BELT HAVING A TEXTILE OVERLAY
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Dec 17, 2012
filing date -
Dec 20, 2011
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Abstract
The invention relates to a power transmission belt, having a base of cast polyurethane (30) and a power transmission zone (3) formed thereon and comprising, at least in contact with the power transmission zone (3), an abrasion-proof textile overlay (1) having an inner impregnation that acts to reduce abrasion by fixing the textile fibres and constitutes a barrier coat for the polyurethane in order to prevent same from passing through the textile with the associated increase in abrasion. For the impregnation, a thermoplastic material (22) having a melting point not below 80° C. is located in the interior of the textile overlay (1) in addition to the textile material and substantially completely fills the interstices between the textile threads (16) or fibres in a central plane (15) of the textile viewed across the area, wherein the polyurethane (30) does not completely penetrate the base of the textile overlay (1), limited by the thermoplastic material (22). For the impregnation, it copolyamide film (2) can be fused into the textile in a pre-treatment step.
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