CN104419204A - Resin composition for sliding member - Google Patents
Resin composition for sliding member Download PDFInfo
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- CN104419204A CN104419204A CN201410443054.5A CN201410443054A CN104419204A CN 104419204 A CN104419204 A CN 104419204A CN 201410443054 A CN201410443054 A CN 201410443054A CN 104419204 A CN104419204 A CN 104419204A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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- 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
- C08K2201/00—Specific properties of additives
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- C08K2201/003—Additives being defined by their diameter
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- 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
- C08K2201/00—Specific properties of additives
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- C08K2201/004—Additives being defined by their length
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention provides a resin composition with high tenacity, high heat resistance and low in rolling wear under normal or high temperature and forming body thereof. The resin composition contains (A) 20-80 mass parts of polyamides 9t resin with intrinsic viscosity over 1.0dl/g, (B) 100 mass parts of resin formed by 80-20 mass parts of polyamides 66 resin, (C) 0-45 mass parts of aromatic sulfide resin and (D) 5-85 mass parts of carbon with polyamide fiber cohesiveness additives.
Description
Technical field
The present invention relates to and produce at ball bearing, rolling bearing, linear bearing etc. the resin combination and molding thereof that use in the sliding component rolling and slide.
Background technology
For the life-span of rolling bearing, the rolling contact fatigue that causes of sliding by rolling wear and tear (flaking) be one of very large essential factor.Therefore, the sliding component of rolling bearing is required rolling contact fatigue abrasion resistance strong.In addition, as to sliding component requirement, large distortion when can enumerate the assembling that can tolerate bearing and do not produce damaged etc., namely has excellent toughness.In addition, the environment for use condition enclosing the finished product of rolling bearing becomes harsh year by year, thus also requires thermotolerance, Lightness, productivity (time, cost) etc. simultaneously.
In the middle of these had various requirements, for heat resistant requirements, in the past used metal, heat-curing resin are just enough.But, with regard to these materials, be difficult to side by side to meet Lightness, productivity and resistance to rolling contact fatigue abradability.Particularly for productivity, often need the secondary processing such as cutting when sliding component complex-shaped, thus will spend a large amount of time and cost.So the thermoplastic resin by using resistance to rolling contact fatigue abradability, toughness, excellent heat resistance can be said, utilizing injection forming to process and producing, just also can side by side meet Lightness, productivity.
Be representative as the resin of resistance to rolling contact fatigue abradability excellence with polyamide 66 resin, carried out fiber strengthened combination product in the product of reality.But when being greater than long-term running continuously under the hot environment of 150 DEG C, wearing and tearing significantly become large, are thus difficult to application.
On the other hand, as can withstand high temperatures, long-time use under high surface pressure environment sliding component, there will be a known and employ by terephthalic acid units and 1,9-nonamethylene diamine unit and/or 2-methyl isophthalic acid, the semiaromatic polyamide composition 9T resin that 8-octamethylenediamine unit is formed, the rolling sliding component (patent documentation 1) containing weighting agent.
So, to wear and tear few resin combination as rolling contact fatigue under normal temperature and hot environment, the resin combination coordinated in the semiaromatic polyamide composition 9T resin that thermotolerance is high the strong polyamide 66 resin of the abrasion resistance of resistance to rolling contact fatigue can be considered.
But, according to the research of the present inventor etc., if only coordinate polyamide 9T resin in polyamide 66 resin, such as only strengthen with glass fibre, although then the molding of said composition has toughness, thermotolerance, mechanical properties, but the resistance to rolling contact fatigue abradability excellence under it is hard to tell normal temperature and high temperature.
Prior art document
Patent documentation
Patent documentation 1: Japanese Patent No. 4766649 publications
Summary of the invention
Invent problem to be solved
The object of the invention is to, obtain the resin combination and molding thereof with resistance to rolling contact fatigue abradability excellence under excellent toughness, thermotolerance, this external normal temperature and hot environment.
For the method for dealing with problems
The present inventor etc. have carried out various research, found that, by in the Amilan polyamide resin composition that the polyamide 9T resin of specific limiting viscosity and polyamide 66 resin are formed with specific mass ratio, collection of filaments agent containing specified quantitative is polyamide-based carbon fiber, and the polyarylene sulfide resin as required containing specified quantitative, the resin combination of the problems referred to above that just can be resolved and molding thereof, thus complete the present invention.
That is, the present invention is content as follows.
[1] a kind of resin combination, its resinous principle 100 mass parts formed with (B) polyamide 66 resin 80 ~ 20 mass parts relative to polyamide 9T resin 20 ~ 80 mass parts by (A) limiting viscosity being more than 1.0dl/g, also contains (C) polyarylene sulfide resin 0 ~ 45 mass parts and the agent of (D) collection of filaments is polyamide-based carbon fiber 5 ~ 85 mass parts.
[2] resin combination Gen Ju [1], wherein, A) limiting viscosity be the polyamide 9T resin of more than 1.0dl/g is 40 mass parts ~ 80 mass parts, polyamide 66 resin is 60 ~ 20 mass parts.
[3] according to [1] or the resin combination described in [2], wherein, described collection of filaments agent is polyamide-based carbon fiber is 10 ~ 50 mass parts.
[4] according to [1] or the resin combination described in [2], wherein,
Described polyarylene sulfide resin is polyphenylene sulfide.
[5] resin combination Gen Ju [3], wherein,
Described polyarylene sulfide resin is polyphenylene sulfide.
[6] according to [1] or the resin combination described in [2], wherein,
The flexural strain of ASTM tension test sheet is more than 3%.
[7] resin combination Gen Ju [3], wherein,
The flexural strain of ASTM tension test sheet is more than 3%.
[8] molding, it is formed by the resin combination described in [1] or [2].
[9] molding, it is formed by the resin combination described in [3].
[10] molding Gen Ju [8], it is used by as rolling slip purposes.
[11] molding Gen Ju [9], it is used by as rolling slip purposes.
The effect of invention
Resin combination of the present invention has excellent toughness, thermotolerance, and under normal temperature and hot environment, resistance to rolling contact fatigue abradability is excellent.Thus, the molding formed by resin combination of the present invention goes for various sliding component, especially in the purposes such as bearing, whole line slideway, particularly straight line axle sleeve retainers.
Accompanying drawing explanation
Fig. 1 is the sectional view of the summary schematically illustrating " rolling contact fatigue wear testing machine " used in embodiments of the invention.
Embodiment
Resinous principle 100 mass parts that resin combination of the present invention is formed with (B) polyamide 66 resin 80 ~ 20 mass parts relative to polyamide 9T resin 20 ~ 80 mass parts by (A) limiting viscosity being more than 1.0dl/g is polyamide-based carbon fiber 5 ~ 85 mass parts containing (C) polyarylene sulfide resin 0 ~ 45 mass parts and the agent of (D) collection of filaments.
(A) polyamide 9T resin
(A) polyamide 9T resin used in the present invention gives the resistance to rolling contact fatigue abradability of the excellence under excellent resistance to rolling contact fatigue abradability, particularly hot environment to resin combination of the present invention.
Here, (A) polyamide 9T resin used in the present invention in concentrated sulfuric acid 30 DEG C of limiting viscosities determined [η] needs for more than 1.0dl/g, is preferably more than 1.1dl/g.If limiting viscosity [η] is less than 1.0dl/g, then the rolling contact fatigue wearing and tearing under normal temperature and high temperature significantly become large.
Polyamide 9T resin is for the dicarboxylic acid component of terephthalic acid and 60 ~ 100 % by mole of whole diamine component are 1 by whole dicarboxylic acid component's 60 ~ 100 % by mole, 9-nonamethylene diamine and/or 2-methyl isophthalic acid, the Semi-aromatic polyamide resin of the diamine component formation of 8-octamethylenediamine.Specifically, be using poly-paraphenylene terephthalamide's nonamethylene diamine and/or poly-paraphenylene terephthalamide 2-methyl octamethylenediamine as the Semi-aromatic polyamide resin of principal constituent.
The dicarboxylic acid component of polyamide 9T resin contains the terephthalic acid of 60 ~ 100 % by mole of whole dicarboxylic acid component.As the content of the terephthalic acid in dicarboxylic acid component, be preferably 75 ~ 100 % by mole, be more preferably 90 ~ 100 % by mole.
As the dicarboxylic acid component beyond terephthalic acid, propanedioic acid, dimethyl malonic acid, succinic acid, pentanedioic acid, hexanodioic acid, 2-methyl hexanodioic acid, trimethyladipic acid, pimelic acid, 2 can be enumerated, the aliphatic dicarboxylic acids such as 2-dimethylated pentanedioic acid, 3,3-diethyl succinic acids, nonane diacid, sebacic acid, suberic acid; The ester ring type dicarboxylic acid such as 1,3-cyclopentane dicarboxylic acid, Isosorbide-5-Nitrae-cyclohexane dicarboxylic acid; By m-phthalic acid, 2,6-naphthalene dicarboxylic acids, 2,7-naphthalene dicarboxylic acids, Isosorbide-5-Nitrae-naphthalene dicarboxylic acids, Isosorbide-5-Nitrae-benzene dioxy diacetic acid, 1,3-benzene dioxy diacetic acid, diphenic acid, dibenzoic acid, 4,4 '-oxygen dibenzoic acid, ditan-4,4 '-dicarboxylic acid, sulfobenzide-4,4 '-dicarboxylic acid, 4, the unit that the aromatic dicarboxylic acids such as 4 '-diphenyldicarboxylic acid are derivative, what can use in the middle of them is one kind or two or more.
The diamine component of polyamide 9T resin contains 1,9-nonamethylene diamine and/or the 2-methyl isophthalic acid of 60 ~ 100 % by mole of whole diamine component, 8-octamethylenediamine.As the total content of 1,9-nonamethylene diamine in diamine component and 2-methyl 1,8-octamethylenediamine, be preferably 70 ~ 100 % by mole, be more preferably 80 ~ 100 % by mole.
By 1,9-nonamethylene diamine and 2-methyl isophthalic acid, 8-octamethylenediamine and when, 1,9-nonamethylene diamine: 2-methyl isophthalic acid, the mol ratio of 8-octamethylenediamine is preferably 30: 70 ~ 95: 5, is more preferably 40: 60 ~ 90: 10, more preferably 60: 40 ~ 90: 10.
As diamine component other than the above, quadrol, propylene diamine, Putriscine, 1 can be enumerated, 6-hexanediamine, 1,8-octamethylenediamine, 1，10-diaminodecane, 1,12-dodecamethylene diamine, 2-methyl isophthalic acid, 5-pentamethylene diamine, 3-methyl isophthalic acid, 5-pentamethylene diamine, 2,2,4-trimethylammonium-1,6-hexanediamine, 2,4,4-trimethylammonium-1,6-hexanediamine, 5-methyl isophthalic acid, the aliphatie diamines such as 9-nonamethylene diamine; The ester ring type diamines such as cyclohexanediamine, methyl cyclohexane diamines, isophorone diamine; Ursol D, mphenylenediamine, p-Xylol diamines, m-xylene diamine, 4,4 '-diaminodiphenyl-methane, 4,4 '-diamino diphenyl sulfone, 4, aromatic diamine or their the arbitrary mixtures such as 4 '-diamino-diphenyl ether.
In addition, the end of its molecular chain is preferably utilized end-capping reagent sealing by polyamide 9T resin, preferably by preferably more than 40 % by mole of terminal group, more preferably more than 60 % by mole, further preferably more than 70 % by mole sealings.
As end-capping reagent, as long as there is the compound of reactive mono-functional with the amino of polymeric amide end or carboxyl, be just not particularly limited, but from the viewpoint of stability etc. that is reactive and end-blocking, preferred monocarboxylic acid or monoamine, from the viewpoint of the easness etc. disposed, more preferably monocarboxylic acid.In addition, the acid anhydrides such as Tetra hydro Phthalic anhydride, monoisocyanates, single etheride, monoesters class, single methanol class etc. can also be used.
As the monocarboxylic acid being used as end-capping reagent, as long as have the reactive material with amino, just be not particularly limited, but such as can enumerate the aliphatic monocarboxylic acids such as acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, sad, lauric acid, tridecyl acid, tetradecanoic acid, palmitinic acid, stearic acid, trimethylacetic acid, isopropylformic acid; The ester ring type monocarboxylic acids such as hexahydrobenzoic acid; Aromatic monocarboxylate or their the arbitrary mixture such as phenylformic acid, toluylic acid, α-naphthoicacid, β-naphthoic acid, methylnaphthalene formic acid, phenylacetic acid.In the middle of them, from the viewpoint of reactive, end-blocking stability, price etc., particularly preferably acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, sad, lauric acid, tridecyl acid, tetradecanoic acid, palmitinic acid, stearic acid, phenylformic acid.
As the monoamine being used as end-capping reagent, just be not particularly limited with reactive material of carboxyl as long as have, but such as can enumerate the aliphatics monoamines such as methylamine, ethamine, propylamine, butylamine, hexylamine, octylame, decyl amine, stearylamine, dimethylamine, diethylamine, dipropyl amine, dibutylamine; The ester ring type such as hexahydroaniline, dicyclohexyl amine monoamine; Aromatic series monoamine or their the arbitrary mixtures such as aniline, Tolylamine, pentanoic, naphthylamines.In the middle of them, from the viewpoint of the stability and price etc. of reactivity, boiling point, end-blocking, particularly preferably butylamine, hexylamine, octylame, decyl amine, stearic amine, hexahydroaniline, aniline.
The usage quantity of end-capping reagent used during manufacture polyamide 9T resin is determined by the limiting viscosity [η] of the polyamide resin finally obtained and the sealing rate of terminal group.Concrete usage quantity changes according to the reactivity, boiling point, reaction unit, reaction conditions etc. of end-capping reagent used, but usually uses in the scope of 0.5 ~ 10 % by mole relative to the total mole number of diamines.
(B) polyamide 66 resin
Polyamide 66 resin used in the present invention is the aliphatic polyamide resin formed by hexanodioic acid and 1,6-hexanediamine, gives resistance to rolling contact fatigue abradability to resin combination of the present invention.
Polyamide 66 resin can utilize known method manufacture, and the viscosity number of formic acid concn 90% is preferably 130 ~ 150 [ml/g], is more preferably 135 ~ 145 [ml/g].
(C) polyarylene sulfide resin
(C) polyarylene sulfide resin used as required in the present invention is the polymkeric substance that repeating unit represents with following general formula (I), can make the stability that the rolling under resin combination of the present invention raising high temperature is slided.
-(Ar-S)-(I)
In formula (I), Ar represents arylidene, and S represents sulphur.
In the middle of polyarylene sulfide resin, preferably use the polyphenylene sulfide that arylidene is phenylene.As this kind of polyphenylene sulfide, can enumerate described arylidene is such as with the polyphenylene sulfide that following structural formula represents.
[changing 1]
These polyphenylene sulfides comprising phenylene can be any one of the homopolymer be made up of identical repeating unit, the multipolymer be made up of different phenylene of more than two kinds and their mixture.
In addition, the polymkeric substance of a part for its polymer chain with other also in the scope not damaging effect of the present invention, can replace by described polyarylene sulfide resin.As the polymkeric substance replaced like this, such as, can enumerate polyamide-based polymkeric substance, Polyester polymkeric substance, polyarylene ether based polymer, polystyrenic polymer, polyolefin polymkeric substance, fluoropolymer, polyolefin elastomerics, polyamide-based elastomerics, silicone-based elastomerics etc.
This kind of polyarylene sulfide resin such as can utilize the method recorded in Japanese Patent Publication 45-3368 publication, Japanese Patent Publication 52-12240 publication etc. to manufacture.And described polyarylene sulfide resin also can heat in atmosphere and polymer quantizes, and in addition, the compounds such as acid anhydrides can also be used to carry out chemically modified.
Melt viscosity (velocity of shear 1216/ second) at 300 DEG C of the polyarylene sulfide resin used as required in the present invention is preferably 100 ~ 1500 pools, is more preferably 350 ~ 700 pools.
(D) carbon fiber
(D) carbon fiber used in the present invention is the material of the mechanical characteristic improving resin combination of the present invention, particularly plays the effect improving flexural strength.
In the present invention, for the collection of filaments agent of carbon fiber, from the viewpoint of the consistency with matrix resin, use polyamide-based.If use the collection of filaments agent beyond it, then the rolling contact fatigue wearing and tearing under normal temperature and high temperature significantly become large.Carbon fiber is chopped strand preferably, and Cutting Length be 6mm, Fibre diameter is 6 ~ 7 μm.
When replacing with the glass fibre of the percentage by volume identical with carbon fiber, the rolling contact fatigue wearing and tearing under normal temperature and high temperature significantly become large, cannot use.
In heat-resistant resin composition of the present invention, except above-mentioned (A) ~ (D) composition, the arbitrary additive such as antioxidant, nucleator, softening agent, releasing agent, fire retardant, pigment, carbon black, anti-static electricity interference agent can also be coordinated in the scope not hindering effect of the present invention.
Such as, if about the 1 quality % of entirety, also can for improving in mixture and the object of the thermostability of product and add antioxidant.As antioxidant, be suitably for tetramethylolmethane four [3-(3,5-di-t-butyl-4 hydroxy phenyl) propionic ester] (Ciba Japan Inc., IRGANOX1010).
In resin combination of the present invention, when to be the polyamide 9T resin of more than 1.0dl/g by (A) limiting viscosity be set to 100 mass parts with the total of (B) polyamide 66 resin, (A) limiting viscosity be polyamide 9T portions of resin (B) polyamide 66 resin of more than 1.0dl/g containing being 20: 80 ~ 80: 20 than (mass parts), be preferably 40: 60 ~ 80: 20, be more preferably 60: 40 ~ 80: 20.
If the polyamide 9T resin that limiting viscosity is more than 1.0dl/g is less than 20 mass parts, then lack thermotolerance, the wearing and tearing of rolling contact fatigue in addition under high temperature significantly become large, if more than 80 mass parts, then the rolling contact fatigue wearing and tearing under normal temperature and high temperature significantly become large.
In heat-resistant resin composition of the present invention, relative to polyamide resin composition 100 mass parts that the polyamide 9T resin by (A) limiting viscosity being more than 1.0dl/g is formed with (B) polyamide 66 resin, (C) content of polyarylene sulfide resin is 0 ~ 45 mass parts, be preferably 1 ~ 30 mass parts, be more preferably 1 ~ 10 mass parts.
If poly arylidene thio-ester is more than 45 weight parts, then lacking toughness, the rolling contact fatigue wearing and tearing in addition under normal temperature and high temperature significantly become large.In addition, by containing poly arylidene thio-ester more than 1 weight part, the stability that the rolling under high temperature is slided can be improved.
In addition, in heat-resistant resin composition of the present invention, relative to polyamide resin composition 100 mass parts that the polyamide 9T resin by (A) limiting viscosity being more than 1.0dl/g is formed with (B) polyamide 66 resin, (D) collection of filaments agent is the content of polyamide-based carbon fiber is 5 ~ 85 mass parts, be preferably 10 ~ 50 mass parts, be more preferably 10 ~ 15 mass parts.
If this carbon fiber is less than 5 mass parts, then lack flexural strength (intensity), the rolling contact fatigue wearing and tearing in addition under normal temperature and high temperature significantly become large.If this carbon fiber is more than 85 mass parts, then lacking toughness, the rolling contact fatigue wearing and tearing in addition under normal temperature and high temperature significantly become large.
Preparation method for resin combination of the present invention is not particularly limited, and known method can be utilized to prepare.Such as, after being mixed at normal temperatures by mentioned component, utilize the various methods such as melting mixing to mix, its method is not particularly limited.
The melting mixing employing biaxial extruder is preferably adopted in the middle of mixed milling method.In the melting mixing employing biaxial extruder, preferably more than 310 DEG C and be less than 340 DEG C mixing.By melting temperature is set to more than 310 DEG C, will fully melting and do not have the situation that viscosity becomes too high as the highest polyamide 9T resin of fusing point raw material, therefore productivity can not reduce.In addition, be less than 340 DEG C by being set to, the thermolysis of polyamide 66 resin that just can be minimum using the decomposition temperature as raw material is limited in inferior limit.
For using the manufacturing process of resin combination of the present invention to be also not particularly limited, the known formed machining method such as injection forming, extrusion molding can be used.Wherein preferably use injection forming processing.
Forming temperature during injection forming is preferably more than 300 DEG C and is less than 340 DEG C.By forming temperature is set to more than 300 DEG C, more than the fusing point of the resin compound of institute's melting mixing, therefore will not have the situation that mobility reduces.In addition, being less than 340 DEG C by being set to, the decomposition temperature of the resin compound of institute's melting mixing would not being greater than, thermolysis can being restricted to inferior limit.
In addition, as die temperature, be preferably 120 ~ 160 DEG C, be more preferably 130 ~ 140 DEG C.By die temperature is set to more than 130 DEG C, mixture will crystallization fully, can play the performance of this composition fully.In addition, by being set to less than 140 DEG C, the distortion of resin when just can suppress the demoulding.
[embodiment]
Below, based on embodiment, more specific description is carried out to the present invention, but the present invention is not by any restriction of these embodiments.
And the physical property test in following embodiment and comparative example, rolling contact fatigue wearing test are carried out as shown below.
(1) flexural strength (intensity)
Measure according to ASTM D790.Make according to ASTM D790 specified dimension the test film that thickness is 3.2mm, this test film is implemented test in temperature 23 ± 5 DEG C, humidity after placing 48 hours 50 ± 10% times.The R footpath of fulcrum is bottom 2mm, top 5mm, and span is 50mm, and trial speed is 2mm/min.
If be more than 200MPa, then can say that having practicality as product goes up enough intensity.When being less than 200MPa, "×" on note in Table 1.
(2) flexural strain (toughness)
Measure according to ASTM D790.Make according to ASTM D790 specified dimension the test film that thickness is 3.2mm, this test film is implemented test in temperature 23 ± 5 DEG C, humidity after placing 48 hours 50 ± 10% times.The R footpath of fulcrum is bottom 2mm, top 5mm, and span is 50mm, and trial speed is 2mm/min.
If have more than 3%, then can say as having practical enough toughness product.When being less than 3%, "×" on note in Table 1.
(3) load deflection temperature (thermotolerance)
Measure according to ASTM D648.Make according to ASTM D648 specified dimension the test film that thickness is 3.2mm, this test film is implemented test in temperature 23 ± 5 DEG C, humidity after placing 48 hours 50 ± 10% times.Load is 1.8MPa, and heat-up rate is 120 DEG C/h, strains as 0.26mm, and span is 100mm.
If there are more than 220 DEG C, then can say that having practicality as product goes up enough thermotolerances.When being less than 220 DEG C, "×" on note in Table 1.
(4) rolling contact fatigue wearing and tearing (resistance to rolling contact fatigue abradability) under high-temperature atmosphere and under normal temperature atmosphere
This test be by the rolling body 3 (ball) of single entry thrust ball bearing to the surface of resin molded body 1 with a constant load pushing while make it to rotate (rotation, revolution) and in resin molded body 1, produce the sliding test of fatigue wear.
The formation of trier comprises non-rotating side and rotary side.Non-rotating side is fixed in metal clamps 7 by discoid resin molded body 1, then be arranged on excellent for its precision on non-rotating shaft 6.With regard to rotary side, on turning axle 5, precision excellent ground fixing strip has the rail wheel 2 of track, and rail wheel 2 is placed rolling body 3 and its retainer 4 of maintenance.The upper front end folder of non-rotating shaft 6 is connected with load cell (figure omits) across spring coil.
When utilizing the screw mechanism of trier main body to be moved by load cell self downwards, spring coil is just compressed, and produces the load matched with its compression displacement amount and spring constant, to the surface pushing rolling body 3 of resin molded body 1.Pushing load is detected by load cell, certain by being feedback controlled in the mode reaching the load of setting.When being rotated with certain linear velocity by turning axle 5 in this condition, rolling body 3 and retainer 4 will rotate (revolution) linkedly, and rolling body 3 slides (rotation) at the surface scrolls of resin molded body 1.The heat of friction being delivered to fixture 7 is now measured by thermopair 8.Form the structure (figure omits) that can detect the torque (rolling resistance) transmitted from turning axle 5 to non-rotating shaft 6 in addition.When the wearing and tearing of the resin molded body 1 because of rolling contact fatigue advance, non-rotating side will with the amount worn away displacement downwards.Sensor is utilized to read this displacement, stop to test when reaching more than certain certain value (being more than 15 μm in this research) by the displacement that causes of wearing and tearing, utilize the resistance to rolling contact fatigue abradability of the length of time so far (life time) to resin material relatively compare or determine whether qualified.
And, by dismounting stove 9, can test under normal temperature atmosphere and under high-temperature atmosphere.
Test conditions is as follows.
The pushing load of thrust direction is set to 50N, and the rotating speed of turning axle 6 is set to 2970rpm (3.5m/s), the test temperature under high-temperature atmosphere is set to 150 DEG C, and the test temperature under normal temperature atmosphere is set to 23 DEG C of room temperature.From NSK Inc. single entry thrust ball bearing (model: 51104) employ rolling body 3, retainer 4, rail wheel 2 with track.The material becoming the rolling body 3 of the subject material of resin molded body is SUJ2.
Using the discoid molding of thick 3.0mm, φ 50.0mm as test film, after this test film is flooded 72 hours in 23 DEG C of pure water, under normal temperature atmosphere or under high-temperature atmosphere, implement test.
When the displacement caused by wearing and tearing after 200 hours not arriving 15 μm yet, thinking that there is practical enough antifatigue abradabilityes, being labeled as "○" in Table 1, marking by "×" in addition.
In above-mentioned test the change of wearing and tearing displacement in test little and roll sliding stability when (amplitude of wearing and tearing displacement waveform is about 0 ~ 4 μm), in Table 1 the stability of sliding of rolling is labeled as "○", when unstable behavior can be seen a little (amplitude of wearing and tearing displacement waveform is about 5 ~ 9 μm), by rolling, the stability of sliding is labeled as " Δ ", when change is unstable significantly (amplitude of wearing and tearing displacement waveform is more than 10 μm), by rolling, the stability of sliding is labeled as "×".
And this test determines the status of accelerated test and the test designed alone, within set 200 hours, such value is different from life time when being applied in practical product.
Embodiment 1 ~ 7 and comparative example 1 ~ 8
By following gradation composition with after the ratio dry type mixing shown in table 1; biaxial extruder is used while by reinforcing fiber (carbon fiber or glass fibre) side-fed, to carry out melting mixing at barrel temperature 320 DEG C; after being cooled in the sink by the billot of gained, tablets press is utilized to be cut into one fixed width and to make particle.
Utilized by the particle of gained injection forming to be processed into the test film shape corresponding with above-mentioned various tests (1) ~ (4), implement test.Test-results is shown in table 1.
< polyamide 9T resin-1 (PA9T-1 (limiting viscosity 1.2dl/g)) >
By using terephthalic acid as the dicarboxylic acid component of principal constituent with 1,9-nonamethylene diamine and 2-methyl isophthalic acid, the Semi-aromatic polyamide resin (Kuraray Inc., trade(brand)name " GC72010 ") that 8-octamethylenediamine obtains as the diamine component of principal constituent.
< polyamide 9T resin-2 (PA9T-2 (limiting viscosity 0.9dl/g)) >
By using terephthalic acid as the dicarboxylic acid component of principal constituent with 1,9-nonamethylene diamine and 2-methyl isophthalic acid, the Semi-aromatic polyamide resin (Kuraray Inc., trade(brand)name " GC61210 ") that 8-octamethylenediamine obtains as the diamine component of principal constituent.
< polyamide 66 resin (PA66) >
The aliphatic polyamide resin (Rhodia Japan Inc., trade(brand)name " 27AE1K ") formed by hexanodioic acid and 1,6-hexanediamine.
< polyphenylene sulfide (PPS) >
The resin (DIC Inc., trade(brand)name " LR-2G ") formed by the repeating unit of phenylene and sulphur.
[0001] < carbon fiber-1 (CF-1 (nylon system collecting agent)) >
Diameter is the PAN system chopped carbon fiber of 6 ~ 7 μm.Use the collection of filaments agent (Li Yang Inc. of Mitsubishi, trade(brand)name " TR06NLB6R ") of nylon system.
< carbon fiber 1 (CF-2 (polyurethane series collecting agent)) >
Diameter is the PAN system chopped carbon fiber of 6 ~ 7 μm.Use the collection of filaments agent (Li Yang Inc. of Mitsubishi, trade(brand)name " TR06ULB6R ") of polyurethane series.
< glass fibre (GF) >
Diameter is the glass fibre (Owens Coming Inc., trade(brand)name " CS03 JAFT591 ") of 10 μm
[table 1]
The following conclusion according to the results verification of above embodiment and comparative example.
Such as, if employ the polyamide 9T resin-2 that limiting viscosity is low, rolling contact fatigue wearing and tearing large (comparative example 6) then under normal temperature and high-temperature atmosphere, if employ glass fibre as weighting agent, resistance to rolling contact fatigue abradability then under normal temperature and high-temperature atmosphere, the stability bad (comparative example 7) of sliding of rolling, if employ the carbon fiber of polyurethane series collecting agent, then the resistance to rolling contact fatigue abradability bad (comparative example 8) under normal temperature and high-temperature atmosphere.
Different with it, by coordinating polyamide 9T resin-1, polyamide 66 resin, polyphenylene sulfide in the scope of technical scheme 1, collection of filaments agent is polyamide-based carbon fiber, can obtain having excellent toughness, thermotolerance, rolling contact fatigue weares and teares few under normal temperature and hot environment resin combination (embodiment 1 ~ 7).
Utilizability in industry
Resin combination of the present invention is resistance to rolling contact fatigue abradability, tenacity excellent as sliding component purposes, and the sliding properties particularly during high temperature is excellent, goes in the purposes such as bearing, all line slideway, particularly straight line axle sleeve retainer.
The explanation of symbol
1 resin molded body
2 rail wheels
3 rolling bodys
4 retainers
5 turning axles
6 non-rotating shafts
7 metal clamps
8 thermopairs
9 stoves
Claims (11)
1. a resin combination, its resinous principle 100 mass parts formed with (B) polyamide 66 resin 80 ~ 20 mass parts relative to polyamide 9T resin 20 ~ 80 mass parts by (A) limiting viscosity being more than 1.0dl/g, also contains (C) polyarylene sulfide resin 0 ~ 45 mass parts and the agent of (D) collection of filaments is polyamide-based carbon fiber 5 ~ 85 mass parts.
2. resin combination according to claim 1, wherein, A) limiting viscosity be the polyamide 9T resin of more than 1.0dl/g is 40 mass parts ~ 80 mass parts, polyamide 66 resin is 60 ~ 20 mass parts.
3. resin combination according to claim 1 and 2, wherein, described collection of filaments agent is polyamide-based carbon fiber is 10 ~ 50 mass parts.
4. resin combination according to claim 1 and 2, wherein,
Described polyarylene sulfide resin is polyphenylene sulfide.
5. resin combination according to claim 3, wherein,
Described polyarylene sulfide resin is polyphenylene sulfide.
6. resin combination according to claim 1 and 2, wherein,
The flexural strain of ASTM tension test sheet is more than 3%.
7. resin combination according to claim 3, wherein,
The flexural strain of ASTM tension test sheet is more than 3%.
8. a molding, it is formed by the resin combination described in claim 1 or 2.
9. a molding, it is formed by resin combination according to claim 3.
10. molding according to claim 8, it is used by as rolling slip purposes.
11. moldinies according to claim 9, it is used by as rolling slip purposes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013183096A JP6093675B2 (en) | 2013-09-04 | 2013-09-04 | Resin composition for sliding member |
| JP2013-183096 | 2013-09-04 |
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| CN104419204A true CN104419204A (en) | 2015-03-18 |
| CN104419204B CN104419204B (en) | 2018-04-17 |
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| CN (1) | CN104419204B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI758369B (en) * | 2016-12-08 | 2022-03-21 | 荷蘭商帝斯曼知識產權資產管理有限公司 | Thermoplastic composition, molded part made thereof and use thereof in automotive and e&e applications |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6093675B2 (en) | 2017-03-08 |
| JP2015048461A (en) | 2015-03-16 |
| CN104419204B (en) | 2018-04-17 |
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