JP3527559B2 - Separating claw for copier - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separating claw for a copying machine.

[0002]

2. Description of the Related Art Generally, in a copying machine, an electrostatic latent image formed on the surface of a photosensitive drum corresponding to characters or figures is converted into a toner image and then the toner image is supplied from a paper feed cassette. A mechanism is incorporated in which the toner image and the paper fiber are fused by transferring the toner image onto the paper surface and further heating and pressing the surface by a heated fixing roller to fix the transferred toner image on the paper surface. Then, a method is adopted in which the end of the copy paper is scooped while the tip of the separation claw is in close contact with the outer peripheral surface of the roller so that the copy paper that has passed through the fixing roller is surely discharged without being wound around the roller. Such a separating claw for a copying machine has a small frictional resistance against the outer peripheral surface of the roller and does not damage the surface, has sufficient mechanical strength, especially high-temperature rigidity, and has a sufficient cutting edge or especially its tip shape. It is required that various characteristics such as high accuracy be obtained and that the toner not be adhered.

Particularly in recent years, with the increase in copying speed,
In many cases, the heating temperature of the fixing roller is set to a higher temperature, and the separation claw is required to have heat resistance of about 250 ° C. or higher, and sometimes about 300 ° C. or higher.

Here, a polyimide resin is known as a resin having excellent heat resistance. This resin has excellent properties, but is generally fragile and has insufficient thermal shock resistance, has a high softening temperature and is insoluble in a solvent. Therefore, its molding was difficult. For example

[0005]

[Chemical 2]

A polyimide resin having a basic skeleton represented by (Dupont Co .; Kapton Vespel, etc.)
Is a polyimide resin that does not have a clear glass transition temperature and has excellent heat resistance, but when used as a molding material, injection molding is difficult, and it is inferior in practicality as a molding material for separating claws. It was a thing.

By improving the molding processability of such a polyimide resin, an injection-moldable polyimide has recently been developed,
The separating claw was also proposed (JP-A-1-257884).

[0008]

However, the separating claw for a copying machine made of the above-mentioned polyimide resin has insufficient abrasion resistance. And, in order to improve this defect, potassium titanate fiber or the like is added as a filler. However, if the filling amount is increased, the formability is deteriorated.

Further, the conventional separating claw made of a polyimide resin has not been improved in impact resistance and fatigue resistance under high temperature conditions, and therefore, when repeatedly hitting a high temperature roller,
There is also a problem that deformation is likely to occur due to "chips" or fatigue due to repeated loading.

Here, aluminum borate whiskers and potassium titanate whiskers are well known as general-purpose fiber reinforcing materials to be added to resins, but when these are added to the polyimide to form a separating claw, it is sharpened. The tip of the nail is not fully filled with the reinforcing material, and the desired reinforcing effect cannot be exhibited.

Therefore, the present invention solves the above-mentioned problems, and satisfies the injection moldability of the separating claw for a copying machine by using a predetermined polyimide resin as a matrix, and particularly, the heat resistance and wear resistance of the tip portion, It is an object to have excellent impact resistance and fatigue resistance.

[0012]

In order to solve the above-mentioned problems, in the present invention, the separating claw for a copying machine is made of polyimide resin of 50 to 90% by weight consisting of a repeating unit represented by the following formula (3). , Titanium oxide whiskers 10-50
The means of forming from a molded body of the resin composition containing the weight% was adopted.

[0013]

[Chemical 3]

Alternatively, a separating claw for a copying machine, which comprises a molded body of a resin composition obtained by adding 5 to 30% by weight of a filler having a thermal decomposition temperature not lower than the melting point of the predetermined polyimide resin to the above resin composition. Of.

Further, it is also possible to employ means for molding a separating claw from a molded body obtained by adding 5 to 30% by weight of a solid lubricant to the above resin composition.

The details will be described below. The polyimide resin represented by the above formula 3 used in the present invention is obtained by imidizing 4,4′-bis (3-aminophenoxy) biphenyl and pyromellitic dianhydride as raw materials, It exhibits thermoplasticity. Commercially available products of such polyimide resins are manufactured by Mitsui Toatsu Chemicals;
Aurum etc. are mentioned.

The titanium oxide whiskers used in the present invention are
A rutile type white needle crystal represented by the chemical formula TiO ₂ ,
Average fiber diameter about 0.05-3 μm, average fiber length about 1-10
It is preferably 0 μm. More preferably, the average fiber diameter is about 0.05 to 0.5 μm and the average fiber length is about 1 to 30 μm.
May be

In order to further improve the reinforcing effect of such titanium oxide whiskers, it is effective to improve the wettability and bonding property between the titanium oxide whiskers and the matrix polyimide resin by surface treatment with a coupling agent. Is. The coupling agent used in this case is
Silicon type, titanium type, aluminium type, zirconium type, zirco aluminum type, chromium type, boron type, phosphorus type, amino acid type and the like.

The amount of the titanium oxide whiskers blended is 10 to 10 with respect to the total amount of the polyimide resin and titanium oxide whiskers.
50% by weight is suitable, and a particularly preferable blending ratio is 1
It is 0 to 40% by weight. This is because when the titanium oxide whisker is less than 10% by weight, a sufficient reinforcing effect cannot be obtained, and when it exceeds 50% by weight, a uniform composition cannot be obtained at the time of mixing and the fluidity of the resin is lost. Molding becomes difficult.

Examples of the filler having a thermal decomposition temperature higher than the melting point of the predetermined polyimide resin used in the present invention include a thermosetting resin or a thermoplastic resin having such a thermal decomposition temperature.

The thermal decomposition temperature mentioned here can be measured by gravimetric analysis or the like as a differential thermal decomposition starting temperature. Specifically, it is obtained by thermal analysis (DSC, DTA, TGA, etc.) by a thermobalance weighing curve (TG), a differential thermal analysis curve (DTA), etc., and an initial sample piece (for example, about 5 mg) is heated at a heating rate of about 10
Approximately 5m on the sample piece by heating in air at ℃ / min
It can be determined by using the temperature at which the weight loss of g has occurred as a guide.

Examples of thermosetting resins which can satisfy such a thermal decomposition temperature include phenol resins, urea resins, melamine resins, unsaturated polyester resins, diallyl phthalate resins, epoxy resins and silicon resins. , Polyurethane-based resins, furan-based resins, polyimide-based resins, and the like, and the polyimide-based resins include condensation-type polyimide resins and bismaleimide-based, terminal nadic acid-based, and acetylene-based addition-type polyimide resins and the like. To be

[0023] Among the above-mentioned thermosetting resins, especially phenolic resins, mechanical properties, heat resistance, cold resistance, dimensional stability, solvent resistance, acid resistance, overall various seen from such as water resistance and price In terms of physical properties, these are excellent in a relatively well-balanced manner, particularly excellent in retaining mechanical strength at high temperatures, and the differential thermal decomposition initiation temperature is about 405 ° C.

Of the phenolic resins, novolac resins, which are relatively excellent in moldability, are used as molding materials, and resol resins are superior in thermal shock resistance to novolac resins. Further, the resol-based one-step molding material is
Compared with the two-step method, it takes a relatively long time to manufacture and has a slow curing speed.

In addition to the phenolic resin, the epoxy resin, silicon resin, and polyimide resin have differential thermal decomposition initiation temperatures of about 390 ° C., about 505 ° C., and about 40 ° C., respectively.
It is 0 to 450 ° C., these are also excellent in mechanical strength at high temperature, and the differential thermal decomposition initiation temperature is about 390 ° C. or higher, preferably about 400 ° C. or higher. Because the molding material is about 3 when pelletizing with a twin-screw melt extruder.
About 390-4 at high temperature of 90-400 ℃ or injection molding
Cylinder temperature of 00 ° C, and then about 250-3
This is because the progress of thermal decomposition is relatively gradual during heat treatment at 40 ° C. and in various manufacturing processes such as firing at about 340 ° C. accompanying PFA resin with coating.

5 to 30% by weight of these thermosetting resins,
It is considered that the impact resistance and wear resistance of the cutting edge of the separating claw can be further improved by preferably adding 5 to 15% by weight.

In this case, if the blending amount of the thermosetting resin is less than 5% by weight, the impact resistance, abrasion resistance, heat resistance and the like are not improved so much. When a predetermined polyimide resin is melted at a relatively high temperature such as about 390 to 450 ° C and injection molding is performed, stable granulation and injection molding due to inconvenience such as progress of thermosetting in the cylinder. This is because it is not possible to expect the reliability and dimensional accuracy.

On the other hand, as a typical example of the above-mentioned thermoplastic resin, there may be mentioned the following fluororesins.
In addition, the thermal decomposition temperature is shown in [].

Polytetrafluoroethylene (PTF
E), [about 508 to 538 ° C.] tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), [about 464 ° C.] tetrafluoroethylene-hexafluoropropylene copolymer (FEP), [about 419 ° C. ] Polychlorotrifluoroethylene (PCTFE)
[About 347 to 418 ° C] Tetrafluoroethylene-ethylene copolymer (ET
FE), [about 347 ° C. or higher] chlorotrifluoroethylene-ethylene copolymer (ECTFE), [about 330 ° C. or higher] polyvinylidene fluoride (PVDF), [about 4
00-475 ° C] Polyvinyl fluoride (PVF), [about 372-
480 ° C.] Tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer (E
PE), [about 440 ° C. or higher].

Further, the above-mentioned fluororesin copolymers, fluoropolyolefins such as terpolymers, and the like may be used, and these also show properties as solid lubricants. Among them, PTFE is preferable because it is excellent in various properties such as heat resistance, chemical resistance, non-adhesiveness, and low friction coefficient.

These fluororesins are also preferable because they have a relatively high differential thermal decomposition initiation temperature. For example, PTFE, P
The decomposition points of VDF are about 490 ° C. and about 350 ° C., respectively, and their differential thermal decomposition initiation temperatures are about 55 ° C., respectively.
It shows 5 ℃ and about 460 ℃, and it is P among the fluororesins.
TFE, PFA and FEP are preferable because they have excellent high temperature characteristics. Therefore, it can relatively withstand the various heat history as described above in the process of manufacturing by separating the separation claw made of a predetermined polyimide. In particular, the decomposition point of PTFE is higher than the melting point of a predetermined polyimide resin, which is preferable. 5 to 30% by weight of these thermoplastic resins, preferably 5 to
By adding 15% by weight, it is considered that the attacking property of the blade edge of the separating claw on the surface of the fixing roller can be reduced and the impact resistance, fatigue resistance, and abrasion resistance can be improved.

If the added amount is less than 5% by weight, these effects cannot be expected, and if the added amount is more than 30% by weight, the melt viscosity of these causes the melt molding during granulation or injection molding as described above. This is because the load on the cylinder of the machine is large and stable granulation, injection moldability and dimensional accuracy cannot be expected.

Incidentally, the melt viscosities of PFA and FEP are about 10 ⁴ to 10 ⁵ poises and about 4 × at about 380 ° C., respectively.
10 ⁴ to 10 ⁵ poise, especially about 34 in PTFE
The thermoplastic resin having a viscosity characteristic of about 10 ¹¹ to 10 ¹² poises at 0 to 380 ° C. and about 10 ⁴ to 10 ¹² poises even at such a high temperature has a high viscosity characteristic. It is preferable because it has excellent heat resistance.

In addition to the titanium oxide whiskers described above as additives to the polyimide resin, needle-like fillers such as potassium titanate whiskers or graphite (graphite), molybdenum disulfide, graphite fluoride, lead monoxide, etc. Lead oxide and other solid lubricants may be added. These lubricants are preferably solid so that they can withstand a predetermined molding temperature of polyimide, and their particle size is 0.1 μm to 800 μm, preferably 10 μm to 5 μm in consideration of moldability.
It may be about 00 μm. In particular, the separating claw filled with graphite or PTFE has a very small frictional resistance with respect to the outer peripheral surface of the roller and improves non-aggressiveness to the roller.

The content of such solid lubricant is preferably 5 to 30% by weight, preferably 10 to 25% by weight of the resin composition, and if the amount of solid lubricant is less than 5% by weight. The non-aggressive effect on the outer peripheral surface of the opposing roller is not sufficient. If the amount of solid lubricant exceeds 30% by weight,
The fluidity of the composition is remarkably lowered, and the heat distortion resistance of the obtained molded article is also remarkably lowered, which is not preferable.

Further, the total amount of the above-mentioned solid lubricant and titanium oxide whiskers is preferably 10 to 60% by weight of the total composition. If the total amount of titanium oxide whiskers and solid lubricant exceeds 60% by weight of the total composition, that is, if the amount of polyimide resin is less than 40% by weight, a uniform composition cannot be obtained and the fluidity of the resin is lost. Molding becomes difficult.
The total amount of titanium oxide whiskers and solid lubricant is 10
If it is less than wt%, a sufficient reinforcing effect cannot be obtained.

When the solid lubricant graphite is added for the purpose of improving non-adhesion to the toner, it is preferably added in an amount of 5 to 30% by weight, preferably 10 to 25% by weight. In this case, if the amount of graphite is less than 5% by weight, the non-adhesive effect is not exerted, and if it exceeds 30% by weight, the melt moldability is unfavorably affected.

Here, the mixing means such as polyimide, titanium oxide whiskers, thermosetting resin, thermoplastic resin and solid lubricant may be supplied individually to the melt mixer, or they may be supplied in advance to a Henschel mixer, The mixture may be dry-mixed with a general-purpose mixer such as a tumbler mixer or a ribbon blender and then supplied to the melt mixer, and its specific method is not particularly limited.

Further, within a range that does not impair the object of the present invention, an antioxidant, a heat stabilizer, an ultraviolet absorber, a lubricant, a release agent, a colorant, a flame retardant, an antistatic agent, a crystallization accelerator, etc. Needless to say, may be added as appropriate.

The molding materials mixed as described above are heated to a temperature range of about 390 to 450 ° C. to be plasticized, and then filled in a mold to be solidified and released, whereby the intended copying machine is obtained. Get a separate nail for. The reason for such high temperature is that the melting point of the predetermined polyimide resin is approximately 388 ° C.
And because it is high temperature. Further, by subjecting the separating claw to a predetermined heat treatment, it is possible to obtain a separating claw for a copying machine which is excellent in heat distortion resistance, dimensional stability and abrasion resistance and has a long life.

This heat treatment is preferably carried out in the range of about 250-340 ° C, preferably about 270-330 ° C. This is because at a temperature above about 340 ° C, the separation claw undergoes significant thermal deformation, which is not preferable for practical use.
This is because improvement in heat distortion resistance cannot be obtained at a temperature lower than 50 ° C.

The heat treatment time greatly changes depending on the heating temperature, and requires at least 2 minutes or more, and in some cases several weeks. That is, there is a certain law in the relationship between the improvement of the heat resistance of the separating nail by the heat treatment in this invention and its change in density, and the density of the polyimide component in the molding material of the separating nail is at least 1.5% or more. The time sufficient for the increase may be the heat treatment time.

Here, the density increase rate of the polyimide component is
The density of the separating claws before and after the heat treatment can be measured according to ASTM-D792, and can be calculated from the compounding ratio and density of each component in the molding material. Regarding the heat treatment time, according to the experimental results of the inventors, 12 hours or more under 270 ° C. heating condition, 1 hour or more under 280 ° C. heating condition, 300
10 minutes or more is required for 340 ° C. heating conditions, 10 minutes or more for 330 ° C. heating conditions, 2 minutes or more for 330 ° C. heating conditions, 33
The required time is minimized under the 0 ° C heating condition.

Further, in the case of heat treatment at 260 ° C. or lower, it takes several weeks or longer, and conversely, in the case of heat treatment at 340 ° C. or higher, the separation claw is remarkably deformed. Not relevant.

Such heat treatment of the separating claw is carried out in a heating device in which the separating claw is controlled to a predetermined temperature, but the type of the heating device is not particularly limited. However, it is usually convenient to use the electric heating method, and as the atmosphere in the apparatus, for example, a hot air circulation type or a hot air circulation type can be used.

Further, in order to impart excellent non-adhesiveness to the surface of the separating nail, a fluorocarbon is applied to the surface of the resin composition of the present invention which is heat-treated to increase the density of polyimide by 1.5% or more. It suffices to coat the resin and melt the coating during firing to form a continuous fluorocarbon resin coating on at least the surface. As the fluorocarbon resin-based coating material at this time, as the enamel type, Chukoh Kasei Kogyo KK: Lighty SF-301 or Daikin Kogyo KK: Toughcoat Enamel TCW-880
9BK etc. can be illustrated. Further, as a type to be fused, a product manufactured by Mitsui DuPont Fluorochemicals:
PFA-X500CL, made by DuPont: By Dax A
R, etc., TFE and its telomer, FEP, P
A low molecular weight powder such as FA or a dispersion may be used.

The coating material may be applied to the surface of the molded article by any of a spray coating method, a dip coating method, an electrostatic coating method and a powder coating method. Further, in this case, it is preferable to preliminarily perform the necessary coating of the primer. The heating device in the firing step may be the same as the above-mentioned heat treatment furnace for polyimide.

The film thickness is preferably about 5 to 40 μm. A thin film of less than about 5 μm has poor wear resistance,
This is because a thick film exceeding m may adversely affect the size of the tip of the cutting edge of the separating claw.

Further, it is also preferable to add a reinforcing material and a lubricant for improving wear resistance to the PFA resin coating material of the fusion type, and for the purpose of preventing static electricity, an antistatic agent such as carbon black. Etc. may be added.

Further, the heat treatment and the baking of the fluorocarbon resin coating may be simultaneously performed. By performing the heat treatment of the separation nail base material and the firing of the fluorocarbon resin coating at the same time, one heat treatment step can be performed.
The work efficiency will be improved and the electricity consumption of the electric furnace will be reduced.

[0051]

Since the separating claw for a copying machine according to the present invention uses a predetermined thermoplastic polyimide resin as a matrix, it can be melt-molded, and furthermore, injection moldability is also satisfied. The titanium oxide whiskers are easily filled in the nail tips, efficiently reinforce the nail tips, and improve heat resistance.

Therefore, the polyimide resin separating claws have excellent wear resistance, and also have extremely excellent impact resistance and fatigue resistance under the condition of being exposed to a high temperature of about 200 ° C. or more. . The heat resistance is improved by using a filler having a thermal decomposition temperature equal to or higher than the melting point of a predetermined polyimide resin. Further, even if a solid lubricant is used in combination, the above excellent properties can be maintained.

[0053]

EXAMPLES The raw materials used in Examples and Comparative Examples are collectively shown below. The mixing ratios of these raw materials are all shown in parts by weight.

(1) Polyimide Mitsui Toatsu Chemical Co., Ltd .: Aurum # 450 (2) Titanium oxide whiskers Ishihara Sangyo Co., Ltd .: FTL300 (3) Aluminum borate whiskers Shikoku Chemical Industry Co., Ltd .: Arbolex-Y (4) Potassium titanate whisker Otsuka Chemical Co., Ltd .: Tismo-N (5) Phenolic resin Kanebo: Bell Pearl C-2000 (6) Tetrafluoroethylene resin [PTFE] Made by Kitamura: KTL-610 (7) Coating primer solution Mitsui DuPont Fluorochemical Co .: MP-902AL (8) PFA liquid for coating Mitsui DuPont Fluorochemical Co .: X500CL.

[Examples 1 to 6 and Comparative Examples 1 to 5] The raw materials were preliminarily dry-mixed in the mixing ratios shown in Table 1 or Table 2, and then the twin-screw melt extruder (PCM-30, manufactured by Ikegai Tekko KK). , And kneaded and extruded under the condition of about 390 to 400 ° C. to granulate. The obtained pellets are supplied to an injection molding machine, the cylinder temperature is 390 to 400 ° C, and the injection pressure is about 1000 kg.
/ Cm ² and a mold temperature of about 180 ° C., injection molding was performed to obtain a separated claw-shaped molded product. This molded product was subjected to heat treatment at about 320 ° C. for 5 hours, further spray-coated with the coating primer solution (7) and then dried, and the PFA coating solution (8) was similarly spray-coated thereon. About 340 ℃,
A test piece was obtained by heating for about 30 minutes and fusion-coated.

With respect to the obtained test pieces, abrasion resistance,
The impact resistance, the fatigue resistance, and the amount of filling the tip of the nail were examined, and the results are also shown in Table 1 or Table 2. The measurement and evaluation methods are as follows.

Abrasion resistance As shown in FIGS. 1 (a) and 1 (b), the separation claw 1 is attached to the mating material S.
Temperature of 196 ± 3 ° C, rotation speed 1 for 45C roller 2
The distance L'from the center of the hole diameter to the tip of the claw before and after the test is slid in contact under the conditions of 48 rpm, load 20 gf, and about 350 hours.
Difference (mm) was measured.

Impact resistance It was measured by using a high impact tester (a schematic diagram is shown in FIG. 2) of the tip of the cutting edge of the separating claw. That is, the lever (length L = 8
(5 mm) with the separation claw 1 mounted on one end and the other end of the lever rotatably supported, and when this is naturally rotated from the upright state to the horizontal state, the tip of the blade tip of the separation claw 1 is a roller. The number of collisions before the separation claw 1 was damaged was measured by colliding with No. 2 under the conditions of a load (W) of 20 gf and a contact angle (θ) of about 100 °. The upper limit of the number of collisions was 20 times.

Fatigue resistance It was measured by using an impact fatigue tester (a schematic diagram is shown in FIG. 3) of the tip of the cutting edge of the separating claw. That is, the separation claw 1 is attached to one end of the lever, the other end of the lever is rotatably supported, and the rotating cam 5 is brought into contact with the lower surface of the lever to intermittently separate the separation claw from the height h = 1 mm. Then, it was allowed to fall naturally and collided with the roller 2. The measurement conditions are as follows: the roller 2 is heated by the heater 4 to a surface temperature of about 200 ° C., the load (W) applied to the tip of the blade of the separation claw 1 is 20 gf, the contact angle (θ) is about 100 °, and the number of collisions is 100,000 times (n = 10), the average value of the deformation amount t (μm, see FIG. 6) was obtained.

Amount of filling the tip of the nail The side surface of the tip of the separating nail is mirror-finished using a lapping machine, and the amount of whisker filled is observed with a scanning electron microscope (SEM). The evaluation was made in three grades, that is, the circles that are marked and the triangles that are hardly filled.

[0061]

[Table 1]

[0062]

[Table 2]

As is clear from the results of Tables 1 and 2, Comparative Example 1 in which the amount of titanium oxide whiskers added was less than the predetermined range was inferior to all of the above-mentioned test items.
On the other hand, in Comparative Example 2 in which the amount of titanium oxide whiskers added was more than the predetermined range, the viscosity during molding was high and injection molding was impossible.
Further, in Comparative Examples 3 to 5 in which aluminum borate whiskers, potassium titanate whiskers, and the like were filled instead of titanium oxide whiskers, the reinforcing effect was not sufficient, and moreover, the nail tips were not filled sufficiently.

On the other hand, Examples 1 to 6 satisfying all the conditions satisfy all the test items such as moldability, wear resistance, impact resistance, fatigue resistance, and the amount of whisker filling the tip of the nail. Excellent results have been obtained.

[0065]

As described above, according to the present invention, since a predetermined thermoplastic polyimide resin is used as a matrix and a separating nail for a copying machine is molded from a polyimide resin composition containing a predetermined amount of titanium oxide whiskers, Satisfies the melt moldability, particularly the injection moldability, and the tip of the separating claw is well filled with titanium oxide whiskers. Therefore, there is an advantage that the tip portion of the separating claw has excellent wear resistance, impact resistance, and fatigue resistance.

The use of a filler having a thermal decomposition temperature higher than the melting point of a predetermined polyimide resin has the advantage of improving the heat resistance.

There is also an advantage that the above effects can be sufficiently maintained even when used in combination with a solid lubricant.

[Brief description of drawings]

FIG. 1A is a side view of a separation claw for a copying machine used in a wear resistance test, and FIG. 1B is a schematic side view illustrating a measurement state of a wear resistance test.

FIG. 2 is a schematic side view of an impact resistance tester.

FIG. 3 is a schematic side view of a fatigue resistance tester.

FIG. 4 is a side view of a separation claw for a copying machine showing a deformation amount t of a claw tip.

[Explanation of symbols]

1 Separated nail Two rollers 3 weights 4 heater 5 cams R Separation claw tip angle L'distance L lever length θ contact angle t Deformation amount W load h Impact height

Claims (6)

(57) [Claims] 1. A polyimide resin comprising a repeating unit represented by the following chemical formula 1 in an amount of 50% by weight or more , a titanium oxide whisker having an average fiber diameter of 0.05 to 3 μm and an average fiber length of 1 to 100 μm, and 10 to 40 % by weight, and Particle size 0.1-80
Separation claw for a copying machine, comprising a molded body of a resin composition containing 5 to 30% by weight of a solid lubricant of 0 μm . [Chemical 1] (In the formula, X is a direct bond or a divalent hydrocarbon group having 1 to 10 carbon atoms, selected from the group consisting of a hexafluorinated isopropylidene group, a carbonyl group, a thio group and a sulfonyl group. Represents a group, and R represents an aliphatic group having 2 or more carbon atoms, a cycloaliphatic group, a monocyclic aromatic group, a condensed polycyclic aromatic group, or an aromatic group, which is directly or crosslinked with each other. Represents a tetravalent group selected from the group consisting of non-fused polycyclic aromatic groups) To wherein said resin composition, according to claim 1 comprising a molded body before Kipo polyimide resin of the resin composition fillers are added 5 to 30 wt% having a thermal decomposition temperature higher than the melting point
Copying machines for separation claw. 3. The separating claw for a copying machine according to claim 2, wherein the filler is a thermosetting resin. 4. The separating claw for a copying machine according to claim 2, wherein the filler is a thermoplastic resin. 5. The separating claw for a copying machine according to claim 4, wherein the thermoplastic resin is a fluororesin. 6. The solid lubricant is graphite or molybdenum disulfide.
The composition according to claim 1, which is den, graphite fluoride, or lead monoxide.
Separation claw for copiers.