DE699849C - Process for improving the thermal degradation of synthetic rubber in the form of fur - Google Patents

Process for improving the thermal degradation of synthetic rubber in the form of fur

Info

Publication number
DE699849C
DE699849C DE1938C0054591 DEC0054591D DE699849C DE 699849 C DE699849 C DE 699849C DE 1938C0054591 DE1938C0054591 DE 1938C0054591 DE C0054591 D DEC0054591 D DE C0054591D DE 699849 C DE699849 C DE 699849C
Authority
DE
Germany
Prior art keywords
synthetic rubber
thermal degradation
fur
improving
rubber
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.)
Expired
Application number
DE1938C0054591
Other languages
German (de)
Inventor
Dipl-Ing Richard Beckadolph
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 Gummi Werke 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 Gummi Werke AG filed Critical Continental Gummi Werke AG
Priority to DE1938C0054591 priority Critical patent/DE699849C/en
Application granted granted Critical
Publication of DE699849C publication Critical patent/DE699849C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00Conditioning or physical treatment of the material to be shaped
    • B29B13/10Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Description

Verfahren zum Verbessern des thermischen Abbaues von Kunstkautschuk in Fellform Das weitere Fortschreiten der Verwendung von Kunstkautschuk macht seine verstärktere Vorbehandlung notwendig, um ähnliche gebrauchs fähige Mischungen, wie beim Naturkautschuk, herstellen zu können. Verarbeitungstechnisch gesehen, unterscheidet sich Kunstkautschuk vom Naturkautschuk im wesentlichen dadurch, daß er nicht thermoplastisch ist. Es ergibt sich hieraus die Notwendigkeit einer weitgehenden Vorbehandlung, um die für die Aufnahme von Chemikalien unbedingt erforderliche Plastizität zu erreichen. Es ist bekannt, daß diese Plastizität durch Bearbeitung des Kautschuks auf Walzen (Mastizieren) oder durch Einwirken von Wärme (thermischer Abbau) erreicht werden kann. Der thermische Abbau hat sich -bei Kunstkautschuk als vorteilhaft erwiesen, so daß dieser fast nur noch nach dem thermischen Abbauverfahren verarbeitet wird.Process for improving the thermal degradation of synthetic rubber in fur form The further advancement of the use of synthetic rubber makes its more intensive pre-treatment is necessary in order to produce similar usable mixtures, such as in the case of natural rubber. From a processing point of view, it differs Synthetic rubber differs from natural rubber essentially in that it is not thermoplastic is. This results in the need for extensive pretreatment, in order to achieve the plasticity absolutely necessary for the absorption of chemicals. It is known that this plasticity is achieved by working the rubber on rollers (Mastication) or by the action of heat (thermal degradation) can. The thermal degradation has proven to be advantageous for synthetic rubber, so that this is almost exclusively processed according to the thermal degradation process.

Da jedoch durch die Einwirkung von Wärme eine Veränderung des Kunstkautschuks, und zwar nach der negativen Seite hin, erfolgt, so muß man bestrebt sein, diese Veränderung, die sowohl durch die Höhe als auch durch die Zeitdauer der Einwirkung der Temperatur bedingt wird, so gering als möglich eintreten zu lassen.However, since the action of heat changes the synthetic rubber, and indeed on the negative side, if it takes place, one must strive to achieve this Change caused by both the amount and the duration of the action the temperature is conditioned to let occur as little as possible.

Es ist bereits bekannt, zwecks Zerkleinerung von Kautschukbahnen o. dgl. diese zwi schen Riffelwalzen oder sonstigen Festhaltevorrichtungen stetig - einer schnell umlaufenden Stachel- oder Schleifwalze darzubieten. It is already known for the purpose of crushing rubber sheets o. The like. These between corrugated rollers or other holding devices steadily - present a fast rotating spiked or grinding roller.

Die Erfindung betrifft nun ein Verfahren zur Verbesserung des thermischen Abbaues von Kunstkautschuk in Fellform und besteht darin, die ganzen oder zerteilten Felle vor dem Abbau in an sich bekannter Weise zwischen eng besetzten Stachelwalzen zu zerkrümeln. Diese feine Zerkrümelung des Kunstkautsdiuks hat sich als eine außerordentlich günstige Beeinflussung des thermischen Abbaues erwiesen, da man auf diese Weise in geringerer Zeit und bei geringerer Temperatur günstigere Plastizitäten erreicht, als es beim normalen Abbau von Kunstkautschukfellen der Fall ist. Die durch die Bearbeitung gemäß der Erfindung erhaltenen Krümel zeichnen sich durch geringere Dichte aus, da sie bei dem Zerreißvorgang poröser werden. Hierin unterscheiden sich sehr wesentlich diese neuartigen Kunstkautschukkrümel von den bekannten Krümeln, die in dieser Form vom Erzeuger angeliefert werden. Der von früher her bekannte Kunstkautschuk in Krümelfotm ist dagegen nichts anderes als ein beim Herstellungsprozeß ausgeflockten und getrockneter Kunstkautschuk, der jedoch nicht die günstigen Eigenschaften der unmittelbar aus den Fellen kurz vor dem Abbau zerpflückten Krümel hat. The invention now relates to a method for improving the thermal Degradation of synthetic rubber in the form of fur and consists in whole or in pieces Before mining, skins in a manner known per se between densely packed spiked rollers to crumble. This fine crumbling of the artificial rubber has proven to be extraordinary favorable influence of the thermal degradation proved, since one in this way achieves more favorable plasticities in less time and at lower temperature, than is the case with the normal degradation of synthetic rubber heads. The through the Processing according to the invention obtained crumbs are characterized by lower Dense because they become more porous during the tearing process. This is where they differ very much these new synthetic rubber crumbs from the known crumbs, which are delivered in this form by the producer. The one known from earlier Artificial rubber in crumbs, on the other hand, is nothing other than a production process flocculated and dried synthetic rubber, which, however, does not have the favorable properties which has crumbs picked from the skins just before it is broken down.

Das Zerkrümeln wird vorzugsweise in der Art vorgenommen, daß man das Kunstkautschukfell mit Hilfe einer Festhaltevorrichtung, z. B. einer mit Stacheln versehenen Walze, und einer Mulde an eine schnell umlaufende größere Walze ununterbrochen heranbringt. Diese größere Walze ist ebenfalls mit Stacheln dicht besetzt. Das so festgehaltene und dicht an die größere Walze herangeführte, Fell wird durch die Stacheln nunmehr völlig in kleine Krümel zerrissen. The crumbling is preferably done in such a way that the synthetic rubber head with the help of a retaining device, e.g. B. one with spikes provided roller, and a trough on a fast rotating larger roller continuously brings up. This larger roller is also densely covered with spines. That so held and brought close to the larger roller, fur is through the Spines now completely torn into small crumbs.

Die Vorrichtung wird in der Zeichnung durch ein Ausführungsbeispiel veranschaulicht. Die zur Festhaltevorrichtung gehörende Walze a ist mit Stacheln versehen und führt das Kunstkautschukfell b über die Mulde c ununterbrochen an die größere Walze d dicht heran. An der Berührungsstelle e setzt der Zerreißprozeß des Felles ein, so daß die Krümel / nach unten entfallen. The device is shown in the drawing by an exemplary embodiment illustrated. The roller a belonging to the holding device is spiked provided and leads the synthetic rubber head b over the trough c continuously to the larger roller d close up. At the point of contact e, the breaking process of the Felles a so that the crumbs / down do not fall.

Claims (1)

PATENTANSPRUCH: Verfahren zum Verbessern des thermischen Abbaues von Kunstkautschuk in Fellform, dadurch gekennzeichnet, daß die ganzen oder zerteilten Felle vor dem Abbau in an sich bekannter Weise zwischen eng besetzten Stachelwalzea zerkrümelt werden. PATENT CLAIM: Process to improve thermal degradation of synthetic rubber in fur form, characterized in that the whole or divided Before mining, skins in a manner known per se between densely packed spiked whales to be crumbled.
DE1938C0054591 1938-12-06 1938-12-06 Process for improving the thermal degradation of synthetic rubber in the form of fur Expired DE699849C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1938C0054591 DE699849C (en) 1938-12-06 1938-12-06 Process for improving the thermal degradation of synthetic rubber in the form of fur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1938C0054591 DE699849C (en) 1938-12-06 1938-12-06 Process for improving the thermal degradation of synthetic rubber in the form of fur

Publications (1)

Publication Number Publication Date
DE699849C true DE699849C (en) 1940-12-07

Family

ID=7027985

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1938C0054591 Expired DE699849C (en) 1938-12-06 1938-12-06 Process for improving the thermal degradation of synthetic rubber in the form of fur

Country Status (1)

Country Link
DE (1) DE699849C (en)

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