DE3013723C2 - Process for reducing the surface tack of vulcanizable rubber articles - Google Patents
Process for reducing the surface tack of vulcanizable rubber articlesInfo
- Publication number
- DE3013723C2 DE3013723C2 DE19803013723 DE3013723A DE3013723C2 DE 3013723 C2 DE3013723 C2 DE 3013723C2 DE 19803013723 DE19803013723 DE 19803013723 DE 3013723 A DE3013723 A DE 3013723A DE 3013723 C2 DE3013723 C2 DE 3013723C2
- Authority
- DE
- Germany
- Prior art keywords
- reducing
- rubber articles
- vulcanizable rubber
- surface tack
- article
- 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
Links
- 238000000034 method Methods 0.000 title claims description 9
- 230000005855 radiation Effects 0.000 claims description 4
- 239000002344 surface layer Substances 0.000 claims description 3
- 241000931526 Acer campestre Species 0.000 claims 1
- 238000004073 vulcanization Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 201000005505 Measles Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/16—Surface shaping of articles, e.g. embossing; Apparatus therefor by wave energy or particle radiation, e.g. infrared heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0067—Using separating agents during or after moulding; Applying separating agents on preforms or articles, e.g. to prevent sticking to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/0005—Pretreatment of tyres or parts thereof, e.g. preheating, irradiation, precuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0833—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using actinic light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0838—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
Landscapes
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zum Vermindern der Oberflächenklebrigkeit vulkanisierbarer Kautschukartikel.The invention relates to a method of reducing the surface tack of vulcanizable ones Rubber articles.
Im Zuge der Herstellung von Kautschukartikeln der verschiedensten Art, beispielsweise Luftschläuchen für Fahrzeugreifen, Fördergurten, Kraftübertragungsriemen, Luftkissen, aufblasbaren Spielwaren, Bällen und anderen geschlossenen oder offenen Hohlkörpern u. dgl, erweist sich die vor der abschließenden Vulkanisierung stets gegebene Oberflächenklebrigkeit mit der daraus begründeten Neigung zum Haften aneinander und an anderen Gegenständen in ihrer Umgebung in den meisten Fällen als unerwünschte und lästige, zu Gegenmaßnahmen zwingende Eigenschaft Es ist bekannt, die Haftfreudigkeit durch Behandeln der Oberflächen mit Talkum oder anderen puderförmigen oder flüssigen Trennmitteln oder auch durch Vor- bzw. Anvulkanisieren der Kautschukmischung aufzuheben oder wenigstens ausreichend herabzusetzen. Wenn das erstrebte Ziel damit zwar auch erreicht wird, entstehen andererseits daraus noch wieder Nachteile, die schon seit langem den Wunsch nach grundlegenden Verbesserungen aufkommen ließen. So führt beispielsweise die Verwendung pulveriger oder nüssiger Trennmittel zu mehr oder weniger starken Verschmutzungen der Fertigungseinrichtungen selbst wie auch der näheren Umgebung, und sie beeinträchtigt darüber hinaus das optische Erscheinungsbild der fertigen Artikel, während das Vorvulkanisieren mit Rückschicht auf nachfolgende Bearbeitungs- oder Behandlungsvorgänge, Herstellen von Verbindungen od. dgl., oft gar nicht ausgeübt werden kann.In the course of the production of rubber articles of various kinds, for example air hoses for Vehicle tires, conveyor belts, power transmission belts, air cushions, inflatable toys, and balls other closed or open hollow bodies and the like, proves before the final Vulcanization always given surface tack with the resulting tendency to stick on each other and on other objects in their environment in most cases as undesirable and annoying, imperative to countermeasures property It is known to the liability by handling the Surfaces with talc or other powdery or liquid release agents or also by means of preliminary or Cancel the vulcanization of the rubber mixture or at least reduce it sufficiently. If that Although the desired goal is achieved in this way, there are, on the other hand, disadvantages that already arise long since the desire for fundamental improvements has arisen. For example, the Use of powdery or nutty release agents to more or less severe soiling of the Manufacturing facilities themselves as well as the immediate vicinity, and they also affect that visual appearance of the finished article during the pre-vulcanization with backing layer on subsequent Processing or treatment processes, making connections or the like, often not performed at all can be.
Der Erfindung liegt demgemäß als Aufgabe ein neuartiges Verfahren zugrunde, mit dem sich die Oberflächenklebrigkeit vulkanisierbarer Kautschukartikel ohne Zuhilfenahme besonderer Trennmittel und ohne die mit einem Vor- oder Anvulkanisieren verbundenen tiefgreifenden Strukturveränderungen angemessen vermindern läßt. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Artikel kurzzeitig bis zum Verkohlen ihrer äußersten Oberflächenschicht der Einwirkung einer energiereichen Lichtstrahlung von Gasentladungslampen, Lasern oder Masern ausgesetzt werden.The invention is accordingly based on a novel method with which the Surface tackiness of vulcanizable rubber articles without the aid of special release agents and without the profound structural changes associated with pre-vulcanization or vulcanization can decrease. This object is achieved according to the invention in that the article briefly until charring of their outermost surface layer under the action of an energetic Light radiation from gas discharge lamps, lasers or measles.
Die Einwirkung einer solchen Bestrahlung hat ein thermisches Zersetzen nur einer extrem dünnen Außenschicht mit dem Abdampfen flüchtiger Mischungsbestandteile zur Folge, wodurch im Endeffekt die Oberfläche im »Griff« trocken wird und jede Neigung zum Anhaften verliert. Im Gegensatz zu dem bekannten Vernetzen elastomerer Werkstoffe mit Hilfe von Korpuskular-, Röntgen- oder Gammastrahlen vermeidet die Erfindung von vornherein eine das Gefüge der Artikel selbst verändernde Tiefenwirkung. Vielmehr bleibt die nach dem neuartigen Verfahren verwendete besondere Art elektromagnetischer Strahlung nur auf die äußerste Oberflächenschicht — es kommen Schichtdicken in einer Größenordnung von wenigen My in Frage — beschränkt, wo sie schon vollständig absorbiert wird. Die tatsächliche Eindringtiefe hängt in erster Linie von dem Rußanteil der Mischung ab. Die Artikel werden infolgedessen über praktisch ihre gesamte Querschnittsdicke in ihrem ursprünglichen Rohzustand erhalten und können ohne Einschränkungen und Qualitätseinbußen der Weiterverarbeitung zugeführt werden.The action of such irradiation has only an extremely thin thermal decomposition Outer layer with the evaporation of volatile mixture components result, which in the end effect the surface becomes dry in the "handle" and loses any tendency to stick. In contrast to that known cross-linking of elastomeric materials with the help of corpuscular, X-ray or gamma rays the invention avoids a depth effect which would change the structure of the article itself from the outset. Rather, the special type of electromagnetic radiation used according to the novel process remains only on the outermost surface layer - there are layer thicknesses in the order of magnitude of few My in question - limited where it is already completely absorbed. The actual depth of penetration depends primarily on the amount of soot in the mixture. As a result, the articles are over practically their entire cross-sectional thickness is preserved in its original raw state and can be used without Restrictions and quality losses are passed on to further processing.
Auf die Verwendung von Talkum und anderen Trennmitteln kann gänzlich verzichtet und der Betriebsablauf daher sauberer und weniger aufwendig gestaltet werden.The use of talc and other release agents can be dispensed with entirely and the operational process is therefore cleaner and less complex will.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803013723 DE3013723C2 (en) | 1980-04-10 | 1980-04-10 | Process for reducing the surface tack of vulcanizable rubber articles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803013723 DE3013723C2 (en) | 1980-04-10 | 1980-04-10 | Process for reducing the surface tack of vulcanizable rubber articles |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3013723A1 DE3013723A1 (en) | 1981-10-15 |
DE3013723C2 true DE3013723C2 (en) | 1983-12-01 |
Family
ID=6099618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19803013723 Expired DE3013723C2 (en) | 1980-04-10 | 1980-04-10 | Process for reducing the surface tack of vulcanizable rubber articles |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3013723C2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5213723A (en) * | 1985-06-03 | 1993-05-25 | Sumitomo Chemical Co., Ltd. | Process for producing rubber products |
JPH0713147B2 (en) * | 1985-06-03 | 1995-02-15 | 住友化学工業株式会社 | Rubber product manufacturing method |
DE102013102304A1 (en) * | 2013-03-08 | 2014-09-11 | Continental Reifen Deutschland Gmbh | Method for reducing the tackiness of unvulcanized rubber strips with reinforcements |
-
1980
- 1980-04-10 DE DE19803013723 patent/DE3013723C2/en not_active Expired
Non-Patent Citations (1)
Title |
---|
NICHTS-ERMITTELT |
Also Published As
Publication number | Publication date |
---|---|
DE3013723A1 (en) | 1981-10-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: CONTINENTAL AKTIENGESELLSCHAFT, 3000 HANNOVER, DE |
|
8339 | Ceased/non-payment of the annual fee |