GB2160552A - Process for the production of carbon fibre-reinforced elastomer bodies - Google Patents
Process for the production of carbon fibre-reinforced elastomer bodies Download PDFInfo
- Publication number
- GB2160552A GB2160552A GB08514768A GB8514768A GB2160552A GB 2160552 A GB2160552 A GB 2160552A GB 08514768 A GB08514768 A GB 08514768A GB 8514768 A GB8514768 A GB 8514768A GB 2160552 A GB2160552 A GB 2160552A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fibres
- laminar
- fibre
- production
- chopped
- 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.)
- Granted
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 32
- 239000000806 elastomer Substances 0.000 title claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 12
- 230000008569 process Effects 0.000 title claims description 12
- 239000000835 fiber Substances 0.000 claims abstract description 24
- 239000006185 dispersion Substances 0.000 claims abstract description 18
- 229920000126 latex Polymers 0.000 claims abstract description 11
- 239000004816 latex Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims description 16
- 229920001577 copolymer Polymers 0.000 claims description 4
- DGXAGETVRDOQFP-UHFFFAOYSA-N 2,6-dihydroxybenzaldehyde Chemical compound OC1=CC=CC(O)=C1C=O DGXAGETVRDOQFP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 abstract description 18
- 238000001035 drying Methods 0.000 abstract description 4
- 238000010348 incorporation Methods 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 238000004513 sizing Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 239000004753 textile Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920002239 polyacrylonitrile Polymers 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N Bisphenol A Natural products C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical class C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 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
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1025—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by non-chemical features of one or more of its constituents
- C09K3/1028—Fibres
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0204—Elements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0204—Elements
- C09K2200/0208—Carbon
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0239—Oxides, hydroxides, carbonates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0243—Silica-rich compounds, e.g. silicates, cement, glass
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0243—Silica-rich compounds, e.g. silicates, cement, glass
- C09K2200/0252—Clays
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0278—Fibres
- C09K2200/0282—Carbon fibres
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0607—Rubber or rubber derivatives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0642—Copolymers containing at least three different monomers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0645—Macromolecular organic compounds, e.g. prepolymers obtained otherwise than by reactions involving carbon-to-carbon unsaturated bonds
- C09K2200/067—Condensation polymers of aldehydes or ketones
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Reinforced Plastic Materials (AREA)
- Braking Arrangements (AREA)
Abstract
In the production of laminar elastomer bodies which contain carbon fibres as reinforcing components, carbon fibre multifilament yarn is coated with a latex dispersion and, after drying, is chopped up into pieces which are whirled to form a loose fibre feed. The coated fibres do not break up on incorporation in a elastomer matrix and adhere to it well. The thus produced reinforced laminar elastomer bodies may be used in manufacture of flat seals, brake and clutch linings.
Description
SPECIFICATION
Process for the production of carbon fibre-reinforced elastomer bodies
This invention relates to a process for the production of laminar elastomer bodies reinforced with carbon fibres.
The carbon fibres produced almost exclusively by pyrolysis of polymers present in fibre form are used predominantly as reinforcement for synthetic resins, for example epoxy, polyester and polyamide resins.
Carbon fibre-reinforced synthetic resins have, for what are lower masses than metallic materials, a greater strength and rigidity and are correspondingly especially advantageous materials in vehicle construction, for example for spacecraft, aircraft and surface vehicles. Carbon fibres are likewise used as replacements for asbestos in seals and friction linings which chiefly contain an elastomer as matrix.
The most important starting fibres for carbon fibres are fibres formed of polyacrylonitrile and pitch. On heating the fibres to about 200 to 300 C, in general in an oxidising atmosphere, the starting materials are cross-linked or thermally stabilised while retaining the fibre form. The stabilised fibres are infusible and are denoted hereinafter, like the completely pyrolysed, exclusively carbon containing fibres, as carbon fibres. Cross-linking and pyrolysis produce temperature-resistant fibres with high strength and rigidity which, in principle, can be worked with like other textile fibres. At the same, the brittleness and the low breaking strength disadvantageously make their handling and working up to textiles increasingly difficult.
It is known that the capacity of carbon fibres for handling is improved by coating with sizing compositions. Differing from the coating usual even with other textile fibres, problems then arise with the use of sizing compositions if the coated fibres are employed in a matrix. Sizing compositions should at least not influence the bonding of the fibres with the matrix, improving this as much as possible, i.e. they must be compatible with the matrix in question. Apparently there are no sizing compositions which make possible a satisfactory working up of the carbon fibres in textiles and also are compatible with all the usual and technically necessary matrix systems. Correspondingly, sizing compositions have only become known, which fulfil the requirements for one or a few matrix resins.For example carbon fibres covered with diglycidyl ethers of bisphenol A bond well with an epoxy resin matrix, but insufficiently in a polybutylene terephthalate matrix (US-A 4 364 993). For specific thermoplastic matrix resins, such as polycarbonate or polyamide, coatings with polyurethane solutions and dispersions should be of advantage (DE-A-33 02 012). These sizing compositions named by way of example, and others which have become known, are not suitable however for bonding carbon fibres in an elastomer matrix. With laminar elastomer bodies, which can be used as seals, clutch and brake linings, carbon fibres there employed as reinforcing material are not as a rule distributed and bonded uniformly in the elastomer matrix, so that the properties of the products will only correspond partially and sometimes not at all to the requirements imposed by the intended use.
According to the present invention, there is provided a process for the production of a laminar elastomer body reinforced with carbon fibres, in which
a) carbon multifilament yarn with at least 40,000 filaments is sized with a latex dispersion, the coated yarn is dried, chopped up into 0.5 to 20 mm long pieces and a feed is formed from the chopped up fibres by whirling them in a current of air, and
b) the fibre feed is mixed with an elastomer composition and the mixture is rolled out to a laminar form.
This invention represents an improvement over prior art and processes for the production of laminar structures from carbon fibre-containing elastomers, especially the handling of the carbon fibres, under the conditions prevailing in the production of the composite body, in that the numbr of fibre breakages is reduced, and the fibres are distributed uniformly in the elastomer matrix and strongly bound therein. The product obtained after the rolling out stage is suitable for working up to form seals, brake or clutch linings.
When carrying out the invention, it is necessary firstly to coat the carbon fibres with a sizing composition compatible with the matrix and then to bring the coated fibres into the form of a loose feed. The sizing of fibres formed of rayon, polyamides and, after a special pre-treatment, even of polyesters and arylamides, with latex dispersions and the working-in of the coated fibres into elastomers and the improved bonding of such treated fibres in the elastomer matrix is known as such. However on account of the basically different condition of the surface of carbon fibres, the man skilled in the art could not expect that carbon fibres coated with latex behave similarly in admixture with elastomers and in particular that the coated brittle fibres are not broken up on working into the elastomer materials and destroyed.The effect is however only achieved if the coated carbon fibres are whirled in a current of air to form a fibre feed. Without the formation of a loose feed, there is also no success in distributing the fibres uniformly in the elastomer matrix.
The carbon fibres are coated with an aqueous latex dispersion, preferably with such dispersion containing additionally a butadiene-styrene-vinylpyridine copolymer, with which the bonding effect is somewhat better. It is likewise of advantage to add to the dispersion a resorcinol-formaldehyde precondensate which contains these substances approximately in a ratio of 10:1 to 2:1. The precondensate content in the dispersion should not amount to more than 10% by weight, since with higher contents the filaments of the yarn can stick to one another. Amounts of precondensate in the dispersion less than 2% by weight are generally insufficient.In accordance with current nomenclature, what is understood by the term "elastomer" are natural and synthetic materials whose glass transition temperature is less than O"C and less than the use temperature; such elastomers are typically natural and synthetic rubber. The carbon fibre yarn used for the reinforcement of the elastomer - including yarn formed of thermally stabilised fibres - should contain at least 40,000 filaments, since a uniform distribution is not achieved with yarns of smaller filament count. The yarns are conveniently drawn through a trough filled with the latex dispersion and for drying, through a drying channel or furnace and the coated yarns are chopped up into pieces 0.5 to 20 mm in length. For cutting up of the yarn, basically any tools used for the production of short cut fibres are suitable, for example cutting bars or rotating knives.The fibre pieces are then whirled in a current of air and a fibre feed whose bulk density amounts advantageously to 20 to 200 gil is separated off in a filter or cylcone. The length of the fibre pieces and the density of the fibre feed are determined in each case according to the use for the fibre reinforced elastomer material and can be determined by simple preliminary experiments. The length of the fibres contained in the fibre feed preferably amounts to approximately 1 to 20 mm and the bulk density preferably is 20 to 200 girl. The fibre feed is incorporated in the elastomer matrix with the aid of the usual rotary mixer and the mixture is rolled out to a laminar shape.The fibre content is dependent on the intended use of the elastomer body, amounting to about 5 to 20% by weight for friction linings and to more than 20% by weight for seals.
The following Example illustrates the invention:
Example
A multifilament yarn formed of thermally stabilised polyacrylonitrile, with 320,000 filaments, a titre of 42 ktex and a density of 1.40 g/cm3 was coated with an aqueous latex dispersion which had the composition:
Free water 61.5% by wt.
Ammonia 0.2% by wt.
Latex dispersion contain- 30.0% by wt. (Solids
ing butadiene-styrene- content - 40%)
vinylpyridine copolymer
Resorcinol-formaldehyde 8.3% by wt. (Solids
precondensate content - 30%)
The dispersions containing the butadiene-styrene- vinylpyridine copolymer are commercially available products.
The multifilament yarn was drawn through a trough filled with the dispersion; the immersion time amounted to about 1 minute. The coated yarn was warmed at room temperature and in a drying channel to about 130 to 140"C, chopped up in a cutting mill into pieces of about 3 to 10 mm length and then whirled in a current of air. The fibre feed with a bulk density of about 50 gll was separated off in a cyclone, was incorporated in chloroprene rubber in a rotary mixer and fillers and vulcanisation agents were added to the mixture whose final composition was:
Chloroprene rubber - 20% by wt.
Coated fibres - 18% by wt.
Iron oxide - 15% by wt.
Magnesium oxide - 15% by wt.
Talc - 15%bywt.
Calcium hydroxide - 10% by wt.
Graphite - 5% by wt.
Sulphur - 1% by wt.
Zinc oxide - 1% by wt.
The mixture was granulated and pressed by means of die presses at about 160"C and a pressure of 20
MPa to laminar discs which were post vulcanised by heating in a circulatory furnace to about 180 C.
The microscopic examination of the discs provided as friction lining for disc and drum brakes showed, with the major part of the thermally stabilised polyacrylonitrile fibres, no reduction of the fibre length on mixing and shaping of the elastomer material, uniform distribution of fibres in the matrix and very good fibre bonding. Correspondingiv, the variation in the wear measured on a test bench and in the braking effect (retardation) was small.
Claims (11)
1. A process for the production of a laminar elastomer body reinforced with carbon fibres, in which
a) carbon multifilament yarn with at least 40,000 filaments is sized with a latex dispersion, the coated yarn is dried,chopped up into 0.5 to 20 mm long pieces and a feed is formed from the chopped up fibres by whirling them in a current of air, and
b) the fibre feed is mixed with an elastomer composition and the mixture is rolled out to a laminar form.
2. A process according to claim 1, in which a latex dispersion containing additionally butadiene-styrene- vinylpyridine copolymer is used to coat the chopped yarn pieces.
3. A process according to claim 1 or 2, in which a latex dispersion additionally containing a resorcinol- formaldehyde precondensate is used to coat the chopped yarn pieces.
4. A process according to claims 3, wherein a dispersion with a precondensate content of 2 to 10% is used.
5. A process according to any one of claims 1 to 4, wherein the fibre feed which is formed has a bulk density of 20 to 200 g/l.
6. A process for the production of a laminar elastomer body, substantially as described in the foregoing Example.
7. A laminar elastomer body, whenever produced by the process claimed in any preceding claim.
8. A flat seal which is formed from a laminar elastomer body as claimed in claim 7.
9. A flat seal as claimed in claim 8, which has a fibre content of at least 20% by weight.
10. A friction lining which is formed from a laminar elastomer body as claimed in claim 7.
11. A friction lining as claimed in claim 10, which has a fibre content of from 5 to 20% by weight.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843423163 DE3423163A1 (en) | 1984-06-22 | 1984-06-22 | METHOD FOR PRODUCING CARBON FIBER REINFORCED ELASTOMER BODIES |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8514768D0 GB8514768D0 (en) | 1985-07-10 |
| GB2160552A true GB2160552A (en) | 1985-12-24 |
| GB2160552B GB2160552B (en) | 1987-08-26 |
Family
ID=6238952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08514768A Expired GB2160552B (en) | 1984-06-22 | 1985-06-11 | Process for the production of carbon fibre-reinforced elastomer bodies |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE3423163A1 (en) |
| FR (1) | FR2566315B1 (en) |
| GB (1) | GB2160552B (en) |
| IT (1) | IT1186736B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0647793A1 (en) * | 1993-10-06 | 1995-04-12 | Avco Corporation | Low cost, asbestos-free friction material |
| EP1813405A1 (en) * | 2006-01-25 | 2007-08-01 | The Goodyear Tire & Rubber Company | Curing sleeve reinforced with chopped carbon fibers |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3718035A1 (en) * | 1987-05-28 | 1988-12-15 | Haendler & Natermann | Process for exhaust air purification and solvent recovery |
| DE4314193C1 (en) * | 1993-04-30 | 1994-05-26 | Baedje K H Meteor Gummiwerke | Safety switch with carbon fibre contacts - has contacts housed in elastomer tube produced by extrusion with parallel carbon fibre strips produced at the same time |
| DE10328373B4 (en) * | 2003-06-24 | 2015-10-08 | Continental Automotive Gmbh | Piezoelectric component with tempering device and use of the component |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1275412A (en) * | 1968-08-03 | 1972-05-24 | Dunlop Holdings Ltd | Reinforcing yarns or cords |
| GB1275258A (en) * | 1968-08-03 | 1972-05-24 | Dunlop Holdings Ltd | Reinforcing materials |
| IT948673B (en) * | 1971-02-25 | 1973-06-11 | Yamashita M | PROCEDURE FOR THE MANUFACTURE OF REINFORCED OBJECTS SYNTHETIC RESIN CABLES |
| JPS5333998B2 (en) * | 1974-01-16 | 1978-09-18 | ||
| US4364993A (en) * | 1980-07-14 | 1982-12-21 | Celanese Corporation | Sized carbon fibers, and thermoplastic polyester based composite structures employing the same |
| JPS58126375A (en) * | 1982-01-22 | 1983-07-27 | 東邦レーヨン株式会社 | Carbon fiber and resin composition thereof |
-
1984
- 1984-06-22 DE DE19843423163 patent/DE3423163A1/en active Granted
-
1985
- 1985-05-07 FR FR858506925A patent/FR2566315B1/en not_active Expired
- 1985-06-11 GB GB08514768A patent/GB2160552B/en not_active Expired
- 1985-06-21 IT IT21251/85A patent/IT1186736B/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0647793A1 (en) * | 1993-10-06 | 1995-04-12 | Avco Corporation | Low cost, asbestos-free friction material |
| EP1813405A1 (en) * | 2006-01-25 | 2007-08-01 | The Goodyear Tire & Rubber Company | Curing sleeve reinforced with chopped carbon fibers |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3423163C2 (en) | 1992-11-19 |
| IT8521251A0 (en) | 1985-06-21 |
| GB8514768D0 (en) | 1985-07-10 |
| IT1186736B (en) | 1987-12-16 |
| GB2160552B (en) | 1987-08-26 |
| FR2566315A1 (en) | 1985-12-27 |
| FR2566315B1 (en) | 1989-05-19 |
| DE3423163A1 (en) | 1986-02-27 |
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| Date | Code | Title | Description |
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| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940611 |