CN110423462A - Carbon fiber reinforced polyamide composite material product and preparation method thereof - Google Patents
Carbon fiber reinforced polyamide composite material product and preparation method thereof Download PDFInfo
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- CN110423462A CN110423462A CN201910715951.XA CN201910715951A CN110423462A CN 110423462 A CN110423462 A CN 110423462A CN 201910715951 A CN201910715951 A CN 201910715951A CN 110423462 A CN110423462 A CN 110423462A
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- Prior art keywords
- carbon fiber
- composite material
- polyamide
- fiber reinforced
- reinforced polyamide
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- 239000004952 Polyamide Substances 0.000 title claims abstract description 239
- 229920002647 polyamide Polymers 0.000 title claims abstract description 234
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 220
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 196
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 196
- 239000002131 composite material Substances 0.000 title claims abstract description 127
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title description 3
- 238000001746 injection moulding Methods 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000002844 melting Methods 0.000 claims abstract description 35
- 230000008018 melting Effects 0.000 claims abstract description 35
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 23
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 23
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims description 35
- 239000000835 fiber Substances 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 23
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 12
- 230000004048 modification Effects 0.000 claims description 11
- 238000012986 modification Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- -1 polypropylene Polymers 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 150000001412 amines Chemical class 0.000 claims description 5
- 238000004513 sizing Methods 0.000 claims description 5
- 239000002023 wood Substances 0.000 claims description 4
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 150000001408 amides Chemical class 0.000 claims 2
- 238000005452 bending Methods 0.000 abstract description 22
- 238000005453 pelletization Methods 0.000 abstract description 12
- 230000003014 reinforcing effect Effects 0.000 abstract description 6
- 229920002292 Nylon 6 Polymers 0.000 description 82
- 229920002302 Nylon 6,6 Polymers 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- 238000002679 ablation Methods 0.000 description 9
- 239000003365 glass fiber Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 8
- OKOBUGCCXMIKDM-UHFFFAOYSA-N Irganox 1098 Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)NCCCCCCNC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 OKOBUGCCXMIKDM-UHFFFAOYSA-N 0.000 description 7
- 238000011056 performance test Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 229940125782 compound 2 Drugs 0.000 description 4
- 229940126214 compound 3 Drugs 0.000 description 4
- 229940125898 compound 5 Drugs 0.000 description 4
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
- 229920003189 Nylon 4,6 Polymers 0.000 description 3
- 229920000305 Nylon 6,10 Polymers 0.000 description 3
- 229920000572 Nylon 6/12 Polymers 0.000 description 3
- 229920006152 PA1010 Polymers 0.000 description 3
- 229940125904 compound 1 Drugs 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 229920006396 polyamide 1012 Polymers 0.000 description 3
- FGHOOJSIEHYJFQ-UHFFFAOYSA-N (2,4-ditert-butylphenyl) dihydrogen phosphite Chemical class CC(C)(C)C1=CC=C(OP(O)O)C(C(C)(C)C)=C1 FGHOOJSIEHYJFQ-UHFFFAOYSA-N 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 235000019260 propionic acid Nutrition 0.000 description 2
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000009955 starching Methods 0.000 description 2
- UPLPHRJJTCUQAY-WIRWPRASSA-N 2,3-thioepoxy madol Chemical compound C([C@@H]1CC2)[C@@H]3S[C@@H]3C[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@](C)(O)[C@@]2(C)CC1 UPLPHRJJTCUQAY-WIRWPRASSA-N 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000004464 hydroxyphenyl group Chemical group 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/06—Polyamides derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/544—Silicon-containing compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
Abstract
The invention discloses a kind of carbon fiber reinforced polyamide composite material products, the material of the carbon fiber reinforced polyamide composite material product includes the component of following weight percentage: polyamide 28.2%~79.2%, the modified carbon fiber 20%~60% in surface, silane coupling agent 0.4%~0.8%, compatilizer 0%~10%, antioxidant 0.4%~1%, the carbon fiber reinforced polyamide composite material product are molded to obtain by mixed once.The invention also discloses a kind of preparation methods of carbon fiber reinforced polyamide composite material product.The average length of carbon fiber reaches 1.52mm~2.21mm in the carbon fiber reinforced polyamide composite material product that the present invention is prepared, reinforcing effect is preferable, compared with traditional first extruding pelletization carbon fiber reinforced polyamide composite material product that second melting injection molding process is prepared again, tensile strength, stretch modulus, bending strength and bending modulus are significantly improved.
Description
Technical field
The present invention relates to polyamide material field more particularly to carbon fiber reinforced polyamide composite material product and its preparations
Method.
Background technique
Polyamide is due to having a wide range of applications with excellent heat resistance, corrosion resistance, wearability etc..Carbon fiber
Have the characteristics that high-intensitive, low-density and corrosion-resistant, is commonly used to carry out enhancing modification to polyamide, it is strong with the ratio for improving polyamide
Degree.
Currently, using carbon fiber come reinforced polyamide when, usually first will carbon fiber and melt polyurethane mix after squeeze out
Carbon fiber reinforced polyamide material is obtained, when needing to be prepared into product, carbon fiber reinforced polyamide material is melted into note again
Modeling obtains, since second melting injection molding can cause compared with havoc carbon fiber, finally obtained carbon fiber reinforced polyamide material
Carbon fiber length is shorter in product, and reinforcing effect is poor.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The main purpose of the present invention is to provide a kind of carbon fiber reinforced polyamide composite material product and preparation method thereof,
Aim to solve the problem that current carbon fiber reinforced polyamide material needs second melting injection molding that can just obtain carbon fiber reinforced polyamide material
Product, carbon fiber length is shorter in finally obtained carbon fiber reinforced polyamide material product, the poor problem of reinforcing effect.
In order to achieve the above object, the present invention provides a kind of carbon fiber reinforced polyamide composite material product, the carbon fiber
The material of reinforced polyamide composite product includes the component of following weight percentage: polyamide 28.2%~79.2%, table
The modified carbon fiber 20%~60% in face, silane coupling agent 0.4%~0.8%, compatilizer 0%~10%, antioxidant 0.4%~
1%, the carbon fiber reinforced polyamide composite material product is molded to obtain by mixed once.
Preferably, the material of the carbon fiber reinforced polyamide composite material product includes the group of following weight percentage
Point: polyamide 40.7%~78.2%, the modified carbon fiber 20%~50% in surface, silane coupling agent 0.5%~0.8%, phase
Hold agent 0%~8%, antioxidant 0.6%~1%.
Preferably, the modified carbon fiber in the surface handles to obtain by thermoplasticity sizing agent.
Preferably, the compatilizer includes high-density polycthylene grafted maleic anhydride, polypropylene grafted maleic anhydride and gathers
At least one of styrene-grafted maleic anhydride.
Preferably, the melt index of the polyamide is greater than or equal to 15g/10min.
In addition, in order to achieve the above object, the present invention also provides a kind of systems of carbon fiber reinforced polyamide composite material product
The preparation method of Preparation Method, the carbon fiber reinforced polyamide composite material product includes:
Following raw materials: polyamide 28.2%~79.2% are weighed according to following weight percent, silane coupling agent 0.4%~
0.8%, compatilizer 0%~10%, antioxidant 0.4%~1%；
By the weighed polyamide, the silane coupling agent, the compatilizer and the antioxidant are uniformly mixed and obtain
Polyamide compound；
By the polyamide compound from the throat-fed for being kneaded injection molding machine, by the modified carbon fiber in surface from side material mouth
Charging, so that the carbon fiber that the polyamide compound and the surface are modified is mixed to get melting in the mixing injection molding machine
Carbon fiber reinforced polyamide composite material under state, wherein control the carbon of the polyamide compound and surface modification
The feed rate of fiber, weight percent 20%~60% of the carbon fiber for keeping surface modified in total raw material；
The carbon fiber reinforced polyamide composite material under molten condition in mixing injection molding machine is injected into mold, it is cold
But carbon fiber reinforced polyamide composite material product is obtained.
Preferably, the mixing injection molding machine includes resin melting area, fiber mixing zone and injection molding area, the resin melting area
Temperature with fiber mixing zone is (T0+ 40 DEG C)~(T0+ 70 DEG C), the temperature in the injection molding area is (T0+ 30 DEG C)~(T0+50
DEG C), wherein T0Indicate the fusing point of the polyamide.
Preferably, the screw speed for being kneaded injection molding machine is 30RPM~100RPM.
Preferably, polyamide drying and processing 3h~5h at 80 DEG C~110 DEG C before weighing.
Preferably, the compatilizer includes high-density polycthylene grafted maleic anhydride, polypropylene grafted maleic anhydride and gathers
The melt index of at least one of styrene-grafted maleic anhydride, the polyamide is greater than or equal to 15g/10min.
A kind of carbon fiber reinforced polyamide composite material product provided by the invention and preparation method thereof.The carbon fiber increases
The material of strong polyamide composite article includes the component of following weight percentage: polyamide 28.2%~79.2%, surface
Modified carbon fiber 20%~60%, silane coupling agent 0.4%~0.8%, compatilizer 0%~10%, antioxidant 0.4%~
1%, the carbon fiber reinforced polyamide composite material product is molded to obtain by mixed once.The carbon fiber that the present invention is prepared
The average length for tieing up carbon fiber in reinforced polyamide composite product reaches 1.52mm~2.21mm, and reinforcing effect is preferable, with biography
The first extruding pelletization of the system carbon fiber reinforced polyamide composite material product phase that second melting injection molding process is prepared again
Than tensile strength, stretch modulus, bending strength and bending modulus significantly improve.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Firstly, the preparation method to carbon fiber reinforced polyamide composite material product provided in an embodiment of the present invention carries out letter
It summarizes.
The present embodiments relate to carbon fiber reinforced polyamide composite material product preparation method it is as described below:
(1), following raw materials: polyamide 28.2%~79.2%, silane coupling agent are weighed according to following weight percent
0.4%~0.8%, compatilizer 0%~10%, antioxidant 0.4%~1%.
Wherein, the polyamide can be any one polyamide, such as polyamide 6 (Polyamide6, PA6), polyamides
Amine 66 (Polyamide66, PA66), polyamide 610 (Polyamide610, PA610), polyamide 1010
(Polyamide1010, PA1010), polyamide 1012 (Polyamide1012, PA1012), polyamide 612
One of (Polyamide612, PA612), polyamide 46 (Polyamide46, PA46).Further, the polyamides of molten state
When the carbon fiber that amine and surface are modified mixes in being kneaded injection molding machine, the mobility of polyamide is higher, then to the shearing of carbon fiber
It acts on smaller.Therefore, in the present invention, it is preferable that the polyamide selects molten state with the polyamide of high fluidity；Polyamide
The mobility of molten state can be embodied by the melt index of polyamide, and the melt index of polyamide is bigger, when molten polyamide state
Mobility it is higher, it is therefore preferred that the melt index of the polyamide be greater than or equal to 15g/10min；Further, preferably
The melt index on ground, the polyamide is greater than or equal to 20g/10min.The melt index of polyamide is bigger, molten polyamide state
When mobility it is higher, it is smaller to the shear action of carbon fiber in the carbon fiber mixed process modified with surface so that
The length for the carbon fiber in carbon fiber reinforced polyamide composite material product being finally prepared is bigger, biggish fibre length
Enable to carbon fiber and polyamide substrate surface that there is stronger bonding strength, carbon fiber is not easy de- from polyamide substrate
Out, so that carbon fiber can play better humidification.It is to be appreciated that the molecular weight of adjustment polyamide is changeable
Its melt index can be adjusted to be greater than by the melt index of polyamide, any one of the above polyamide by adjusting molecular weight
Or it is equal to 15g/10min；Or further its melt index is adjusted to be greater than or equal to 20g/10min.
The silane coupling agent can be any one silane coupling agent.Maleic anhydride graft phase can be selected in the compatilizer
Hold agent, including high-density polycthylene grafted maleic anhydride (HDPE-g-MAH), polypropylene grafted maleic anhydride (PP-g-MAH) and
At least one of polystyrene graft maleic anhydride (PS-g-MAH), it is preferable that the compatilizer selects high density polyethylene (HDPE)
Grafted maleic anhydride.The antioxidant includes three [2.4- di-tert-butyl-phenyl] phosphite esters (irgasfos 168), four [β-(3,5-
Di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester (antioxidant 1010) and N, N'- it is bis--(3- (3,5- di-t-butyl -4-
At least one of hydroxy phenyl) propiono) hexamethylene diamine (antioxidant 1098).
Preferably, polyamide drying and processing 3h~5h at 80 DEG C~110 DEG C before weighing, to remove in polyamide
Moisture.
(2), the weighed polyamide, the silane coupling agent, the compatilizer and the antioxidant are uniformly mixed
Obtain polyamide compound；Mixed mode can be selected voluntarily according to the actual situation, be not particularly limited herein, for example, can benefit
Mixed at high speed is carried out with high-speed mixer.
(3), by the polyamide compound from the throat-fed for being kneaded injection molding machine, by the modified carbon fiber in surface from side
Material mouth charging, so that the carbon fiber that the polyamide compound and the surface are modified is mixed to get in the mixing injection molding machine
Carbon fiber reinforced polyamide composite material under molten condition.Specifically, by polyamide compound be placed in be kneaded injection molding machine into
The accurate weightlessness of material mouth deserves to be called, and the modified carbon fiber in surface is transported in screw rod by conveyance conduit from side material mouth, respectively
The feed rate of polyamide compound and carbon fiber is controlled, so that weight percent of the carbon fiber of surface modification in total raw material
It is 20%~60%.That is the charging rate of the modified carbon fiber of control polyamide compound and surface, so that finally obtained carbon
In fibre-reinforced polyamide composite material, the weight percent of each component are as follows: polyamide 28.2%~79.2%, silane coupling agent
0.4%~0.8%, compatilizer 0%~10%, antioxidant 0.4%~1%, the modified carbon fiber 20%~60% in surface.
It is kneaded that injection molding machine includes melting zone (feed inlet to the region between the material mouth of side), (side material mouth is to being molded area for mixed zone
Between region) and injection molding area, polyamide compound melts at a high temperature of melting zone and obtains the polyamide compound of molten state,
And be advanced into mixed zone through screw rod, the polyamide compound of molten state mixed zone and carbon fiber after mixing, through screw rod
It pushes and reaches injection molding area (such as getting to know).In the polyamide compound and carbon fiber mixed process of molten state, temperature is higher, polyamides
The viscosity of amine blends is smaller, smaller to the shear action of carbon fiber, so that carbon fiber is able to maintain biggish length
Degree, meanwhile, if temperature is excessively high, and biggish aging effect can be caused to the sizing agent of polyamide and carbon fiber surface.Therefore,
Preferably, the temperature of the resin melting area and fiber mixing zone is (T0+ 40 DEG C)~(T0+ 70 DEG C), the temperature in the injection molding area
For (T0+ 30 DEG C)~(T0+ 50 DEG C), wherein T0Indicate the fusing point of the polyamide.The temperature range both mixed polyamide
Object has lesser viscosity, while the temperature range is smaller to the aging effect of the sizing agent of polyamide and carbon fiber surface.For example,
When the polyamide is PA6, the temperature of the resin melting area and fiber mixing zone is 260 DEG C~290 DEG C, the injection molding area
Temperature be 250 DEG C~270 DEG C.
Further, the polyamide compound of molten state and the mixed effect of carbon fiber are also influenced by screw speed, spiral shell
The revolving speed of bar is too low, may cause polyamide compound and carbon fiber mixing is uneven, and the revolving speed of screw rod is excessively high then can be to carbon
Fiber causes biggish shear action, causes the length of carbon fiber lower.In the embodiment of the present invention, the spiral shell for being kneaded injection molding machine
Bar revolving speed may be configured as 30RPM~100RPM, which can either guarantee that polyamide compound and carbon fiber can mix
Uniformly, again lower to the shear action of carbon fiber, carbon fiber can be made to keep biggish length.Preferably, the mixing injection molding
The screw speed of machine is set as 50RPM~75RPM.
(4), after the carbon fiber mixing that polyamide compound and surface are modified, by the composite material direct injection of molten condition
Into mold, cooling obtains carbon fiber reinforced polyamide composite material product.Preferably, using 3bar~10bar's when injection molding
Back pressure, mold temperature are set as 70 DEG C~100 DEG C, pressure maintaining 3s~5s, cooling 40s~50s.After injection moulding machine mould open, core pulling is retracted,
Eject product.It is to be appreciated that the product can be any one can be by the system of injection molding preparation in the embodiment of the present invention
Product, such as the bumper or turntable etc. of automobile, are not particularly limited, the mold is then corresponding mold herein.
In the present invention, the modified carbon fiber in surface is handled to obtain by carbon fiber by thermoplasticity starching, to increase carbon fiber
The compatibility on surface and polyamide substrate.Silane coupling agent and compatilizer be added to further increase carbon fiber surface and
The compatibility of polyamide substrate improves between polyamide and carbon fiber so that polyamide can be good at infiltrating carbon fiber
Shear strength.
In the prior art, first polyamide compound and carbon fiber are mixed with to obtain carbon fiber reinforced polyamide composite wood
Expect and be granulated, then carbon fiber reinforced polyamide composite material is melted to injection molding again and obtain carbon fiber reinforced polyamide composite wood
Material products, carbon fiber can be caused further to destroy by melting injection moulding process again, so that carbon fiber length be caused to lose；The present invention
The composite material of melting is directly molded and obtains carbon fiber reinforced polyamide composite material product, avoids and is melted again to carbon fiber
Bring loss of length is tieed up, so that the carbon fiber in the carbon fiber reinforced polyamide composite material product being prepared possesses
Biggish length.
The material for the carbon fiber reinforced polyamide composite material product being prepared according to above scheme includes following weight
The component of percentage: polyamide 28.2%~79.2%, the modified carbon fiber 20%~60% in surface, silane coupling agent 0.4%
~0.8%, compatilizer 0%~10%, antioxidant 0.4%~1%, the carbon fiber reinforced polyamide composite material product passes through
Mixed once is molded to obtain.
Preferably, the material of the carbon fiber reinforced polyamide composite material product includes the group of following weight percentage
Point: polyamide 40.7%~78.2%, the modified carbon fiber 20%~50% in surface, silane coupling agent 0.5%~0.8%, phase
Hold agent 0%~8%, antioxidant 0.6%~1%.
Preferably, the modified carbon fiber in the surface handles to obtain by thermoplasticity sizing agent.
Preferably, the compatilizer includes high-density polycthylene grafted maleic anhydride, polypropylene grafted maleic anhydride and gathers
At least one of styrene-grafted maleic anhydride.Preferably, the compatilizer is high-density polycthylene grafted maleic anhydride.
Preferably, the melt index of the polyamide is greater than or equal to 15g/10min.
Preferably, the melt index of the polyamide is greater than or equal to 20g/10min.
Preferably, the antioxidant includes three [2.4- di-tert-butyl-phenyl] phosphite esters, four [β-(3,5- di-t-butyls-
4- hydroxy phenyl) propionic acid] pentaerythritol ester and N, N'- it is bis--(3- (3,5- di-tert-butyl-hydroxy phenyl) propiono) hexamethylene diamine
At least one of.
Performance detection:
(1), it utilizes the carbon fiber length in ablation detection carbon fiber reinforced polyamide composite material product: taking and be prepared into
The carbon fiber reinforced polyamide composite material product arrived removes polyamide compound by ablation, measures and count carbon fiber
Length.
(2), the drawing of carbon fiber reinforced polyamide composite material product is detected according to the regulation of ISO527 and ISO178 respectively
Stretch performance and bending property.
Embodiment 1
By PA6 at 100 DEG C drying and processing 4h, weigh following raw materials: PA6:65.8% according to following weight percent,
Gamma-aminopropyl-triethoxy-silane (KH550): 0.6%, HDPE-g-MAH:3%, irgasfos 168: 0.3%, antioxidant 1010:
0.3%.
By weighed PA6, KH550, HDPE-g-MA, irgasfos 168 and antioxidant 1010 mixed at high speed obtain polyamide and mix
Close object 1.
Polyamide compound 1 is placed in and is kneaded the carbon that the accurate weightlessness of injection molding machine inlet deserves to be called, and surface is modified
Fiber is transported in screw rod by conveyance conduit from side material mouth, controls the feed rate of polyamide compound 1 and carbon fiber respectively,
So that weight percent of the carbon fiber of surface modification in total raw material is 30%.Be arranged be kneaded injection molding machine resin melting area and
The temperature of fiber mixing zone is 270 DEG C, and the temperature for being molded area is 265 DEG C, sets the screw speed for being kneaded injection molding machine to
75RPM, so that the carbon fiber that polyamide compound 1 and surface are modified is uniformly mixed and obtains the composite material 1 of molten condition.
Using the back pressure of 5bar, the composite material 1 of molten condition is injected directly into mold, mold temperature is set as 80
DEG C, pressure maintaining 3s, cooling 50s obtains carbon fiber reinforced polyamide composite material product 1.
The material for the carbon fiber reinforced polyamide composite material product 1 that the present embodiment is prepared includes following weight percentage
The component of ratio: PA6:65.8%, gamma-aminopropyl-triethoxy-silane (KH550): 0.6%, HDPE-g-MAH:3%, antioxidant
168:0.3%, antioxidant 1010: 0.3%, the modified carbon fiber in surface: 30%.
Performance test:
(1), ablation detects to obtain the average length of the carbon fiber in carbon fiber reinforced polyamide composite material product 1 and is
1.92mm。
(2), according to the regulation of ISO527 and ISO178, respectively to the (name of carbon fiber reinforced polyamide composite material product 1
It is novel for PA 6/30CF), based on by weight percent being 70% under first extruding pelletization again second melting injection molding process
The carbon fiber reinforced polyamide composite material product that polyamide 6 mixture and weight percent are 30% (is named as PA6/30CF
Tradition) and weight percent be 70% polyamide 6 mixture and weight percent be 30% glass fibre increase polyamide answer
Laminate article (being named as PA6/30GF) is tested for the property, as a result as shown in the table.
| Serial number | Detection project | Unit | PA6/30GF | PA6/30CF tradition | PA6/30CF is novel | Detect foundation |
| 1 | Tensile strength | MPa | 176 | 210 | 235 | ISO 527 |
| 2 | Stretch modulus | GPa | 8.52 | 20 | 25.1 | ISO 527 |
| 3 | Bending strength | MPa | 245 | 286 | 315 | ISO 178 |
| 4 | Bending modulus | GPa | 7.02 | 16.5 | 21.2 | ISO 178 |
By upper table it can be concluded that, the 1 (PA6/ of carbon fiber reinforced polyamide composite material product that the present embodiment is prepared
30CF is novel) compared with PA6/30GF and PA6/30CF tradition, tensile strength, stretch modulus, bending strength and bending modulus are equal
It significantly improves.This is mainly due to the mechanical property of glass fibre is poor, glass fiber-reinforced polyamide composite material product
(PA6/30GF) mechanical property is not high.And based on the carbon being prepared under first extruding pelletization again second melting injection molding process
Fibre-reinforced polyamide composite product (PA6/30CF tradition) due to second melting injection moulding process carbon fiber can be caused into
One step is destroyed, so that carbon fiber length is caused to lose, it is poor so as to cause reinforcing effect.The carbon fiber that the present embodiment is prepared
Reinforced polyamide composite product 1 (it is novel to be named as PA 6/30CF), due to being directly to be molded the composite material of melting
It arrives, avoids second melting injection molding to carbon fiber bring loss of length, so that the fibre reinforced polyamides being prepared
Carbon fiber in amine composite product possesses biggish length, so that reinforcing effect is preferable.
Embodiment 2
By PA66 at 110 DEG C drying and processing 3h, weigh following raw materials: PA66:79.2% according to following weight percent,
KH550:0.4%, irgasfos 168: 0.4%.
By weighed PA66, KH550,1098 mixed at high speed of antioxidant obtains polyamide compound 2.
Polyamide compound 2 is placed in and is kneaded the carbon that the accurate weightlessness of injection molding machine inlet deserves to be called, and surface is modified
Fiber is transported in screw rod by conveyance conduit from side material mouth, controls the feed rate of polyamide compound 2 and carbon fiber respectively,
So that weight percent of the carbon fiber of surface modification in total raw material is 20%.Be arranged be kneaded injection molding machine resin melting area and
The temperature of fiber mixing zone is 300 DEG C, and the temperature for being molded area is 290 DEG C, sets the screw speed for being kneaded injection molding machine to
40RPM, so that the carbon fiber that polyamide compound 2 and surface are modified is uniformly mixed and obtains the composite material 2 of molten condition.
Using the back pressure of 5bar, the composite material 2 of molten condition is injected directly into mold, mold temperature is set as 90
DEG C, pressure maintaining 4s, cooling 40s obtains carbon fiber reinforced polyamide composite material product 2.The carbon fiber that the present embodiment is prepared increases
The material of strong polyamide composite article 2 includes the component of following weight percentage: PA66:79.2%, KH550:0.4%,
Irgasfos 168: 0.4%, the modified carbon fiber 20% in surface.
Performance test:
(1), ablation detects to obtain the average length of the carbon fiber in carbon fiber reinforced polyamide composite material product 2 and is
1.95mm。
(2), according to the regulation of ISO527 and ISO178, respectively to carbon fiber reinforced polyamide composite material product 2 and base
The PA66 mixture and weight hundred by weight percent for 80% under first extruding pelletization again second melting injection molding process
Divide to compare and is for 20% carbon fiber reinforced polyamide composite material product (being named as PA66/20CF tradition) and weight percent
The glass fibre that 80% PA66 mixture and weight percent is 20% increases polyamide composite article and (is named as PA66/
It 20GF) is tested for the property, the carbon fiber reinforced polyamide composite material product 2 that the present embodiment is prepared as the result is shown
(PA66/20CF is novel) compared with PA66/20GF and PA66/20CF tradition, tensile strength, stretch modulus, bending strength and curved
Bent modulus significantly improves.
Embodiment 3
By PA6 at 100 DEG C drying and processing 4h, weigh following raw materials: PA6:78.2% according to following weight percent,
KH550:0.8%, antioxidant 1098:1%.
By weighed PA6, KH550,1098 mixed at high speed of antioxidant obtains polyamide compound 3.
Polyamide compound 3 is placed in and is kneaded the carbon that the accurate weightlessness of injection molding machine inlet deserves to be called, and surface is modified
Fiber is transported in screw rod by conveyance conduit from side material mouth, controls the feed rate of polyamide compound 3 and carbon fiber respectively,
So that weight percent of the carbon fiber of surface modification in total raw material is 20%.Be arranged be kneaded injection molding machine resin melting area and
The temperature of fiber mixing zone is 260 DEG C, and the temperature for being molded area is 260 DEG C, sets the screw speed for being kneaded injection molding machine to
50RPM, so that the carbon fiber that polyamide compound 3 and surface are modified is uniformly mixed and obtains the composite material 3 of molten condition.
Using the back pressure of 5bar, the composite material 3 of molten condition is injected directly into mold, mold temperature is set as 70
DEG C, pressure maintaining 3s, cooling 40s obtains carbon fiber reinforced polyamide composite material product 3.
The material for the carbon fiber reinforced polyamide composite material product 3 that the present embodiment is prepared includes following weight percentage
The component of ratio: PA6:78.2%, KH550:0.8%, antioxidant 1098:1%, the modified carbon fiber 20% in surface.
Performance test:
(1), ablation detects to obtain the average length of the carbon fiber in carbon fiber reinforced polyamide composite material product 3 and is
1.91mm。
(2), according to the regulation of ISO527 and ISO178, respectively to the (name of carbon fiber reinforced polyamide composite material product 3
It is novel for PA 6/20CF), based on by weight percent being 80% under first extruding pelletization again second melting injection molding process
The carbon fiber reinforced polyamide composite material product that polyamide 6 mixture and weight percent are 20% (is named as PA6/20CF
Tradition) and weight percent be 80% polyamide 6 mixture and weight percent be 20% glass fibre increase polyamide answer
Laminate article (being named as PA6/20GF) is tested for the property, and the fibre reinforced that the present embodiment is prepared as the result is shown is poly-
Amide composite product 3 (PA6/20CF is novel) is compared with PA6/20GF and PA6/20CF tradition, tensile strength, stretching die
Amount, bending strength and bending modulus significantly improve.
Embodiment 4
By PA6 at 80 DEG C drying and processing 5h, weigh following raw materials: PA6:52.6% according to following weight percent,
KH550:0.7%, PS-g-MAH:6%, antioxidant 1010: 0.7%.
By weighed PA6, KH550,1098 mixed at high speed of antioxidant obtains polyamide compound 4.
Polyamide compound 4 is placed in and is kneaded the carbon that the accurate weightlessness of injection molding machine inlet deserves to be called, and surface is modified
Fiber is transported in screw rod by conveyance conduit from side material mouth, controls the feed rate of polyamide compound 4 and carbon fiber respectively,
So that weight percent of the carbon fiber of surface modification in total raw material is 40%.Be arranged be kneaded injection molding machine resin melting area and
The temperature of fiber mixing zone is 270 DEG C, and the temperature for being molded area is 265 DEG C, sets the screw speed for being kneaded injection molding machine to
60RPM, so that the carbon fiber that polyamide compound 4 and surface are modified is uniformly mixed and obtains the composite material 4 of molten condition.
Using the back pressure of 8bar, the composite material 4 of molten condition is injected directly into mold, mold temperature is set as 95
DEG C, pressure maintaining 4s, cooling 55s obtains carbon fiber reinforced polyamide composite material product 4.
The material for the carbon fiber reinforced polyamide composite material product 4 that the present embodiment is prepared includes following weight percentage
The component of ratio: PA6:52.6%, KH550:0.7%, PS-g-MAH:6%, antioxidant 1010: 0.7%, the modified carbon fiber in surface
Dimension 40%.
Performance test:
(1), ablation detects to obtain the average length of the carbon fiber in carbon fiber reinforced polyamide composite material product 4 and is
2.03mm。
(2), according to the regulation of ISO527 and ISO178, respectively to the (name of carbon fiber reinforced polyamide composite material product 4
It is novel for PA 6/40CF), based on by weight percent being 60% under first extruding pelletization again second melting injection molding process
The carbon fiber reinforced polyamide composite material product that polyamide 6 mixture and weight percent are 40% (is named as PA6/40CF
Tradition) and weight percent be 60% polyamide 6 mixture and weight percent be 40% glass fibre increase polyamide answer
Laminate article (being named as PA6/40GF) is tested for the property, and the fibre reinforced that the present embodiment is prepared as the result is shown is poly-
Amide composite product 4 (PA6/40CF is novel) is compared with PA6/40GF and PA6/40CF tradition, tensile strength, stretching die
Amount, bending strength and bending modulus significantly improve.
Embodiment 5
By PA6 at 85 DEG C drying and processing 5h, weigh following raw materials: PA6:40.7% according to following weight percent,
KH550:0.5%, PP-g-MAH:8%, irgasfos 168: 0.3%, antioxidant 1098:0.5%.
By weighed PA6, KH550,1098 mixed at high speed of antioxidant obtains polyamide compound 5.
Polyamide compound 5 is placed in and is kneaded the carbon that the accurate weightlessness of injection molding machine inlet deserves to be called, and surface is modified
Fiber is transported in screw rod by conveyance conduit from side material mouth, controls the feed rate of polyamide compound 5 and carbon fiber respectively,
So that weight percent of the carbon fiber of surface modification in total raw material is 50%.Be arranged be kneaded injection molding machine resin melting area and
The temperature of fiber mixing zone is 280 DEG C, and the temperature for being molded area is 270 DEG C, sets the screw speed for being kneaded injection molding machine to
30RPM, so that the carbon fiber that polyamide compound 5 and surface are modified is uniformly mixed and obtains the composite material 5 of molten condition.
Using the back pressure of 5bar, the composite material 5 of molten condition is injected directly into mold, mold temperature is set as
100 DEG C, pressure maintaining 5s, cooling 60s obtains carbon fiber reinforced polyamide composite material product 5.
The material for the carbon fiber reinforced polyamide composite material product 5 that the present embodiment is prepared includes following weight percentage
The component of ratio: PA6:40.7%, KH550:0.5%, PP-g-MAH:8%, irgasfos 168: 0.3%, antioxidant 1098:
0.5%, the modified carbon fiber 50% in surface.
Performance test:
(1), ablation detects to obtain the average length of the carbon fiber in carbon fiber reinforced polyamide composite material product 5 and is
2.17mm。
(2), according to the regulation of ISO527 and ISO178, respectively to the (name of carbon fiber reinforced polyamide composite material product 5
It is novel for PA 6/50CF), based on by weight percent being 50% under first extruding pelletization again second melting injection molding process
The carbon fiber reinforced polyamide composite material product that polyamide 6 mixture and weight percent are 50% (is named as PA6/50CF
Tradition) and weight percent be 50% polyamide 6 mixture and weight percent be 50% glass fibre increase polyamide answer
Laminate article (being named as PA6/50GF) is tested for the property, and the fibre reinforced that the present embodiment is prepared as the result is shown is poly-
Amide composite product 5 (PA6/50CF is novel) is compared with PA6/50GF and PA6/50CF tradition, tensile strength, stretching die
Amount, bending strength and bending modulus significantly improve.
Embodiment 6
By PA6 at 100 DEG C drying and processing 4h, weigh following raw materials: PA6:33.2% according to following weight percent,
KH550:0.4%, HDPE-g-MAH:6%, irgasfos 168: 0.2%, antioxidant 1010: 0.2%.
By weighed PA6, KH550,1098 mixed at high speed of antioxidant obtains polyamide compound 6.
Polyamide compound 6 is placed in and is kneaded the carbon that the accurate weightlessness of injection molding machine inlet deserves to be called, and surface is modified
Fiber is transported in screw rod by conveyance conduit from side material mouth, controls the feed rate of polyamide compound 6 and carbon fiber respectively,
So that weight percent of the carbon fiber of surface modification in total raw material is 60%.Be arranged be kneaded injection molding machine resin melting area and
The temperature of fiber mixing zone is 290 DEG C, and the temperature for being molded area is 275 DEG C, sets the screw speed for being kneaded injection molding machine to
75RPM, so that the carbon fiber that polyamide compound 6 and surface are modified is uniformly mixed and obtains the composite material 6 of molten condition.
Using the back pressure of 10bar, the composite material 6 of molten condition is injected directly into mold, mold temperature is set as
85 DEG C, pressure maintaining 4s, cooling 45s obtains carbon fiber reinforced polyamide composite material product 6.
The material for the carbon fiber reinforced polyamide composite material product 6 that the present embodiment is prepared includes following weight percentage
The component of ratio: PA6:33.2%, KH550:0.4%, HDPE-g-MAH:6%, irgasfos 168: 0.2%, antioxidant 1010:
0.2%, the modified carbon fiber 60% in surface.
Performance test:
(1), ablation detects to obtain the average length of the carbon fiber in carbon fiber reinforced polyamide composite material product 6 and is
2.21mm。
(2), according to the regulation of ISO527 and ISO178, respectively to the (name of carbon fiber reinforced polyamide composite material product 6
It is novel for PA 6/60CF), based on by weight percent being 40% under first extruding pelletization again second melting injection molding process
The carbon fiber reinforced polyamide composite material product that polyamide 6 mixture and weight percent are 60% (is named as PA6/60CF
Tradition) and weight percent be 40% polyamide 6 mixture and weight percent be 60% glass fibre increase polyamide answer
Laminate article (being named as PA6/60GF) is tested for the property, and the fibre reinforced that the present embodiment is prepared as the result is shown is poly-
Amide composite product 6 (PA6/60CF is novel) is compared with PA6/60GF and PA6/60CF tradition, tensile strength, stretching die
Amount, bending strength and bending modulus significantly improve.
Embodiment 7
By PA6 at 90 DEG C drying and processing 4.5h, weigh following raw materials: PA6:28.2% according to following weight percent,
KH550:0.8%, HDPE-g-MAH:5%, PS-g-MAH:5%, antioxidant 1098:0.5%, antioxidant 1010: 0.5%.
By weighed PA6, KH550,1098 mixed at high speed of antioxidant obtains polyamide compound 7.
Polyamide compound 7 is placed in and is kneaded the carbon that the accurate weightlessness of injection molding machine inlet deserves to be called, and surface is modified
Fiber is transported in screw rod by conveyance conduit from side material mouth, controls the feed rate of polyamide compound 7 and carbon fiber respectively,
So that weight percent of the carbon fiber of surface modification in total raw material is 60%.Be arranged be kneaded injection molding machine resin melting area and
The temperature of fiber mixing zone is 260 DEG C, and the temperature for being molded area is 250 DEG C, sets the screw speed for being kneaded injection molding machine to
100RPM, so that the carbon fiber that polyamide compound 7 and surface are modified is uniformly mixed and obtains the composite material 7 of molten condition.
Using the back pressure of 8bar, the composite material 7 of molten condition is injected directly into mold, mold temperature is set as 85
DEG C, pressure maintaining 4s, cooling 45s obtains carbon fiber reinforced polyamide composite material product 7.
The material for the carbon fiber reinforced polyamide composite material product that the present embodiment is prepared includes following weight percentage
The component PA6:28.2%, KH550:0.8%, HDPE-g-MAH:5%, PS-g-MAH:5% of ratio, antioxidant 1098:0.5%,
Antioxidant 1010: 0.5%, the modified carbon fiber 60% in surface.
Performance test:
(1), ablation detects to obtain the average length of the carbon fiber in carbon fiber reinforced polyamide composite material product 7 and is
1.52mm。
(2), according to the regulation of ISO527 and ISO178, respectively to the (name of carbon fiber reinforced polyamide composite material product 7
It is novel for PA 6/60CF), based on by weight percent being 40% under first extruding pelletization again second melting injection molding process
The carbon fiber reinforced polyamide composite material product that polyamide 6 mixture and weight percent are 60% (is named as PA6/60CF
Tradition) and weight percent be 40% polyamide 6 mixture and weight percent be 60% glass fibre increase polyamide answer
Laminate article (being named as PA6/60GF) is tested for the property, and the fibre reinforced that the present embodiment is prepared as the result is shown is poly-
Amide composite product 7 (PA6/60CF is novel) is compared with PA6/60GF and PA6/60CF tradition, tensile strength, stretching die
Amount, bending strength and bending modulus significantly improve.
As can be seen from the above results, the carbon fiber reinforced polyamide composite wood that any embodiment obtains in embodiment 1-7
Carbon fiber length in material products is within the scope of 1.52mm~2.21mm, and much larger than existing first extruding pelletization, second melting is infused again
The carbon fiber length (about 0.4mm) in carbon fiber reinforced polyamide composite material product being prepared under modeling moulding process.And
The tensile strength for the carbon fiber reinforced polyamide composite material product that any embodiment is prepared in embodiment 1-7, stretching die
Amount, bending strength and bending modulus are both with respect to traditional first extruding pelletization second melting injection molding process and glass fibers again
The composite product of dimension composition is significantly improved.It is surface by thermoplastic this is mainly due to the carbon fiber that the present invention uses
Property starching processing carbon fiber, have preferable compatibility with polyamide substrate, silane coupling agent and compatilizer are added to one
Step increases the compatibility of surface modified carbon fiber and polyamide substrate, so that polyamide can be good at infiltrating carbon fiber
Dimension, the shearing between polyamide and carbon fiber are slightly higher；Further, the fibre reinforced that the embodiment of the present invention is prepared
The length of carbon fiber is larger in polyamide composite article, and biggish fibre length enables to carbon fiber and polyamide substrate
Surface has stronger bonding strength, and carbon fiber is not easy to deviate from from polyamide substrate, and carbon fiber can play preferable enhancing
Effect.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the system that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or system.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent article or equivalent process transformation made by bright description are applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (10)
1. a kind of carbon fiber reinforced polyamide composite material product, which is characterized in that the carbon fiber reinforced polyamide composite wood
The material of material products includes the component of following weight percentage: polyamide 28.2%~79.2%, the modified carbon fiber in surface
20%~60%, silane coupling agent 0.4%~0.8%, compatilizer 0%~10%, antioxidant 0.4%~1%, the carbon fiber
Reinforced polyamide composite product is molded to obtain by mixed once.
2. carbon fiber reinforced polyamide composite material product as described in claim 1, which is characterized in that the fibre reinforced
The material of polyamide composite article includes the component of following weight percentage: polyamide 40.7%~78.2%, surface changes
The carbon fiber 20%~50% of property, silane coupling agent 0.5%~0.8%, compatilizer 0%~8%, antioxidant 0.6%~1%.
3. carbon fiber reinforced polyamide composite material product as claimed in claim 1 or 2, which is characterized in that the surface changes
The carbon fiber of property handles to obtain by thermoplasticity sizing agent.
4. carbon fiber reinforced polyamide composite material product as claimed in claim 1 or 2, which is characterized in that the compatilizer
Including in high-density polycthylene grafted maleic anhydride, polypropylene grafted maleic anhydride and polystyrene graft maleic anhydride at least
It is a kind of.
5. carbon fiber reinforced polyamide composite material product as claimed in claim 1 or 2, which is characterized in that the polyamide
Melt index be greater than or equal to 15g/10min.
6. a kind of preparation method of carbon fiber reinforced polyamide composite material product, which is characterized in that the fibre reinforced is poly-
The preparation method of amide composite product includes:
Following raw materials: polyamide 28.2%~79.2% are weighed according to following weight percent, silane coupling agent 0.4%~
0.8%, compatilizer 0%~10%, antioxidant 0.4%~1%；
By the weighed polyamide, the silane coupling agent, the compatilizer and the antioxidant are uniformly mixed and obtain polyamides
Amine blends；
By the polyamide compound from the throat-fed for being kneaded injection molding machine, by the modified carbon fiber in surface from side material mouth into
Material, so that the carbon fiber that the polyamide compound and the surface are modified is mixed to get molten in the mixing injection molding machine
Carbon fiber reinforced polyamide composite material under state, wherein control the carbon fiber of the polyamide compound and surface modification
The feed rate of dimension, weight percent 20%~60% of the carbon fiber for keeping surface modified in total raw material；
The carbon fiber reinforced polyamide composite material under molten condition in mixing injection molding machine is injected into mold, cooling
To carbon fiber reinforced polyamide composite material product.
7. the preparation method of carbon fiber reinforced polyamide composite material product as claimed in claim 6, which is characterized in that described
Being kneaded injection molding machine includes resin melting area, fiber mixing zone and injection molding area, the temperature in the resin melting area and fiber mixing zone
For (T0+ 40 DEG C)~(T0+ 70 DEG C), the temperature in the injection molding area is (T0+ 30 DEG C)~(T0+ 50 DEG C), wherein T0Indicate described poly-
The fusing point of amide.
8. the preparation method of carbon fiber reinforced polyamide composite material product as claimed in claim 6, which is characterized in that described
The screw speed for being kneaded injection molding machine is 30RPM~100RPM.
9. the preparation method of carbon fiber reinforced polyamide composite material product as claimed in claim 6, which is characterized in that described
Polyamide drying and processing 3h~5h at 80 DEG C~110 DEG C before weighing.
10. the preparation method of the carbon fiber reinforced polyamide composite material product as described in any one of claim 6~9,
It is characterized in that, the compatilizer includes high-density polycthylene grafted maleic anhydride, polypropylene grafted maleic anhydride and polystyrene
The melt index of at least one of grafted maleic anhydride, the polyamide is greater than or equal to 15g/10min.
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