CARBON FIBERS HAVING IMPROVED STRENGTH AND MODULUS AND AN ASSOCIATED METHOD AND APPARATUS FOR PREPARING SAME
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United States of America Patent
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Issued Date -
Sep 12, 2024
app pub date -
Aug 19, 2022
filing date -
Aug 20, 2021
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The invention is directed to carbon fibers having high tensile strength. The invention also provides a method and apparatus for making the carbon fibers. The method comprises advancing a precursor fiber through a plurality of passes through an oxidation oven, where stretching during the initial passes is minimized or eliminated entirely, or made negative, followed by controlled stretching over a series of passes, using rollers of increasing speed.
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