JPS61261396A - Sliding material having excellent frictional properties - Google Patents

Abstract

PURPOSE:To obtain a sliding material remarkably improved in friction properties, by mixing FEP, PFA, ETFE, PVDF, PCTFE or EPE and a composite metal oxide with the balance being PTFE at a specific ratio. CONSTITUTION:A sliding material comprising 0.1-35vol% at least one member (a) selected from among FEP, PFA, ETFE, PVDF, PCTFE and EPEE, 0.1-35vol% composite metal oxide (b) with the balance (c) being PTFE, provided that the total content of each component except for PTFE is 0.2-70vol%. When the content of the component (A) is less than 0.1vol% abrasion and loading resistance are extremely low. On the other hand, the total content of the components exceeding 50vol% results in an improvement in abrasion resistance but lowering in sliding properties due to increased frictional coefficient and friction temp. When the content of the component (b) is less than 0.1vol%, no effect of addition can be attained while, when the content exceeds 35vol%, embrittlement is caused.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sliding material with excellent frictional properties.

[Conventional technology]

Conventional sliding materials are disclosed, for example, in the following publications. That is, they are disclosed in Japanese Patent Publication No. 39-16950, Japanese Patent Application Publication No. 54-86041, Japanese Patent Application Publication No. 58-28016, and Japanese Patent Application Publication No. 54-45440@.

[Problem that the invention seeks to solve]

However, the sliding material manufactured by the technique disclosed in the above-mentioned publication did not necessarily have satisfactory frictional properties, which are extremely important for sliding properties.

[Purpose of the invention]

An object of the present invention is to provide a single-piece sliding material that has better frictional properties than this conventional sliding material.

[Means for solving problems]

The single sliding material of the present invention includes FEPS PFA, ETFE,
A total of 0.1 to 50% by volume of at least one selected from Group A consisting of PVDF, PCTFE, and EPE; 0.1 to 35% by volume of composite metal oxide; and the remainder substantially consisting of PTFE; The total content of each component other than the above is 0.2 to 70% by volume, and the friction properties are excellent.

Other single sliding materials of the present invention include FEP, PFA, ETF
A total of 0.1 to 50% by volume of at least one member selected from Group A consisting of E, PVDF, PCTFE, and EPE; composite metal oxide; metal oxide; the sum of the metal oxide and the above composite metal oxide The amount is 0.1 to 35% by volume, and the balance is substantially PTF.
E and the total of each component other than PTFE is 0.2~
70% by volume, and has excellent friction properties.

Further single sliding materials of the present invention include FEP, PFA, E
A consisting of TFElPVDFSPCTFE and EPE
A total of 0.1 to 50 at least one species selected from the group
Capacity%; Composite gold r! A oxide; Metal lubricant such as Pb, Sn and/or its alloy;
Metal sulfide; metal fluoride; graphite fluoride, graphite,
At least one member selected from the eight groups consisting of carbon-based solid lubricants such as coke and carbon; fibrous materials such as carbon fiber; and ceramics such as SiC, and at least one member selected from the eight groups and the above-mentioned composite metal. The total amount of oxides is 0.1 to 35% by volume, and the remainder is essentially PTFE, and the total amount of each component other than PTFE is 0.2 to 70% by volume, and it has excellent friction properties. There is.

Further single sliding materials of the present invention include FEP, PFA, E
A total of 0.1 to 5 of at least one selected from Group A consisting of TFE, PVDFSPCTFEJ5, and EPE.
0% by volume; composite metal oxide; metal oxide: metal lubricant such as Pb, Sn and/or alloy thereof;
Metal sulfide; metal fluoride: graphite fluoride, graphite,
Carbon-based solid lubricant such as coke and carbon; Fiber materials such as carbon fiber; At least one selected from the eight groups consisting of ceramics such as SiC; At least one selected from Group B, the above composite aM compound, and the above The total amount of gold m oxide is 0.1 to 35% by volume, and the remainder is substantially composed of PTFE, and the total amount of each component other than PTFE is 0.2 to 70% by volume, which has a significant effect on friction properties. It is excellent.

[Effect]

Next, the reason for limiting the sliding material of the present invention as described in the claims (determination of upper and lower limits) and its effects will be explained: (1) FEP, PFA,
ETFE, PVDF.

Total of at least one selected from Group A consisting of PCTFE and EPE; 0.1 to 50% by volume If it is less than 0.1% by volume, wear resistance and load resistance will be significantly reduced. On the other hand, if the total value exceeds 50% by volume, the wear resistance will improve, but the friction coefficient and friction temperature will increase and the sliding properties will deteriorate, so 50% by volume is set as the upper limit.

(2) Composite metal oxide 0.1-35111
% total of composite metal oxide and gold RWL compound; 0.1~
35 volume% total amount of composite metal oxide and 8 groups; 0.1 to 35 volume% total amount of composite metal oxide and metal oxide and 8 groups 0.1
~35% by volume If it is less than 0.1% by volume, the addition has no effect on wear resistance or load resistance, and there is no point in adding it. Also 35
If it is added in excess of the volume percentage, it becomes brittle and becomes unsuitable for practical use.

+3) Total of each component other than PTFE: 0.2 to 70% by volume If the total of each component is less than 0.2% by volume, the addition has no effect, and if this total exceeds 70% by volume, it will become brittle. Since it is not suitable for practical use and the synergistic effect of each component is lost, the coefficient of friction and friction temperature increase, and the sliding properties are deteriorated, the total amount of each component is limited to 0.2 to 70% by volume.

The gold RTAW II agent described with respect to the above composition is
Pb1Sn, Cu, Zn, 5b1B i, Cd.

In, l-i and/or alloys thereof, metal oxides are metal oxides described in relation to the above compositions, Zn, A
I, Sb, Y, In, Zr, Mo, Cd.

Ca, Ag, Cr, Co, Ti, Si, Mn.

Sn, Ce, W, B i, Ta, Fe1Cu, Pb.

N11Te1Nb, Pt, V, Pd, MC), 1-i
The composite metal oxides are Coo-A 1203, T 1o2-Zn02, Pb
0-T i O2, Coo-5no2, MqO-A l
203, Zr02-8 + 02, Coo-A I2
03-MqO.

Co0-A12o3-Cr203, Coo-ZnO-MaOl Pb304-8b203-T i 02, Cr2O3-
8b203-Ti02, Cr203-CuO-MnO2, C0O-Cr203-Fe203, Coo-Zn02-Ni02-T: 02, Co
o-Cr203-MnO2-Fe203, etc. Metal lubricants include Pb, Sn, sb, Bi, and Cd.

In, l-i, and/or their alloys, and metal fluorides include PbF, 81F3, CdF2・BaF2
Fiber materials include carbon fiber, glass fiber, cotton (cellulose), asbestos, rock wool, potassium titanate fiber, aromatic polyamide AI, etc.
This refers to natural and artificial fibers such as miscellaneous materials, and ceramics refers to S
+ C, T 1c.

TiN, B C, BN, Si3 N4, AIN, H
fN, TaN1WC, Tag, VC, ZrC.

etc.

〔Example〕

Examples will be described below.

(2) Weighing process A step of weighing powder having the composition ratio shown in Table 1.

(c) Mixing step A step of mixing for 2 to 10 minutes using a mixing 1fi (for example, a Henschel mixer).

(f) Powder compaction process with a compression force of 9/α2 at 1.000 and a diameter of 50 #l
Step of creating a powder compact of a round bar (cylindrical body) with a length of 50 m or a hollow round bar (cylindrical body) with an outer diameter of 35 m and an inner diameter of 1511 I + 1 and a length of 40 m.

2) Firing step The temperature is gradually raised from room temperature in an inert gas (for example, N2 gas) or atmospheric air (air) atmosphere, and after being fired and held at 327°C to 400°C for several hours, it is cooled in a furnace. Composite layer sliding materials Nos. 1 to 5 (comparative materials) and single sliding materials Nα6 to No. 10 (products of the present invention) could be obtained through the steps (a) to (f) above. The bearing performance (sliding characteristics) of this product is shown in Table 1, and the test conditions are shown in Table 2.

〔effect〕

Next, the effects of the above embodiment will be explained.

As seen from Table 1, comparative materials (Samples 11k11-5)
When compared with the products of the present invention (samples Nα6 to 10), which are single sliding materials, Ll, It! The product of the present invention has better rubbing properties.
It has also been found that the sliding material made of the single composition of the present invention is superior in terms of conformability, foreign matter embedding properties, and properties that do not cause damage to the mating material, which are essential for bearing properties. did. As a result, the present invention was able to achieve its intended purpose.

The sliding material made of the single composition produced by the method of the present invention can be used for 0AIi equipment, textile-related equipment, home appliances,
It can be used in various applications such as audio equipment, piston rings for automobile shock absorbers, oil seals, and general industrial equipment. As explained above, the present invention is practically and economically useful for industrial power.

Table 2

Claims (4)

[Claims] (1) FEP, PFA, ETFE, PVDF, PCTF
A total of 0.1 to 50% by volume of at least one selected from Group A consisting of E and EPE; 0.1 to 50% by volume of composite metal oxide;
1 to 35% by volume; and the remainder substantially consists of PTFE, with the total of each component other than PTFE being 0.2 to 70% by volume
A sliding material with excellent friction properties. (2) FEP, PFA, ETFE, PVDF, PCTF
A total amount of at least one selected from Group A consisting of E and EPE from 0.1 to 50% by volume; composite metal oxide; metal oxide; the total amount of the metal oxide and the composite metal oxide is 0.1 to 50% by volume; 1 to 35% by volume, the remainder being substantially PTFE, and the total amount of each component other than PTFE being 0.2 to 70% by volume. A sliding material with excellent frictional properties. (3) FEP, PFA, ETFE, PVDF, PCTF
A total of 0.1 to 50% by volume of at least one selected from Group A consisting of E and EPE; a composite metal oxide; a metal lubricant such as Pb, Sn and/or an alloy thereof;
Metal sulfide; metal fluoride; graphite fluoride, graphite,
Carbon-based solid lubricants such as coke and carbon; Fiber materials such as carbon fiber; At least one selected from Group B consisting of ceramics such as SiC; At least one selected from Group B and the above composite metal oxide. A sliding material with excellent frictional properties in which the total amount is 0.1 to 35% by volume, the remainder is substantially PTFE, and the total amount of each component other than PTFE is 0.2 to 70% by volume. (4) FEP, PFA, ETFE, PVDF, PCTF
A total of 0.1 to 50% by volume of at least one selected from Group A consisting of E and EPE; composite metal oxide; metal oxide; metal lubricant such as Pb, Sn and/or alloy thereof;
Metal sulfide; metal fluoride; graphite fluoride, graphite,
Carbon-based solid lubricants such as coke and carbon; Fiber materials such as carbon fiber; and at least one selected from Group B consisting of ceramics such as SiC; At least one selected from Group B and the above composite metal oxide; The total amount of the above metal oxides is 0.1 to 35% by volume, and the balance is substantially PTFE, and the total amount of each component other than PTFE is 0.2 to 70% by volume.It has excellent friction properties. sliding material.