Drive belt, in particular toothed belt, having improved properties and method for producing same
AssigneeArntz Beteiligungs GmbH & Co. KG
InventorDaniel Pattie Gibson
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Abstract
In a first aspect, the present invention relates to a method for producing a drive belt, in particular a toothed belt, having a belt body composed of elastic material and a tension member with tensile strands composed of carbon cord. In this case, these carbon cords, in the form of twisted carbon cords, are soaked with a liquid isocyanate solution before they are used as tension members for the drive belts. In a further aspect, a drive belt which can be obtained in this way is provided. This drive belt is in particular a high performance belt, such as a high performance toothed belt, having improved belt running times and adhesion properties of the carbon cord to the belt body.
Claims18
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.
Dependencies are inferred from the claim text.