KR101864552B1 - Sizing agent for carbon-fiber, carbon-fiber and carbon-fiber reinforced plastic manufactured by using the same - Google Patents
Sizing agent for carbon-fiber, carbon-fiber and carbon-fiber reinforced plastic manufactured by using the same Download PDFInfo
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- KR101864552B1 KR101864552B1 KR1020170144937A KR20170144937A KR101864552B1 KR 101864552 B1 KR101864552 B1 KR 101864552B1 KR 1020170144937 A KR1020170144937 A KR 1020170144937A KR 20170144937 A KR20170144937 A KR 20170144937A KR 101864552 B1 KR101864552 B1 KR 101864552B1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/59—Polyamides; Polyimides
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/40—Fibres of carbon
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Abstract
According to one embodiment of the present invention, a polyamide precursor and a surfactant, wherein the polyamide precursor is selected from the group consisting of caprolactam (C 6 H 11 NO), hexamethylenediamine (C 6 H 16 N 2 ), adipic acid C 6 H 10 O 4 ) and sebacic acid (C 10 H 18 O 4 ).
Description
The present invention relates to a carbon fiber sizing agent, carbon fiber and carbon fiber reinforced plastic produced using the same.
Carbon fiber has excellent mechanical properties and is used with carbon fiber reinforced plastic (CFRP) together with matrix resin.
In order to manufacture carbon fiber-reinforced plastic, it is necessary to expand or weave carbon fiber. Since carbon fiber is vulnerable to damage due to friction during operation due to low elongation and high hardness, it is composed of plural filaments, Is required. For this reason, the sizing agent is coated on the surface of the carbon fiber. In addition to protecting the friction damage and maintaining the focusing, the sizing agent also improves the adhesion to the matrix resin.
Most carbon fiber reinforced plastics currently use thermosetting resins such as epoxy resins, polyester resins, and vinyl ester resins as matrix resins. Since epoxy resins are mainly used as sizing agents for carbon fibers, an epoxy resin It is the most widely used.
However, carbon fiber-reinforced plastics using a thermosetting resin as a matrix resin are complicated in molding process and post-processing, and are difficult to recycle and repair faults, resulting in high manufacturing costs. Recently, carbon fiber- reinforced plastics using a thermoplastic resin as a matrix resin But the adhesive strength between the epoxy sizing agent and the thermoplastic resin is weak and the mechanical properties are insufficient.
Therefore, even if a thermoplastic resin is used as a matrix resin, there is an increasing need to develop carbon fiber-reinforced plastic manufacturing technology that has excellent adhesive strength between a carbon fiber and a matrix resin and has excellent mechanical properties.
The present invention provides a carbon fiber sizing agent capable of providing excellent adhesion between a carbon fiber and a matrix resin even when a thermoplastic resin is used as a matrix resin, and a carbon fiber and a carbon fiber-reinforced plastic produced using the same. will be.
According to one embodiment of the present invention, there is provided a polyamide precursor composition comprising a polyamide precursor and a surfactant, wherein the polyamide precursor is caprolactam (C 6 H 11 NO), hexamethylenediamine (C 6 H 16 N 2 ), Adipic acid (C 6 H 10 O 4 ), and sebacic acid (C 10 H 18 O 4 ).
The surfactant may comprise a polyethylene acrylic acid copolymer.
Wherein the polyamide precursor comprises the caprolactam, the hexamethylenediamine, the adipic acid, and the sebacic acid, wherein the polyamide precursor comprises 50 to 75 parts by weight of the caprolactam, 7 to 20 parts by weight of the hexamethylenediamine, 10 to 20 parts by weight of the adipic acid, and 3 to 10 parts by weight of the sebacic acid.
The polyethylene acrylic acid copolymer may contain 80 to 95 parts by weight of ethylene and 5 to 20 parts by weight of acrylic acid based on 100 parts by weight of the polyethylene acrylic acid copolymer.
The polyamide precursor and the surfactant may be contained in a weight ratio of 80:20 to 55:45.
The polyamide precursor and the surfactant form a solid component, the solid component is dispersed in water in an emulsion form, and the concentration of the water-dispersed solid component may be 0.01 to 1.5 wt%.
According to another embodiment of the present invention, there is provided a carbon fiber sizing treatment using a carbon fiber sizing agent, wherein the carbon fiber sizing agent comprises a polyamide precursor and a surfactant, wherein the polyamide precursor is caprolactam (C 6 H 11 NO), at least one of hexamethylenediamine (C 6 H 16 N 2 ), adipic acid (C 6 H 10 O 4 ) and sebacic acid (C 10 H 18 O 4 ) The activator provides a carbon fiber comprising a polyethylene acrylic acid copolymer.
The carbon fiber sizing agent coating amount of the sizing treated carbon fiber may be 0.001 to 1.0 wt% based on the total weight of the carbon fiber.
According to another embodiment of the present invention, there is provided a carbon fiber sizing apparatus comprising a carbon fiber which has been subjected to sizing treatment using a carbon fiber sizing agent and a polyamide resin impregnated in the carbon fiber, wherein the carbon fiber sizing agent comprises a polyamide precursor and an interface It comprises an active agent, wherein the polyamide precursors are caprolactam (C 6 H 11 NO), hexamethylenediamine (C 6 H 16 N 2) , adipic acid (C 6 H 10 O 4) and sebacic acid (C 10 H 18 O 4 ), and the surfactant comprises a polyethylene acrylic acid copolymer.
As described above, according to the carbon fiber sizing agent according to one embodiment of the present invention, carbon fiber and carbon fiber reinforced plastic manufactured using the same, excellent adhesion can be obtained between the carbon fiber and the matrix resin even when the thermoplastic resin is used as the matrix resin So that a carbon fiber-reinforced plastic having excellent mechanical properties can be produced.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control. Also, although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, suitable methods and materials are described herein.
First, a carbon fiber sizing agent according to an embodiment of the present invention will be described in detail.
The carbon fiber sizing agent according to an embodiment of the present invention includes a polyamide precursor and a surfactant.
The polyamide precursor is at least one of caprolactam (C 6 H 11 NO), hexamethylenediamine (C 6 H 16 N 2 ), adipic acid (C 6 H 10 O 4 ) and sebacic acid (C 10 H 18 O 4 ) And may include any one of them.
The polyamide precursor may include caprolactam, hexamethylenediamine, adipic acid, and sebacic acid. In this case, the polyamide precursor may contain 50 to 75 parts by weight of caprolactam, 7 to 25 parts by weight of hexamethylenediamine, 10 to 20 parts by weight of adipic acid and 3 to 10 parts by weight of sebacic acid, and more preferably 55 to 70 parts by weight of caprolactam, 12 to 20 parts by weight of hexamethylenediamine, 12 to 18 parts by weight of adipic acid And 5 to 10 parts by weight of sebacic acid.
The carbon fiber sizing agent according to an embodiment of the present invention may be an aqueous solution in consideration of a mass production process of carbon fibers, and may include a surfactant for water dispersion stability.
The surfactant may be a polyethylene acrylic acid copolymer, and the polyethylene acrylic acid copolymer may include 80 to 95 parts by weight of ethylene and 5 to 20 parts by weight of acrylic acid with respect to 100 parts by weight of the polyethylene acrylic acid copolymer.
The carbon fiber sizing agent may include a polyamide precursor and a surfactant to form a solid component, and the solid component may be dispersed in an emulsion form, and the polyamide precursor and the surfactant may be contained in a weight ratio of 80:20 to 55:45 Preferably in a weight ratio of 70:30 to 60:40.
This is because when the content of the surfactant is less than 20 parts by weight based on the total weight of the solid content, the water dispersibility of the polyamide precursor is weakened, and the solid content precipitation may occur in the carbon fiber sizing agent during the process. If the content of the surfactant exceeds 45 parts by weight Because the content of the polyamide precursor is relatively low, the mechanical properties of the carbon fiber-reinforced plastic may be reduced.
The solid content of the carbon fiber sizing agent may have a melting point of 145 to 165 캜 and the solid content may be 0.01 to 1.5% by weight based on the total weight of the carbon fiber sizing agent. The viscosity of the carbon fiber sizing agent is 1 to 6 cP Lt; / RTI >
If the melting point of the solid component of the carbon fiber sizing agent is less than 145 캜, the sizing agent may be pressed against the drying apparatus to cause damage to the carbon fiber, and if it exceeds 165 캜, It is because.
Next, carbon fibers and carbon fiber reinforced plastics produced using the carbon fiber sizing agent according to the embodiment of the present invention will be described in detail.
The carbon fiber according to an embodiment of the present invention may be carbon fibers that have been subjected to sizing treatment using the carbon fiber sizing agent as described above. The carbon fiber reinforced plastic according to an embodiment of the present invention may be a sizing- Carbon fiber and matrix resin.
The carbon fiber sizing agent uses the carbon fiber sizing agent described above, and a duplicate description is omitted.
The carbon fibers may include PAN-based carbon fibers, pitch-based carbon fibers, rayon-based carbon fibers and the like, but preferably include PAN-based carbon fibers having a specific gravity of 1.7 to 1.9, and preferably have a specific gravity of 1.75 to 1.85 PAN-based carbon fibers.
This is because when the specific gravity is less than 1.7, voids and the like are present in a number of carbon fiber filaments forming the carbon fiber tow, so that the compactness of the carbon fiber filament is lowered and the carbon fiber reinforced plastic produced using the carbon fiber filament has a low compressive strength. Is more than 1.9, the lightening effect may be lowered.
In addition, the number of filaments per tow of carbon fiber tow can be from 1,000 to 50,000. When the number of filaments is less than 1,000, the cost per unit area of the carbon fiber-reinforced plastic is too low to manufacture the carbon fiber-reinforced plastic. Thus, when the number of filaments is more than 50,000, The tensile strength and the compressive strength of the carbon fiber-reinforced plastic produced may be lowered.
Such a sizing treatment of the carbon fibers can be performed by immersing the carbon fibers in an interiors containing the carbon fiber sizing agent.
The sizing agent coating amount of the sizing treated carbon fiber may be 0.001 to 1.0 wt% based on the total weight of the carbon fiber.
The matrix resin may include a polyamide resin.
The carbon fiber reinforced plastic according to the embodiment of the present invention is excellent in compatibility with a polyamide resin including carbon fibers obtained by sizing a carbon fiber with a carbon fiber sizing agent containing a polyamide precursor, Excellent mechanical strength due to excellent adhesive strength.
Hereinafter, the structure and effect of the present invention will be described in more detail with reference to examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.
Example 1
(1) Manufacture of carbon fiber sizing stock solution
A polyethylene acrylic acid copolymer (Sigma-aldrich) having a weight of 5% by weight of acrylic acid was sufficiently pulverized to a particle size of 2 탆 or less by using a bead mill, 180 g of pulverized polyethylene acrylic acid copolymer was added to 2 L of purified water, And the solution was mixed well by using a magnetic stirrer. At the same time, the ultrasonic dispersing machine was operated while heating to 80 ° C.
After 10 hours, 262.5 g of caprolactam, 65.1 g of hexamethylenediamine (Sigma-aldrich), 58.8 g of adipic acid and 33.6 g of sebacic acid were added to a polyethylene acrylic acid copolymer solution in which the polyethylene acrylic acid copolymer was completely dissolved in purified water The upper part of the container was covered with aluminum foil, and the solution was mixed well using a magnetic stirrer. While the solution was heated to 95 DEG C, the ultrasonic dispersing machine was operated for 24 hours so that the polyamide precursor and the polyethylene acrylic acid copolymer were completely dissolved in the purified water. .
The sizing stock solution was immersed in three vials of 50 g each, and the water was completely evaporated, and the content of the solid content was measured according to the following formula.
The solid content was measured five times and the average value of the contents was determined as the concentration of the sizing stock solution.
C Sz = (W Sz - W v ) / (W T - W V )
W V : mass of empty vial
W T : Mass of the vial containing the sizing stock solution
W Sz : Mass of the vial after water evaporation
C Sz : Solid content concentration of sizing stock solution
(2) Manufacture of carbon fiber sizing agent
13.34 g of the sizing stock solution prepared in the step (1) was mixed with 20 L of purified water to prepare a carbon fiber sizing agent. Sizing solution was added to purified water, and the mixture was stirred at room temperature for 2 hours using a mechanical stirrer or magnetic stirrer. The amount of purified water and sizing stock solution was calculated according to the following formula.
W Sz = (C f? W PW ) / (C Sz - C f )
C Sz : Solid content concentration of sizing stock solution
C f : Solid content of carbon fiber sizing agent
W PW : mass of purified water
W Sz : mass of the sizing stock solution to be added
(3) Preparation of sizing-treated carbon fibers
The carbon fiber sizing agent prepared in the step (2) was placed in the impregnation tank, and the surface was treated to completely immerse the dried carbon fiber (Toray high-tech material T700-24k) in the impregnation tank.
The carbon fibers were immersed through impregnation rolls having a diameter of 260 mm, and the impregnating rolls were kept in a sizing agent of 100 mm or more from the bottom. The carbon fibers having passed through the sizing agent impregnation tank were brought into contact with the contact type drying apparatus heated to 105 to 130 ° C for 2.5 seconds to evaporate water. Thereafter, the resultant was passed through an oven heated at 180 캜 for 100 seconds, and the carbon fiber was wound around a carbon fiber winder to produce a sizing-treated carbon fiber.
(4) Manufacture of carbon fiber reinforced plastic
The sizing-treated carbon fibers prepared in the step (3) were cut to a length of 6 mm to obtain a carbon fiber pellet. The mass ratio of the polyamide 6,6 resin and the carbon fiber was 7: 3 by using an extruder, A fiber reinforced resin composition was prepared. Thereafter, the carbon fiber-reinforced resin composition pellets were injection-molded to produce carbon fiber-reinforced plastics.
Example 2
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 1, except that 80.32 g of a sizing stock solution was added to purified water.
Example 3
Carbon fiber reinforced plastic was prepared in the same manner as in Example 1, except that 174.85 g of the sizing stock solution was added to the purified water.
Example 4
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 1, except that 352.78 g of a sizing stock solution was added to purified water.
Example 5
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 1, except that 526.86 g of the sizing stock solution was added to the purified water.
Example 6
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 1, except that a polyethylene acrylic acid copolymer (sigma-aldrich) having a content of acrylic acid of 15 wt% was used.
Example 7
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 6, except that 73.60 g of a sizing stock solution was added to purified water.
Example 8
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 6, except that 168.07 g of a sizing stock solution was added to purified water.
Example 9
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 6, except that 338.98 g of a sizing stock solution was added to purified water.
Example 10
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 6, except that 519.84 g of the sizing stock solution was added to the purified water.
Example 11
A carbon fiber-reinforced plastic was produced in the same manner as in Example 1, except that a polyethylene acrylic acid copolymer (sigma-aldrich) having an amount of 20% by weight of acrylic acid was used.
Example 12
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 11, except that 73.60 g of the sizing stock solution was added to the purified water.
Example 13
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 11, except that 161.29 g of a sizing stock solution was added to purified water.
Example 14
A carbon fiber-reinforced plastic was prepared in the same manner as in Example 11, except that 345.88 g of a sizing stock solution was added to purified water.
Example 15
A carbon fiber-reinforced plastic was produced in the same manner as in Example 11, except that 519.84 g of the sizing stock solution was added to the purified water.
Comparative Example 1
Carbon fibers (T700-50C-24k, Toray advanced material, T700-50C-24k) were cut to a length of 6 mm to prepare a carbon fiber 촙, and the extruder was used to compound the polyamide 6,6 resin and the carbon fiber in a mass ratio of 7: To prepare a reinforced resin composition. The prepared carbon fiber reinforced resin composition pellets were injection-molded to produce carbon fiber-reinforced plastics.
Comparative Example 2
Carbon fiber (T700-60E-24k, Toray advanced material, T700-60E-24k) was cut to a length of 6 mm to prepare a carbon fiber 촙, and the extruder was used to compound the polyamide 6,6 resin and the carbon fiber in a mass ratio of 7: To prepare a reinforced resin composition. The prepared carbon fiber reinforced resin composition pellets were injection-molded to produce carbon fiber-reinforced plastics.
Experimental Example
(1) Viscosity measurement of carbon fiber sizing agent
The viscosity of the carbon fiber sizing agents of Examples 1 to 15 was measured at room temperature using a viscometer (Brookfield LVDV-I +) at a rotational speed of 6.0 rpm using a No. 61 spindle.
(2) Measurement of sizing agent adhesion amount
The sizing treated carbon fibers prepared in Examples 1 to 15 and Comparative Examples 1 and 2 were purged in a nitrogen atmosphere and placed in an electric furnace heated to 500 DEG C and heat treated for 15 minutes to remove the sizing agent component except carbon fibers, The sizing agent adhesion amount was measured according to the formula.
S Z (%) = ((W 0 - W 1 ) / W 0 ) X 100 (%)
W 0 : mass of carbon fiber including sizing agent before heat treatment
W 1 : Mass of carbon fiber from which sizing agent is removed after heat treatment
S Z (%): Adhesion of sizing agent of carbon fiber
(3) Evaluation of physical properties of carbon fiber reinforced plastic
The tensile, flexural and impact resistance characteristics of the carbon fiber-reinforced plastics prepared in Examples 1 to 15 and Comparative Examples 1 and 2 were evaluated.
Tensile properties were evaluated using an Instron Model 8501 UTM and a load cell with a maximum load of 10 tons according to ASTM D638.
Flexural properties were evaluated using INSTRON Model 5985 UTM and load cell with maximum load of 5 tons according to ASTM D790 standard.
The impact resistance properties were evaluated using a CEAST MODEL 6898 impact strength tester and a 0.5 J hammer in accordance with ASTM D256 specifications.
After evaluating the physical properties, the carbon fiber-reinforced plastic was burned in an electric furnace heated to 500 DEG C for 50 minutes to measure the carbon fiber content in the carbon fiber-reinforced plastic. The calculation was carried out according to the following equation.
CF (%) = ((W 1 - W C ) / (W 0 - W C )) X 100 (%)
W C : mass of crucible used for measurement
W 0 : mass of crucible containing carbon fiber-reinforced plastic before burning
W 1 : mass of crucible containing residual after combustion
CF (%): Content of carbon fiber in carbon fiber reinforced plastic
The experimental results are shown in Tables 1 and 2 below.
(cP)
First, as shown in Table 1, the polyethylene acrylic acid copolymers having different acrylic acid contents were used in Examples 1 to 15, but the results showed that there was almost no difference in the solid content concentration, viscosity, and sizing amount of the carbon fibers in the sizing agent .
Next, as shown in Table 2, in Examples 1 to 15, although polyethylene acrylic acid copolymers having different acrylic acid contents were used, the polyamide precursor in the carbon fiber sizing agent of the present invention exhibited substantially similar physical properties, And it has been confirmed that it plays a large role in improving the compatibility of the fibers.
Compared with the carbon fiber-reinforced plastics of Comparative Examples 1 and 2, the carbon fiber-reinforced plastics of Examples 1 to 15 had excellent tensile strength, tensile elastic modulus, flexural strength, flexural modulus and impact strength, It was confirmed that the sizing of the carbon fibers using the carbon fiber sizing agent according to the embodiment of the present invention is superior to the conventional carbon fibers in compatibility with the polyamide resin.
As described above, according to the carbon fiber sizing agent according to one embodiment of the present invention, carbon fiber and carbon fiber reinforced plastic manufactured using the same, excellent adhesion can be obtained between the carbon fiber and the matrix resin even when the thermoplastic resin is used as the matrix resin So that a carbon fiber-reinforced plastic having excellent mechanical properties can be produced.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.
Claims (12)
The polyamide precursor may be selected from the group consisting of caprolactam (C 6 H 11 NO), hexamethylenediamine (C 6 H 16 N 2 ), adipic acid (C 6 H 10 O 4 ) and sebacic acid (C 10 H 18 O 4 ) And at least one of them,
Wherein the surfactant comprises a polyethylene acrylic acid copolymer.
Wherein the polyamide precursor comprises the caprolactam, the hexamethylenediamine, the adipic acid and the sebacic acid,
Wherein the polyamide precursor comprises 50 to 75 parts by weight of the caprolactam, 7 to 25 parts by weight of the hexamethylenediamine, 10 to 20 parts by weight of the adipic acid and 3 to 10 parts by weight of the sebacic acid relative to 100 parts by weight of the polyamide precursor. Sizing agent.
Wherein said polyethylene acrylic acid copolymer comprises 80 to 95 parts by weight of ethylene and 5 to 20 parts by weight of acrylic acid with respect to 100 parts by weight of said polyethylene acrylic acid copolymer.
Wherein the polyamide precursor and the surfactant are contained in a weight ratio of 80:20 to 55:45.
The polyamide precursor and the surfactant form a solid,
The solid content is dispersed in water in an emulsion form,
Wherein the water-dispersed solid content concentration is 0.01 to 1.5 wt%.
Wherein the carbon fiber sizing agent comprises a polyamide precursor and a surfactant,
The polyamide precursor may be selected from the group consisting of caprolactam (C 6 H 11 NO), hexamethylenediamine (C 6 H 16 N 2 ), adipic acid (C 6 H 10 O 4 ) and sebacic acid (C 10 H 18 O 4 ) At least one,
Wherein the surfactant comprises a polyethylene acrylic acid copolymer.
Wherein the polyamide precursor comprises the caprolactam, the hexamethylenediamine, the adipic acid and the sebacic acid,
Wherein the polyamide precursor comprises 50 to 75 parts by weight of the caprolactam, 7 to 25 parts by weight of the hexamethylenediamine, 10 to 20 parts by weight of the adipic acid and 3 to 10 parts by weight of the sebacic acid relative to 100 parts by weight of the polyamide precursor. .
The carbon fiber sizing agent coating amount of the sizing treated carbon fiber is 0.001 to 1.0 wt% based on the total weight of the carbon fiber.
And a polyamide resin impregnated with the carbon fibers,
Wherein the carbon fiber sizing agent comprises a polyamide precursor and a surfactant,
The polyamide precursor may be selected from the group consisting of caprolactam (C 6 H 11 NO), hexamethylenediamine (C 6 H 16 N 2 ), adipic acid (C 6 H 10 O 4 ) and sebacic acid (C 10 H 18 O 4 ) At least one,
Wherein the surfactant comprises a polyethylene acrylic acid copolymer.
Wherein the polyamide precursor comprises the caprolactam, the hexamethylenediamine, the adipic acid and the sebacic acid,
Wherein the polyamide precursor comprises 50 to 75 parts by weight of the caprolactam, 7 to 25 parts by weight of the hexamethylenediamine, 10 to 20 parts by weight of the adipic acid and 3 to 10 parts by weight of the sebacic acid relative to 100 parts by weight of the polyamide precursor. Reinforced plastic.
Wherein the polyamide precursor and the surfactant are contained in a weight ratio of 80:20 to 55:45.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220112031A (en) * | 2021-02-03 | 2022-08-10 | 도레이첨단소재 주식회사 | Resin coated carbon fiber and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH093777A (en) * | 1995-06-19 | 1997-01-07 | Nitto Boseki Co Ltd | Sizing agent for carbon fiber and carbon fiber |
| JP5843562B2 (en) * | 2011-10-20 | 2016-01-13 | 住友精化株式会社 | Carbon fiber sizing agent and carbon fiber bundle |
-
2017
- 2017-11-01 KR KR1020170144937A patent/KR101864552B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH093777A (en) * | 1995-06-19 | 1997-01-07 | Nitto Boseki Co Ltd | Sizing agent for carbon fiber and carbon fiber |
| JP5843562B2 (en) * | 2011-10-20 | 2016-01-13 | 住友精化株式会社 | Carbon fiber sizing agent and carbon fiber bundle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220112031A (en) * | 2021-02-03 | 2022-08-10 | 도레이첨단소재 주식회사 | Resin coated carbon fiber and manufacturing method thereof |
| KR102486097B1 (en) * | 2021-02-03 | 2023-01-06 | 도레이첨단소재 주식회사 | Resin coated carbon fiber and manufacturing method thereof |
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