JPH10298441A - Resin composition for sliding material and resin-made gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin compsn. excellent in abrasion resistance by compounding a resin with a solid lubricant, a whisker having a Mohs hardness lower than a specified value, and a whisker having a Mohs hardness of the specified value or higher. SOLUTION: This compsn. contains 100 pts.wt. at lest one resin selected from among polyarylene sulfide resins, polyetherketone resins, and thermoplastic polyimide resins, 5-100 pts.wt. solid lubricant (e.g. polytetrafluoroethylene), and 5-250 pts.wt. whisker material comprising a whisker having a Mohs hardness lower than 5 and a whisker having a Mohs hardness of 5 or higher. The whisker material has an average aspect ratio of 10 or higher and a fiber length of 100 μm or lower and is prepd. by compounding 100 pts.wt. whisker having a Mohs hardness of 5 or higher and selected from among aluminum borate whisker, titanium oxide whisker, mineral fibers, etc., with 100-1,000 pts.wt. whisker having a Mohs hardness lower than 5 and selected from among wollastonite whisker, calcium carbonate whisker, potassium titanate whisker, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin composition for a sliding material, and more particularly to a resin composition for a sliding material which can be applied to members requiring abrasion resistance such as sliding bearings and gears.

[0002]

2. Description of the Related Art In recent years, resin sliding bearings and resin gears obtained by molding a resin composition for a sliding material into office equipment such as audio equipment and copying machines, automobile parts and other mechanical parts have been developed. It is heavily used. Compared to metal plain bearings and gears, although they cannot be used under extremely high loads or high temperatures, they can be reduced in weight, cost, greaseless, and integrated with composite parts. The usage of resin sliding bearings and resin gears is increasing.

[0003] The characteristics required for a resin sliding bearing or a resin gear include its own abrasion resistance and low aggression to a mating material.
That is, it is necessary to reduce both the wear amount of the partner material due to sliding with the partner material and the wear amount of the partner material, but these two characteristics have contradictory surfaces. For example, in a resin composition for a sliding material mainly composed of polyphenylene sulfide resin, if a fibrous filler is not added, the wear amount of the resin itself becomes extremely large.
However, in this case, when the mating material is a soft material, for example, aluminum or a synthetic resin material, the glass fiber is relatively hard, so that the aggressiveness increases and the mating material tends to wear more. On the other hand, when a relatively soft filler such as carbon fiber is blended, the aggressiveness to the mating material is reduced, but the strength of the resin gear is reduced and the wear amount of the resin gear is increased.

As a resin composition for a sliding material which addresses such conflicting problems, Japanese Patent Application Laid-Open Nos.
No. 6-279689 is known. For example,
No. 306371 discloses a composition comprising a polyphenylene sulfide resin, a polytetrafluoroethylene resin, an aromatic polyamide pulp, and zinc oxide whiskers,
Japanese Patent Application Laid-Open No. 6-279689 discloses a composition comprising synthetic resin, whiskers, aromatic polyamide fiber and solid lubricant.

[0005]

However, in recent years, in office equipment and the like, it has become important to reduce the size and weight of the equipment and to reduce noise during operation of the equipment as much as possible. However, there is a problem that a resin sliding bearing or a resin gear that can sufficiently cope with the reduction in size and weight of the device and the noise reduction cannot be obtained. For example, aromatic polyamide pulp and aromatic polyamide fiber are bulky fillers having a small apparent specific gravity, so that the process conditions are limited in the granulation process and the injection molding process of the resin composition, and the purpose is to reduce the size and weight. There is a problem that molding cannot be performed depending on the complicated product shape.

In addition, aromatic polyamide pulp and aromatic polyamide fiber tend to contaminate a mold because gas is generated during injection molding. For this reason, the mold must be cleaned every predetermined number of times, and there is a problem that continuous molding is difficult.

Further, aromatic polyamide pulp and aromatic polyamide fiber are highly hygroscopic materials, and if the drying step of pellets is not performed properly before injection molding, problems such as foaming may occur in molded products. is there. For this reason, there is a problem that the production cost is increased due to an increase in the number of steps together with the inherent high cost of the material, and the industrial utility as a resin sliding bearing or a resin gear is limited.

On the other hand, in office equipment which requires noise reduction measures, greases are applied to iron-based sintered gears used in parts exposed to high loads and high temperatures to prevent the gears from being bitten. Often. In this case, when the grease propagates and adheres to the resin gear, the resin abrasion powder generated by the wear of the resin gear and the dropped fibrous reinforcing material are captured by the grease and act like an abrasive at the sliding interface. However, there is also a problem that the other member causes very large wear. This is a problem that is particularly noticeable when glass fiber or the like is used as a reinforcing material.

The present invention has been made to address such problems, and has high mechanical strength, excellent abrasion resistance regardless of the presence or absence of grease, and can be used not only for iron-based non-soft materials but also for soft materials. An object of the present invention is to provide a resin composition for a sliding material and a resin gear, which have a low aggressiveness, are easy to mold, and provide a resin molded article having high industrial utility.

[0010]

SUMMARY OF THE INVENTION The resin composition for a sliding material of the present invention is a resin composition for a sliding material comprising a resin and at least a solid lubricant and a whisker material. Is characterized by including whiskers having a Mohs hardness of less than 5 and whiskers having a Mohs hardness of 5 or more. Further, the whisker material is characterized in that the compounding amount of the whisker having a Mohs hardness of less than 5 is larger than that of the whisker having a Mohs hardness of 5 or more.

The whiskers having a Mohs hardness of less than 5 are at least one whisker selected from wollastonite whiskers and calcium carbonate whiskers, and the whiskers having a Mohs hardness of 5 or more are at least one whisker selected from aluminum borate whiskers and mineral fibers. It is a whisker.

[0012] The resin constituting the resin composition for a sliding material is characterized in that it is at least one resin selected from a polyarylene sulfide resin, a polyether ketone resin and a thermoplastic polyimide resin.

[0013] The solid lubricant constituting the resin composition for a sliding material is polytetrafluoroethylene.

The resin gear of the present invention is characterized in that it is a resin gear made of a molded product of the above resin composition for a sliding material.

The resin composition for a sliding material according to the present invention improves the fluidity of the resin composition by mixing whiskers having different Mohs hardnesses. In addition, regardless of the presence or absence of grease, it is less likely to attack the mating material during sliding, and is excellent in its own wear resistance.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The resin according to the present invention can be arbitrarily selected according to the heat-resistant temperature, atmosphere and other conditions required for a sliding member. For example, polyacetal resin, polyamide resin, polyethylene resin, polyimide resin, polyamideimide resin, thermoplastic polyimide resin, polyetheretherketone resin, polyetherketone resin, polyethernitrile resin, aromatic polyester resin, phenolic resin, epoxy resin, Examples include polyphenylene sulfide resin. These can be used singly or as a polymer alloy or polymer blend composed of two or more resins.

Among these, polyarylene sulfide resin such as polyphenylene sulfide resin, polyether ketone resin such as polyether ether ketone resin, and thermoplastic polyimide resin are used for heat resistance, mechanical strength and molding as a sliding member. It is preferable because it has excellent properties. Further, polyphenylene sulfide resin is most preferable because it is more excellent in moldability, and is inexpensive and excellent in industrial utility.

As the polyarylene sulfide resin,
For example, a polyphenylene sulfide resin is a resin having a structure in which aromatic groups are linked by a thioether bond, and its repeating unit is shown in Chemical formula 1.

[0019]

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Of these, the most typical one is
Which is commercially available from Philips Petroleum Corporation under the trademark "Ryton" and is manufactured according to U.S. Pat. No. 3,354,129 (corresponding Japanese Patent
5-3368 ”).

[0021]

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According to that, "Ryton" is N-methyl
-2- p-pyrrolidone in a solvent at 160-250 ° C under pressure
It is produced by reacting dichlorobenzene with sodium disulfide. In this case, resins with various degrees of polymerization, from those without any cross-linking structure to those with partial cross-linking structure in the resin, can be freely manufactured by post-heat treatment, making it suitable for the target melt blend. It is possible to arbitrarily select and use those having excellent melt viscosity characteristics. Further, other than the above, a linear polyphenylene sulfide resin having no crosslinked structure may be employed.

The melt viscosity of the polyphenylene sulfide resin at 300 ° C. is 10 to 10,000 Pa · s, preferably 30 to 3,
000 Pa · s, more preferably 30 to 1,000 Pa · s, and most preferably 50 to 800 Pa · s. Further, a resin in which an SH group is introduced into a terminal of a polyphenylene sulfide resin may be used. Commercially available products of such polyphenylene sulfide resin include T4AG (Topren Co., trade name), B160 (Tosoh Co., trade name), KPS W21
4 (Kureha Chemical Industry Co., Ltd., trade name) and the like.

The polyetherketone-based resin is a resin having a repeating unit represented by the following formula (3) or a repeating unit represented by the following formula (4) together with such a repeating unit does not lose the original characteristics of the polyetherketone-based resin. It refers to a resin that coexists to a certain extent.

[0025]

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[0026]

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A commercially available product of such a polyetherketone resin is PEEK150P represented by the following formula (5).
(VICTREX, trade name), PEK220G (ICI, trade name) represented by the following chemical formula 6, UltrapekA2000 (BASF) represented by the following chemical formula 7
Company, product name). These production methods are described, for example, in JP-A-54-90265.

[0028]

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[0029]

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[0030]

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The thermoplastic polyimide resin has a moderate property due to the application of energy such as heat while the imide group having excellent thermal characteristics and mechanical strength surrounds the aromatic group in the repeating unit of the molecular structure. An imide-based resin having a structure having a plurality of ether bond portions exhibiting melting characteristics is good,
In order to satisfy mechanical properties, rigidity, heat resistance, and injection moldability, a thermoplastic polyimide resin having two ether bond portions in a repeating unit is preferable. For example, aromatic ether diamines and aromatic ether diisocyanates and the like, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, biphenyl tetracarboxylic anhydride and the like
Resins obtained by reaction with one or more acid anhydrides or derivatives thereof can be mentioned.

Specifically, an example of a polymer having an imide group and an aromatic group is shown in Chemical formula 8.

[0033]

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(Wherein X represents a group selected from the group consisting of a directly bonded or C 1-10 hydrocarbon group, a hexafluorinated isopropylidene group, a carbonyl group, a thio group and a sulfone group; _{1 to} R ₄ represent hydrogen, a lower alkyl group (preferably having 1 to 5 carbon atoms), a lower alkoxy group (preferably having 1 to 5 carbon atoms), chlorine or bromine, and may be the same or different from each other; Y is an aliphatic group having 2 or more carbon atoms, a cycloaliphatic group, a monocyclic aromatic group, a condensed polycyclic aromatic group, or a non-condensed polycyclic group in which aromatic groups are connected directly or by a cross-linking group. Represents a tetravalent group selected from the group consisting of cyclic aromatic groups.)

The thermoplastic polyimide resin represented by the chemical formula 8 can be obtained, for example, by dehydrating and cyclizing a polyamic acid obtained by reacting an aromatic ether diamine represented by the following chemical formula 9 with one or more aromatic tetracarboxylic dianhydrides. Obtained.

[0036]

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(Wherein X represents a group selected from the group consisting of a directly bonded or C 1-10 hydrocarbon group, a hexafluorinated isopropylidene group, a carbonyl group, a thio group and a sulfone group; _{1 to} R ₄ represent hydrogen, a lower alkyl group (preferably having 1 to 5 carbon atoms), a lower alkoxy group (preferably having 1 to 5 carbon atoms), chlorine or bromine, and may be the same or different from each other; Among such thermoplastic polyimide resins, commercially available products include AURUM (trade name, manufactured by Mitsui Chemicals, Inc.) in which all of R _{1 to} R _{4 in} Chemical Formula 8 are hydrogen.

Examples of the solid lubricant include fluororesins such as polytetrafluoroethylene (hereinafter abbreviated as PTFE), graphite, molybdenum disulfide and the like, and these can be used alone or in combination. . In particular, PTFE is most excellent in lubricity and can be suitably used. As the PTFE, any of a molding powder by a suspension polymerization method and a fine powder by an emulsion polymerization method can be used (hereinafter, the molding powder and the fine powder are abbreviated as virgin PTFE). Further, virgin PTFE which has been crushed after being pressurized and heated, or virgin PTFE which has been crushed after being pressurized and heated and then irradiated with γ-rays (hereinafter, these are abbreviated as regenerated PTFE) can be used.

Virgin PTFE, when granulating a resin composition, has a bad effect on granulation because it is fiberized, but if it is used in a small amount, it has a reinforcing effect, so it can be used in combination with recycled PTFE and other solid lubricants. It is preferred to use. The mixing ratio of these solid lubricants in the resin composition for a sliding material is 5 to 100 parts by weight, preferably 5 to 80 parts by weight, per 100 parts by weight of the resin. Within this range, other properties can be maintained and lubricity can be improved.

The whisker material according to the present invention represents a short fiber material having an average aspect ratio of 10 or more and a fiber length of 100 μm or less. In the present invention, a whisker having a Mohs hardness of less than 5 and a whisker having a Mohs hardness of 5 or more are used. Use a mixture of two or more. Whiskers with a Mohs hardness of less than 5 have a small reinforcing effect on, for example, resin gears, but are not likely to cause abnormal wear due to their softness even with grease. On the other hand, whiskers having a Mohs' hardness of 5 or more have a large reinforcing effect, but tend to cause abnormal wear. The resin composition for a sliding material of the present invention is a mixture of a whisker having a Mohs hardness of less than 5 and a whisker having a Mohs hardness of 5 or more. Balance. Since the Mohs hardness described in the present application is based on Mohs hardness 5, any of the evaluation criteria of the new Mohs hardness and the old Mohs hardness may be adopted. Is evaluated based on

The whiskers having a Mohs hardness of less than 5 include wollastonite whiskers (Mohs hardness 4.5), calcium sulfate whiskers (Mohs hardness 3), calcium carbonate whiskers (Mohs hardness 3.5 to 4), and potassium titanate whiskers (Mohs hardness 3.5). ). Among these, wollastonite whiskers and / or calcium carbonate whiskers are preferred because of their high reinforcing effect and relatively low cost.

As whiskers having a Mohs hardness of 5 or more, aluminum borate whiskers (Mohs hardness 7 to 7.5), magnesium borate whiskers (Mohs hardness 5.5), titanium oxide whiskers (Mohs hardness 7 to 7.5), silicon nitride whiskers (Mohs Hardness 9), silicon carbide whiskers (Mohs hardness 9), alumina whiskers (Mohs hardness 9), mineral fibers obtained by melting and processing and refining igneous rock (Mohs hardness 6). Among these, aluminum borate whiskers and mineral fibers are preferred because of their relatively long shape and high reinforcing effect.

The two or more whiskers having different Mohs hardnesses are obtained by converting whiskers having a Mohs hardness of less than 5 to a Mohs hardness of 5 or less.
If the whisker is blended in a larger amount, abnormal wear is less likely to occur even when grease is used while the reinforcing effect is still large. A preferable mixing ratio of two or more whiskers having different Mohs hardnesses is 100 to 1000 parts by weight of whiskers having a Mohs hardness of 5 or more, where the total amount of whiskers having a Mohs hardness of 5 or more is 100 parts by weight. More preferably, when the total amount of whiskers having a Mohs hardness of 5 or more is 100 parts by weight, the total amount of whiskers having a Mohs hardness of less than 5 is
150 to 500 parts by weight.

The mixing ratio of these whiskers in the resin composition for a sliding material is 5 to 250 parts by weight per 100 parts by weight of the resin.
Parts by weight, preferably from 10 to 150 parts by weight, more preferably from 20 to 100 parts by weight. When it is in the range of 5 to 250 parts by weight, the reinforcing effect and the wear resistance of the molded article itself are improved. Further, the resin composition for a sliding material of the present invention has improved moldability as compared with a resin composition using a whisker material and an aromatic polyamide fiber material in combination.

Such a composition is suitable as a composition for a slide bearing or a gear, more specifically, an idler gear in which the inner diameter portion of the gear rotates and slides. The application parts of such mechanical components include, for example, a toner image transfer type wet electrostatic copying machine, a dry electrostatic copying machine (PPC), a laser beam printer (LBP), a liquid crystal shutter (LCD) printer, a facsimile machine. (FAX) printer, light emitting diode (LED), silver halide photographic printer (CR
T), etc., and can be applied to all image forming apparatuses such as printers and printing machines. Also,
Mechanical parts such as a sliding bearing, a gear, and a gear having a sliding bearing (for example, an idler gear) made of the resin composition of the present invention can be used in any location in an image forming apparatus such as a photosensitive section, a developing section, and a fixing section. Can be. However, considering the excellent heat resistance of, for example, polyarylene sulfide resin, polyether ketone resin, thermoplastic polyimide resin, etc., it is used in the vicinity of the fixing part used at a higher temperature than the photosensitive part and the developing part. It is suitable as a mechanical component.

FIG. 1 shows an example of a resin gear. FIG. 1 is a partially enlarged perspective view of the vicinity of a fixing unit in the image forming apparatus. In FIG. 1, 1 is a drive gear, 2 is a fixing roller gear, 3 is an idler gear, 4 is a discharge roller gear, 5
Denotes a heater, 6 denotes a paper discharge roller, and 7 denotes a fixing roller. When the resin gear of the present invention is used in the vicinity of such a fixing section, excellent mechanical strength and abrasion resistance even when used at a higher temperature than in the vicinity of the developing section, and the property of hardly attacking a partner material during sliding are maintained. can do.

[0047]

EXAMPLES The raw materials used in the examples and comparative examples are collectively shown below. In addition, the symbol or chemical symbol in Table 1 is shown in [], and all the mixing ratios are parts by weight. (1) Resin 1: Polyphenylene sulfide resin [PP
S]: # B160 (trade name, manufactured by Tosoh Corporation) (2) Resin 2: Polyimide resin [PI]: Aurum 45
0 (trade name, manufactured by Mitsui Chemicals, Inc.) (3) Resin 3: Polyetheretherketone resin [PE
EK]: PEEK150P (trade name, manufactured by Victrex) (4) Whisker 1: wollastonite whisker [CaS
iO ₃ ]; Mohs hardness 4.5: Chemolit ASB8 (trade name, manufactured by Maruwa Biochemical Co., Ltd.) (5) Whisker 2: Calcium carbonate whisker [CaCO
₃ ]; Mohs hardness 4: Whiscal AS3 (trade name, manufactured by Maruo Calcium Co., Ltd.) (6) Whisker 3: Calcium sulfate whisker [CaSO
₄ ]; Mohs hardness 3: Franklin fiber A30
(7) Whisker 4: Aluminum borate whisker [9A
_{l 2 O 3 · 2B 2 O} 3]; Mohs hardness of 7: Alborex Y (Shikoku Chemicals Corporation, trade name) (8) Whisker 5: mineral fibers _{[SiO, Al 2 O 3]} ;
Mohs hardness 6: Rapinas Rockfill RF5104 (trade name, manufactured by Rapinas Fibers) (9) Solid lubricant 1: Recycled PTFE [PTFE-1]:
KT400H (trade name of Kitamura Co., Ltd.) (10) Solid lubricant 2: Virgin PTFE [PTFE-
2]: TEFLON-7J (trade name, manufactured by DuPont) (11) Aromatic polyamide fiber: [ARPA]: Conex cut fiber 1 mm (trade name, manufactured by Teijin Limited) (12) Carbon fiber: [CF]: Crecachop M104
T (product name made by Kureha Chemical Industry Co., Ltd.)

Examples 1 to 6 and Comparative Examples 1 to 4 The above-mentioned raw materials were blended in the proportions shown in Table 1 and thoroughly mixed with a Henschel mixer, and then supplied to a twin-screw extruder to pelletize pellets. The obtained pellets were supplied to an injection molding machine, and each test piece was molded using a predetermined mold, and the following evaluation was performed.

A. Friction and wear test Using a friction and wear tester, outer diameter φ 21 mm, inner diameter φ 17 mm,
Coefficients of friction and wear were measured on 10 mm high test specimens. The test conditions were a sliding speed of 6 m / min. And a surface pressure of 5 kgf / c.
m ² , an ambient temperature of 120 ° C., and a test time of 100 hours, using a rolled steel (SS41) as a mating material, and performing no lubrication.

B. Gear endurance test Using an in-house power absorption type gear endurance tester, slide the examples and comparative examples on idler gears (module = 1, number of teeth = 35, tooth width = 8) whose inner diameter part rotates and slides. A gear made of a resin composition for materials is used, and glass fiber reinforced PPS is used for the drive gear (module = 1, number of teeth = 35, tooth width = 8).
Gear consisting of a load gear (module = 1, number of teeth = 3
5. Gears made of polyacetal resin were adopted for tooth width = 8). The test conditions were as follows: the drive shaft rotation speed was 125 rpm and the load torque was 2.5 kg so as to conform to the specifications at the fixing part for copying machines.
It was operated continuously for 500 hours at f-cm and an ambient temperature of 150 ° C. Grease was applied to the surface of the drive gear at the start of the test to provide grease lubrication. The wear amount (mg) of the idler gear, drive gear and load gear after the test was measured.

C. Moldability The injection molding of the above-mentioned test piece of the resin composition for a sliding material having the composition shown in Table 1 was observed to evaluate whether or not the test piece was easily formed. 1000 shots of continuous molding were performed, and the evaluation was evaluated as "O" if continuous molding was possible, and "X" if continuous molding was impossible.

[0052]

[Table 1]

As is evident from the test results in Table 1, Examples 1 and 2 in which whiskers having a Mohs 'hardness of 5 or more and a Mohs' hardness of less than 5 were blended in an appropriate amount exhibited low abrasion and good aggressiveness to the other party. Furthermore, it has excellent moldability. Mohs hardness 5
Comparative Example 1 in which the above and an appropriate amount of whiskers having a Mohs hardness of less than 5 were blended, but an aromatic polyamide fiber was added,
The moldability is poor and the manufacturing cost is about
30% more expensive. In Comparative Example 2, in which only whiskers having a Mohs hardness of less than 5 were blended, a part of the gear teeth was broken because the reinforcing effect was small. In Comparative Example 3, in which only whiskers having a Mohs hardness of 5 or more were blended, the aggressiveness of the mating gear made of polyacetal resin was high. In Comparative Example 4 in which carbon fibers were blended instead of the whiskers, the wear resistance of itself and the partner was extremely reduced.

[0054]

The resin composition for a sliding material of the present invention comprises a solid lubricant and a whisker having a Mohs hardness of less than 5 and a Mohs hardness of 5 or less.
By including the above whiskers, a sliding member having excellent mechanical strength and abrasion resistance and having a property of hardly attacking a partner material during sliding can be obtained.

When the amount of the whisker having a Mohs hardness of less than 5 is larger than that of the whisker having a Mohs hardness of 5 or more,
If the whisker with a Mohs hardness of less than 5 is wollastonite whisker and the whisker with a Mohs hardness of 5 or more is aluminum borate whisker, the resin is a polyphenylene sulfide resin, or a combination of these, Is more improved. As a result, by molding the resin composition for a sliding material of the present invention, a resin sliding bearing or a resin gear having excellent mechanical strength and abrasion resistance, properties of hardly attacking a partner material during sliding can be obtained. can get.

[Brief description of the drawings]

FIG. 1 is a partially enlarged perspective view of the vicinity of a fixing unit in an image forming apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive gear 2 Fixing roller gear 3 Idler gear 4 Roller gear 5 Heater 6 Discharge roller 7 Fixing roller

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16H 55/06 F16H 55/06

Claims (7)

[Claims] A sliding material resin composition comprising a resin and at least a solid lubricant and a whisker material,
The resin composition for a sliding material, wherein the whisker material includes a whisker having a Mohs hardness of less than 5 and a whisker having a Mohs hardness of 5 or more. 2. The resin composition for a sliding material according to claim 1, wherein the amount of the whisker having a Mohs hardness of less than 5 is larger than the amount of the whisker having a Mohs hardness of 5 or more. 3. The resin for a sliding material according to claim 1, wherein the whisker having a Mohs hardness of less than 5 is at least one whisker selected from wollastonite whiskers and calcium carbonate whiskers. Composition. 4. The slide according to claim 1, wherein the whisker having a Mohs hardness of 5 or more is at least one whisker selected from aluminum borate whiskers and mineral fibers. A resin composition for a moving material. 5. The resin according to claim 1, wherein said resin is at least one resin selected from a polyarylene sulfide resin, a polyether ketone resin and a thermoplastic polyimide resin. The resin composition for a sliding material according to claim 1. 6. The solid lubricant according to claim 1, wherein said solid lubricant is polytetrafluoroethylene.
The resin composition for a sliding material according to any one of the above. 7. A resin gear formed from a molded product of a resin composition, wherein the resin composition is the resin composition for a sliding material according to any one of claims 1 to 6. Characteristic resin gear.