Drive Belts Including Foamed Undercord Layers and Methods of Manufacturing The Same
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United States of America Patent
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Issued Date -
Mar 7, 2024
app pub date -
Dec 28, 2021
filing date -
Dec 28, 2020
priority date (Note) -
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Abstract
A drive belt includes a foamed undercord layer having void spaces located throughout the foamed undercord layer. The void spaces extend from a backing layer of the undercord layer to an exterior surface of the backing layer, and may include some void spaces at the exterior surface that are open to the external environment. The foamed undercord layer may exhibit a 20% reduction in specific gravity as compared to an unfoamed version of the undercord layer. The manufacturing process for making the foamed undercord layer can include incorporating foaming agent in the undercord layer such that the undercord layer both foams and cures when heat and pressure are applied to the undercord layer. The foamed drive belt incorporating the foamed undercord layer may exhibit reduced bending stiffness and improved energy efficiency.
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