 0.3% to 1.5% by weight. And so. The carbon fibers were coated with polyether sulfone resin (4100G manufactured by Mitsui Toatsu Chemical Co., Ltd.) as a binding agent on the long fiber carbon fibers, and the chopped carbon fibers were cut into 6 mm lengths so as to have a concentration of 30% by weight. A pellet-shaped resin composition was prepared by blending the resin with a polyether sulfone resin (4100G manufactured by Mitsui Toatsu Chemical Co., Ltd.) as a matrix resin. Using this resin composition, Comparative Example 1
An experiment similar to that described in 2 was conducted. The results are shown in FIG. 4 and Table 4.

Example 9 N-
The resin content was 10 using methyl-pyrrolidone as a solvent.
Polyacrylonitrile carbon fiber (manufactured by Toho Rayon ■, ITA type), which had been surface-treated by electrolytic oxidation, was converged using a polyethersulfone convergence agent prepared at ~30% by weight and further diluted with xylene. This was cut into chopped fibers having a length of 6 mm, and treated in a heat treatment furnace in an air atmosphere at 370° C. for 10 hours. Thereafter, polyether sulfone resin (4100G manufactured by Mitsui Toatsu Chemical ■) as a matrix resin and the carbon fibers subjected to the above treatment were mixed at a carbon fiber content of 0.20.30.40% per month.
．． A resin composition in the form of pellets was prepared by blending the resin compositions at a concentration of 50% by weight. Using this resin composition, Comparative Example 12
An experiment similar to that described was conducted. The results are shown in FIG. Furthermore, from among these resin compositions, only those with a carbon fiber content of 30% by weight were selected at a cylinder temperature of 380°C.
An impeller-shaped product was obtained by injecting into a mold having a structure as shown in FIG. 3 under molding conditions of 200° C. and an injection pressure of 1600 kg/cm. After machining, a burst test was conducted.The results are shown in Table 4.

Comparative Example 16 Polyether sulfone resin (Mitsui Toatsu Chemical ■410
0G) and carbon fiber (Toho Rayon 1 (TA-C6E)
, epoxy sizing agent) with a carbon fiber content of 10 to 4.
A pellet-shaped resin composition was prepared by blending the resin compositions so that the amount was 0% by weight. Using this resin composition, the cylinder temperature was 37
An ASTMI dumbbell piece with a thickness of 3 mm was molded at 0° C. and a mold temperature of 160° C., and a tensile test was conducted. The results are shown in FIG. 6 together with the results of Example 9.

Furthermore, the carbon fiber content of this resin composition is 30%.
Cylinder temperature: 380°C, mold: 20% by weight
The third molding condition was 0℃ and injection pressure 1600kg/cm''.
An impeller-shaped product was obtained by injection into a mold having the structure shown in the figure. After this, after machining in the same manner as described in Example 8,
A burst test was conducted.

The results are also shown in Table 4.

Table 4 (Note) O: Pass ×: Fail No burst Burst Example IO Polyetherketone resin (IC
A resin composition containing 30% by weight of carbon fiber was blended in the same manner as in Example 8, except that Pictrex (PEK) manufactured by Company I was used. This material was extruded using a 65φ shaft vented extruder with L/D=23 and a compression ratio of 3 at a cylinder temperature of 390° C. and a screw rotation speed of 45 rpm, and the strands were cut to obtain a pellet-shaped molding material. After drying this product with hot air at 180°C for 5 hours, using an injection molding machine manufactured by Nippon Steel New Co., Ltd. with a 75TON (mold clamping pressure), the cylinder temperature was 420°C and the mold temperature was 180°C, and a JI with a thickness of 3 mm was made.
A No. SI dumbbell test piece was molded, and then a tensile test was conducted.

The results are shown in Table 5 and FIG.

Table 5 Looking at the correlation between heat treatment temperature and time for carbon fibers treated with a sizing agent, the optimum range is particularly preferred at 370° C. for 10 hours. Furthermore, JIS molded using the molding material using carbon fiber that was heat-treated at 370°C for 10 hours.
The temperature dependence of tensile strength was investigated using a No. I dumbbell test piece. The results are shown in FIG.

In addition, using a molding material using carbon fiber that was heat-treated at 370°C for 10 hours as described above, the cylinder temperature was 400°C.
, injected into a mold having a structure as shown in Fig. 3 under the molding conditions of a mold temperature of 180°C and an injection pressure of 2000 kg/cm2,
An impeller-shaped object was obtained. The obtained shape is removed,
After performing mechanical processing such as a balance check, it was fixed to a shaft with the structure shown in FIG. 2, and a burst test was conducted under the same conditions as in Example 8. The results obtained are shown in Table 6.

Comparative Example 17 A polyacrylonitrile carbon fiber (HTA type manufactured by Toho Rayon ■) surface-treated by electrolytic oxidation was used with a low molecular weight polyether sulfone resin (5003P manufactured by Mitsui Toatsu Chemicals ■) having a hydroxyl group at the end of the molecule. Using N-methylpyrrolidone as a solvent, the blending ratio of resin and solvent is 10~
After blending to 30% by weight and converging with a polyether sulfone convergent using xylene as a diluent,
It was cut into a length of 6 mm to obtain short carbon fibers.

Using this carbon #a fiber, polyetherketone resin (IC1 product Pictrex (P)) was used as a matrix resin.
EK)) and the carbon fiber content was adjusted to 30% by weight.

This was prepared under conditions similar to those described in Example 1O, -
A pellet-shaped molding material was obtained using a vented shaft extruder. Further, using this molding material, an experiment similar to that described in Example 10 was conducted, and the results are also shown in Table 6.

Comparative Example 18 Short fiber carbon fibers (HTA-C6N manufactured by Toho Rayon ■) converged with a polyamide-based convergence agent and polyetherketone resin (Pictrex (PEK) manufactured by IC1) were combined to have a carbon fiber content of 30% by weight. A pellet-shaped resin composition was prepared by blending the resin compositions in the following manner. Using this resin composition,
The experiment was carried out in exactly the same manner as described in Comparative Example 17.

The results are shown in FIG. 7 and Table 6.

Comparative Example 19 Short fiber carbon 1i1 & fiber (manufactured by Toho Rayon ■ ITA-C6E) converged with an epoxy-based convergence agent and polyetherketone resin (Pictrex (PEK) manufactured by IC1) were combined with a carbon fiber content of 30% by weight. % to prepare a pellet-shaped resin composition. Using this resin composition, an experiment was conducted in exactly the same manner as described in Comparative Example 17. The results are shown in FIG. 7 and Table 6.

Example 11 Low molecular weight polyether sulfone resin having a hydroxyl group as a terminal group (manufactured by Mitsui Toatsu Chemical Co., Ltd.).

5003P) to a resin content of 10 to 30% by weight using N-methylpyrrolidone as a solvent, and a polyether sulfone sizing agent diluted with xylene. The treated polyacrylonitrile carbon fibers (cross-HTA type for Toho rayon) were collected. This was cut into short carbon fibers of 6 mm length and placed in a heat treatment furnace in an air atmosphere.
The treatment was carried out at 70°C for 10 hours. Thereafter, polyetherketone resin (Pictrex (PER) manufactured by IC1) as a matrix resin and the carbon fibers subjected to the above treatment were mixed at a carbon fiber content of 0.20.30.40.50 per month.
A resin composition in the form of a pellet was prepared by blending the resin compositions in such a manner that the following weight % was obtained. An experiment similar to that described in Comparative Example 17 was conducted using this resin composition. The results are shown in FIG.

Furthermore, from this resin composition, a carbon fiber content of 4
Only 0% by weight cylinder temperature 410℃, mold 2
The product was injected into a mold having a structure as shown in FIG. 3 under molding conditions of 00° C. and an injection pressure of 2100 kg/am 2 to obtain an impeller-shaped product. Thereafter, the material was machined in the same manner as described in Example 8, and then a burst test was conducted. The results are shown in Table 6.

Comparative Example 20 A low molecular weight polyether sulfone resin having a hydroxyl group as a terminal group (manufactured by Mitsui Toatsu Chemical Co., Ltd.).

5003P) to a resin content of 10 to 30% by weight using N-methylpyrrolidone as a solvent, and further diluted with xylene as a polyethersulfone-based sizing agent,
Using this sizing agent, polyacrylonitrile carbon fiber (manufactured by Toho Rayon Co., Ltd. H
TA type) was converged and cut into 6 mm lengths to obtain short fiber carbon fibers. Thereafter, polyetherketone resin (Pictrex (PE) manufactured by IC1) as a matrix resin and the above carbon fiber were blended so that the carbon fiber content was 20.30° and 40% by weight. A pellet-shaped resin composition was prepared. An experiment similar to that described in Comparative Example 17 was conducted using this resin composition. The results are shown in FIG.

Furthermore, the carbon fiber content of this resin composition is 30%.
% by weight was molded under the same conditions as described in Example 11, machined, and then subjected to a burst test. The results are shown in Table 6.

Table 6 and Chu Sipeng (Note) The burst test was compared between the results obtained when rotating at 13XlO'rpm for 20 hours and when rotating at 20X10'rpm for 5 seconds.

O: Pass Stable without bursts (no bursts)
Δ: Partially passed Some passed. Power stability ×: Fail None passed. From the results in Tables 4 and 6, the impellers molded in the Examples have higher heat resistance strength and durability than those of the Comparative Examples. It can be seen that the creep properties are low. Also, Comparative Example 1
2 and 18 (polyamide resin sizing agent) and Comparative Example 13
The commercially available carbon fibers shown in 1. and 19 (epoxy resin sizing agent) show relatively good physical properties (tensile strength) in a comparison of initial physical properties on test pieces, but in a burst test on an impeller-shaped object, The strength appears to be low. This is because the molding cycle when molding the impeller is longer than the molding cycle when molding the test piece.
~420℃ (PES), 380~430”C (PE)
This is thought to be because decomposition and gasification occur, causing retention and deterioration as a resin molding material, and remaining as minute voids in the molded product.

Example 12 A low molecular weight polyether sulfone resin (manufactured by Mitsui Toatsu Chemical ■ 5003P) having a hydroxyl group at the end of the molecule was mixed with the resin at a mixing ratio of 10 to 30% by weight using N-methylpyrrolidone as a solvent. Mix it and use xylene as a diluent to use as a polyether sulfone convergence agent. Polyacrylonitrile carbon fiber (Toho Rayon side body, HTA
After converging, the carbon fibers were cut into 6 mm lengths to obtain chopped carbon fibers, which were then heat treated in a heat treatment furnace in an air atmosphere under various conditions listed in Table 7.

Next, polyether ether ketone resin (PEER manufactured by Mitsui Toatsu Chemical Co., Ltd.) as a matrix resin and the carbon fibers treated above were blended so that the carbon fiber content was 40% by weight. This product was extruded using a 65 mm diameter-shaft vent type extruder with L/D of 23 and compression ratio of 3 at a cylinder temperature of 380° C. and a screw rotation speed of 45 rpm, and the strand was cut to obtain a pellet-shaped molding material. After drying this with hot air at 150°C for 5 hours, using a BOTON (mold clamping pressure) injection molding machine manufactured by Nisshin Jushi Kogyo, a JIS molding machine with a thickness of 3 mm was made at a cylinder temperature of 380°C and a mold temperature of 180°C.
A No. 1 dumbbell test piece was molded, and then a tensile test was conducted. The results are shown in Table 7 and FIG.

Table 7 Looking at the correlation between heat treatment temperature and time for carbon fibers treated with a sizing agent, the optimum range is particularly preferred at 370° C. for 10 hours. Furthermore, JIS molded using the molding material using carbon fiber that was heat-treated at 370°C for 10 hours.
The temperature dependence of tensile strength was investigated using a No. 1 dumbbell test piece. The results are shown in FIG.

In addition, using a molding material using carbon fiber heat-treated at 370°C for 10 hours as described above, the molding conditions were as shown in Figure 3, with a cylinder temperature of 390°C, a mold temperature of 180°C, an injection pressure of 2X00, and a diameter of 37 cm. An impeller-shaped object was obtained by injection into a mold with a similar structure.The obtained object was deburred, machined such as a balance check, and fixed to a shaft with the structure shown in Fig. 2, and heated with air. High-speed rotational strength tester with equipment (temperature range ○ to 600℃) (rotation speed 0 to 25
X 10'rpm), and the rotation speed is 13X 10
A burst test was conducted at various temperatures (room temperature, 100°C) at 100°C. Also, 13X lO'rpm
According to a simple method for determining whether or not the engine can withstand 200 hours of continuous durability, the instantaneous burst rotation speed at room temperature is 20X lO
This experiment was also conducted because it is necessary to satisfy the rpm or higher. The results obtained are shown in Table 8.

Comparative Example 21 A low molecular weight polyether sulfone resin (manufactured by Mitsui Toatsu Chemical Co., Ltd., 5003P) having a hydroxyl group at the end of the molecule, N-methylpyrrolidone was used as a solvent, and the blending ratio of resin and solvent was 10 to 30% by weight. %, and further xylene was used as a diluent to make a polyethersulfone type sizing agent. Polyacrylonitrile-based carbon fibers (Toho Rayon Side Wave, tITA type) surface-treated by electrolytic oxidation using this converging agent were converged and then cut into 6 mm lengths to obtain chopped carbon fibers. The carbon fibers were kneaded with polyether ether ketone resin (PEE manufactured by Mitsui Toatsu Chemical Co., Ltd.) as a matrix resin without heat treatment, and the carbon fiber content was adjusted to 40% by weight.

An experiment similar to that described in Example 12 was conducted using this product, and the results are also shown in Table 8.

Comparative Example 22 Short fiber carbon fibers (Toho Rayon Sidewave HTA-C6N) converged with a polyamide convergence agent and polyether ether ketone resin (PEE manufactured by Mitsui Toatsu Chemicals) were combined to have a carbon fiber content of 40% by weight. A pellet-shaped resin composition was prepared. Using this resin composition, an experiment was conducted in exactly the same manner as described in Comparative Example 21. The results are shown in FIG. 10 and Table 8.

Comparative Example 23 Chopped carbon fibers (HTA-C6E manufactured by Toho Rayon Co., Ltd.) converged with an epoxy-based convergence agent and polyether ether ketone resin (PEEK manufactured by Mitsui Toatsu Chemical Co., Ltd.) were combined to have a carbon fiber content of 40% by weight. A pellet-shaped resin composition was prepared by blending as follows. Using this resin composition,
The experiment was conducted exactly as described in Comparative Example 12. The results are shown in FIG. 10 and Table 8.

Example 13 A low molecular weight polyether sulfone resin (manufactured by Mitsui Toatsu Chemical ■ 5003P) having a hydroxyl group at the end of the molecule was converted into N
- Using methylpyrrolidone as a solvent, the resin content is 1
It was blended to a concentration of 0 to 30% by weight and further diluted with xylene to obtain a polyethersulfone-based sizing agent. Polyacrylonitrile carbon fiber (Toho Rayon Side Wave, HTA type) surface-treated by electrolytic oxidation using this sizing agent.
Converged. This was cut into lengths of 6 mm to obtain chopped carbon fibers, and heat treated in an air atmosphere at 370°C for 10 minutes.
Time processing was performed. After that, polyether ether ketone resin (P manufactured by Mitsui Toatsu Chemical Co., Ltd.) was used as a matrix resin.
A pellet-shaped resin composition was prepared by blending EεK) and the carbon fibers subjected to the above treatment so that the carbon fiber content was 20.30.40.50% by weight. An experiment similar to that described in Comparative Example 21 was conducted using this resin composition. The results are shown in Figure 12.Furthermore, from among these resin compositions, only those with a carbon fiber content of 30% by weight were prepared at a cylinder temperature of 390°C, a mold temperature of 200°C, and an injection pressure of 19%.
The product was injected into a mold having a structure as shown in FIG. 3 under molding conditions of 0.00 kg/cm" to obtain an impeller-shaped product.

Thereafter, machining was performed and a burst test was performed in the same manner as described in Example 12. The results are shown in Table 8.

Comparative Example 24 A low molecular weight polyether sulfone resin (manufactured by Mitsui Toatsu Chemical ■ 5003P) having a hydroxyl group at the end group was used, N-methylpyrrolidone was used as a solvent, and the blending ratio of resin and solvent (resin blending ratio) was 10 to 10. It was mixed to 30% by weight and further diluted with xylene to obtain a polyethersulfone sizing agent. After that, polyacrylonitrile-based carbon fibers (polyacrylonitrile carbon fibers) were surface-treated by electrolytic oxidation using this sizing agent.
(HTA type made by Toho Rayon), and this is 6m long.
It was cut into lengths of m to obtain chopped carbon fibers. This carbon fiber was not heat-treated, and the matrix resin (PEE manufactured by Mitsui Toatsu Chemical Co., Ltd.) and carbon fiber content were 20°30, 4.
A pellet-shaped resin composition was prepared by blending the resin compositions so that the amount thereof was 0% by weight. Using this resin composition, an experiment similar to that described in Comparative Example 21 was conducted. The results are shown in FIG.

Furthermore, the carbon fiber content of this resin composition is 30%.
% by weight was formed under the same conditions as described in Example 13, machined and burst tested. The results are shown in Table 8.

Table 8 (Note) In the burst test, the results were compared between the case of durability at 13XlO'rpm for 20 hours and the case of rotating at 20X10'rpm for 5 seconds.

02 Pass Stable without burst (No burst)
Δ: Partially passed Some passed. Stability ×; Fail None passed. According to the results in Table 8, the impellers molded in the examples were superior in heat-resistant strength and heat-resistant creep properties compared to those in the comparative examples. I know that there is. In addition, in the commercially available carbon fibers shown in Comparative Example 22 (polyamide-based sizing agent) and Comparative Example 23 (epoxy-based sizing agent), the sizing agent had a formation temperature of 360 to
At 420°C, decomposition and gasification occur, creating gaps due to poor wetting at the interface between the matrix tree and the carbon fibers, resulting in a decrease in strength compared to Example 12 (heat treated with a polyethersulfone sizing agent). it is conceivable that.

Example 14 30% by weight of chopped carbon fiber strands coated with aromatic polysulfone resin obtained in Example 1 and heat treated, and tlLTE manufactured by GE as polyetherimide resin.
After tri-blending 70% by weight of MI000 (trade name), extrusion was performed using a 40 mm diameter extruder while melt-kneading at an extrusion temperature of 380°C to obtain a uniformly blended pellet.

Next, a dumbbell test piece was made from the above uniformly mixed pellet using a normal injection molding machine at a cylinder temperature of 380°C and a mold temperature of 160°C, and the tensile strength was measured at 2360 g/cm2. there were.

Comparative Example 25 A carbon fiber was tested in the same manner as in Example 14, except that acrylic carbon fibers converged with epoxy resin were used in place of the carbon fiber chopped strands coated with aromatic polysulfone resin and heat treated in Example 14. Dumbbell test pieces of fiber-blended polyetherimide resin were prepared. The tensile strength was measured and was 1820 g/cm''.

Example 15 Tri-blend of 30% by weight of the carbon fiber chopped strands coated with aromatic polysulfone resin obtained in Example 1 and heat treated, and 70% by weight of Rydon P-4 (trade name) manufactured by Phillips Oil Co. as polyphenylene sulfide resin. After that, the extrusion temperature was 340℃ using a 40mm diameter extruder.
An extrusion operation was performed while melt-kneading at °C to obtain a uniformly blended pellet.

Next, a dumbbell test piece was made from the above uniformly mixed pellet using a normal injection molding machine at a cylinder temperature of 360'C and a mold temperature of 120°C, and the tensile strength was measured and found to be 2230 Kg/cm''. Ta.

Comparative Example 26 A test was conducted in the same manner as in Example 15, except that acrylic carbon fibers converged with epoxy resin were used instead of the carbon fiber chopped strands coated with aromatic polysulfone resin and heat treated in Example 15. A dumbbell test piece of carbon fiber-filled polyphenylene sulfide resin was prepared. The tensile strength was measured and found to be 1179 Kg/am2.

Example 16 “Pictrex Polyether Sulfone PE55003P” manufactured by Imperial Chemical Industries
(Trademark)” 10% by weight, dichloromethane 45% by weight
, 1,1.2)-A polyethersulfone solution consisting of 45% by weight of dichloroethane was prepared. A roving of acrylic carbon fiber whose surface has been oxidized is continuously immersed in this polyether sulfone solution at a speed of 80 M/) IR, dried and solvent removed, cut into 3 mm lengths, and chopped strands. And so.

At this time, the amount of aromatic polysulfone resin attached to the carbon fibers was 1%.

The carbon fiber chopped strands were placed in a stainless steel vat, placed in an electric furnace heated to 350°C, and heat-treated in an air atmosphere for 10 hours.

Except for using this heat-treated carbon fiber chopped strand, a resin dumbbell test piece was prepared from carbon fiber-containing PEE in the same manner as in Example 1, and the tensile strength was measured to be 2250 g/cm''. .

Example 17 A roving of acrylic carbon fiber whose surface had been oxidized was continuously immersed in the polyether sulfone solution prepared in Example 1 at a rate of 60 M/HR, and then dried to remove the solvent. Furthermore, this roving was again continuously immersed in a polyether sulfone solution at a rate of 60 M/HH, dried, and the solvent was removed.

At this time, the amount of aromatic polysulfone resin attached to the carbon fibers was 9%.

The carbon fiber chopped strands were placed in a stainless steel vat, placed in an electric furnace heated to 350°C, and heat-treated in an air atmosphere for 10 hours.

Carbon fiber compounded PEEK was prepared in the same manner as in Example 1 except that this heat-treated carbon fiber chopped strand was used.
A dumbbell test piece of the resin was prepared and its tensile strength was measured and found to be 2380 kg/cm2.

[Effects of the Invention] A heat-resistant resin composition in which a heat-resistant resin is blended with a heat-treated carbon fiber coated with an aromatic polysulfone resin of the present invention has excellent mechanical strength.

Furthermore, the internal combustion engine component of the present invention has the effect that the wettability between the carbon fiber and the matrix resin is improved, the interfacial strength is significantly improved, and the strength is improved.

In addition, for example, in the case of an impeller, its lighter weight improves its ability to follow engine load fluctuations, and furthermore, the accuracy of the product surface is extremely improved compared to those made of aluminum alloy, so the suction during high-speed rotation is improved. The phenomenon of separation of air from the blade surface can be reduced, and the effect of increasing suction compression efficiency can also be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an impeller as an example of the present invention; FIG. 2 is a sectional view of the impeller shown in FIG. 1 attached to a shaft; FIG. 3 is a sectional view of an impeller mold; Figures 4, 7, and 10 are curve diagrams showing the heat treatment time and tensile strength of the carbon fiber used to manufacture the impeller of the present invention, and the matrix resin is P in Figure 4.
ES, PEK in FIG. 7, PEE in FIG. 10, and FIGS. 5, 8, and 11 are curve diagrams showing the temperature dependence of tensile strength with and without heat treatment of carbon fiber. In Figure 5, the matrix resin is PE.
S, PE in Figure 8, P in Figure 11
EEK, and FIGS. 6, 9, and 12 are curve diagrams showing the relationship between reinforcing fiber content and tensile strength in carbon fibers without heat treatment and carbon fibers of the present invention (with heat treatment). The matrix resin is PES in FIG. 6, PEK in FIG. 9, and PEE in FIG. 12. 1... Impeller 2... Sleeve 3...
Washer 4...Nut 5...Shaft
6... Assembly price type 7... Bin
8... Upper mold 9... Gate IO... Lower mold 11... Impeller shaped part (cavity) A... Molding material inlet Patent applicant Mitsui Toatsu Chemical Co., Ltd. Nissan Motor Co., Ltd.

Claims (1)

[Claims] 1. After coating the surface with aromatic polysulfone resin,
Carbon fiber heated at 0-400°C. 2. A heat-resistant resin composition comprising 5-50% by weight of the carbon fiber according to claim 1 and 95-50% by weight of a heat-resistant resin. 3. Heat-resistant resin is polyethersulfone, polyetherimide, polysulfone, polyamideimide, polyimide,
The heat-resistant resin composition according to claim 2, which is polyphenylene sulfide, polyetheretherketone, aromatic polyester or polyetherketone. 4. A component for an internal combustion engine, characterized in that the heat-resistant resin composition according to claim 2 or 3 is used. 5. The internal combustion engine component according to claim 4, wherein the internal combustion engine component is an impeller of an integrated centrifugal compressor.