CN100510446C - Retainer for bearing - Google Patents
Retainer for bearing Download PDFInfo
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- CN100510446C CN100510446C CNB2005800282492A CN200580028249A CN100510446C CN 100510446 C CN100510446 C CN 100510446C CN B2005800282492 A CNB2005800282492 A CN B2005800282492A CN 200580028249 A CN200580028249 A CN 200580028249A CN 100510446 C CN100510446 C CN 100510446C
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Abstract
The present invention provides a bearing retainer, which is molded with a resin composition comprising a polyphenylene sulfide and a second resin having a higher deflection temperature under a load at 1.8 MPa than polyphenylene sulfide. The bearing retainer exhibits high heat resistance, chemical resistance, oil resistance, strength at a high temperature, and the like, being comparable to those of a conventional bearing retainer made of polyether ether ketone and further exhibits higher accuracy in dimension and shape and can be produced at a lower cost, as compared to a bearing retainer made of polyether ether ketone. It is preferred that the above second resin is a resin having a flexural modulus higher than that of polyphenylene sulfide and that a resin composition contains carbon fiber as a reinforcing fiber.
Description
Technical field
The present invention relates to be used to keep the bearing retainer of the rotor of rolling bearing.
Background technique
Polyether-ether-ketone (PEEK) even in crystalline thermoplastic resin, also has high-caliber heat resistance, resistance to chemical reagents, oil resistance (to the patience of lubricant oil or grease), hot strength, creep strength etc.Therefore, use these characteristics, the described PEEK of research and utilization makes, resin system bearing retainer for example can be under the high temperature more than 180 ℃ high speed rotating (more than the 15000rpm), that can be used for rolling bearing that alternator uses etc.
For example, in patent documentation 1, the feature of having put down in writing the characteristic that illustrates previously of using PEEK, being shaped as the injectable of thermoplastic resin, though by in described PEEK, disperseing polybenzimidazoles etc. to have the heat resistance higher than thermoplastic resin, but the powder of the heat-resistant resin of injection moulding difficulty, make the resin composition that injectable is shaped, the described resin composition of injection moulding is made bearing retainer.According to described formation, in the past, owing to can have bearing retainer with the roughly equal high heat resistance of the bearing retainer of the heat-resistant resin system of only making by cutting etc. by the injection moulding manufacturing, thereby can reduce the manufacture cost of bearing retainer significantly.
Patent documentation 1:WO-A1-9901676
But, PEEK, because shaping shrinkage rate is big, especially, in bearing retainer, exist as the open one-sided shape of crown type retainer, after injection moulding, the demoulding, the dimensional changes of open sides, or the shape of open sides changes easily thereupon, the size of the regulation of bearing retainer, the problem that the precision of shape is low.In addition, PEEK also exists as the very expensive problem of thermoplastic resin.Therefore, seek to possess the high heat resistance roughly equal, resistance to chemical reagents, oil resistance, hot strength, creep strength etc. with the bearing retainer of PEEK system, compare with the bearing retainer of PEEK system simultaneously, the precision of size, shape is high, and can be with the resinous bearing retainer of low cost manufacturing.
Summary of the invention
The present invention is the bearing retainer that is formed by the resin composition that contains polyphenylene sulfide and the 2nd resin, it is characterized in that, described the 2nd resin is the resin higher than polyphenylene sulfide of the loading deflection temperature under 1.8MMPa.
As described the 2nd resin, the preferred crooked elastic rate resin higher than polyphenylene sulfide.In addition, as the 2nd resin, preferably from by polyamidoimide, all aromatic polyimide, Polyetherimide, polyether sulfone, polysulfones, and the group that constitutes such as polyether-ether-ketone at least a kind of resin selecting.
Bearing retainer of the present invention, preferred, with respect to polyphenylene sulfide 100 weight portions, contain described the 2nd resin in the ratio of 10～100 weight portions.In addition, preferably contain carbon fiber as reinforced fiber.
In the present invention, the resin composition that employing contains polyphenylene sulfide (PPS) and the 2nd resin forms bearing retainer, this polyphenylene sulfide, remove than PEEK cheapness, and have outside the high heat resistance roughly equal with PEEK, resistance to chemical reagents, the oil resistance, go back injectable and be shaped the 2nd resin, because the loading deflection temperature than described PPS height, is compared not enough hot strength so can replenish the PPS monomer with PEEK.And, described resin composition, to compare shaping shrinkage rate little with PEEK.Therefore, according to the present invention, compare with the bearing retainer of described PEEK system, when can possess the high-fire resistance roughly equal, resistance to chemical reagents, oil resistance, hot strength etc. with the low cost manufacturing with the bearing retainer of in the past PEEK system, the bearing retainer that the precision of size, shape is high.
In addition, as described the 2nd resin, under the situation that adopts crooked elastic rate high resin, can also bearing retainer be given and the roughly equal high creep strength of the bearing retainer of PEEK system than PPS.As the 2nd resin that satisfies these characteristics, adopt from by polyamidoimide, all aromatic polyimide, Polyetherimide, polyether sulfone, polysulfones, and the group that constitutes such as polyether-ether-ketone under the situation of at least a kind of resin selecting, because described resin is complete and PPS mixes, or constitute uniform island structure, so can improve more illustrate previously utilize the 2nd resin replenish PPS hot strength effect or bearing retainer is given the effect of high creep strength.
Bearing retainer of the present invention, with respect to polyphenylene sulfide 100 weight portions, ratio in 10～100 weight portions contains under the situation of the 2nd resin, and the hot strength that heat resistance, resistance to chemical reagents, oil resistance and the 2nd resin that can together PPS be formed forms maintains in the good scope.In addition, bearing retainer of the present invention under situation about containing as the carbon fiber of reinforced fiber, can improve the hot strength or the creep strength of described bearing retainer more.In addition, can also reduce the friction factor of bearing retainer, reduce wear extent.
Description of drawings
Fig. 1 is the ball bearing stereogram of the outward appearance of retainer of expression by embodiments of the invention, comparative example manufacturing.
Fig. 2 is used for the sectional view of the ball bearing of the described embodiment of rotation test, comparative example with the testing apparatus of retainer.
Fig. 3 is the plotted curve of the ball bearing of expression embodiment 1,2, comparative example 1 with the dimensional changes amount after the rotation test of retainer.
Fig. 4 is the plotted curve of the ball bearing of expression embodiment 1～4, comparative example 1 with the dimensional changes amount after the rotation test of retainer.
Fig. 5 is that expression is carried out static creep test with retainer for the ball bearing to embodiment, described ball bearing with retainer on the stereogram of state of mounting Metal Ball.
Fig. 6 is the plotted curve of expression embodiment's 1,3 ball bearing with the dimensional changes amount after the static creep test of retainer.
Embodiment
Bearing retainer of the present invention adopts the resin composition contain PPS and loading deflection temperature 2nd resin higher than described PPS, forms by injection moulding etc.As described PPS, has repetitive with formula (1) expression, for example after by the right polymer of polymerization synthesis of oligonucleotides, in the presence of air heating carry out partial cross-linked and form HMW so-called crosslinked formula PPS or when polymerization, obtain the PPS of the known multiple grade in the past that the injectable among the PPS etc. of so-called linear type of high molecular weight polymers is shaped, all can use.Especially, the PPS of preferred linear type.
[changing 1]
In addition, the PPS of linear type, if consider to give high heat resistance, hot strength and creep strength to bearing retainer, preferably its number-average molecular weight Mn is big as far as possible, especially preferred number average molecular weight Mn is more than 8000.In addition, the number-average molecular weight Mn of the PPS of linear type if consideration improves thermal propertys such as heat resistance, even in described scope, also is the bigger the better.
But, under the excessive situation of molecular weight, the heating resin composition, the flowability when making it to melt descends, and when injection moulding, the misgivings that described resin composition fully can not be filled to each bight in the die cavity corresponding with the shape of bearing retainer is arranged.Therefore, the number-average molecular weight Mn of the PPS of linear type, even in described scope, especially, preferably below 20000, more preferably 8500～12000.
As the 2nd resin, in order to improve the hot strength of bearing retainer, the resin of the loading deflection temperature of the PPS that needs to adopt the loading deflection temperature to be higher than combination.Even this is because cooperation loading deflection temperature equates with PPS or than its low resin, can not improve the hot strength of bearing retainer.
As long as the loading deflection temperature of the 2nd resin is can than the loading deflection temperature higher position of the PPS that makes up.But, if consider further to improve the hot strength of bearing retainer, the loading deflection temperature of described the 2nd resin, preferably the loading deflection temperature than the PPS that makes up is high more than 20 ℃, more preferably high more than 30 ℃.About the upper limit of the loading deflection temperature of the 2nd resin, do not limit especially.This be because, improve the loading deflection temperature of the 2nd resin more, can improve the hot strength of bearing retainer more.
In addition, as the 2nd resin, when preferably adopting the loading deflection temperature to satisfy described condition, the resin that crooked elastic rate is higher than PPS.Thus, can give bearing retainer good creep strength.As long as the crooked elastic rate of the 2nd resin is can than the crooked elastic rate higher position of the PPS that makes up.But if consider further to improve the creep strength of bearing retainer, the crooked elastic rate of described the 2nd resin is preferably more than the high 500MPa of crooked elastic rate than PPS, more than the more preferably high 1000MPa.About the upper limit of the crooked elastic rate of the 2nd resin, do not limit especially.This be because, improve the crooked elastic rate of the 2nd resin more, can improve the creep strength of bearing retainer more.
In the present invention, regulation be used in ISO 75-1:1993 " 1 one of the test method-Di of plastics-loading deflection temperature: general rule ", and ISO 75-2:1993 " 2 ones of the test method-Di of plastics-loading deflection temperature: plastics and ebonite " in regulation, the loading deflection temperature under flexural stress 1.8MPa of flattening test sheet represents the loading deflection temperature of PPS and the 2nd resin.In addition, crooked elastic rate, regulation is used in the crooked elastic rate of regulation among the ISO 178-1:1993 " test method of plastics-flexural property " and represents.
In addition, in the present invention, regulation all uses loading deflection temperature, the creep strength of the resin monomer of mismatching reinforced fiber or filling material etc. to represent the loading deflection temperature and the creep strength of PPS and the 2nd resin.Loading deflection temperature or the crooked elastic rate of PPS, because of the kind of PPS is different, even and the PPS of identical type also the difference because of molecular weight is different, in addition, in the PPS of crosslinked formula, because of the difference of crosslinking rate different.Therefore, if with intrinsic loading deflection temperature or crooked elastic rate in the PPS of combination as benchmark, selected have the loading deflection temperature that satisfies described condition, and the 2nd resin of crooked elastic rate just passable.
In addition, as the 2nd resin, fully preferred and PPS mixes, or constitutes the resin of uniform island structure.As the 2nd resin so, can enumerate polyamidoimide (PAI), all aromatic polyimide (PI), Polyetherimide (PEI), polyether sulfone (PES), polysulfones (PSU), and polyether-ether-ketone (PEEK) in waiting more than a kind or 2 kinds, can be from wherein selecting the resin of the condition that satisfies loading deflection temperature or crooked elastic rate that use illustrates previously.
About the cooperation ratio of PPS and the 2nd resin, do not limit especially, but preferably with respect to the PPS100 weight portion, cooperate the 2nd resin in the ratio of 10～100 weight portions.If the cooperation ratio of the 2nd resin is lower than 10 weight portions, the misgivings of the effect of the hot strength that can not fully obtain cooperating the raising bearing retainer that described the 2nd resin forms or creep strength are arranged.In addition, surpassing under the situation of 100 weight portions, owing to relatively reduce the ratio of PPS, so have reduce with the 2nd resin and form with described PPS, keep the high heat resistance equal, resistance to chemical reagents, oil resistance, hot strength, creep strength etc. with the bearing retainer of PEEK system, seek the misgivings of effect of the cost reduction of bearing retainer simultaneously.
In addition, the flowability when heating resin composition in addition and making it to melt reduces, and when injection moulding, described resin composition fully can not be filled to the misgivings in each bight in the die cavity corresponding with shape bearing retainer mould.More than 2 kinds and in the 2nd resin, preferably its total amount is in the scope of described cooperation ratio.
In resin composition, except that reinforced fiber, filling material, also can cooperate various additives.As reinforced fiber, for example can enumerate in glass fibre, carbon fiber, fibrous wollastonite, silicon carbide fiber, boron fiber, alumina fibre, Si-Ti-C-O fiber, steel fiber (copper, steel, stainless steel etc.), aromatic polyamide fiber, potassium titanate crystal whisker, graphite whisker, silicon carbide whisker, silicon nitride crystal whisker, the alumina whisker etc. more than a kind or 2 kinds.
In addition, as filler, for example can enumerate in the powder etc. of inorganic matter such as powder, graphite, aluminium oxide, silica, silicon carbide, silicon nitride, carbon black, molybdenum disulfide, talcum, silicious marl, asbestos, magnesium carbonate, calcium carbonate, glass bead, silica ball of heat-resistant resins such as phenolic resin, silicone resin, fluororesin, polyamide-imide resin, polyimide resin, aromatic polyamide resin more than a kind or 2 kinds.
For reinforced fiber and filling material, can in resin composition, only cooperate either party, also can cooperate both sides.Its cooperation ratio, promptly, when only separately cooperating in reinforced fiber or the filling material either party, the cooperation ratio of the composition that it is independent, and, when also using both, the cooperation ratio of its total, preferably 10～50 weight portions in total amount 100 weight portions of PPS, the 2nd resin, reinforced fiber and/or filling material.
The cooperation ratio of reinforced fiber and/or filling material if be lower than described scope, has the additive effect that can not fully obtain these compositions, promptly strengthens the misgivings of the effect of bearing retainer.In addition, surpass under the situation of described scope in the cooperation ratio, there be the flowability of heating resin composition when making it to melt to descend, when injection moulding, described resin composition fully can not be filled to the misgivings in each bight in the die cavity corresponding mould with shape bearing retainer.
In the present invention, especially,, preferably cooperate carbon fiber as reinforced fiber.Because it is little that carbon fiber and prevailing reinforced fiber are that glass fibre is compared proportion, so in the total amount with respect to PPS and the 2nd resin, when cooperating by certain weight ratio, if see by volume, can cooperate than described glass fibre with Duoing.Therefore, the volume ratio of the resin by relatively reducing to become the reason that reduction in strength under the high temperature or creep take place can improve the hot strength or the creep strength of bearing retainer.
In addition, compare, can also make described carbon fiber be present in the surface of bearing retainer with finer and close state with glass fibre.In addition, carbon fiber is compared with glass fibre, and friction factor is little.Therefore, be present in the function of carbon fiber on the surface of bearing retainer by state, can reduce the friction factor on described surface, reduce wear extent simultaneously with densification.
As carbon fiber, preferred, use the carbon fiber of its diameter more than the minimum value 3 μ m of the diameter of the carbon fiber that can obtain easily at present and below 15 μ m.Diameter at carbon fiber surpasses under the situation of 15 μ m, has the toughness of bearing retainer to reduce, in the recess that rotor is pressed into described bearing retainer etc., and the misgivings that rupture easily or fracture.In addition, if considering further to improve the toughness that prevents bearing retainer reduces, simultaneously by cooperating carbon fiber to improve the hot strength or the creep strength of bearing retainer as reinforced fiber, and reduce the friction factor on surface, reduce the effect of wear extent, more preferably the diameter of carbon fiber is 6～10 μ m.
The cooperation ratio of carbon fiber, preferably 10～50 weight portions in total amount 100 weight portions of PPS, the 2nd resin and carbon fiber are more preferably 20～40 weight portions.If the cooperation ratio of carbon fiber is lower than described scope, have and fully to obtain by cooperating carbon fiber to improve the hot strength or the creep strength of bearing retainer as reinforced fiber, and reduce its surperficial friction factor, reduce the misgivings of the effect of wear extent simultaneously.
In addition, surpass under the situation of described scope, have the toughness of bearing retainer to reduce in the cooperation ratio, in the recess that rotor is pressed into described bearing retainer etc., the misgivings that rupture easily or fracture.In addition, the flowability when heating resin composition in addition and making it to melt descends, and when injection moulding, this resin composition fully can not be filled to the misgivings in each bight in the die cavity corresponding with shape bearing retainer mould.
Bearing retainer of the present invention, at fusing, mixing described each composition, after formation granular, Powdered etc. can be used as the shape of moulding material use, can be samely by manufacturings such as injection mouldings.Formation of the present invention can be used in the bearing retainer of all shapes that multiple rolling bearings such as ball bearing, needle roller bearing, barrel roller bearing, tapered roller bearing use.
The bearing retainer of the present invention that forms like this, possess the high heat resistance roughly equal, resistance to chemical reagents, oil resistance, hot strength etc., be used in rolling bearing high speed rotating under the high temperature more than 180 ℃ (more than the 15000rpm), that alternator is used etc. with the bearing retainer of in the past PEEK system.In addition, owing to contain the resin composition of PPS and the 2nd resin, to compare shaping shrinkage rate little with PEEK, so bearing retainer of the present invention is compared with the bearing retainer of PEEK system, especially in bearing retainer as the open one-sided shape of crown type retainer, can prevent after injection moulding, the demoulding, the dimensional changes of open sides, or the shape of open sides changes the precision of raising size, shape thereupon.And because PPS is than PEEK cheapness, and injectable is shaped, thus bearing retainer of the present invention compare with the bearing retainer of PEEK system, can also be with lower cost manufacturing.
Embodiment
The research of＜the 2 resin 〉
As PPS, studied the PPS of the linear type that adopts number-average molecular weight Mn=8700, simultaneously with the 2nd resin of described PPS combination.As the 2nd resin, adopt 6 kinds of resins of note sample 1～6 down.
Sample 1:PAI is a resin
Sample 2:PI is a resin
Sample 3:PEI is a resin
Sample 4:PES is a resin
Sample 5:PSU is a resin
Sample 6:PEEK is a resin
About resin, the PPS of described each sample and the composite material that in the PPS of 70 weight portions, cooperates the glass fibre of 30 weight portions,, measure the loading deflection temperature of flat specimen according to the ISO75-1 that illustrates previously and 2.In addition, according to ISO178, measure crooked elastic rate.Table 1 illustrates its result.
Table 1
| The loading deflection temperature (℃) | Crooked elastic rate (MPa) | |
| PPS | 110 | 3200 |
| PAI | 278 | 4900 |
| PI | Surpass 360 | 3090 |
| PEI | 200 | 3300 |
| PES | 203 | 2550 |
| PSU | 175 | 2690 |
| PEEK | 140 | 3620 |
| The PPS+ glass fibre | 255 | 85000 |
Find out that by table 1 resin of each sample is because all loading deflection temperatures are all than PPS height, so by cooperating described any resin as the 2nd resin in PPS, can both improve the bearing retainer hot strength.In addition, draw, the PAI of sample 1 is that the PEI of resin, sample 3 is that resin, the PEEK that reaches sample 6 are resin, because crooked elastic rate is than PPS height, so, can both improve the creep strength of bearing retainer by in PPS, cooperating described any resin as the 2nd resin.
The research of＜shaping shrinkage rate 〉
As PPS, studied the PPS that adopts the linear type of number-average molecular weight Mn=8700, adopting by weight cooperating the PAI of described PPS and sample 1 in 70/30 ratio simultaneously is resin, the resin composition that cooperates the carbon fiber of 30 weight % simultaneously, the shaping shrinkage rate of the long 127mm of injection moulding, wide 12.7mm, thick 3.2mm is measured the test film 1 of usefulness.In addition, in order to compare, adopting at the PEEK of sample 6 is the resin composition that cooperates the glass fibre of 30 weight % in the resin, the test film 2 of injection moulding same size.As the mould of injection moulding, adopt central authorities to have cast gate, the length direction of test film and the consistent mould of flow direction from the resin composition of cast gate injection at length direction.
About described test film 1,2,, measure flow direction, and the shaping shrinkage rate of the Vertical direction consistent of described resin composition with the thickness direction of test film according to the determining method of putting down in writing among the ASTMD955-00.Table 2 illustrates its result.
Table 2
By finding out in the table, with the resin composition of PPS and the 2nd resin, especially, compare the shaping shrinkage rate of the Vertical direction that reduces test film significantly with PEEK according to also, can improve the size of bearing retainer, the precision of shape.
＜embodiment 1,2 〉
According to above-mentioned result, by weight the ratio of 70: 30 (embodiment 1) or 62.5: 37.5 (embodiment 2), cooperate 110 ℃ of PPS[loading deflection temperatures, crooked elastic rate 3200MPa, the number-average molecular weight Mn=8700 of described linear type] and be resin [278 ℃ of loading deflection temperatures, crooked elastic rate 4900MPa] as the PAI of the sample 1 of the 2nd resin.In addition, add glass fibre 30 weight portions in complex 70 weight portions of two resins, resin composition is made in fusing, mixing, adopts described resin composition, and by injection moulding, make and have shape shown in Figure 1, and recess side boundary dimension D
1Be 40mm, internal diameter size D
2For 30mm, height T are the ball bearing retainer H of 10mm.
Comparative example 1
Use PPS separately with the identical linear type of in embodiment 1,2, using, in described PPS70 weight portion, add glass fibre 30 weight portions, fusing, mixing, make resin composition, adopt described resin composition, by injection moulding, manufacturing has same shape, unidimensional ball bearing retainer H.
Rotation test:
Will be by the ball bearing retainer H of embodiment 1,2, comparative example 1 manufacturing, the rolling bearing of packing into, with the filling fluorocarbon oil fat state of (in perfluoroalkyl polyethers, having cooperated the grease of polytetrafluorethylepowder powder as water-thickening agent), in the testing apparatus shown in Figure 2 of packing into as base oil.
Testing apparatus among the figure possesses: fixed side shell 2, and portion has cartridge heater 1 within it; Running shaft 5, its rotation are supported by the rolling bearing 3 and the back side bearing 4 of packing into of the test of the front side of the described fixed side shell 2 of packing into freely; Pulley 6, it is fixed on the end of front side of described running shaft 5; Many V belt 7, its hang over described pulley 6 and not shown motor live axle between.
With pack into the front side of described testing apparatus of the rolling bearing 3 of test, adjust the tension force of many V belt 7, shown in the arrow of pressing solid line among the figure, pulley 6 is applied the state of load, make machine operation, make running shaft 5 rotations with the rotational speed of 18000rpm, adjust circuit by not shown temperature equally simultaneously and begin energising, reach 200 ℃ with the temperature of the rim of the rolling bearing 3 of the test of using not shown thermocouple measurement to cartridge heater 1.
Then, when the temperature of rim reaches 200 ℃, make its continuously rotation take out ball bearing retainer H from rolling bearing 3 after 1000 hours, mensuration recess side outside dimension D
1Dimensional changes (mm).Fig. 3 illustrates its result.Find out by Fig. 3, in PPS, cooperate the embodiment's 1,2 of the 2nd resin ball bearing retainer, compare,, confirm to improve hot strength and creep strength owing to the dimensional changes amount can be reduced about 1/5～1/2 degree with comparative example 1.
Embodiment 3,4:
By weight the ratio of 70: 30 (embodiment 3) or 62.5: 37.5 (embodiment 4), cooperate with the PPS of the identical linear type of use in embodiment 1,2 and be resin as the PAI of the sample 1 of the 2nd resin.In addition, add carbon fiber (diameter 6 μ m) 30 weight portions in complex 70 weight portions of two resins, resin composition is made in fusing, mixing, adopts described resin composition, by injection moulding, makes same shape, unidimensional ball bearing retainer H.Ball bearing retainer H to making by described embodiment 3,4 carries out the rotation test of front.Combine with the result of embodiment 1,2, comparative example 1 it be the results are shown among Fig. 4.
Static creep test:
By shown in Figure 5, will be by the ball bearing retainer H of embodiment's 1,3 manufacturings, the recess side is placed on the base plate of level up, with the state of the Metal Ball M of mounting diameter 40mm, great about 260g thereon, take out after in being set in 200 ℃ thermostatic bath, leaving standstill 160 hours, measure recess side internal diameter size D
2Dimensional changes amount (mm).Fig. 6 illustrates its result.
Find out by Fig. 4,6, adopt the embodiment's 3 of carbon fiber ball bearing retainer as reinforced fiber, compare with the embodiment 1 who adopts glass fibre, can reduce the dimensional changes amount in rotation test and the static creep test, can improve hot strength and creep strength.
Claims (4)
1. bearing retainer, it is formed by resin composition, it is characterized in that, described resin composition contains polyphenylene sulfide, polyamidoimide and as the carbon fiber of reinforced fiber, described polyamidoimide perhaps constitutes uniform island structure fully mutually with polyphenylene sulfide, and the loading deflection temperature of described polyamidoimide under 1.8MPa is than polyphenylene sulfide height
With respect to described polyphenylene sulfide 100 weight portions, the content of described polyamidoimide is more than 10 weight portions, and with respect to described polyphenylene sulfide 62.5 weight portions, the content of described polyamidoimide is below 37.5 weight portions,
In total amount 100 weight portions of described polyphenylene sulfide, described polyamidoimide and described carbon fiber, contain the described carbon fiber of 10～50 weight portions.
2. bearing retainer as claimed in claim 1 is characterized in that, described polyamidoimide is the crooked elastic rate resin higher than polyphenylene sulfide.
3. bearing retainer as claimed in claim 1 is characterized in that, with respect to polyphenylene sulfide 70 weight portions, contains described polyamidoimide with the ratio more than 30 weight portions.
4. as each described bearing retainer in the claim 1-3, wherein, in total amount 100 weight portions of described polyphenylene sulfide, described polyamidoimide and described carbon fiber, contain the described carbon fiber of 20～40 weight portions.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP238722/2004 | 2004-08-18 | ||
| JP2004238722 | 2004-08-18 | ||
| JP299246/2004 | 2004-10-13 |
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| Publication Number | Publication Date |
|---|---|
| CN101031733A CN101031733A (en) | 2007-09-05 |
| CN100510446C true CN100510446C (en) | 2009-07-08 |
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| CNB2005800282492A Expired - Fee Related CN100510446C (en) | 2004-08-18 | 2005-08-18 | Retainer for bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3001511B1 (en) * | 2013-01-25 | 2016-02-26 | Skf Ab | CAGE FOR BEARING, IN PARTICULAR FOR MOTOR VEHICLE ELECTRIC DIRECTION BEARING |
| CN109504030B (en) * | 2018-12-12 | 2021-07-20 | 江苏澳盛复合材料科技有限公司 | Carbon fiber reinforced polyether-ether-ketone composite material |
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2005
- 2005-08-18 CN CNB2005800282492A patent/CN100510446C/en not_active Expired - Fee Related
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| JP2001-165172A 2001.06.19 |
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Granted publication date: 20090708 Termination date: 20110818 |