US 12,404,626 B2
Drive belt, in particular toothed belt, having improved properties and method for producing same
Daniel Pattie Gibson, Dumfries (GB)
Assigned to Arntz Beteiligungs GmbH & Co. KG, Höxter (DE)
Filed by Arntz Beteiligungs GmbH & Co. KG, Höxter (DE)
Filed on Apr. 1, 2021, as Appl. No. 17/220,247.
Claims priority of application No. 10 2020 109 429.9 (DE), filed on Apr. 3, 2020.
Prior Publication US 2021/0316521 A1, Oct. 14, 2021
Int. Cl. D06M 10/04 (2006.01); B29C 70/00 (2006.01); B29D 29/08 (2006.01); D06M 15/568 (2006.01); D06M 23/00 (2006.01)
CPC D06M 10/04 (2013.01) [B29C 70/00 (2013.01); B29D 29/08 (2013.01); D06M 15/568 (2013.01); D06M 23/005 (2013.01); D10B 2101/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for producing a drive belt having a belt body composed of elastic material and tension members with tensile strands, wherein at least one tension member with the tensile strands of the tension members is formed from a multiplicity of carbon fibers which are twisted together to form a twisted carbon cord, comprising:
treating the twisted carbon cord with a liquid isocyanate solution not containing other reaction partners forming the elastic material to produce a soaked, twisted carbon cord;
optionally drying and optionally heat-treating the twisted carbon cord after soaking with liquid isocyanate solution;
then winding the soaked, twisted carbon cord in a form of tensile strands of the at least one tension member around a drum;
then introducing a solution of reaction partners forming the elastic material of the belt body to the soaked, twisted carbon cord wound on the drum for formation of the belt body composed of elastic material;
then forming the drive belt under the action of pressure and/or temperature on the reaction partners and the soaked, twisted carbon cord wound on the drum, wherein the belt body of the drive belt comprises the tension members with the at least one tension member that is composed of the twisted carbon cord, wherein the elastic material of the belt body at least partially encloses the tension members;
wherein the soaked, twisted carbon cord is not subjected to curing before being brought into contact with the reaction partners for formation of the belt body and after winding the soaked, twisted carbon cord around the drum, wherein no coating or soaking of the soaked, twisted carbon cord other than treating the twisted carbon cord with the liquid isocyanate solution, is carried out before introduction of the solution of reaction partners for formation of the belt body composed of elastic material, and wherein the reaction partners for formation of the belt body composed of elastic material are introduced as a prepolymer with a curing agent, wherein the belt body comprises belt teeth for formation of a toothed belt.