METHOD OF PRODUCING SIZING AGENT-APPLIED CARBON FIBER BUNDLES
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United States of America Patent
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Issued Date -
Apr 23, 2020
app pub date -
Jun 4, 2018
filing date -
Jul 10, 2017
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Abstract
A method of producing sizing agent-applied carbon fiber bundles includes a sizing agent application process of immersing a plurality of carbon fiber bundles running side by side in a sizing agent bath, followed by a dry process performed to obtain sizing agent-applied carbon fiber bundles and, to address issues of wrapping of a carbon fiber bundle caused by sticking of a sizing agent solution to a guide roller, the first guide roller for the carbon fiber bundles after being immersed in the sizing agent bath and coming out of a liquid surface of the sizing agent bath is set to have a surface adhesive force of 0.2 N/cm2 or less.
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