Monolithic belts with ethylene-.alpha.-olefin copolymers

Details Monolithic belts with ethylene-.alpha.-olefin copolymers Monolithic belts with ethylene-.alpha.-olefin copolymers

F - Mech Eng,Light,Heat,Weapons

16

G

F16G 1/14 (2006.01) C08F 210/16 (2006.01) F16G 5/12 (2006.01) F16G 9/00 (2006.01)

Patent

CA 2449385

The invention relates to monolithic belts (i.e. without a material insert), especially monolithic conveyer belts and drive belts, consisting of a thermoplastic material containing a copolymer having a weight average Mw to number average Mn ratio of between 5.0: 1 and 1.5: 1. Said belts exhibit increased creep resistance while having significantly reduced material costs. The copolymer can especially be produced by means of a metallocene single-site catalyst.

La présente invention concerne des courroies monolithiques (c'est-à-dire sans pli de tissu), notamment des courroies de transport et des courroies de transmission monolithiques. Ces courroies monolithiques sont constituées d'une matière thermoplastique qui contient un copolymère présentant un rapport de la moyenne en poids M¿w? sur la moyenne en nombre M¿n? qui va de 5,0 : 1 à 1,5 : 1. Lesdites courroies monolithiques présentent une résistance au fluage élevée et les coûts des matériaux sont fortement réduits. Le copolymère peut notamment être produit au moyen d'un catalyseur à site unique (single site) métallocène.

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