DE4232004A1 - Light-coloured antistatic rubber mixts. for wheel and rollers - contg. sulphur-crosslinkable rubber, light-coloured filler, normal additives, and short carbon@ or steel fibres to increase conductivity for less contact soiling - Google Patents

Light-coloured antistatic rubber mixts. for wheel and rollers - contg. sulphur-crosslinkable rubber, light-coloured filler, normal additives, and short carbon@ or steel fibres to increase conductivity for less contact soiling

Info

Publication number
DE4232004A1
DE4232004A1 DE19924232004 DE4232004A DE4232004A1 DE 4232004 A1 DE4232004 A1 DE 4232004A1 DE 19924232004 DE19924232004 DE 19924232004 DE 4232004 A DE4232004 A DE 4232004A DE 4232004 A1 DE4232004 A1 DE 4232004A1
Authority
DE
Germany
Prior art keywords
light
rubber
mixts
coloured
wheel
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Withdrawn
Application number
DE19924232004
Other languages
German (de)
Inventor
Reinhard Dr Hoppenheit
Rolf Krueck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental AG
Original Assignee
Continental AG
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 Continental AG filed Critical Continental AG
Priority to DE19924232004 priority Critical patent/DE4232004A1/en
Priority to BE9300988A priority patent/BE1008204A3/en
Publication of DE4232004A1 publication Critical patent/DE4232004A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/08—Electric-charge-dissipating arrangements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys

Abstract

The mixts. (I) contain (a) sulphur-crosslinkable rubber(s) or rubber-thermoplastic elastomer blend(s), (b) a light-coloured filler and (c) conventional processing additives. To increase conductivity, mixt. (I) also contains at least 3 vol. % short chopped carbon and/or steel fibres (II), giving the wheel or roller a leakage resistance of less than 10 power-4 ohms. Fibres (II) are pref. 0.1-15 (0.1-7) mm long, and comprises steel fibres only; and pref. elastomer is natural rubber only. The mixt. also contains colouring material(s). USE/ADVANTAGE - The non-chalking antistatic mixts. for the above applications, are classed as "conductive" mixts. w.r.t. DIN-IEC 601 Part 1, and cause considerably less contact soiling of floors, etc. e.g. prior-art mixts. contg. carbon black.

Description

Die Erfindung betrifft eine helle Mischung auf Elastomerbasis für Räder und Rollen, insbesondere zur Verwendung im medizinischen Bereich, wobei die Mischung zumindest einen mit Schwefel oder mit Schwefelspender vernetzbaren Kautschuk oder Verschnitte aus Kautschuk und einem thermoplastischen Elastomer sowie einen hellen Füllstoff und übliche Verarbeitungshilfen enthält.The invention relates to a light mixture Elastomer base for wheels and rollers, in particular for Use in the medical field, with the mixture at least one with sulfur or sulfur donor crosslinkable rubber or blends of rubber and a thermoplastic elastomer and a bright Contains filler and common processing aids.

Es sind helle Mischungen für Räder und Rollen auf Elastomerbasis wie auch auf Kunststoffbasis im medizinischen Bereich bekannt. Es sind weiterhin Mischungen mit rußgefüllten Elastomeren bekannt, die jedoch in den schmutzempfindlichen Bereichen zu erheblichen Reinigungsproblemen führen. Mit einer hellen Mischung verhindert man ein sogenanntes Abkreiden, zum anderen weist sie ein günstigeres Kontaktverfärbungs­ verhalten auf.There are bright blends for wheels and wheels on Elastomer base as well as on plastic basis in known medical field. It is still Mixtures with carbon black-filled elastomers known, the however, in the dirt sensitive areas too lead to significant cleaning problems. With a bright Mixture prevents a so-called chalking, for Others, it has a better contact discoloration behave on.

Der Erfindung liegt die Aufgabe zugrunde, eine eingangs genannte Mischung anzugeben, die sich darüber hinaus durch eine relativ hohe Leitfähigkeit auszeichnet.The invention is based on the object, an input specify the mixture mentioned above a relatively high conductivity is characterized.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Mischung zur Erhöhung der Leitfähigkeit in einem Anteil von zumindest 3 Vol.-% Kurzschnittfasern aus Kohlenstoff und/oder Stahl enthält, die dem Rad oder der Rolle einen Ableitwiderstand von <104Ω verleihen.This object is achieved in that the mixture to increase the conductivity in a proportion of at least 3 vol .-% short cut fibers made of carbon and / or steel, which give the wheel or the role of a discharge resistance of <10 4 Ω.

Mit der Erfindung erzielt man den Vorteil, daß auf schmutzempfindlichen Böden der Reinigungsaufwand durch Verwendung der nichtkreidenden antistatisch wirksamen Mischung erheblich reduziert wird. Gleichzeitig erhält man eine "leitfähige" Mischung im Sinne der DIN-Norm IEC 601 Teil 1.With the invention provides the advantage that on dirt-sensitive floors of the cleaning effort by  Use of non-chilling antistatic agents Mixture is significantly reduced. At the same time you get a "conductive" mixture in the sense of the DIN standard IEC 601 Part 1.

Nach einer vorteilhaften Ausgestaltung der Erfindung liegen die Fasern in einem Längenbereich von 0,1 bis 15 mm, bevorzugt in einem solchen von 0,1 bis 7 mm. Ein vorteilhaftes Ausführungsbeispiel der Erfindung zeichnet sich dadurch aus, daß als Elastomer ausschließlich Naturkautschuk zur Anwendung gelangt. Um optischen Wünschen gerecht zu werden, können der Mischung ein oder mehrere Farbstoffe zugefügt sein.According to an advantageous embodiment of the invention the fibers are in a length range of 0.1 to 15 mm, preferably in such a range of 0.1 to 7 mm. On advantageous embodiment of the invention is characterized characterized in that as the elastomer exclusively Natural rubber is used. To optical To meet wishes, one or the mixture can several dyes added.

Nachfolgend werden drei Beispiele der Mischung dargestellt, wobei im ersten Beispiel als Elastomer ausschließlich Naturkautschuk vorkommt, während im zweiten und dritten Beispiel ein Verschnitt aus Naturkautschuk und einem thermoplastischen Elastomer vorliegt. Im ersten Beispiel kommt ein Gemisch aus Kurzschnitt-Stahlfasern und Kurzschnitt-Kohlefasern zum Einsatz, im zweiten Beispiel sind ausschließlich Kurzschnitt-Kohlefasern enthalten, im dritten dagegen ausschließlich Kurzschnitt-Stahlfasern.
In the following, three examples of the mixture are shown, wherein in the first example only natural rubber occurs as the elastomer, while in the second and third examples a blend of natural rubber and a thermoplastic elastomer is present. In the first example, a mixture of short cut steel fibers and short cut carbon fibers is used, in the second example only short cut carbon fibers are included, in the third only short cut steel fibers.

1. Beispiel1st example Gew.-T.Pw Komponentecomponent 100,0100.0 Naturkautschuk (NSR 10)Natural rubber (NSR 10) 0,30.3 Mastiziermittel (Pepton 7003 M)Masticating agent (Peptone 7003 M) 3,03.0 Zinkweißzinc 10,010.0 Titandioxid AnatasTitanium dioxide anatase 12,012.0 aktive Kieselsäure (Ultrasil VN 3)active silicic acid (Ultrasil VN 3) 1,51.5 mikrokristallines Wachs (LSW Standard)microcrystalline wax (LSW standard) 5,05.0 Schwefelsulfur 1,81.8 Beschleuniger CBSAccelerator CBS 3,03.0 Beschleuniger MBTSAccelerator MBTS 0,40.4 Beschleuniger DPGAccelerator DPG 0,20.2 Verzögerer (CTP)Retarder (CTP) 38,538.5 Kurzschnitt-StahlfaserShort-cut steel fiber 38,5 38.5 Kurzschnitt-Kohlefaser (Carboflex P 100)Short cut carbon fiber (Carboflex P 100) 214,2214.2 Summetotal

2. Beispiel2nd example Gew.-T.Pw Komponentecomponent 7070 Naturkautschuknatural rubber 3030 Polypropylenpolypropylene 1515 Weichmachersoftener 1515 Kieselsäuresilica 120120 Kurzschnitt-KohlefasernShort-cut carbon fibers 11 TitandioxidTitanium dioxide 44 Zinkoxidzinc oxide 11 Stearinsäurestearic acid 11 Schwefelspendersulfur donors

3. Beispiel3rd example Gew.-T.Pw Komponentecomponent 7070 Naturkautschuknatural rubber 3030 Polypropylenpolypropylene 1515 Weichmachersoftener 1515 Kieselsäuresilica 7575 Kurzschnitt-KohlefasernShort-cut carbon fibers 11 TitandioxidTitanium dioxide 44 Zinkoxidzinc oxide 11 Stearinsäurestearic acid 11 Schwefelspendersulfur donors

Claims (6)

1. Helle Mischung auf Elastomerbasis für Räder und Rollen, insbesondere zur Verwendung im medizinischen Bereich, wobei die Mischung zumindest einen mit Schwefel oder mit Schwefelspender vernetzbaren Kautschuk oder Verschnitte aus Kautschuk und einem thermoplastischen Elastomer sowie einen hellen Füllstoff und übliche Verarbeitungshilfen enthält, dadurch gekennzeichnet, daß die Mischung zur Erhöhung der Leitfähigkeit in einem Anteil von zumindest 3 Vol.-% Kurzschnittfasern aus Kohlenstoff und/oder Stahl enthält, die dem Rad oder der Rolle einen Ableitwiderstand von <104Ω verleihen.1. A bright elastomer-based mixture for wheels and rollers, in particular for use in the medical field, wherein the mixture contains at least one sulfur or sulfur donor crosslinkable rubber or blends of rubber and a thermoplastic elastomer and a light filler and conventional processing aids, characterized in that the mixture contains at least 3% by volume of short cut fibers of carbon and / or steel, which impart a discharge resistance of <10 4 Ω to the wheel or the roll in order to increase the conductivity. 2. Mischung nach Anspruch 1, dadurch gekennzeichnet, daß die Fasern im Längenbereich 0,1 bis 15 mm liegen.2. Mixture according to claim 1, characterized in that the fibers are in the length range 0.1 to 15 mm. 3. Mischung nach Anspruch 1, dadurch gekennzeichnet, daß die Fasern im Längenbereich 0,1 bis 7 mm liegen.3. Mixture according to claim 1, characterized in that the fibers are in the length range 0.1 to 7 mm. 4. Mischung nach Anspruch 1, dadurch gekennzeichnet, daß ausschließlich Stahlfasern vorliegen.4. Mixture according to claim 1, characterized in that exclusively steel fibers are present. 5. Mischung nach Anspruch 1, dadurch gekennzeichnet, daß als Elastomer ausschließlich Naturkautschuk vorliegt.5. Mixture according to claim 1, characterized in that as elastomer exclusively natural rubber is present. 6. Mischung nach Anspruch 1, dadurch gekennzeichnet, daß ihr Farbstoffe zugefügt sind.6. Mixture according to claim 1, characterized in that their dyes are added.
DE19924232004 1992-09-24 1992-09-24 Light-coloured antistatic rubber mixts. for wheel and rollers - contg. sulphur-crosslinkable rubber, light-coloured filler, normal additives, and short carbon@ or steel fibres to increase conductivity for less contact soiling Withdrawn DE4232004A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19924232004 DE4232004A1 (en) 1992-09-24 1992-09-24 Light-coloured antistatic rubber mixts. for wheel and rollers - contg. sulphur-crosslinkable rubber, light-coloured filler, normal additives, and short carbon@ or steel fibres to increase conductivity for less contact soiling
BE9300988A BE1008204A3 (en) 1992-09-24 1993-09-22 Mixed light-based elastomer for wheels or rollers.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924232004 DE4232004A1 (en) 1992-09-24 1992-09-24 Light-coloured antistatic rubber mixts. for wheel and rollers - contg. sulphur-crosslinkable rubber, light-coloured filler, normal additives, and short carbon@ or steel fibres to increase conductivity for less contact soiling

Publications (1)

Publication Number Publication Date
DE4232004A1 true DE4232004A1 (en) 1994-03-31

Family

ID=6468732

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924232004 Withdrawn DE4232004A1 (en) 1992-09-24 1992-09-24 Light-coloured antistatic rubber mixts. for wheel and rollers - contg. sulphur-crosslinkable rubber, light-coloured filler, normal additives, and short carbon@ or steel fibres to increase conductivity for less contact soiling

Country Status (2)

Country Link
BE (1) BE1008204A3 (en)
DE (1) DE4232004A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0718127A1 (en) * 1994-12-21 1996-06-26 Sp Reifenwerke Gmbh Vehicle tyre
WO1998040229A1 (en) * 1997-03-10 1998-09-17 The Goodyear Tire & Rubber Company Tire with electrically oriented composite
WO2003077329A2 (en) * 2001-10-19 2003-09-18 Metalic Power, Inc. Polymer composites, electrodes and fuel cells

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2324589A (en) * 1942-07-10 1943-07-20 Formica Insulation Company Electroconductive wheel
DE3626954C1 (en) * 1986-08-08 1987-10-15 Tente Rollen Gmbh & Co Castor
AU5336190A (en) * 1989-03-03 1990-09-26 Hyperion Catalysis International Applications for graphite fibrils
JPH11202A (en) * 1997-06-13 1999-01-06 Bridgestone Sports Co Ltd Golf shoes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0718127A1 (en) * 1994-12-21 1996-06-26 Sp Reifenwerke Gmbh Vehicle tyre
US5942069A (en) * 1994-12-21 1999-08-24 Sp Reifenwerke Gmbh. Method of manufacturing tire
WO1998040229A1 (en) * 1997-03-10 1998-09-17 The Goodyear Tire & Rubber Company Tire with electrically oriented composite
WO2003077329A2 (en) * 2001-10-19 2003-09-18 Metalic Power, Inc. Polymer composites, electrodes and fuel cells
WO2003077329A3 (en) * 2001-10-19 2007-12-21 Metalic Power Inc Polymer composites, electrodes and fuel cells

Also Published As

Publication number Publication date
BE1008204A3 (en) 1996-02-13

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