Fiber tows with a heat-activated sizing
Assignee3M Innovative Properties Company
InventorsAaron R. Beaber, Kari A. McGee, Kimberly C. M. Schultz, Erica M. McCready, Aric W. Ross, Zachary A. Danielson
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Abstract
Fiber tows including a heat-activatable sizing are described. The sizing compositions have a first modulus at 25° C. of at least 150 megapascals (MPa) and no greater than 400 MPa; and a second modulus of 100,000 pascals (Pa) at a temperature of no greater than 160° C. Methods of preparing articles from such sized fiber tows and the articles comprising such sized fiber tows, including unidirectional and bidirectional constructions are also described.
Claims23
A sized tow comprising a tow of ceramic fibers selected from the group consisting of oxide-based ceramic fibers and non-oxide based ceramic fibers that are based on carbides and nitrides, including oxynitrides, oxycarbides and oxycarbonitrides, and a sizing composition comprising a polymer covering at least a portion of the tow, wherein, as measured according to a Modulus Procedure, the sizing composition has a first modulus at 25° C. of at least 150 megapascals (MPa) and no greater than 350 MPa;
- and a second modulus of 100,000 pascals (Pa) at a temperature of no greater than 160° C., and wherein a coat weight of the sizing composition is between 2 and 10 weight percent, inclusive, based on the total weight of the sized tow.
Dependencies are inferred from the claim text.