JPH09151313A - Heat-resistant and lubricating resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composition capable of providing high-performance heat- resistant lubricating bearings as a heat-resistant and lubricating resin composi tion having all of non-aggression properties to alloys. SOLUTION: This resin composition contains 40-77vol.% aromatic polyether ketone resin, polycyanoaryl ether resin or polyamideimide resin as a main component and contain 16-38vol.% fluororesin and 5-25vol.% aromatic polyester resin as essential components or contains 20-72vol.% of the main component and further 5-30vol.% thermoplastic polyimide resin or polyphenylene sulfide resin as an essential component or contains 40-87vol.% of the main component and 8-38vol.% fluororesin, 3-25vol.% aromatic polyester resin and 2-20vol.% aromatic polyamide fiber or contains 20-80vol.% of the main component and further 5-30vol.% thermoplastic polyimide resin or polyphenylene sulfide resin as an essential component.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant / lubricating resin composition used as various sliding members and a heat-resistant sliding bearing, and particularly to a heat-resistant / lubricating resin applicable to a fixing device of an electrophotographic apparatus. The present invention relates to a composition and a heat resistant plain bearing.

[0002]

2. Description of the Related Art In recent years, as the field of application of synthetic resin sliding bearings has expanded, there has been a strong demand for synthetic resin sliding bearings that exhibit good friction and wear characteristics under the operating conditions of the bearings, especially in high temperature atmospheres. ing.

With the weight reduction of bearings and peripheral equipment, aluminum alloys and the like have been used as sliding mating materials for bearings. Such bearings do not damage relatively soft sliding mating materials. Characteristics are required. As a specific example of the heat-resistant sliding bearing which is required to have a property of not damaging a relatively soft sliding mating material as well as frictional wear characteristics, a bearing for a heat fixing device such as a copying machine or a laser beam printer is given. be able to.

The general usage of such a slide bearing will be described below. That is, a copying machine or a laser beam printer having a mechanism for transmitting information of an original image to a transfer material which is a recording material by using a charged image is generally referred to as an electrophotographic apparatus. As illustrated in FIG. 3, a heating roller 10 that heat-fixes the toner image on the transfer material, and a pressure roller 11 that presses the transfer material against the heating roller 10 to rotate the transfer material are mounted.

The former heating roller 10 is often made of an aluminum alloy containing Mg,
The heater 12 heats it to a temperature of about 150 to 230 ° C.
The latter pressure roller 11 is made of an iron material coated with silicone rubber or the like, and this is also heated to about 70 to 150 ° C. by heat transfer from the heating roller 10.

FIG. 4 shows a fixing device having a mechanism different from that of the above-mentioned heat fixing device. Instead of a metal heating roller, a heat-resistant synthetic resin film is coated with a release agent to form an endless material. The annular fixing film 15 is attached to the roller 1
7. The ceramic heater 16 is supported by the fixing film 15
It is brought into pressure contact with the pressure roller 11 via the to improve the heat conduction efficiency. In this case, the pressure roller 11 becomes even hotter than that of the fixing device using the metal heating roller 10 described above.

As described above, the ends of the rollers used in the high temperature state are made of synthetic resin slide bearings 13 and 14 (in the apparatus shown in FIG. 4, the pressure roller 11 and the roller 17 in FIG. 3 for supporting the roller 17). , Bearings corresponding to 14), and as a material thereof, polyphenylene sulfide (hereinafter, referred to as a thermoplastic synthetic resin having good heat resistance and excellent mechanical strength)
Resin (abbreviated as PPS) is used.

In this case, since the PPS resin has a poor self-lubricating property, a composition containing a lubricant such as graphite, tetrafluoroethylene resin, lubricating oil, metal oxide or aromatic polyamide resin may be used. Many.

The aromatic polyether ketone resin is
The characteristics have been improved so that the sliding material has excellent heat resistance and can be used even under severe conditions such as high load and high speed sliding under high temperature.

As a technique for improving such a sliding material, Japanese Patent Application Laid-Open Nos. 58-109554 and 58-1762 are available.
Japanese Unexamined Patent Publication No. 42-42 describes that an aromatic polyether ketone resin is added with a tetrafluoroethylene resin or an aromatic polyamide resin to improve the sliding characteristics of the aromatic polyether ketone resin.

Further, JP-A-58-160347 discloses that tetrafluoroethylene resin and oxybenzoyl polyester are added to aromatic polyether ketone resin to improve abrasion resistance.

[0012]

However, in any of the above-mentioned materials, when sliding against a soft material such as aluminum under a high temperature condition, the soft material is significantly damaged, and as described above, the friction wear is caused. Along with the characteristics, there is a problem that the soft sliding mating material does not exhibit the characteristics of not being damaged.

For example, if carbon fibers are blended to improve the wear resistance, the soft aluminum alloy as a sliding counterpart is damaged, and the friction and wear characteristics are further deteriorated.

In particular, in the field of copying machines, it has been demanded to raise the temperature of the heating roller to 250 to 270 ° C. in order to rapidly fuse and fix the toner, in accordance with the demand for high-speed operation of the apparatus. However, a heat resistant / lubricating resin composition which can be used as a sliding member such as a sliding bearing has not been obtained.

Therefore, the object of the present invention is to solve the above-mentioned problems and to provide a heat-resistant / lubricating resin composition with heat resistance superior to that of conventional compositions, and also with low friction characteristics, wear resistance and aluminum. The object of the present invention is to provide a non-aggressive material against soft sliding mating materials such as alloys, and to provide a heat resistant sliding bearing of extremely high performance.

[0016]

In order to solve the above problems, in the present invention, 40 to 77% by volume of an aromatic polyetherketone resin, a polycyanoaryl ether resin or a polyamideimide resin, a fluororesin is used. The heat-resistant and lubricating resin composition contains 16 to 38% by volume and 5 to 25% by volume of the aromatic polyester resin as essential components.

Or an aromatic polyether ketone resin,
20 to 72% by volume of either polycyanoaryl ether resin or polyamide-imide resin, fluororesin 16
~ 38% by volume, aromatic polyester resin 5-25% by volume
And a heat-resistant / lubricating resin composition containing 5 to 30% by volume of a thermoplastic polyimide resin as an essential component.

Or an aromatic polyether ketone resin,
20 to 72% by volume of either polycyanoaryl ether resin or polyamide-imide resin, fluororesin 16
~ 38% by volume, aromatic polyester resin 5-25% by volume
Further, a heat-resistant / lubricating resin composition containing 5 to 30% by volume of a polyphenylene sulfide resin as an essential component is provided.

Or an aromatic polyether ketone resin,
40-87% by volume of either polycyanoaryl ether resin or polyamide-imide resin, fluororesin 8-
The heat-resistant / lubricating resin composition contains 38% by volume, 3-25% by volume of the aromatic polyester resin and 2-20% by volume of the aromatic polyamide fiber as essential components.

Or an aromatic polyether ketone resin,
20 to 80% by volume of either polycyanoaryl ether resin or polyamide-imide resin, fluororesin 8 to
Heat resistance with 38% by volume, aromatic polyester resin 3 to 25% by volume, aromatic polyamide fiber 2 to 20% by volume, and thermoplastic polyimide resin 5 to 30% by volume as essential components.
That is, it is a lubricating resin composition.

Or an aromatic polyether ketone resin,
20 to 80% by volume of either polycyanoaryl ether resin or polyamide-imide resin, fluororesin 8 to
38% by volume, aromatic polyester resin 3 to 25% by volume,
The heat-resistant / lubricating resin composition contains 2 to 20% by volume of aromatic polyamide fiber and 5 to 30% by volume of polyphenylene sulfide resin as essential components.

Alternatively, a heat-resistant / lubricating resin composition is obtained by adding 2 to 15% by volume of scaly graphite to each of the above heat-resistant / lubricating resin compositions.

Further, the heat resistant / lubricating resin composition is molded into a heat resistant plain bearing.

The heat-resistant / lubricating resin composition of the present invention has an extremely excellent heat resistance of the aromatic polyether ketone resin, polycyanoaryl ether resin or polyamide-imide resin, which is the main component, and the aromatic compound to be added. The polyester resin has a large critical PV value and is present in the composition in a spherical state, which serves as a load point during friction and reduces the friction coefficient. In addition, a fluororesin compounded with the other improves the slidability, and the aromatic polyamide resin improves the wear resistance of the soft partner material without damaging the soft partner such as an aluminum alloy.

By blending these components in a predetermined amount, excellent heat resistance, low friction characteristics, wear resistance, and non-aggressiveness against a soft alloy such as an aluminum alloy are all provided. Moreover, since an aromatic polyether ketone resin, polycyano aryl ether resin or polyamide imide resin is a main component, injection molding is possible.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION First, an aromatic polyether ketone resin used in the present invention (hereinafter abbreviated as PEK).
Is a polymer consisting of one of the repeating units represented by the formulas below in Chemical Formula 5, or together with such a repeating unit, for example, the repeating units represented by the formulas in Chemical Formula 6 below, having the original characteristics of PEK. It is a polymer coexistent so as not to be lost.

[0027]

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[0028]

[Chemical 6]

A commercially available product of such PEK is represented by the following chemical formula 7 and manufactured by VICTREX: P
Examples include EEK, PEK manufactured by VICTREX, which is represented by the following chemical formula 8, and ULPEK manufactured by BASF, which is represented by the following chemical formula 9.
In addition to the above-mentioned commercially available products, these can also be produced by known methods described in JP-A-54-90296 and the like.

[0030]

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[0031]

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[0032]

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Next, the polycyanoaryl ether resin (hereinafter abbreviated as PEN) used in the present invention is a compound consisting of a repeating unit represented by the following chemical formula 10 or a compound represented by the following chemical formula 11 The repeating unit represented by the formula is a polymer coexisting at a ratio of about 20 mol% or less so as not to impair the original properties of PEN.

[0034]

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[0035]

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Such PEN preferably has a reduced viscosity (ηsp / C) of 0.3 g / dl or more at 60 ° C. in a 0.2 g / dl concentration solution using p-chlorophenol as a solvent. These are commercially available from Idemitsu Kosan Co., Ltd. as polyether nitrile (ID300). Note that P
The method for producing EN is also disclosed in the examples of JP-A-63-3059.

The polyamide-imide resin (hereinafter abbreviated as PAI) used in the present invention has a structure represented by the following chemical formula 12, and a part of the imide bond is an amic acid as a ring-opening precursor. R ₁ is an aromatic group containing at least one benzene ring, including those which remain in a bonded state, of which divalent two carbonyl groups are attached to adjacent carbon atoms in the benzene ring of R _1. It is one that is combined. The PAI used in the present invention may be a copolymer with a compound containing such a structure and another amide bond.

[0038]

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(In the formula, R ₁ represents a trivalent aromatic group containing at least one benzene ring, R ₂ represents a divalent organic group, and R ₃ represents hydrogen, a methyl group or a phenyl group).

Examples of desirable R ₁ in the chemical formula 12 are as shown in the following chemical formula 13.

[0041]

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Examples of desirable R ₂ in the chemical formula 12 are — (CH ₃ ) _m —, (where m is a saturated aliphatic hydrocarbon group of 4 to 12), and the following chemical formula 14. There is something.

[0043]

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(In the general formula of the group shown in Chemical formula 14, Y is 1
To an integer of 3 and X ₄ is an aliphatic hydrocarbon group or aromatic group having 1 to 6 carbon atoms).

As a method for producing such PAI, a well-known method disclosed in patent publications such as US Pat. No. 3,625,911 and Japanese Patent Publication No. 50-33120 may be adopted. Aromatic tricarboxylic acid anhydride or a derivative thereof, and H ₂ N—R ₂ —
NH ₂ , OCN-R ₂ -NCO, (wherein R ₂ is as described in Chemical Formula 12 or Chemical Formula 13 above), and an organic diamine or a derivative thereof are combined with dimethylacetamide, dimethylformamide or N-. The reaction is carried out in a polar organic solvent such as methylpyrrolidone at a predetermined temperature for a required time to generate a polyamic acid, which is converted into an imidized state by heating or another method.

[0046]

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As the PAI produced by this method, there is a PAI represented by the formula of the following chemical formula 16, and as a commercially available product thereof, Torlon (registered trademark) manufactured by Amoco Inc. in the United States can be mentioned. Further, these PAIs may be copolymers with other compounds containing an amide bond.

[0048]

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PEK, PEN or P as described above
AI can sufficiently exhibit the characteristics of these heat-resistant resins if the above-mentioned predetermined amount is blended as a main component in the heat-resistant / lubricating composition.

Next, the fluororesin used in the present invention may be a polymer having a carbon chain in which a fluorine atom is bonded to the main chain, or a copolymer containing such a polymer. That is, as the fluororesin, polytetrafluoroethylene (hereinafter abbreviated as PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (abbreviated as PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP) Abbreviated), ethylene-tetrafluoroethylene copolymer (E
TFE), tetrafluoroethylene-fluoroalkyl vinyl ether-fluoroolefin copolymer (abbreviated as EPE), ethylene-trichlorofluoroethylene copolymer (ECTFE), polyvinylidene fluoride (abbreviated as PVDF), and the like. Can be mentioned. These may be used alone or as a mixture.

Of these fluororesins, fully fluorinated PTFE is most suitable, and it may be a powder for molding or a so-called fine powder for a solid lubricant. You may use together. It should be noted that a specific commercially available product of PTFE, which will be described later, gives favorable results even when used alone.

Commercially available products of PTFE include Teflon 7J and TLP-10 manufactured by Mitsui DuPont Fluorochemicals.
Asahi Glass Co., Ltd .: Fluon G163, Daikin Industries Co., Ltd .: Polyflon M12, M15, Lubron L5, Hoechst Co .: Hostaflore TF9205, and the like. Also, P modified with alkyl vinyl ether
It may be TFE.

Examples of PFA include Teflon PFA-J and MP-10 manufactured by Mitsui DuPont Fluorochemicals, Hostaflon TFA manufactured by Hoechst, and Neoflon PFA manufactured by Daikin Industries.

In the invention of the heat resistant / lubricating resin composition containing no aromatic polyamide fiber as an essential component, the blending amount of the fluororesin is limited to 16 to 38% by volume. The reason is that if it is less than 16% by volume, the lubricating property is poor and 3
This is because if the amount exceeds 8% by volume, the moldability of the composition is impaired. From such a tendency, a more preferable compounding ratio is 18 to 35% by volume.

In the heat-resistant / lubricating resin composition of the present invention, in the invention containing aromatic polyamide fiber as an essential component, the amount of fluororesin is limited to 8 to 38% by volume. This is because, for the same reason as described above, if the amount is less than 8% by volume, the lubricating properties are poor, and if the amount is more than 38% by volume, the moldability of the composition is impaired. Is 10 to 35% by volume
It is.

Next, the aromatic polyester resin used in the present invention is preferably a homopolymer of a polyoxybenzoyl polyester shown in Chemical formula 17 below. It has a melting point near 610 ° C, and
Almost no softening occurs at a temperature of 00 ° C or lower, and it exhibits extremely excellent physical properties such as wear resistance, compression creep resistance, and chemical resistance. Further, its crystal structure is a plate-like crystal structure similar to a solid lubricant such as graphite or molybdenum disulfide, and is also excellent in self-lubricating property. In the present invention, it is also possible to use a copolymer containing polyoxybenzoyl polyester as a copolymerization component.

Such an aromatic polyester resin has a spherical shape and its particle size is 5 to 100 μm, and a preferable result is obtained by using this.

[0058]

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A method for producing such an aromatic polyester resin is described in JP-B-46-6796 and JP-B-47-4.
7870, JP-A-54-46287 and JP-A-54-46291 are well known, and as a commercial product of the polyoxybenzoyl polyester shown in Chemical formula 17, Sumitomo Chemical Co., Ltd. Manufacturing: Sumika Super E101 and the like can be exemplified.

In the invention of the heat-resistant / lubricating resin composition containing no aromatic polyamide fiber as an essential component, the blending amount of the aromatic polyester resin is limited to 5 to 25% by volume. This is because if the amount is less than 5% by volume, the lubrication properties are poor, and if the amount is more than 25% by volume, the melt viscosity becomes high and the moldability deteriorates, or the mechanical strength decreases, which is not preferable. From the tendency, a more preferable blending ratio is 5 to 20% by volume.

In the heat-resistant / lubricant resin composition of the present invention containing aromatic polyamide fiber as an essential component, the amount of aromatic polyester resin is 3 to 25% by volume.
Limited to. Because 3% by volume for the same reason as above
If the amount is less than 25% by volume, the lubricating properties are poor, and if it exceeds 25% by volume, the melt viscosity becomes high and the moldability deteriorates, or the mechanical strength decreases, which is not preferable. The preferable blending ratio of the aromatic polyester resin is 3 to 20% by volume.

Further, the aromatic polyamide resin used in the present invention is a resin having a repeating unit represented by the following chemical formula 18 or chemical formula 19 as a repeating unit. There is a system. Examples of commercially available meta-type aromatic polyamide resins include Nomex manufactured by DuPont Toray Kevlar, and Technora manufactured by Teijin. Commercially available para-aromatic polyamide resins include DuPont Toray Kevlar: Kevlar,
Made by Japan Aramid Co .: Twaron is mentioned.

[0063]

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[0064]

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As the aromatic polyamide resin used in the present invention, the above-mentioned para-based resins are more preferable. Since the para-aromatic polyamide resin has molecular chains arranged in the fiber axis direction, it has high elasticity and high strength in the axial direction, but weak intermolecular force in the perpendicular direction. As described above, the para-aromatic polyamide resin can improve the wear resistance of the resin composition well by the strength in the axial direction, and the molecular chain is buckled or broken when the compressive force is applied in the direction perpendicular to the fiber. Since it is easy, it is considered that the soft sliding mating material will not be damaged.

When such an aromatic polyamide resin is used as a fiber, a fiber having a fiber length of 0.15 to 3 mm and an aspect ratio of 10 to 230 is adopted to obtain preferable results. If the fiber length of the aromatic polyamide fiber is less than the predetermined range, the abrasion resistance becomes insufficient, and if the fiber length exceeds the above range, the dispersion in the composition is unsatisfactory, which is not preferable. From such a tendency, a more preferable fiber length is 0.15 to 1.5 mm. If the aspect ratio is less than the above range, the shape of the powder is close to that of the powder, and the effect of improving wear resistance becomes insufficient. If the aspect ratio exceeds the above range, uniform dispersion in the composition is difficult, which is not preferable.

The reason why the blending ratio of the aromatic polyamide resin used in the present invention is limited to 2 to 20% by volume is that lubricity is poor at less than 2% by volume and abrasion resistance is deteriorated at more than 20% by volume. Is.

Next, the flake graphite in the present invention may be either natural graphite or artificial graphite, but flake graphite having an average particle size of about 10 μm achieves the intended purpose of the present invention. Is particularly preferred. As commercially available flaky graphite, Nippon Graphite Co., Ltd .: ACP (fixed carbon amount 99.5%),
LONZA Co. make: KS-6 or KS-10 (fixed carbon 99.5%) etc. can be illustrated.

The compounding ratio of such graphite is 2 to 15% by volume. This is because if the amount is less than 2% by volume, sufficient improvement of lubricity and wear resistance cannot be obtained, and if the amount is more than 15% by volume, the molded product becomes brittle, which is not preferable.

The thermoplastic polyimide resin used in the present invention has a repeating unit represented by the following formula 20 as a main component.

[0071]

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(In the formula, X represents a group selected from the group consisting of a hydrocarbon group having 1 to 10 carbon atoms, a hexafluorinated isopropylidene group, a carbonyl group, a thio group and a sulfone group; _{1 to} R ₄ represent hydrogen, a lower alkyl group, a lower alkoxy group, chlorine or bromine and may be the same or different, Y is an aliphatic group having 2 or more carbon atoms, a cycloaliphatic group, Represents a tetravalent group selected from the group consisting of a monocyclic aromatic group, a condensed polycyclic aromatic group, and a non-condensed polycyclic aromatic group in which aromatic groups are connected to each other directly or by a bridging member. ).

Among such polyimide resins, commercially available polyimide resins (where R _{1 to} R _{4 in} the formula of the above Chemical Formula 20 are all hydrogen) are manufactured by Mitsui Toatsu Chemical Co., Ltd .: A
URUM may be mentioned. The manufacturing method is disclosed in JP-A-61-161.
No. 143478, Japanese Patent Laid-Open No. 62-68817,
It is well known as disclosed in JP-A-62-86021.

The thermoplastic polyimide resin described above can be molded by various types of melt molding such as compression molding, injection molding, and extrusion molding while maintaining the heat resistance peculiar to polyimide.

When such a polyimide resin is blended in an amount of 5 to 30% by volume, it is effective in improving the heat resistance and mechanical properties of the heat-resistant / lubricating resin composition of the present invention, especially the strength and fatigue properties at high temperatures. There is. However, in small amounts less than 5% by volume,
The effect of improving the strength becomes small, and if a large amount exceeding 30% by volume is compounded, the injection moldability deteriorates.

The polyphenylene sulfide resin (hereinafter abbreviated as PPS resin) used in the present invention is as follows.
Examples of the synthetic resin include various repeating units represented by the following chemical formula 21.

[0077]

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A typical example of these is represented by the following chemical formula 22 and is commercially available from Philip Petroleum Company, USA under the trade name "Ryton".

[0079]

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The manufacturing method of this product has already been disclosed in Japanese Patent Publication No.
As is well known in, for example, Japanese Patent No. 3368, it is produced by reacting p-dichlorobenzene with sodium disulfide in a N-methylpyrrolidone solvent under a pressure condition of 160 to 250 ° C. In this manufacturing method, by the post-heat treatment step, it is possible to manufacture resins having various degrees of polymerization from those having no cross bonds in the resin to those having partial cross bonds,
A melt blend having the composition of the present invention having suitable melt viscosity characteristics is obtained. Further, a linear PPS resin that does not have a cross-linked structure and that is a PPS resin other than that shown in Chemical Formula 22 may be used.

When the above PPS resin is blended in an amount of 5 to 30% by volume, it is effective in improving the melt fluidity and mechanical properties of the composition of the present invention. However, in small amounts less than 5% by volume,
The effect of improving the fluidity becomes small, and addition of a large amount exceeding 30% by volume deteriorates heat resistance and friction and wear characteristics under high temperature conditions, which is not preferable.

When a thermotropic liquid crystal polymer having the basic structure of (I) to (III) of the following Chemical Formula 23 is added as an additive other than the above, the flowability at the time of melt molding and the crystallization at the time of crystallization can be improved. The contraction rate can be relaxed. However, since this compound has a harmful effect of impairing wear resistance, it is preferable that the compounding ratio thereof be 1 to 5% by volume.

[0083]

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Commercially available products of the thermotropic liquid crystal polymer include Nippon Petrochemical Co., Ltd .: Zaider, Sumitomo Chemical Co., Ltd .: Sumika Super LCP E4000, E5000.
And the like.

Here, PEK resin, PEN or PAI
On the other hand, the method of adding and mixing various additives is not a particularly limited method, and as generally used, various raw materials containing a resin as a main component are individually or collectively used in a Henschel mixer. Dry mixing with a mixer such as a ball mill, tumbler mixer, etc., and then supplying it to an injection molding machine or a melt extrusion machine with good melt mixing properties, or in advance with a hot roll, kneader, Banbury mixer, melt extruder, etc. A method of melt mixing may be adopted.

Further, when the composition of the present invention is molded, a usual method such as compression molding, extrusion molding, injection molding or the like is used, or after the composition is melt-mixed, the composition is jet-milled, freeze-milled or the like. It is also possible to carry out fluidized dip coating, electrostatic powder coating or the like using the obtained powder without crushing and classifying to a desired particle size, or without classifying. It is also possible to disperse the obtained powder in a solvent and perform spray coating or dip coating.

In the present invention, PEK resin, P
Various additives may be added to the lubricating composition containing EN or PAI as a main component. For example, an abrasion resistance improver may be incorporated to further improve the lubricity of the composition.

Specific examples of the wear resistance improver include carbon, mica, talc, wollastonite, metal oxide powder, potassium titanate, titanium oxide, zinc oxide, aluminum borate, calcium carbonate, graphite and sulfuric acid. Examples thereof include whiskers such as calcium, molybdenum disulfide, phosphates, carbonates, stearates and the like.

The heat-resistant plain bearing of the present invention molded from the above-mentioned materials is not limited in its shape, and the shape of the heating / pressurizing roller, the peripheral device, the ring shape adapted to the housing, and other well-known shapes. A plain bearing may be used, and a composite material may be used.

For example, as shown in FIG. 1, the bearing may be a composite material composed of the bearing portion 1 and the fixing metal portion 2 by adopting not only the single material but also the two-color molding method.

As shown in FIG. 2, the heat-resistant slide bearing of the present invention comprises the bearing portion 3 and a heat-resistant and heat-insulating resin such as PPS, polyamide-imide (PAI), polyimide (PI), or the like. It may be a two-color molded bearing composed of a resin portion 4 in which an inorganic filler or an organic filler is added.

[0092]

EXAMPLES The raw materials used in Examples and Comparative Examples of the present invention are collectively shown as follows. The mixing ratio of each component is% by volume.

(1) Polyetherketone resin [PEK-
1] (manufactured by VICTREX: PEEK150P) (2) Polyetherketone resin [PEK-2] (VIC
TREX Co .: PEK220G) (3) Polyetherketone resin [PEK-3] (BAS
Company F: Ultrapek-A1000) (4) Polyether nitrile resin [PEN] (made by Idemitsu Petrochemical Co., Ltd .: PENID300HF) (5) Polyamide imide resin [PAI] (made by Teijin Amoco Engineering Plastics: Torlon 4000TF (6) Thermoplastic polyimide resin [TPI] (Mitsui Toatsu Chemicals Inc .: AURUM # 450) (7) Fluorine resin [PTFE] (Kitamura: KTL)
610) (8) Fluorine resin [PFA] (Asahi Glass Co., Ltd .: Aflon TW3530) (9) Aromatic polyester resin [OBP] (Sumitomo Chemical Co., Ltd .: Sumika Super E101S2) (10) Para-based aromatic polyamide fiber [ARD -1]
(Nippon Aramid: Twaron 1010 cut fiber, fiber length 0.25 mm) (11) Meta aromatic polyamide fiber [ARD-2]
(Manufactured by Teijin Limited: Conex fiber, fiber length 0.25 mm,
(Fibre diameter: about 10 μm) (12) Polyphenylene sulfide resin [PPS-
1] (T4AG manufactured by Topren Co., Ltd.) (13) Polyphenylene sulfide resin [PPS-
2] (Kureha Chemical Co., Ltd .: KPS-W205) (14) Scale-like natural graphite [GRP] (LONZA:
KS-6) [Examples 1 to 19] Raw materials were thoroughly mixed with a Henschel mixer in the proportions shown in Table 1 and supplied to a twin-screw melt extruder.
Cylinder temperature: 340-390 ° C, rotation speed: 100r
Extruded and granulated under melt mixing conditions of pm, the obtained pellets are resin temperature 340-400 ° C., injection pressure 800 kgf
A ring-shaped test piece having an outer diameter of 28 mm, an inner diameter of 20 mm, and a width of 5 mm was formed under the injection molding condition of / cm ² and a mold temperature of 140 to 200 ° C. After molding, the test piece was heat-treated at 260 ° C. for 10 hours. Using this test piece, the following high temperature radial friction and wear test was performed.

[High-Temperature Radial Friction and Wear Test] A rotating shaft made of aluminum alloy A5052 (surface roughness 3.2S) was used as a mating member, and a ring-shaped test piece was fitted around the mating member,
This was pressed against the peripheral surface of the mating material with a pressure of 3.5 kgf / cm ² , the surface temperature of the rotating shaft was controlled to 250 ° C., and a torque meter was attached to the surface of the rotating shaft to obtain a peripheral speed of 9.0.
It was continuously rotated at m / min for 50 hours. After this, the wear coefficient as the wear amount of the test piece × 10 ⁻¹⁰ cm ³ / (kgf ·
m) and the torque (kgf · cm) of the rotating shaft, and the degree of damage to the mating material was observed. Regarding the degree of damage,
The results are shown in a three-stage evaluation of no damage (○ mark), slightly damage (Δ mark) or damage (× mark), and these results are summarized in Table 3.

[0095]

[Table 1]

[0096]

[Table 2]

[0097]

[Table 3]

[0098]

[Table 4]

[Comparative Examples 1 to 8] Test pieces were prepared in the same manner as in Example 1 except that the raw materials were mixed in the proportions shown in Table 2, and the high temperature radial friction and wear test was performed.
The wear coefficient, torque of the rotating shaft, and degree of damage are calculated and the results are shown in Table 4.
It was shown to.

As is clear from the results shown in Tables 3 and 4, Comparative Example 1 in which the proportion of PEK as the main component was excessive, the fluororesin (PTFE) was too small and the aromatic polyester (OBP) was excessive. Comparative Example 2, OBP is too small and aromatic polyamide fiber (ARD-1) is excessive Comparative Example 3, AR
Comparative Example 4 containing D-1 but not OBP, Comparative Example 5 containing OBP but having a small amount of PTFE, Comparative Examples 6 and 7 in which the proportion of PEN or PAI as the main component was excessive, the wear amount,
The rotation torque was large, and the damage to the mating material was large.

In Comparative Example 8 in which the base material was composed of only PPS resin with the same filler composition as in Examples 4, 6, and 11, the amount of wear was relatively small and the degree of damage to the mating material was also slight. However, the test temperature was 250 ° C., which was close to the melting point of the PPS resin, and the rotational torque was large, probably because the adhesive force with the shaft increased.

On the other hand, Examples 1 to 1 satisfying all the conditions
In No. 9, both the wear amount and the rotation torque were low, and the aluminum alloy (A5052) as the mating material was not damaged.

[0103]

The heat-resistant and lubricating resin composition of the present invention comprises:
As described above, the aromatic polyether ketone resin,
Since it is a composition in which a predetermined amount of a fluororesin, an aromatic polyester resin, an aromatic polyamide resin, and a polyphenylene sulfide resin are added, each containing a polycyanoaryl ether resin or a polyamide-imide resin as a main component, it has injection moldability. In addition, it has excellent low friction characteristics and wear resistance, and has the advantage that it has non-aggressiveness when a soft alloy such as an aluminum alloy is used as a sliding partner.

Further, since the sliding bearing made of the resin composition of each of these inventions has all the characteristics such as heat resistance, low friction characteristic, abrasion resistance and non-aggressiveness, it is a copying machine and a laser beam printer. There is also an advantage of being a high-performance synthetic resin heat-resistant sliding bearing in a fixing device such as.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment.

FIG. 2 is a perspective view showing another embodiment.

FIG. 3 is a cross-sectional view illustrating a usage state of a bearing in a heating / fixing device.

FIG. 4 is a cross-sectional view illustrating a usage state of a bearing in another heating / fixing device.

[Explanation of symbols]

 1, 3 Bearing part 2 Fixing metal part 4 Resin part 10 Heating roller 11 Pressure roller 12 Heater 13, 14 Synthetic resin sliding bearing 15 Fixing film 16 Ceramic heater

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location F16C 33/20 7123-3J F16C 33/20 A

Claims (11)

[Claims] 1. An aromatic polyether ketone resin, a polycyanoaryl ether resin, or a polyamide-imide resin, 40 to 77% by volume, and a fluororesin 16 to 38.
A heat-resistant / lubricating resin composition comprising as an essential component 5% by volume and 5-25% by volume of an aromatic polyester resin. 2. An aromatic polyether ketone resin, a polycyanoaryl ether resin, or a polyamideimide resin, 20 to 72% by volume, and a fluororesin 16 to 38.
A heat-resistant / lubricating resin composition comprising as an essential component 5% by volume, 5-25% by volume of an aromatic polyester resin and 5-30% by volume of a thermoplastic polyimide resin. 3. An aromatic polyetherketone resin, a polycyanoaryl ether resin or a polyamide-imide resin in an amount of 20 to 72% by volume and a fluororesin of 16 to 38.
A heat-resistant / lubricating resin composition comprising, as an essential component, 5% to 25% by volume of an aromatic polyester resin and 5% to 30% by volume of a polyphenylene sulfide resin. 4. An aromatic polyetherketone resin, a polycyanoaryl ether resin or a polyamideimide resin, 40 to 87% by volume, a fluororesin 8 to 38% by volume, an aromatic polyester resin 3 to 25% by volume and an aromatic. A heat-resistant and lubricating resin composition comprising 2 to 20% by volume of group polyamide fiber as an essential component. 5. An aromatic polyetherketone resin, a polycyanoaryl ether resin or a polyamideimide resin, 20 to 80% by volume, a fluororesin 8 to 38% by volume, an aromatic polyester resin 3 to 25% by volume, and an aromatic. A heat-resistant and lubricating resin composition comprising 2 to 20% by volume of a group polyamide fiber and 5 to 30% by volume of a thermoplastic polyimide resin as essential components. 6. An aromatic polyetherketone resin, a polycyanoaryl ether resin or a polyamide-imide resin, which is 20 to 80% by volume, a fluororesin 8 to 38% by volume, an aromatic polyester resin 3 to 25% by volume, and an aromatic. A heat-resistant and lubricating resin composition comprising 2 to 20% by volume of a group polyamide fiber and 5 to 30% by volume of a polyphenylene sulfide resin as essential components. 7. The heat-resistant / lubricating resin composition further comprising 2 to 15% by volume of flake graphite.
The heat resistant / lubricating resin composition according to any one of 1. 8. The aromatic polyetherketone resin comprises:
An aromatic polyether ketone resin containing a repeating unit represented by the following chemical formula 1, chemical formula 2 or chemical formula 3.
7. The heat resistant / lubricating resin composition according to any one of 7 above. Embedded image Embedded image Embedded image 9. The heat resistant / lubricating resin composition according to claim 1, wherein the fluororesin is polytetrafluoroethylene. 10. The aromatic polyester resin is a resin containing a repeating unit represented by the formula (4) below.
The heat-resistant / lubricating resin composition according to any one of items 1 to 7. Embedded image 11. A heat-resistant plain bearing formed by molding the heat-resistant / lubricating resin composition according to any one of claims 1 to 10.