ZA200604173B - Friction material - Google Patents

Friction material Download PDF

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Publication number
ZA200604173B
ZA200604173B ZA200604173A ZA200604173A ZA200604173B ZA 200604173 B ZA200604173 B ZA 200604173B ZA 200604173 A ZA200604173 A ZA 200604173A ZA 200604173 A ZA200604173 A ZA 200604173A ZA 200604173 B ZA200604173 B ZA 200604173B
Authority
ZA
South Africa
Prior art keywords
friction material
material according
fibers
namely
metal
Prior art date
Application number
ZA200604173A
Inventor
Steinmetz Stefan
Elison Hans-Dieter
Joerg Meiers
Kraus Martin
Runge Oliver
Original Assignee
Luk Lamellen & Kupplungsbau
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Luk Lamellen & Kupplungsbau filed Critical Luk Lamellen & Kupplungsbau
Publication of ZA200604173B publication Critical patent/ZA200604173B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02Composition of linings ; Methods of manufacturing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02Composition of linings ; Methods of manufacturing
    • F16D69/025Compositions based on an organic binder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02Composition of linings ; Methods of manufacturing
    • F16D69/025Compositions based on an organic binder
    • F16D69/026Compositions based on an organic binder containing fibres

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Lubricants (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

The friction material comprises at least one polyimide and/or polyamideimide in combination with at least one phosphate chosen from the groups of alkali phosphates, alkaline earth phosphate and ammonium phosphates.

Description

Friction material
The invention relates to friction materials and mixtures of substances for producing friction materials, which are intended in particular for use in clutch disks and brakes, i.e. for transferring or bracing torque. Friction materials that consist of a mixture of different substances are known.
Friction materials for use in connection with clutch disks consist for example of a mixture of fibers such as mineral fibers, filler and binder, as well as possibly other additives that affect the friction and wear properties as well as temperature resistance.
The object of the present invention was to create friction material compositions or mixtures for the production of friction materials and friction linings made from them, which are tolerant of high thermal and mechanical demands and nevertheless ensure a relatively high coefficient of friction. Furthermore, good consistency of the coefficient of friction should continue to be ensured over a wide temperature range. In addition, the mixtures according to the invention and the friction linings made thereof should ensure practically grab-free torque transfer through frictional engagement, whereby driving comfort can be significantly increased for example by the use of such friction linings in connection with motor vehicle clutch disks.
The tasks underlying the invention are addressed according to an exemplary embodiment wherein the friction material consists of at least two component substances, which include at least one polyimide and/or polyamideimide in combination with at least one phosphate of the heavy alkaline phosphates, alkaline earth phosphates and ammonium phosphates.
The tasks according to the invention can also be addressed in an advantageous manner by using friction linings which are produced on the basis of a mixture of component substances that contains at least one polyimide and/or polyamideimide in combination with at least one metal sulfide. Instead of at least one metal sulfide, or in addition thereto, at least one metal oxide may also be used.
Using a polyimide makes it possible to increase the temperature resistance of the friction lining significantly, since polyimide tolerates high temperatures, for example up to approximately 400° Celsius. Adding at least one phosphate from the groups of alkaline phosphates, alkaline earth phosphates and ammonium phosphates makes it possible to increase the coefficient of friction while retaining relatively low wear of the friction
AMENDED SHEET DATED 29 OCTOBER 2007
© WO 2006/057042 PCT/DE2004/002513 material. In an advantageous way, the proportion of phosphate can be 1 to 25 weight percent. Weight percent means the weight-based proportion of the total weight of dry mixed component substances. The percentages by weight of most of the substances that make up a friction lining are also present in the finished friction lining. It has proven to be especially advantageous to use tricalcium phosphate and/or trisodium phosphate.
Admixing at least one metal sulfide also makes it possible to produce friction linings with good wear resistance. It has proven to be especially effective to use at least one of the following sulfides, namely tin sulfide, bismuth sulfide, iron sulfide or manganese sulfide.
If at least one metal oxide is used, then tin oxide and/or zinc oxide and/or manganese oxide and/or iron oxide may be used advantageously.
The proportion by weight of polyimide and/or polyamideimide can be 20 to 60 percent.
These substances can be admixed in a resiniform and/or powdered and/or granular state or a combination of those structures.
Other resiniform, powdered or granular binders can also be admixed advantageously.
In order to be able to adapt the wear and friction properties of the particular use, it can be advantageous to admix at least one of the following metals, namely copper, brass, tin and zinc. The proportion of metal can be 1 to 30 weight percent. Such metal additives can be added in the form of powder, fibers or chips.
Furthermore, at least one filler can be added advantageously which may be at least one of the following substances, namely barium sulfate, calcium carbonate, kaolin, microscopic hollow spheres, magnesium carbonate. The proportion of filler can be 10 to 50 percent.
Fibers that consist of at least one of the following fiber types can also be admixed advantageously, namely carbon fibers, aramid fibers, glass fibers, metal fibers, ceramic fibers.
The use of such fibers makes it possible to increase the bursting strength of the friction lining. However, employing such fibers also makes it possible to adjust the friction coefficient of the friction linings so constructed, and also their wear performance, to the specific application. The total proportion of fibers can be 1 to 50 weight percent.
Furthermore, it can be especially effective if lubrication is admixed which may consist of at least one of the following substances, namely coke, graphite, carbon black, metal sulfide. Admixing such substances also makes it possible to affect the wear behavior and the friction coefficient of the finished friction lining. For example, by mixing in coke, graphite etc. a friction coefficient that is initially too high can be reduced to a desirable value, while at the same time the wear resistance of the friction lining can be increased, at least with some mixtures.
Advantageously, the total weight proportion of phosphates and lubricants is 10 to 50 weight percent.

Claims (18)

What is claimed is:
1. A friction material consisting of at least two component substances, characterized in that at least one polyimide and/or polyamideimide is admixed with at least one phosphate from the groups of alkaline phosphates, alkaline earth phosphates and ammonium phosphates are contained as component substances in the friction material.
2. A friction material according to Claim 1, characterized in that it contains 20 to 60 weight percent polyimide and/or polyamideimide.
3. A friction material according to Claim 1 or 2, characterized in that it contains 1 to 25 weight percent phosphate.
4 A friction material according to Claim 2, characterized in that it contains at least one phosphate from the groups of alkaline phosphates, alkaline earth phosphates and ammonium phosphates.
5. A friction material according to one of Claims 1 through 4, characterized in that tricalcium phosphate and/or trisodium phosphate is used.
6. A friction material according to one of Claims 3 through 6, characterized in that it contains at least one metal sulfide.
7. A friction material according to Claim 6, characterized in that it contains at least one of the following sulfides, namely tin sulfide, bismuth sulfide, iron sulfide, manganese sulfide.
8. A friction material according to one of Claims 1 through 7, characterized in that it contains as filler at least one of the following substances, namely barium sulfate, calcium carbonate, kaolin, microscopic hollow glass spheres, magnesium carbonate. AMENDED SHEET DATED 29 OCTOBER 2007
9. A friction material according to Claim 8, characterized in that the proportion of filler is 10 to 50 weight percent.
10. A friction material according to one of Claims 1 through 9, characterized in that it contains fibers that consist of at least one of the following sorts of fibers, namely carbon fibers, aramid fibers, glass fibers, metal fibers, ceramic fibers.
11. A friction material according to Claim 10, characterized in that the proportion of fiber is 1 to 50 weight percent of the total weight.
12. A friction material according to one of Claims 1 through 11, characterized in that it contains at least one of the following substances as a lubricant, namely coke, graphite, carbon black, metal sulfide.
13. A friction material according to one of Claims 1 through 12, characterized in that the weight proportion of phosphate and lubricants is 10 to 50 percent.
14. A friction material according to one of Claims 1 through 13, characterized in that it contains at least one metal that is admixed in one of the following forms, namely in the form of chips, fibers or powder.
15. A friction material according to Claim 14, characterized in that it contains at least one of the following metals, namely copper, brass, tin, zinc.
16. A friction material according to Claim 13 or 14, characterized in that the proportion of metal is 1 to 30 weight percent.
17. A friction material according to one of Claims 1 through 16, characterized in that it contains at least one metal oxide.
18. A friction material according to one of Claims 1 through 17, AMENDED SHEET DATED 29 OCTOBER 2007 characterized in that it contains at ieast one of the following metal oxides, namely tin oxide, zinc oxide, manganese oxide, iron oxide.
AMENDED SHEET DATED 29 OCTOBER 2007
ZA200604173A 2003-12-12 2004-11-13 Friction material ZA200604173B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10358776 2003-12-12

Publications (1)

Publication Number Publication Date
ZA200604173B true ZA200604173B (en) 2007-10-31

Family

ID=34638712

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA200604173A ZA200604173B (en) 2003-12-12 2004-11-13 Friction material

Country Status (8)

Country Link
EP (1) EP1694979B1 (en)
KR (1) KR101135807B1 (en)
CN (1) CN1894518B (en)
AT (1) ATE455973T1 (en)
BR (1) BRPI0417494B1 (en)
DE (3) DE112004002727D2 (en)
WO (1) WO2005057042A2 (en)
ZA (1) ZA200604173B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005003507B4 (en) * 2005-01-26 2009-01-02 Luk Lamellen Und Kupplungsbau Beteiligungs Kg clutch disc
DE102007061459B4 (en) * 2006-12-27 2020-10-08 Akebono Brake Industry Co., Ltd. Asbestos-free friction material
DE202010003143U1 (en) * 2009-06-30 2010-06-02 Honeywell Bremsbelag Gmbh Friction lining mixture for a friction material, in particular for brake and clutch linings
CN102031088B (en) * 2010-12-09 2013-03-13 南京航空航天大学 Inorganic-organic composite friction material and preparation method thereof
CN103511512B (en) * 2013-10-22 2015-12-02 宁波佳轩新材料有限公司 Automobile brake sheet
CN103911118A (en) * 2014-04-01 2014-07-09 南京航空航天大学 Polyimide friction material for rotary ultrasonic motor and preparation method of polyimide friction material
WO2017096119A1 (en) * 2015-12-04 2017-06-08 Schaeffler Technologies AG & Co. KG Flexible wet friction materials including silane
CN107387616A (en) * 2017-08-08 2017-11-24 长沙五犇新材料科技有限公司 One kind friction layer material
JP7323310B2 (en) * 2019-03-20 2023-08-08 曙ブレーキ工業株式会社 friction material
JP7372111B2 (en) * 2019-10-25 2023-10-31 曙ブレーキ工業株式会社 Friction material
CN115109408A (en) * 2021-05-17 2022-09-27 青岛中科润持新材料科技有限公司 Preparation method of polyamide imide based composite thrust bearing suitable for oil lubrication working condition

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3038264A1 (en) * 1980-10-10 1982-05-19 Basf Ag, 6700 Ludwigshafen METHOD FOR THE CONTINUOUS PRODUCTION OF RUBBER-MODIFIED POLYMERISATES OF VINYL FLAVORS
US4411959A (en) * 1981-08-17 1983-10-25 Westinghouse Electric Corp. Submicron-particle ductile superconductor
AT396365B (en) * 1991-01-28 1993-08-25 Chemson Polymer Additive ADDITIONAL FOR FRICTION COATING MIXTURES CONTAINING MANGANE-II SULFIDE
JP2827136B2 (en) * 1990-08-27 1998-11-18 日清紡績株式会社 Non-asbestos friction material
GB9318764D0 (en) * 1993-09-10 1993-10-27 Wabco Holdings Sab Improvements relating to friction pads for use in disc brakes
AT400718B (en) 1994-03-17 1996-03-25 Chemson Polymer Additive ADDITIONAL FOR, IN PARTICULAR RESIN-TIED, FRICTION COATING MIXTURES AND FRICTION COVERS
JPH08245949A (en) * 1995-03-08 1996-09-24 Sumitomo Electric Ind Ltd Dry-type friction material and its production
CN1186827A (en) * 1996-12-24 1998-07-08 中国科学院兰州化学物理研究所 Polyimide self lubricating composite material

Also Published As

Publication number Publication date
DE112004002727D2 (en) 2006-11-09
BRPI0417494B1 (en) 2018-05-29
CN1894518A (en) 2007-01-10
BRPI0417494A (en) 2007-05-29
EP1694979A2 (en) 2006-08-30
ATE455973T1 (en) 2010-02-15
WO2005057042A2 (en) 2005-06-23
WO2005057042A3 (en) 2005-09-15
CN1894518B (en) 2010-06-30
DE102004054990A1 (en) 2005-07-07
DE502004010689D1 (en) 2010-03-11
KR101135807B1 (en) 2012-04-16
EP1694979B1 (en) 2010-01-20
KR20060123123A (en) 2006-12-01

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