Contitech Antriebssysteme Gmbh

Contitech Deutschland Gmbh

Henning Kanzow

Reinhard Teves

Claus-Lueder Mahnken

Claus-Lüder Mahnken

Thomas Baltes

Reinhold Moses

Stephanie Kautz

Antonius Dikmans

Siegmar Gebhardt

Felicitas Broianigo

Heiko Sattler

Michael Well

Tim Fiss

Marko Schleicher

Andreas Fleck

Manfred Bonkowski

Tobias Nonnast

Mario Pastuovic

Axel Unruh

Roman Gaska

Markus Obert

Jan Michalk

Jan Finzelberg

Timo Sebastian Kasak

Christian Greiner

Antoine Ishak

Rene Sandmann

Guevenc Sener

Hermann Schulte

Mark-Enno Detke

Jörg Tams

A V-ribbed belt having an elastic main body constructed from at least one rubber mixture including an outer ply as a belt backing and a substructure having a ribbed force-transmitting side. To improve friction and optimize service life the V-ribbed belt has a coating made of a knitted fabric on its force-transmitting side, in which the average basis weight of the textile before vulcanization is between 140 and 190 g/m.

V-ribbed belt

The present invention relates to elastomer toothed belts comprising a fabric spanning the teeth of the toothed belt, wherein the elastomer mixture forming the teeth contains a crosslinked ethylene-propylene rubber (EPM) and/or a crosslinked ethylene-propylene terpolymer rubber (EPDM) accounting for at least 70% by weight of the elastomer mixture based on the polymer proportion and wherein an interlayer is arranged between the fabric and the elastomer mixture forming the teeth which contains at least 70% by weight of hydrogenated acrylonitrile-butadiene rubber (HNBR) based on the polymer proportion of the interlayer. Such elastomer toothed belts are halogen-free and feature improved durability and good low-temperature stability properties. The present invention further relates to processes for producing such elastomer toothed belts and to the use of a layer of hydrogenated acrylonitrile-butadiene rubber (HNBR) in such toothed belts to increase service life, to improve low-temperature stability and to improve the adhesion between the teeth and the fabric.

High-performance toothed belt made of EPDM

The present invention relates to an article having an elastic main body based on at least one thermoplastic elastomer or based on a vulcanizate and having an article surface that is provided with a textile overlay in the form of a plated knitted fabric, wherein the textile overlay is composed of at least two types of yarn that alternate in the individual knitted courses at regular intervals.

Article with textile overlay plated in repeating alternation

The invention relates to a drive belt () having a main body into which one or more tension strands () composed of para-aramid in cord construction are embedded, wherein each tension strand () has twisted plies each formed from at least one twisted yarn, and wherein the turning direction of the respective ply (first twist) is the opposite of the turning direction of the cord (final twist). It is a feature of the invention that the tension strands () each have at least four plies, wherein the twist factor TMof the plies (first twist) is between 4.5 and 5.4, and the twist factor TMof the cord (final twist) is between 2.7 and 3.8, and the ratio of the twist factor of the plies to the twist factor of the cord (TM/TM) is between 1.3 and 1.5.

Drive belt, use of a drive belt of this type as a V-ribbed belt, and production method

A method for producing a sheet-like composite fabric material, in particular a rubberized fabric or a fabric provided with a polymer preparation, for covering drive belts, the composite fabric material comprising a textile integrated in a matrix of elastomeric material, preferably at least one fabric layer integrated in a rubber matrix, the textile or the fabric layer and the elastomeric material being introduced into a gap between a band and a cylindrical molding wheel and molded to form a composite material between the band and the molding wheel at a temperature below the vulcanization temperature, the band looping around the molding wheel at a looping angle under pressure. Likewise disclosed is a drive belt with a covering of composite material produced according to the invention.

Method for producing a composite fabric material and drive belt covered with composite fabric material

A drive belt having a main body formed of an elastomeric material, preferably a v-belt or v-ribbed belt, the drive belt including a top layer as belt backing, a power transmission zone having two or more tensile strands as strength members, and also a substructure optionally provided with some profiling preferably having a v-shape or a v-rib profile. The strength members are formed of cords made of mutually twisted plies (final twist), the plies being in turn twisted out of individual yarns (first twist). The cords consist essentially of polyethylene terephthalate (PET) and of two plies, the number of turns introduced into the plies twisted into a cord (final twist) and the number of turns introduced into the yarns twisted into a ply (first twist) differing by not more than 10 turns per meter (t/m).

Drive belt

A flexurally elastic drive belt () has a cover layer (), a reinforcement layer () formed of individual cords () and a substructure (). The substructure can include ribs () and grooves (). The drive belt is further provided with a textile overlay on the working side () thereof that is susceptible to wear. The textile overlay (; section B of FIG.) of the drive belt () combines a very durable resistance to wear and a noise attenuation especially for wet noises. This is achieved in that the overlay has, in a state in advance of fabrication and vulcanization, an elongation at tear of at least 30% in the longitudinal direction and of at least 100% in the transverse direction and is made of a textile material including staple fibers in a proportion in terms of quantity of at least 30% by weight.

Flexurally elastic drive belt

The invention relates to an article including an elastic main body on the basis of a vulcanized rubber () having an article surface that is susceptible to wear, which is provided with a textile layer. The textile layer, particularly a woven fabric () or knitted fabric, has a mesh design that allows the vulcanized rubber () to penetrate to the textile surface to form a textile-vulcanized rubber hybrid system (), wherein the vulcanized rubber portion on the textile surface can be controlled by means of the stitch number, stitch width and the thread design of the textile layer. The article is in particular a drive belt and in connection with the primary intended use, a method for making a drive belt is provided.

Article, particularly drive belt, having a textile layer and method for producing a drive belt

An article comprises an elastic main body on the basis of at least one thermoplastic elastomer or on the basis of a vulcanizate, with an article surface that is provided with a textile covering, wherein the textile covering is a plated knit fabric. The article is, in particular, a drive belt, preferably a V-ribbed belt.

Article, in particular drive belt, comprising a textile covering

An article has an elastic main element based on a vulcanizate having a wear-susceptible article surface. The article is primarily a drive belt () having a top layer () as the belt rear and a substructure () having a force transmission zone (), wherein the force transmission zone and/or the top layer is/are supplied with a textile overlay (), wherein the textile overlay is in turn additionally prepared with a plastic. The plastic is a bonding agent that is arranged between the main body and the textile overlay (), wherein the plastic is supplied such that it melts during vulcanization and penetrates into the textile overlay while bonding, connected to a permanent adhesive bond between main body and textile overlay. A cotton fabric is used as the textile overlay (), for example. The plastic is in the form of a film, for example, particularly in the form of a PE film. The primary purpose of use is the V-belt, ribbed V-belt () and the toothed belt.

Elastic articles, particularly drive belts, having a textile overlay and a bonding agent made from meltable plastic

V-ribbed belts are formed by thermoplastic shaping and contain ribs that run at least on a first side in a longitudinal direction of the V-ribbed belt. The first side contains a layer composed of a textile warp-knit fabric made up of two different yarns. The warp-knit fabric is constructed from a first yarn composed of filaments with a module of more than 5N/1000 dtex, and a second yarn composed of filaments with a module of less than 2 cN/1000 dtex, both based on 5% extension. The first and second yarns form a coherent network and the yarns do not twine around one another. V-ribbed belts can be formed using an elastic warp-knit fabric, whose extension is based on the construction of the knitted fabrics. The belts maintain better noise reduction both in the new state and after a relatively long service life.

V-ribbed belt with improved noise properties

The invention is directed to a drive belt of rubber or rubber-like plastic having a surface protection () which includes polyamide-containing textile reinforcement and/or polyester-containing textile reinforcement. On the outer side, a surface coating () of a friction-reducing material in a matrix of at least one elastic addition polymer is provided. For improved heat resistance with good protection against wear, the elastic addition polymer has less than 2% by weight based on the polymer of structural components &#x2014;O&#x2014;CR&#x2014;O&#x2014; with x=1-3 and y=0-6. The R in a structural component can be the same or can be different and is selected from hydrogen and/or carbon-containing groups.

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Hannover, Germany

Henning Kanzow