EXPANSION HELD PREPEG COMPOSITE
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United States of America Patent
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Issued Date -
Sep 8, 2022
app pub date -
Jul 29, 2020
filing date -
Jul 31, 2019
priority date (Note) -
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Abstract
In the expansion held prepeg composite (100) disclosed herein, using a flexible and expandable tubular core (101), one or more set of fibers are linearly placed over the circumference of the tubular core (101); and one or more set of fibers with predetermined tensions are wound over the linear fibers to create an expansion held prepeg composite (100). At least one of the set of fibers is precoated with resin. The tension of wrapping of each subsequent set of fibers is higher than its precedent wound layer. A bladder tube is inserted into the tubular core (101) of the expansion held prepeg composite 100. The expansion held prepeg composite (100) is a held in the desired three dimensional shape. Compressed air is introduced into the bladder tube and cured. At least one of the sets of fiber must be impregnated with resin.
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