JPH11302487A - Sliding member resin composition and sliding member using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain sliding member resin compositions excellent in friction and abrasion properties irrespective of materials of the opponent axis, and sliding members using these compositions. SOLUTION: A sliding member resin composition 3 comprises 5-40 wt.% polycarbodimide resin and the balance of an ethylene tetrafluoride resin. A desired sliding member can be obtained by coating and filling the resin composition 3 on and in the surface or pores of a porous sintered metal layer 2 having been formed on a steel backing metal plate 1. Further, the sliding member can be obtained by filling and coating the resin composition 3 in and on the interstices and the surface of a metal reticulate structure.

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 member having excellent friction and wear characteristics and a sliding member using the same.

[0002]

2. Description of the Related Art Conventionally, ethylene tetrafluoride resin (hereinafter "PT
FE ”is self-lubricating, has a low coefficient of friction, and has chemical resistance and heat resistance. Therefore, it is widely used for sliding members such as bearings.

However, a sliding member made of PTFE alone is inferior in abrasion resistance and load resistance. Therefore, depending on the use of the sliding member, (a) a solid lubricant such as graphite, molybdenum disulfide or the like and / or glass A reinforcing material such as a fiber or a carbon fiber is contained in PTFE; (b) a porous metal sintered layer lined with a steel backing is filled and coated with PTFE; (c) a mesh of a metal mesh And PTF on the surface
E is filled and covered to compensate for the above disadvantages.

The sliding member having the above-mentioned embodiment (b) is a so-called multi-layer sliding member. For example, US Pat. No. 2,689,380 (1954);
Japanese Patent Publication No. 2452/245, Japanese Patent Publication No. 39-16950, Japanese Patent Publication No. 41-1868, and the like. These publications disclose a multi-layer sliding member in which pores and surfaces of a porous metal sintered layer lined with a steel backing are filled and coated with PTFE containing a filler made of PTFE or lead or lead oxide. I have.

[0005] A sliding member having the mode (c) is disclosed, for example, in Japanese Patent Publication No. 55-23740. This publication discloses a self-lubricating lining foil made of a material including a metal fabric, a fluoroplastic, and a reinforcing material of an inorganic fiber.

[0006]

The above-mentioned various sliding members are used in many different operating conditions, such as dry friction conditions or oil-in-oil or oil lubricating conditions. For example, aluminum or aluminum alloy is used as the mating shaft for the purpose of reducing the weight of information equipment, etc. A member is hard to say.

[0007] PTFE compositions for sliding members are used as fillers for many engineering plastics, such as graphite, molybdenum disulfide or other metal sulfides, metal oxides, glass fiber or carbon. Attempts have been made to use inorganic fibers such as fibers, but these fillers may contribute to the improvement of the wear resistance of the resin layer, but often impede the low friction property inherent to PTFE. Raise the problem.

[0008] The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a resin composition for a sliding member excellent in friction and wear characteristics without being influenced by the material of a mating shaft, and a sliding member using the same.

[0009]

Means for Solving the Problems As a result of diligent studies to achieve the above object, the present inventor has found that a resin composition covering the pores and the surface of a porous metal sintered layer formed on a steel back metal is provided. Or a sliding member formed by filling and coating a resin composition over a mesh and a surface of a metal network, wherein the resin composition is a mixture of PTFE and a specific amount of a polycarbodiimide resin. It has been found that the sliding member used can exhibit excellent friction and wear characteristics under dry friction conditions and without being affected by the material of the mating shaft. The present invention has been completed based on such knowledge, and the gist of each invention is as follows.

A first gist of the present invention resides in a resin composition for a sliding member comprising 5 to 40% by weight of a polycarbodiimide resin and a balance of ethylene tetrafluoride resin.

A second gist of the present invention is to provide a resin composition layer formed by filling and covering the pores and the surface of a porous metal sintered layer formed on a steel backing metal, or a mesh of a metal network. And a resin composition layer formed by filling and covering the surface, wherein the resin composition layer is a polycarbodiimide resin 5
-40% by weight, with the balance being a sliding member composed of ethylene tetrafluoride resin.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
First, the resin composition for a sliding member of the present invention will be described. In the present invention, PTF which is a main component of the resin composition
Examples of E mainly include fine powders such as "Teflon 6CJ (trade name)" manufactured by Du Pont-Mitsui Fluorochemicals, "Polyflon F201 (trade name)" manufactured by Daikin Industries, and "Fluon CD-076 (trade name) manufactured by Asahi Glass Co., Ltd. Product name) and “Fluon CD-4 (product name)” are used.

Further, a molding powder, such as “Teflon 7AJ (trade name)” manufactured by Du Pont-Mitsui Fluorochemicals, may be used in the above-mentioned fine powder in an amount of 20% by weight or less based on the resin composition.
The compounding amount of PTFE in the resin composition is the remaining amount obtained by subtracting the compounding amount of the filler from the resin composition amount.

As the polycarbodiimide resin, a powdery polycarbodiimide resin obtained by a decarboxylation reaction of isocyanate is preferable. For example, "Carbodilite (trade name)" manufactured by Nisshinbo Industries, Inc. is used. This carbodilite has a carbodiimide group in its main chain, melts when heated, causes an internal crosslinking reaction, and becomes a heat-resistant resin. This polycarbodiimide resin is blended with PTFE as the main component to improve abrasion resistance and heat resistance. And its compounding amount is 5 to 40% by weight, preferably 10 to 30% by weight.

The above-mentioned polycarbodiimide resins 5 to 40
The resin composition can be a resin composition in which a predetermined amount of a solid lubricant and / or barium sulfate is further blended with the resin composition consisting of PTFE by weight and the balance being PTFE.

As the solid lubricant, graphite, molybdenum disulfide, tungsten disulfide, and boron nitride are used.
These solid lubricants improve the abrasion resistance of the resin composition having the above component composition. And the compounding amount is 5% by weight.
Hereinafter, it is preferably 1 to 3% by weight.

The barium sulfate may be either sedimentable or elutriable barium sulfate. Such barium sulfate is
For example, it is commercially available from Sakai Chemical Industry Co. and can be easily obtained. Barium sulfate improves the abrasion resistance of the resin composition as in the case of the above-mentioned solid lubricant, and its compounding amount is 5 to 15% by weight, preferably 5 to 10% by weight. Since barium sulfate does not exhibit lubricity like the above-mentioned solid lubricant, if it is added in an amount exceeding 15% by weight, P
As a result, the low friction property inherent to TFE is impaired.

Next, the sliding member of the present invention and a method of manufacturing the same will be described. First, a description will be given of a sliding member (I) using a backing made of a steel thin plate and a porous metal sintered layer backed by the backing, and a method of manufacturing the sliding member.

As the back metal forming the base material, a rolled steel sheet for general structure is used. The steel sheet is preferably a continuous strip provided as a hoop material by being wound in a coil shape, but is not necessarily limited to the continuous strip, and may be a strip cut to an appropriate length. These strips may be copper-plated or tin-plated as required to improve corrosion resistance.

The metal powder forming the porous metal sintered layer is:
The metal itself, bronze excellent in friction and wear characteristics, such as lead bronze or phosphor bronze, copper alloy powder passing through approximately 100 mesh is used, depending on the purpose other than copper alloy, for example, aluminum alloy, iron Such powders can also be used. The particle form of the metal powder may be a lump, spherical or irregular shape. The porous metal sintered layer must be firmly bonded to the alloy powder and the strip such as the steel plate, and have a certain thickness and a required porosity. The thickness of the porous metal sintered layer is generally about 0.15 to 0.40 mm, preferably 0.2 to 0.3 mm, and the porosity is generally about 10% by volume or more, preferably about 15 to 40%. It is recommended to be volume%.

The resin composition is obtained by mixing PTFE and each of the above-mentioned fillers, then adding a petroleum-based solvent to the obtained mixture, and stirring and mixing to obtain a resin composition having wettability. . The mixture of PTFE and filler is PTF
The transition temperature of E at room temperature (19 ° C.) or lower, preferably 10 to 18
C. and agitated mixing of the resulting mixture with a petroleum-based solvent is also performed at the same temperature as described above. By adopting such a temperature condition, fibrous formation of PTFE is prevented, and a uniform mixture can be obtained.

As the petroleum solvent, naphtha, toluene,
In addition to xylene, a mixed solvent with an aliphatic solvent or a naphthenic solvent is used. The ratio of petroleum solvents used is P
15 per 100 parts by weight of the mixture with TFE powder filler
To 30 parts by weight. When the use ratio of the petroleum solvent is less than 15 parts by weight, the spreadability of the wettable resin composition is poor in the step of filling and coating the porous metal sintered layer described below, and as a result, Unevenness is likely to occur in the filling coating on the layer. On the other hand, when the use ratio of the petroleum solvent exceeds 30 parts by weight, not only the filling and coating work becomes difficult, but also the uniformity of the coating thickness of the resin composition is impaired, or the resin composition and the sintered layer The adhesion strength with the adhesive becomes poor.

The sliding member (I) of the present invention comprises the following (a)
To (d). (A) spraying and supplying a wettable resin composition to a porous metal sintered layer formed on a back metal made of a steel thin plate;
Rolling is performed by a roller to fill the sintered layer with the resin composition, and a coating layer made of the resin composition having a uniform thickness is formed on the surface of the sintered layer. In this step, the thickness of the coating layer is:
The resin composition is required to have a coating thickness of 2 to the final product.
2.2 times as thick. Most of the filling of the resin composition into the pores of the porous metal sintered layer proceeds in this step.

(B) The petroleum-based solvent is removed by holding the back metal treated in the above step (a) in a drying furnace heated to a temperature of 200 to 250 ° C. for several minutes, and then the dried resin The composition is subjected to a pressure roller treatment under a pressure of 300 to 600 kgf / cm ² by a roller so as to have a predetermined thickness.

(C) The back metal treated in the above step (b) is introduced into a heating furnace, heated at a temperature of 360 to 380 ° C. for several minutes to several tens of minutes, baked, taken out of the furnace, and again. Adjust the dimensional variation by roller processing.

(D) The back metal whose dimensions have been adjusted in the step (c) is cooled (air cooling or natural cooling), and then, if necessary, a straightening roller treatment is performed to correct the undulation of the back metal. A sliding member.

In the sliding member obtained through the above steps (a) to (d), the porous metal sintered layer has a thickness of 0.10
0.40 mm, and the thickness of the coating layer formed from the resin composition is 0.02 to 0.15 mm. The sliding member thus obtained is cut into an appropriate size and used as a sliding plate in a flat state, and is also rounded and used as a cylindrical wound bush.

Next, the sliding member (II) of the present invention using a substrate made of a metal mesh and a method for producing the sliding member will be described. As the metal mesh forming the base material, (i) a fixed lower mold having a straight blade and a movable upper mold having a corrugated, trapezoidal, triangular or other blade fixed with a thin metal plate. Into the metal sheet at right angles to the blade of the fixed type or in the oblique direction to the blade of the fixed lower die. (Ii) a woven wire mesh formed by weaving a fine metal wire as a warp and a weft, (iii) a braided wire mesh formed by knitting a fine metal wire, and the like.

The expanded metal has a thickness of 0.3
It is preferable that a metal sheet having a length of 0.1 mm to 1.5 mm and a pressure of 0.1 mm to 1.0 mm be formed by subjecting a metal sheet having a thickness of 0.1 mm to 1.5 mm to an expanding process. As woven or braided wire mesh,
A wire formed by weaving or knitting a fine metal wire having a wire diameter of 0.1 to 0.5 mm into a mesh of 10 to 200 mesh is preferable.

As the metal material forming the expanded metal, woven or braided wire mesh, a thin plate or a thin wire of stainless steel, copper, phosphor bronze, bronze, iron or the like is preferable.

The sliding member (II) of the present invention is manufactured through the following steps (a) to (c). The resin composition is described in the above-mentioned method for manufacturing the sliding member (I). Resin compositions similar to those used are used.

(A) A resin composition is scattered and supplied onto a metal mesh made of expanded metal, woven or braided wire mesh, and is rolled with a roller to fill the mesh of the metal mesh with the resin composition and to form a metal mesh. A coating layer made of a resin composition having a uniform thickness is formed on the surface of the body. In this step, the thickness of the coating layer is set to be 2 to 2.5 times the coating thickness required for the final composition of the resin composition.

(B) The petroleum-based solvent is removed by holding the metal net treated in the above step (a) in a drying furnace heated to a temperature of 200 to 250 ° C. for several minutes, and then dried. The obtained resin composition is subjected to a pressure roller treatment under a pressure of 300 to 600 kg / cm ² so as to have a predetermined thickness by a roller.

(C) After the metal net treated in the above step (b) is introduced into a heating furnace and heated at a temperature of 360 to 380 ° C. for several minutes to several tens minutes, the resin composition is fired. Then, it is taken out of the furnace, and the dispersion of the dimensions is adjusted again by a roller treatment to obtain a desired sliding member.

In the sliding member obtained through the above steps (a) to (c), the thickness of the coating layer made of the resin composition formed on the surface of the metal mesh is usually 0.05 to 0.05. 1.
0 mm. The sliding member thus obtained is
It is cut into appropriate dimensions and used as a sliding plate in a flat state, and is also bent and used as a cylindrical wound bush.

[0036]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist. In the following examples, the sliding characteristics of the sliding member (I) were determined by the following test methods (1) and (2), and the sliding characteristics of the sliding member (II) were determined by the following ( It was evaluated by the test method 3).

Thrust test (1): The friction coefficient and the wear amount were measured under the conditions shown in Table 1. And about a coefficient of friction, the value 8 hours after starting a test is shown,
The amount of wear was indicated by the dimensional change of the sliding surface after 8 hours of the test time.

[0038]

[Table 1] Sliding speed 10m / min Load 50kgf / cm ² Test time 8 hours Lubrication No lubrication Counterpart material Carbon steel for machine structure (S45C)

Thrust test (2): The friction coefficient and the wear amount were measured under the conditions shown in Table 2. And about a coefficient of friction, the value 8 hours after starting a test is shown,
The amount of wear was indicated by the dimensional change of the sliding surface after 8 hours of the test time.

[0040]

[Table 2] Sliding speed 10 m / min Load 50 kgf / cm ² Test time 8 hours Lubrication No lubrication Counterpart material Aluminium

Thrust test (3): The friction coefficient and the amount of wear were measured under the conditions shown in Table 3. And about a coefficient of friction, the value 8 hours after starting a test is shown,
The amount of wear was indicated by the dimensional change of the sliding surface after 8 hours of the test time.

[0042]

[Table 3] Sliding speed 3m / min Load 200kgf / cm ² Test time 8 hours Lubrication No lubrication Counterpart material Carbon steel for machine structure (S45C)

Examples 1 to 10 and Comparative Examples 1 to 4 In the following examples, PTFE “Teflon 6C
J "(manufactured by Du Pont-Mitsui Fluorochemicals Co., Ltd.) and a mixed solvent of an aliphatic solvent and a naphthenic solvent (trade name" EXSOL "manufactured by Exxon Chemical Co., Ltd.) was used as a petroleum solvent.

First, PTFE and the fillers shown in Tables 5 to 8 were supplied into a Henschel mixer and mixed by stirring.
20 parts by weight of a petroleum-based solvent was blended with 100 parts by weight of the obtained mixture, and the mixture was mixed with PTFE at a temperature below the room temperature transition point (15
C) to obtain a resin composition.

The obtained resin composition is dispersed and supplied on a porous metal (bronze) sintered layer (thickness 0.25 mm) formed on a steel backing (thickness 0.70 mm) made of a thin metal plate,
Rolling was performed using a roller so that the thickness of the resin composition became 0.25 mm, thereby obtaining a multilayer plate in which the pores and the surface of the sintered layer were filled and covered with the resin composition. The obtained multilayer plate was kept in a hot-air drying oven heated to a temperature of 200 ° C. for 5 minutes to remove the solvent, and then the dried resin composition layer was pressed with a roller by a pressing force of 4 mm.
Rolling was performed at 00 kgf / cm ^{2 to set} the thickness of the resin composition layer coated on the sintered layer to 0.10 mm.

Next, the multi-layer plate subjected to the pressure treatment was heated in a heating furnace for 3 hours.
After heating and baking at 70 ° C. for 10 minutes, pressure treatment was again performed with a roller, and dimensional adjustment and swelling correction were performed to produce a multilayer sliding member. The corrected multi-layer sliding member was cut to obtain a multi-layer sliding member test piece having a side of 30 mm. FIG.
Is a cross-sectional view showing the multilayer sliding member obtained in this manner, wherein reference numeral 1 denotes a steel backing metal, 2 denotes a porous metal sintered layer lined on the steel backing metal, and 3 denotes a porous metal sintering layer. It is a coating layer composed of a resin composition in which pores and surfaces of the metal sintered layer 2 are filled and coated.

Tables 5 to 7 show the results of the thrust tests (1) and (2) of each multilayer sliding member. In addition, the compounding ratio in the table was shown by weight%, and the kind used about the solid lubricant was shown by (circle). (Below)

[0048]

[Table 5] Example {1 2 3 4 5} ─────────────────────── PTFE 90 85 80 75 70 Polycarbodiimide resin 10 15 20 25 30 (carbodilite) Solid lubricant-----Graphite Molybdenum sulfide Barium sulfate------Thrust test (1) Coefficient of friction (× 10 ^-2 ) 14 13 12 12 13 Abrasion (μm) 27 10 8 8 5 Thrust test (2) Coefficient of friction (× 10 ^-2 ) 12 12 11 12 12 Abrasion amount (μm) 20 15 10 9 6 ─────────────────────────────────── ─ (margin)

[0049]

[Table 6] Example of implementation {6 7 8 9 10} ─────────────────────── PTFE 78 78 75 73 75 Polycarbodiimide resin 20 20 15 15 15 (carbodilite) Solid lubricant 22-2-2 Graphite ○ ○ Molybdenum disulfide ○ ○ Barium sulfate --- 10 10 10 Thrust test (1) Friction coefficient (× 10 ^-2 ) 12 13 14 13 13 Wear (μm) 696957 Thrust test (2) Friction coefficient (× 10 ^-2 ) 11 13 14 14 13 Abrasion (μm) 9 9 9 7 8 ─────────────────────────────── ───── (margin)

[0050]

[Table 7] Comparative example {1 2 3 4} ────────────── PTFE 80 80 80 50 Aromatic polyester 20---Solid lubricant-20--(Graphite) Glass fiber--20-Lead---50 Thrust test ( 1) Friction coefficient (× 10 ^-2 ) 20 17 30 14 Abrasion amount (μm) 21 132 13 ^* 42 Thrust test (2) Friction coefficient (× 10 ^-2 ) 18 30 30 15 Abrasion amount (μm) 32 304 ^** 367 ^** 54 中 In the above table, * indicates that the coefficient of friction increased sharply. Shows the amount of wear at the time when the test was stopped halfway. Also,**
Indicates that the surface resin layer is worn away and the underlying metal sintered layer is exposed.

From the test results described above, it can be seen that the multi-layer sliding member of the embodiment of the present invention has a low coefficient of friction and a very small amount of wear even in comparison with the comparative example without being influenced by the mating shaft member. Was something.

Examples 11 to 20 and Comparative Examples 5 to 8 In the following examples, PTFE “Teflon 6C
J "(manufactured by Du Pont-Mitsui Fluorochemicals Co., Ltd.) and a mixed solvent of an aliphatic solvent and a naphthenic solvent (trade name" EXSOL "manufactured by Exxon Chemical Co., Ltd.) was used as a petroleum solvent.

First, PTFE and the fillers shown in Table 8 were fed into a Henschel mixer and mixed by stirring. 20 parts by weight of a petroleum-based solvent was mixed with 100 parts by weight of the obtained mixture, and the mixture was mixed with PTFE at room temperature. The mixture was mixed at a temperature (15 ° C.) below the transition point to obtain a resin composition.

A 0.30 mm-thick phosphor bronze alloy plate was subjected to an expanding process so that each piece (strand) was 0.60 m
0.43mm thick with regular mesh of square shape of m
Was prepared, and this was used as a substrate A.
Further, a woven wire mesh having a mesh of 50 mesh was prepared using a phosphor bronze alloy fine wire having a wire diameter of 0.3 mm for the weft and the warp, and this was used as a base material B.

The above resin composition is supplied onto a base material A made of expanded metal and a base material B made of a woven wire mesh, and is rolled with a roller to fill the mesh of the base material with the resin composition. After forming a coating layer of the resin composition on the surface of the above, it was kept in a hot air drying furnace heated to a temperature of 220 ° C. for 5 minutes to remove the solvent in the resin composition.
Next, the base material whose mesh and surface are filled and coated with the resin composition is heated and baked in a heating furnace at 360 ° C. for 10 minutes, and then subjected to a pressure treatment with a roller to perform dimensional adjustment and correction of undulation, etc. A substrate on which a coating layer having a thickness of .13 mm was formed. Cut the base material after straightening, 3 sides
A 0 mm sliding plate test piece was obtained.

FIG. 2 is a plan view showing an expanded metal,
FIG. 3 is a cross-sectional view showing a sliding member based on the expanded metal shown in FIG. 2, in which reference numeral 4 denotes expanded metal, 5 denotes sides (strands), 6 denotes mesh, and 7 denotes expanded metal mesh. And a coating layer composed of a resin composition whose surface is filled and coated. FIG. 4 is a cross-sectional view showing a sliding member using a woven wire mesh as a base material. In the figure, reference numeral 8 denotes a woven wire mesh, and 9 denotes a resin composition filled and coated on the mesh and the surface of the wire mesh. It is a coating layer made of an object.

Tables 8 to 10 show the results of the thrust test (3) of each sliding member. In addition, the compounding ratio in the table was shown by weight%, and the kind used about the solid lubricant was shown by (circle). (Below)

[0058]

[Table 8] Example {11 12 13 14 15} ─────────────────────── PTFE 90 85 80 75 70 Polycarbodiimide resin 10 15 20 25 30 (carbodilite) Solid lubricant-----Graphite Molybdenum sulfide barium sulfate------Base material AB AAB Thrust test (3) Coefficient of friction (× 10 ^-3 ) 80 72 70 68 70 Abrasion amount (μm) 27 12 88 85 ────── ────────────────────────────── (margin)

[0059]

[Table 9] Example {16 17 18 19 20} ─────────────────────── PTFE 78 78 75 73 75 Polycarbodiimide resin 20 20 15 15 15 (carbodilite) Solid lubricant 22-2-2 Graphite ○ ○ Molybdenum disulfide ○ ○ Barium sulfate -10 10 10 Base material AA AAB Thrust test (3) Coefficient of friction (× 10 ^-3 ) 75 72 70 72 72 Amount of wear (μm) 6 8 7 5 7 7 ────────────────────────────────── (margin)

[0060]

[Table 10] Comparative example {5.678} ────────────── PTFE 80 80 80 50 Aromatic polyester 20---Solid lubricant-20--(Graphite) Glass fiber--20-Lead---50 Base material A B A A Thrust test (3) Coefficient of friction (× 10 ^-3 ) 95 120 190 85 Abrasion (μm) 43 68 35 53 ───────────────────── ────────────

From the above test results, the sliding member of the example of the present invention showed a stable friction coefficient throughout the test time even in comparison with the comparative example, and had a very small amount of wear.

[0062]

According to the present invention described above, there is provided a sliding member exhibiting excellent sliding characteristics irrespective of the material of the mating shaft member.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a sliding member of the present invention.

FIG. 2 is a plan view showing an expanded metal as a base material.

FIG. 3 is a sectional view showing an example of the sliding member of the present invention using an expanded metal as a base material.

FIG. 4 is a sectional view showing an example of the sliding member of the present invention using a woven wire mesh as a base material.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 steel back metal 2 porous metal sintered layer 3 resin coating layer 4 expanded metal 5 side 6 mesh 7 resin coating layer 8 woven wire mesh 9 resin coating layer

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08K 3/38 C08K 3/38 // F16C 33/20 F16C 33/20 A 33/24 33/24 Z (C08L 27/18 79:00)

Claims (6)

[Claims] 1. A resin composition for a sliding member comprising 5 to 40% by weight of a polycarbodiimide resin and the balance being ethylene tetrafluoride resin. 2. The resin composition for a sliding member according to claim 1, comprising a solid lubricant selected from graphite, molybdenum disulfide, tungsten disulfide, and boron nitride at a ratio of 5% by weight or less. 3. The resin composition for a sliding member according to claim 1, wherein barium sulfate is contained at a ratio of 3 to 15% by weight. 4. A resin composition layer formed by filling and covering the pores and the surface of a porous metal sintered layer formed on a steel backing metal, or by filling and covering a mesh and a surface of a metal network. A sliding member comprising: a resin composition layer comprising: 5 to 40% by weight of a polycarbodiimide resin; and a balance of ethylene tetrafluoride resin. 5. The sliding member according to claim 4, wherein the resin composition contains a solid lubricant selected from graphite, molybdenum disulfide, tungsten disulfide, and boron nitride at a ratio of 5% by weight or less. 6. The resin composition according to claim 1, wherein said barium sulfate is 3 to 15 barium sulfate.
The sliding member according to claim 4, wherein the sliding member is contained in a ratio of weight%.