CN1699474A - Assorted and reinforced high-performance composites for bearing and their preparation method and use - Google Patents
Assorted and reinforced high-performance composites for bearing and their preparation method and use Download PDFInfo
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Abstract
The invention relates to assorted and reinforced high-performance composites for bearing and their preparation method and use, wherein the composite material comprises chopped carbon fiber, PPTA-pulp, packing material and fire resistant resin, wherein the weight ratio of the chopped carbon fiber, PPTA-pulp, packing material and fire resistant resin is 0-40 : 5-50 : 0- 55 : 30-85, when the weight ratio of the chopped carbon fiber is 0, the weight ratio of the PPTA-pulp, packing material and fire resistant resin is 5-50 : 5-55 : 30-85. The fire resistant resin has a heat distortion temperature above 260 deg. C.
Description
Affiliated field:
The present invention relates to a kind of matrix material, specifically a kind of staple fibre mixes enhancing high performance composite and its manufacture method and application thereof.
Background technology:
Carbon fiber and aramid fiber are high performance composite two kinds of fibers commonly used, they all have the intensity height, advantage such as high temperature resistant, but ppta-pulp fibre has bigger specific surface area than carbon fiber, better toughness and shock-resistant ability, strong with the matrix resin bonding force, good enhancing toughening effect is arranged; And carbon fiber has high modulus, and character is firm, and graphited structure makes it have the solid lubricant function, be a kind of high-abrasive material of excellence, carbon fiber has heat conduction, conductivity again, thermal expansivity is little, and the matrix material dimensional stability made from it is good, after above two kinds of full and uniform mixing of fiber, make a kind of high performance composite, promptly have wear-resistingly, high temperature resistant, conduct heat, conduction, the engineering materials of excellent performance.
Mechanically used sliding surface bearing has metal and plastics two classes, and the ratio of metal powder metallurgy bearing is great, and the weight ratio plastics are heavy, and oil absorptiveness, lubricity, and corrosion resistance nature is not as good as plastic bearing.Plastic bearing is lighter than sintered metal powder bearing, and frictional coefficient is little, wears away little, but the plastic bearing thermal conductivity is little, cause heat of friction to gather and make the bearing temperature rising easily, and the heat-drawn wire of plastics is low, poor dimensional stability, this has just limited it in high precision, the application under the high rotating speed working condition.In addition, also have a kind of graphite bearing of special purpose, undesirable because of toughener, mechanical property, wear resistance is not good enough, the specific admixture reinforced composite that the present invention system invents at above-mentioned application background.
At present, utilize aramid pulp to make the existing patent report of automobile brake sheet, patent is also arranged, mix enhancing with both staple fibres and do not see the patent report as yet with the fine high-abrasive material of making of carbon.
Summary of the invention
The purpose of this invention is to provide and mix reinforced composite.Specifically a kind of ppta-pulp fibre or and carbon fiber hybrid enhancing high performance composite.
Purpose of the present invention also provides a kind of above-mentioned ppta-pulp fibre or and carbon fiber hybrid enhancing high performance composite manufacture method.
Another object of the present invention provide above-mentioned ppta-pulp fibre or and carbon fiber hybrid strengthen the application of high performance composite.The frame bearing of operating mode under high speed light loading particularly, motor bearings, the application in graphite bearing field.
The present invention be with ppta-pulp fibre or and one or both high-performance fibers of carbon fiber mix the enhancing fire resistant resin, make the high-abrasive material under a kind of suitable high speed light loading working conditions, and conductive plastics, stephanoporate oil-retaining bearing, the material of multiple excellent properties such as enhancing electrically conductive graphite bearing proprietary material.To satisfy the needs of electromechanical industries high speed.
Carbon fiber and aramid pulp are two kinds of high-performance fibers, but performance is each has something to recommend him, by between them with certain proportioning uniform mixing, have complementary advantages, make a specific admixture reinforced composite together with fire resistant resin.The matrix material of this many components, the selected of its constituent is to be foundation with product performance.Matrix material of the present invention, its performance characteristics is wear-resisting, and is high temperature resistant, conducts heat, and conduction has high dimensional stability, and its weave construction designs according to following principle.
1, contain the fortifying fibre of two or more different performances in the constituent, it strengthens system with the network that matrix resin forms mutual supplement with each other's advantages together; Guarantee the intensity of material, hardness in the time of mechanical propertys such as toughness, is also composed with other required physicals of material, as heat conduction, and conductivity;
2, matrix resin is a fire resistant resin, the high temperature that the high what of matrix material ability that it is formed with high-performance fiber is 200 ℃, and heat-drawn wire is up to 260 ℃; Eliminated the frictional heating temperature to a great extent and raise, as material deliquescing, dimensional change or the like to the negative impact of material band fork-like farm tool used in ancient China;
3, can contain a considerable amount of solid lubricants in this constituent, can reduce with frictional coefficient the mill thing;
4, this matrix material and plastics difference are at what, internal structure is guaranteeing also have certain porosity under the required condition of strong rigidity, add fortifying fibre and filler itself and have adsorptivity preferably again, therefore can absorb a considerable amount of lubricating oil, and can keep over a long time, friction environment is remained under the good lubricating condition;
5, this matrix material has high dimensional stability, and its geometrical dimension does not change with the temperature humidity of Working environment.
According to above-mentioned principle of design, ppta-pulp fibre of the present invention or and carbon fiber hybrid strengthen high performance composite and form by following substances: chopped carbon fiber, ppta-pulp fibre, filler and fire resistant resin.The weight ratio of described chopped carbon fiber, ppta-pulp fibre, filler and fire resistant resin is respectively 0-40: 5-50: 0-55: 30-85.Recommend weight ratio to be respectively 5-40: 5-40: 5-30: 30-85.Wherein, when the chopped carbon fiber weight ratio was 0, the weight ratio of ppta-pulp fibre, filler and fire resistant resin was that filler weight is than being 5-50: 5-55: 30-85.When not filled, the weight ratio of described chopped carbon fiber, ppta-pulp fibre and fire resistant resin is respectively 0-20: 5-40: 35-85; Recommend weight ratio to be respectively 3-14: 7-36: 35-85.Described fire resistant resin is thermoset and thermoplastic resin.
More typical constituent is as shown in table 1:
Table 1 material composite
| Numbering | Title | Specification | Weight percentage | The component function |
| A | Chopped carbon fiber | 0.5-5mm | 5-40％ | Strengthen, antifriction increases dimensional stability, heat conduction, oil suction |
| B | Ppta-pulp fibre | 0.5-3mm | 5--40％ | Strengthen, toughness reinforcing, antifriction increases dimensional stability, oil suction |
| C | Graphite Powder 99 | The 400-1200 order | 5-30％ | The antifriction conduction, the heat conduction oil suction |
| D | The tetrafluoroethylene powder | 40-200μm | 0---8％ | Antifriction |
| E | Fire resistant resin | Technical grade | 30-85％ | Matrix resin |
The manufacture method flow process that mixes reinforced composite of the present invention is as shown in Figure 1:
The reinforced composite that mixes of the present invention can pass through following (1) and (2), (1)-(2) and (3), and (1)-(2) and (4) three kinds of methods make:
(1), ppta-pulp fibre or and through oxidation come unstuck chopped carbon fiber mixing in mixing tank, oven dry, shredding, dispersion;
(2), filler and fire resistant resin are mixed mixing in levigate back adding (1) described product, shredding; Or
(3), the product of (2), compression molding; Compression molding pressure 5-12MPa, mold temperature 170--220 ℃.Through or in the vacuum still immersion lubrication oil; Or
(4), the product of (2) is made master batch, injection moulding.
The weight ratio of above-mentioned chopped carbon fiber, ppta-pulp fibre, filler and fire resistant resin as previously mentioned.
Method of the present invention can further describe as follows:
1, the fiber mixture preparation:
Strengthen with two kinds of fiber hybrids, make their performance reach mutual supplement with each other's advantages, two kinds of fiber homodisperse mix very key, and the present invention can reach the homodisperse of individual staple fibers as follows, mixes;
Commercially available carbon fiber is except that special purpose, more or less there is glue on the surface on all in process of production, cause obstacle to homodisperse in the later mixing process, the used carbon fiber of the present invention before use all will be through surface treatment such as coming unstuck for this reason, its method is to come unstuck through oxidation in 3-30 minute in 350--500 ℃ of industrial furnace, is cut into the staple fibre of length 3-5mm then on stapling machine
Aramid pulp system is a raw material with Fanglun l414, and length is 0.5-3mm, and specific surface area is at 6-10m
2/ g
The per-cent weighing that above-mentioned two kinds of starting material at first design by performance need mixes, the ratio of aramid pulp of the present invention and carbon fiber can be regulated arbitrarily. and mixing equipment is the aqueous solution fibre blender (patent is applied for separately) of the transformation of the way, and two kinds of fibers are made compound by the following method;
Carbon fiber and ppta-pulp fibre are put into the mixing tank that fills with pure water simultaneously, the weight of water should be at more than 25 times of total weight of fibers, the principle of this equipment is to utilize under the effect of current and pressure two kinds of fiber homodisperse are opened and mixed, simultaneously under knife section and ledger-plate effect, make the fiber surface roughening again, increase specific surface area, favourable what resin bonding
. to two kinds of fiber dispersion, after the mixing, color and luster is even on the macroscopic view through above-mentioned technology, there is not block fiber to build up, examine under a microscope, originally the carbon fiber of pencil presents the dispersion of single fiber state fully. and illustrate to be uniformly dispersed, mix fully. be that other blending means is unapproachable.
The fiber that mixes after filtration, centrifuge dehydration, the oven dry moisture content. standby.
2, fire resistant resin and filler selection with mix
The fire resistant resin that the present invention adopts has thermoset and thermoplasticity two classes; The thermoset fire resistant resin is mainly used resol and phenolic aldehyde epoxy modified resin, wherein more commonly used with boron bakelite resin again, boron bakelite resin (FB) has more good resistance to elevated temperatures than common resol,. hot analysis revealed does not decompose for 536 ℃ before, therefore selects for use FB can improve heat-drawn wire.
The thermoplasticity fire resistant resin is mainly used polyphenylene sulfide, and its heat-drawn wire is more than 260 ℃, and thermal expansivity is little, and dimensional stability is good. also can adopt fire resistant resins such as polyetherketone, polyimide in addition.
The filler that the present invention adopts mainly is a graphite, also adopt polytetrafluoroethylene (PTFE) in the occasion that can not adopt graphite, fluorine 46 (FEP), molybdenumdisulphide etc. are made low friction compound, the adding method of these two kinds of fillers is to add simultaneously with resin in ball mill or high speed powder mixer, levigate then, blended.
3, the preparation of composite powder
The mixing of various component raw materials is to carry out in the plough shape rotor mixing machine of sealing; Their rotor should be selected the rotor that fiber is had stronger shredding mixing effect for use.
By product performance requirement design each component proportion of raw materials, finish the mixing and the mixing of resin of fiber with filler after. add mixing tank by following order and prepare composite powder
The first step adds fibre blend, fiber opening is disperseed time 5-10 minute;
Second step added mixed powder from charging opening, and the limit edged stirs, and sneaks among the dispersive fiber time 30-60 minute equably;
In the 3rd step, to the compound high-speed stirring, further shredding disperses thorough mixing.
In above-mentioned three steps, the speed of plough shape rotor all can be regulated, and the one or three step rotating speed is at 1000-1500 rev/min; The second step rotating speed is at 120-200 rev/min.
The apparent density of composite powder is the 0.08-0.15 grams per cubic centimter.
Compound should seal to store for compression molding and use. the thermoplasticity fire resistant resin is then further carried out extruding pelletization for use in injection molding.
4, forming process and immersion oil
Those require the fibre content height to what, and the thermoset fire resistant resin composite powder that staple length is long adopts traditional heat-reactive phenolic resin die press technology for forming; Forming pressure 5-12Mpa, mold temperature 170--220 ℃, and fibre content is low, the also available heat solidity screw injection molding machine moulding of thermoset fire resistant resin composite powder that length is short.
What thermoplasticity fire resistant resin composite powder is adopted injection moulding more. the also employing die press technology for forming of minority particular requirement.
For satisfying the requirement of the dimensional precision that runs up, further ground finish after the general moulding.
The wear part that processes should be inserted immersion lubrication oil in the vacuum still.
. the heat-resisting phenolic composite performance that makes with present method is as follows;
Volume density 1.2-1.6g/cm3
Flexural strength 100--210Mpa
Modulus in flexure 10--22Gpa
Notched Izod impact strength 2-14KJ/m
2
Heat-drawn wire 200--220 ℃
Thermal expansivity 2.6-4.1 * 10
-51/ ℃
Thermal conductivity 88-97W/m.k
Frictional coefficient 0.05-0.12
PV value 1-2Mpa m/s
Hole oil absorbency 3-12%
The polyphenyl thioether composite material performance that makes with present method is as follows;
Volume density 1.4-1.6g/cm3
Tensile strength 120--160Mpa
Flexural strength 160-240MPa
Modulus in flexure 16--22Gpa
Socle girder notched Izod impact strength 8-15KJ/m
2
260 ℃ of heat-drawn wires
Thermal expansivity 2.-3.1 * 10
-51/ ℃
Thermal conductivity 1-80W/m.k
Frictional coefficient 0.12-0.18
PV value 2-3Mpa m/s
Hole oil absorbency 0.5-3%
The present invention creates part at what: the technology of 1) having founded a kind of aqueous solution middle short fiber dispersing and mixing, guaranteed the uniform mixing of two or more staple fibres, compare with other blending in of fibers method, except that having improved mixture homogeneity, also reduced dust pollution, 2) established a kind of staple fibre and mixed reinforced composite body system at the raising wear resistance, and working method, its not only available what frame bearing, the preparation that also can use attrition resistant application scenarios such as other high-speed electric expreess locomotive bearing of what and heat-conductivity conducting plastics
Matrix material of the present invention is mainly used in underloading high speed textile manufacturing machine, light industry and machinery, the bearing of high-speed electric expreess locomotive, alternative rolling bearing and sintered metal powder bearing, have use have the life-span long, noise is low,, characteristics such as energy-conservation.
Description of drawings
Fig. 1 is the manufacture method flow process that mixes reinforced composite of the present invention;
Fig. 2 is the Photomicrograph after two kinds of blending in of fibers of different ratios.
Embodiment:
Help to understand the present invention by following embodiment and comparative example, but do not limit content of the present invention.
Embodiment 1: the conductive bearing matrix material
1) gets carbon fiber 100g; Aramid pulp 100g pours mixing machine into after adding 5 kilograms of dispersed with stirring of water, mixes 10 minutes with 200 rev/mins of speed, leaches fiber, centrifuge dehydration, 120 ℃ of dry for standby
2) get boron bakelite resin 320g
3) get Graphite Powder 99 380g dry for standby
4) with 2), 3) resin and Graphite Powder 99 mix levigate in ball mill
5) with 1) fiber shredding in homogenizer, simultaneously evenly add 4) powder made, and continuing shredding and be mixed into the molding powder and use for moulding. it is as follows that this mixes reinforced composite component ratio; The fine 11.1% aramid pulp 11.1%. Graphite Powder 99 42.2% of carbon, boron bakelite resin 35.6%
6) with mould compression molding on dull and stereotyped pressing machine, 200 ℃ of mold temperatures. forming pressure 12MPa
7) with endoporus location grinding external diameter, reach bearing level tolerance of dimension
8) immersion lubrication oil under-0.08Mpa negative pressure of vacuum, 12 hours time.
The porous oil-containing composite bearing performance of making through above-mentioned technology is as follows;
Density 1.602g/cm3
Flexural strength 140Mpa
Modulus in flexure 12.3GPa
Notched Izod impact strength 2.8KJ/m
2
Hole oil absorbency 8.2%
Frictional coefficient 0.11
Thermal conductivity 92W/m.k
Resistance 2 * 10
-2Ω .cm.
Embodiment 2: the different hybrid ratio fiber reinforcement of no filler high temperature ester aldehyde matrix material
1), carbon fiber and ppta-pulp fibre according to the form below ratio are mixed in fibre blender
| The sample code | A | B | C | D |
| The carbon fiber weight percentage | 25％ | 33.33％ | 50％ | 66.66％ |
| The aramid pulp weight percentage | 75％ | 66.66％ | 50％ | 33.33 |
2), above-mentioned A, B, C, D respectively get 30g; Respectively add boron bakelite resin powder 20g in each component and insert then in the powder mixier, be mixed into the composite material moulded powder of fiber by manufacture method of the present invention
3), at the sheet material that is molded on the pressure forming machine about thickness 3mm, it is as follows to be processed into sample mensuration performance;
| The sample code | A | ?B | ?C | ?D |
| Carbon fiber weight percentage % | 15 | ?20 | ?30 | ?40 |
| Aramid pulp weight percentage % | 45 | ?40 | ?30 | ?20 |
| Boron bakelite resin weight percentage % | 40 | ?40 | ?40 | ?40 |
| Density g/cm3 | 1.259 | ?1.298 | ?1.430 | ?1.264 |
| Hardness HB | 285 | ?300 | ?307 | ?342 |
| Flexural strength MPa | 138.6 | ?182.2 | ?147.7 | ?163.0 |
| Modulus in flexure GPa | 8.773 | ?12.06 | ?10.08 | ?10.29 |
| Shock strength KJ/m2 | 6.2 | ?3.6 | ?4.8 | ?5.7 |
| Thermal expansivity 10 -5?1/℃ | 2.3 | ?2.1 | ?2.2 | ?2.0 |
| Thermal conductivity W/m.k | 73.2 | ?75 | ?78 | ?89 |
| Resistance value | 1.90 | ?0.31 | ?0.21 | ?0.22 |
4), above-mentioned A, the B proportioning is mainly used what high-speed bearing material, above-mentioned C, the D proportioning is mainly used what graphite bearing material
Embodiment 3: the high temperature ester aldehyde matrix material of different content of graphite fillers
1), carbon fiber (CF) is 1 with the weight ratio of aramid fiber (KF) pulp fibers; 3 (being A in the example two) are carried out blending in of fibers;
2), fiber, Graphite Powder 99, boron bakelite resin powder are mixed and made into the fibre composite mould pressing powder in following ratio with aforementioned inventive method
Sample code E fiber 12% (KF9% CF3%) graphite 53% resin 35%
Sample code F fiber 24% (KF18% CF6%) graphite 41% resin 35%
Sample code G fiber 36% (KF27% CF9%) graphite 29% resin 35%
Sample code H fiber 48% (KF36% CF12%) graphite 17% resin 35%
3), at the sheet material that is molded on the pressure forming machine about thickness 3mm, it is as follows to be processed into sample mensuration performance;
| The sample code | E | ?F | ?G | ?H |
| Carbon fiber weight percentage % | 3 | ?6 | ?9 | ?12 |
| Aramid pulp weight percentage % | 9 | ?18 | ?27 | ?36 |
| Graphite Powder 99 weight percentage % | 53 | ?41 | ?29 | ?17 |
| Boron bakelite resin weight percentage % | 35 | ?35 | ?35 | ?35 |
| Density g/cm3 | 1.454 | ?1.634 | ?1.537 | ?1.429 |
| Hardness HB | 285 | ?288 | ?302 | ?311 |
| Flexural strength MPa | 61.6 | ?111.4 | ?151.3 | ?151.5 |
| Modulus in flexure GPa | 12.8 | ?14.45 | ?12.78 | ?10.33 |
| Resistance value Ω .cm | 0.06 | ?0.022 | ?0.04 | ?0.14 |
4), E, the F proportioning is mainly used the what conductive plastics
G, the H proportioning is mainly used what heat-conductivity conducting wear-resistant plastic
Embodiment 4: the high temperature resistant ester aldehyde matrix material of fluorine-containing low friction compound
This example is the use occasion design that should not make low friction compound at those with graphite, promptly both wear-resisting but requirement is insulated, or grinding had or not the black requirement, as the application scenario of spun yarn steel order, can make the high temperature resistant ester aldehyde matrix material of fluorine-containing low friction compound according to following prescription.
Getting 100% aramid pulp 16g tetrafluoroethylene 2g boron bakelite resin 16g (is aramid pulp 47% tetrafluoroethylene 6%; Boron bakelite resin 47%) be mixed into the composite material moulded powder of fiber by inventive method, then at the sheet material that is molded on the pressure forming machine about thickness 3mm, it is as follows to be processed into sample mensuration performance;
Density 1.35
Flexural strength 166.9Mpa
Modulus in flexure 8.079Gpa
Resistance to impact shock 14KJ/m2
Frictional coefficient 0.09
Embodiment 5: the different hybrid ratio fiber reinforcement of no filler PPS matrix material
1), carbon fiber and ppta-pulp fibre according to the form below ratio are mixed in fibre blender
| The sample code | I | J | K |
| The carbon fiber weight percentage | 66.6％ | 25％ | -- |
| The aramid pulp weight percentage | 33.3％ | 75％ | 100％ |
2), I, J respectively gets fiber 20g in the K component, get PPS resin-oatmeal 40g (being fibre content 33.3%, resin content 66.6%) in every component and be mixed into fiber powdery matrix material by inventive method
3), with 2) gained powdery matrix material in the rotor Banbury mixer temperature 300-320 ℃ time 10-15 minute rotor speed 80-160 rev/min make master batch; Then master batch is pulverized, the PPS resin content in the according to the form below adds the PPS resin-oatmeal, and uses for injection moulding behind uniform mixing on the homogenizer
4), injection moulding small sample on injection moulding machine; It is as follows to record performance
| The sample code | I | ?J | ?K |
| Carbon fiber weight percentage % | 14 | ?5 | ?---- |
| Aramid pulp weight percentage % | 7 | ?15 | ?20 |
| PPS weight percentage % | 79 | ?80 | ?80 |
| Density g/cm3 | 1.60 | ?1.52 | ?1.45 |
| Hardness HR | ?106 | ?101 | ?100 |
| Tensile strength MPa | ?140 | ?148 | ?138 |
| Flexural strength MPa | ?198 | ?219 | ?201 |
| Modulus in flexure GPa | ?12 | ?11 | ?9.1 |
| Socle girder notched Izod impact strength KJ/m2 | ?10.3 | ?11.4 | ?12.3 |
| Heat-drawn wire ℃ | ?263 | ?263 | ?263 |
| Frictional coefficient | ?0.11 | ?0.13 | ?0.15 |
Embodiment 6: the PPS matrix material of fluorine-containing low friction compound
This example is the same with the prescription purpose of example four, and it (is aramid pulp 47% tetrafluoroethylene 6% with 100% ppta-pulp fibre 16g tetrafluoroethylene, 2g polyphenylene sulfide (PPS) resin 16g; PPS resin 47%) be mixed into the composite material moulded powder of fiber by inventive method, then at the sheet material that is molded on the pressure forming machine about thickness 3mm, it is as follows to be processed into sample mensuration performance;
Density 1.43g/cm3
Hardness HR 102
Tensile strength 140MPa
Flexural strength 200MPa
Modulus in flexure 9.8GPa
Shock strength 12KJ/m2
263 ℃ of heat-drawn wires
Frictional coefficient 0.08
This example formulations mainly should be as spindle of spinning machine rings and the occasion that does not allow the black grinding.
Claims (9)
1, one specific admixture reinforced composite, it is made up of following substances: chopped carbon fiber, ppta-pulp fibre, filler and fire resistant resin; Wherein, the weight ratio of chopped carbon fiber, ppta-pulp fibre, filler and fire resistant resin is respectively 0-40: 5-50: 0-55: 30-85, when the chopped carbon fiber weight ratio was 0, the weight ratio of ppta-pulp fibre, filler and fire resistant resin was that filler weight is than being 5-50: 5-55: 30-85; Described fire resistant resin is that heat-drawn wire is at thermoset more than 260 ℃ and thermoplasticity fire resistant resin.
2, the reinforced composite that mixes as claimed in claim 1 is characterized in that described thermoplasticity fire resistant resin is polyphenylene sulfide, polyetherketone or polyimide; Described thermoset fire resistant resin is resol or phenolic aldehyde epoxy modified resin.
3, the reinforced composite that mixes as claimed in claim 1 is characterized in that described filler is a graphite, tetrafluoroethylene, fluorine 46 or molybdenumdisulphide.
4, a kind of manufacture method that mixes reinforced composite as claimed in claim 1 is characterized in that by following (1) and (2), (1)-(2) and (3), and (1)-(2) and (4) three kinds of methods make:
(1), ppta-pulp fibre or and through oxidation come unstuck chopped carbon fiber mixing in mixing tank, oven dry, shredding, dispersion;
(2), filler and fire resistant resin are mixed mixing in levigate back adding (1) described product, shredding; Or
(3), the product of (2), die press technology for forming; Compression molding pressure 5-12Mpa, mold temperature 170--220 ℃.Through or in the vacuum still immersion lubrication oil; Or
(4), the product of (2) is made master batch, injection moulding;
The weight ratio of above-mentioned chopped carbon fiber, ppta-pulp fibre, filler and fire resistant resin according to claim 1.
5, the manufacture method that mixes reinforced composite as claimed in claim 4 is characterized in that described chopped carbon fiber length is 3-5mm, and described ppta-pulp fibre length is 0.5-3mm.
6, the manufacture method that mixes reinforced composite as claimed in claim 4 is characterized in that described is that chopped carbon fiber is come unstuck through oxidation in 3-30 minute at 350-500 ℃ through the oxidation chopped carbon fiber that comes unstuck.
7, the manufacture method that mixes reinforced composite as claimed in claim 4 is characterized in that described method (3) is in 5-12MPa pressure and 170-220 ℃ of compression molding.
8, a kind of purposes that mixes reinforced composite as claimed in claim 1 is characterized in that the described reinforced composite that mixes is used to make high abrasion goods, the heat-conductivity conducting goods.
9, the purposes that mixes reinforced composite as claimed in claim 8 is characterized in that the described reinforced composite that mixes is used for making the little bearing of spinning ingot, spindle rings, high-speed electric expreess locomotive bearing. graphite bearing, oil bearing etc.
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2005
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