Power Transmission Belt Reactive Diluent Coating
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Solution Overview
Problem
Existing power transmission belts with fabric coatings face challenges in achieving controlled depth of penetration and optimal wear resistance due to high viscosity and sensitivity of coating compositions, leading to poor processability and inadequate abrasion resistance.
Innovation Solution
Incorporating a reactive diluent, such as methacrylates, acrylates, or vinyl ethers, into the textile coating of the power transmission zone and cover layer, allowing for adjustable hardness and improved flowability, enabling deeper penetration and enhanced abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastomer mixtures are highly filled with particulate fluoropolymers to improve wear resistance, then abrasion resistance is improved, but viscosity increases making processing difficult
Solution Approach 1:
The patent uses silane-modified fluoropolymer particles that undergo chemical transformation during vulcanization. The particles change from a state suitable for processing (modified fluoropolymer) to a final state providing wear resistance (crosslinked fluoropolymer network), resolving the contradiction between processability and wear resistance
Solution Approach 2:
The invention creates a composite coating system combining silane-modified fluoropolymer particles with an elastomeric matrix containing silane coupling agents. This composite structure allows the fluoropolymer to be processed in a modified state while developing wear-resistant properties through in-situ crosslinking
2Reliability
If coating composition hardness is increased to improve wear resistance, then abrasion resistance is improved, but flowability decreases reducing penetration depth
Solution Approach 1:
The coating is applied in a pre-vulcanization state with lower hardness and better flowability, allowing deep penetration into the fabric structure before the vulcanization process transforms it into a hard, wear-resistant final state
Solution Approach 2:
The coating material undergoes a phase transition during vulcanization from a processable state (silane-modified fluoropolymer in elastomeric matrix) to a functional state (crosslinked fluoropolymer network), enabling it to achieve both good flowability during application and high hardness in the final product
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The use of reactive diluents in the textile coating results in a power transmission belt with improved abrasion resistance and longevity, maintaining good flowability even at higher hardness levels, ensuring effective penetration and adhesion to the textile layer.
Implementation Method 1
the textile covering of the force transmission zone and/or the cover layer is provided with at least one coating which contains at least one reactive diluent according to DIN 55945:2007-03
Implementation Method 2
the depth of penetration of the coating into the textile layer should therefore be controllable over a wide range
Implementation Method 3
Fabric coatings on power transmission belts generally protect against wear. In the case of timing belts in particular, this protects the tooth tissue, which is subject to particularly mechanical stress, from wear
Data Source
Figure 1~2
AI summary
The invention relates to a power transmission belt (10, 20) with an elastic base body (17), comprising a cover layer (11) as the belt back and a substructure (13) with a power transmission zone (14), wherein the power transmission zone (14) and/or the cover layer (11) is provided with at least one textile covering (15, 16) and which is characterized in that the textile covering (15, 16) of the power transmission zone (14) and/or the cover layer (11) is provided with at least one coating which contains at least one reactive diluent according to DIN 55945:2007-03.