GB2107337A - Semi-metallic friction material - Google Patents
Semi-metallic friction material Download PDFInfo
- Publication number
- GB2107337A GB2107337A GB08224269A GB8224269A GB2107337A GB 2107337 A GB2107337 A GB 2107337A GB 08224269 A GB08224269 A GB 08224269A GB 8224269 A GB8224269 A GB 8224269A GB 2107337 A GB2107337 A GB 2107337A
- Authority
- GB
- United Kingdom
- Prior art keywords
- friction material
- semi
- zinc
- metallic
- metallic friction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000002783 friction material Substances 0.000 title claims abstract description 32
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 7
- 150000003752 zinc compounds Chemical class 0.000 claims abstract description 7
- 229910000640 Fe alloy Inorganic materials 0.000 claims abstract description 4
- 239000004640 Melamine resin Substances 0.000 claims abstract description 4
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 4
- 239000005011 phenolic resin Substances 0.000 claims abstract description 4
- 239000003822 epoxy resin Substances 0.000 claims abstract description 3
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 3
- 229920001568 phenolic resin Polymers 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 210000002268 wool Anatomy 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims 1
- 239000011230 binding agent Substances 0.000 abstract description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 13
- 239000011701 zinc Substances 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 244000226021 Anacardium occidentale Species 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
A friction material is characterised in that, in a semi- metallic friction material composition substantially consisting of iron metal and/or iron alloy and thermosetting resin binder, zinc dust and/or a zinc compound is blended in a range of 0.5-15 weight percent in the composition. The binder may be a phenolic, epoxy or melamine resin. Uses:- Linings or friction pads for drum or disc brakes, respectively.
Description
SPECIFICATION
Semi-metallic friction material
The present invention relates to a semi-metallic friction material and, in particular to a material which is useful in the automobile industry as a lining material for drum brakes and as friction pads for disc brakes.
An organic friction material containing asbestos fibres as a reinforcing material has been conventionally used in the industry as an automobile friction material. In recent years, for the purpose of maintaining the wear characteristics at high temperature of more than 4000 C, semi-metallic friction material containing steel wool, iron powder, and graphite, for example, as a main component and a thermosetting resin such as a phenol, epoxy or melamine resin as a binder has come into generai use.
However, this semi-metallic friction material easily gathers rust since the friction material contains a large amount of iron. In particular, since rock salt and calcium chloride for example are used for thawing snow in snowfall districts, the chloride ion of these materials acts on the component of semimetallic friction materials and speeds the gathering of rust. Furthermore, there have been problems that, when rust is formed within a friction material, the wear increases while the strength lowers remarkably and the friction material tends to come off the backing plate when there is too must rust.
We have sought to obviate these problems associated with conventional semi-metallic friction material.
Thus, the present invention provides a semi-metallic material composition comprising iron metal and/or iron alloy, a thermosetting resin and zinc dust, and/or a zinc compound in a proportion of 0.5--15 wt %.
The melting point of zinc is as low as 4200C, and since friction materials used in the automobile industry must withstand high temperatures the effectiveness of the friction material may fade and thus the application amount of this zinc dust or zinc compound should be determined according to the temperature to be used. In other words, for use at a high temperature of more than 4000C, the amount of zinc dust or zinc compound used should preferably be as little as possible, and, in the case of a temperature of less than 4000 C, a greater amount of zinc may be used.
We have found that the friction material blended with zinc dust or zinc compound according to the invention improves not only the antitrust properties of the friction material itself but also the antirust characteristics of the iron material in frictional contact therewith and further it results in an advantage of avoiding problems during transportation by preventing the rust formation during exportation and the fastening with rust of the friction material in the export vehicles, for example.
The invention is illustrated in the following description with reference to the accompanying drawing.
Compositions of semi-metallic friction materials substantially consisting of steel wool, iron powder and graphite, for example, as the main component and a thermosetting resin comprising a phenol, epoxide or a melamine resin, for example, as a binder were added with zinc dust in a range of 1-1 5 weight percents and mixed with stirring. The resulting composition was then formed under heating and pressure by a normal heat press, and further heated sufficiently in order to complete any reaction of the thermosetting resin as the binder. Thereafter, the semi-metallic friction materials thus obtained were tested in respect of rust and fade characteristics.The results obtained are indicated in accompanying
Figure which is a graph indicating the relation between the amount of zinc blended into the semimetallic friction material according to the invention and the amount of rust and the fade (y).
The test method to determine the rust characteristics was carried out as follows. The friction materials of the present invention were heated in a furnace of 4000C for three hours, then immersed in an aqueous solution of 5% brine for one hour, and subjected to a shelf test for one month. Then, the surfaces and inner portions of the friction materials were polished and observed. The identification of the fade characteristic was in accordance with JASO Test Code c406-74.
Seven friction materials were tested as indicated in the following Table in which the figures represent percentages by weight. Material 1 contains no zinc dust and is included for the purposes of comparison.
No. of Examples 1 2 3 4 5 6 7
Ingredient
Zinc Dust 0 1 5 8 10 12 15
Phenol Resin 7 7 7 7 7 7 7
Inorganic Filler 15 15 15 15 15 15 15
Cashew Dust 5 5 5 5 5 5 5
Graphite 13 13 13 13 13 13 13
iron Powder 30 29 25 22 20 18 15
Steel Wool 30 30 30 30 30 30 30
In the accompanying figure the solid circles represent amount of rust and open circles represent fade (,u).
As shown in the figure the amount of rust decreases remarkably with a mixing of only 1% of zinc dust or powder of the zinc compound, thereby enhancing the anti-rust characteristics, and the fade L does not lower sharply with mixing of an amount of zinc up to 10%. However, mixing of more than 10% zinc lowers the fade ju while the rust characteristics is still enhanced.
In accordance with the results of the test, for the friction material of the present invention, the amount of zinc is suitably determined in the range of 0.5-1 5 weight percent according to the use temperature of the resulting friction material.
Claims (5)
1. A semi-metallic friction material composition comprising iron metal and/or iron alloy, a thermosetting resin and zinc dust and/or a zinc compound in a proportion of 0.5-1 5 wt %.
2. A semi-metallic friction material composition according to claim 1, wherein the iron metal and/or iron alloy is steel wool and/or iron powder.
3. A semi-metallic friction material composition according to claim 1 or 2, wherein the thermosetting resin is a phenolic resin, an epoxy resin or a melamine resin.
4. A semi-metallic friction material composition according to any of claims 1 to 3 which contain zinc dust.
5. A lining material for drum brakes or a friction pad for disc brakes which comprises a semimetallic friction material according to any of claims 1 to 4.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13239181A JPS5834885A (en) | 1981-08-24 | 1981-08-24 | Semimetallic friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2107337A true GB2107337A (en) | 1983-04-27 |
Family
ID=15080282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08224269A Withdrawn GB2107337A (en) | 1981-08-24 | 1982-08-24 | Semi-metallic friction material |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5834885A (en) |
| GB (1) | GB2107337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2260988A (en) * | 1991-10-30 | 1993-05-05 | Ferodo Ltd | Brake pads |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6247079B2 (en) * | 2013-11-12 | 2017-12-13 | 曙ブレーキ工業株式会社 | Friction material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56161428A (en) * | 1980-05-16 | 1981-12-11 | Aisin Seiki Co Ltd | Nonasbestos friction material |
-
1981
- 1981-08-24 JP JP13239181A patent/JPS5834885A/en active Granted
-
1982
- 1982-08-24 GB GB08224269A patent/GB2107337A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2260988A (en) * | 1991-10-30 | 1993-05-05 | Ferodo Ltd | Brake pads |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5834885A (en) | 1983-03-01 |
| JPH0238811B2 (en) | 1990-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |