Back to results
US 2021/0276280 A1Published application
High strength thermoplastic composites
AssigneeE. I. Du Pont de Nemours and Company
InventorsBryan Benedict Sauer, Zachary R. Dillworth, Mark Gary Weinberg, Jacob G. Dickinson
Life of this patent
Estimating the term…
Abstract
Voided carbon fiber tapes comprising from 18K to 125K carbon fibers, a thermoplastic resin having a viscosity of about 10 to about 150 Pa·s, at least 3 void areas, a fiber fraction ranging from about 35 to 70 percent, a void volume ranging from about 2 to about 50 percent, and at least 10 percent wetted carbon fibers may be used to prepare consolidated thermoplastic composites which exhibit flexural strengths greater than or equal to 75 percent of the theoretical flexural strength.
Claims24
A voided tape comprising:
- a) from 18K to 125K carbon fibers,
- b) a thermoplastic resin having a viscosity of about 10 to about 150 Pa·s when measured using a capillary viscometer at a temperature 30° C. above the thermoplastic resin melting point and at a shear rate of 300 s−1,
- c) at least 3 void areas,
- d) a fiber fraction ranging from about 35 to 70 percent,
- e) a void volume ranging from about 2 to about 50 percent when measured by a buoyancy method, and
- f) at least 10 percent wetted carbon fibers;
- wherein:
- the voided tape width ranges from about (0.00019 mm×the number of carbon fibers in (a)) to about (0.0016 mm×the number of carbon fibers in (a)),
- the voided tape width:height ratio ranges from about 10 to 1000.
6 more elements
Dependencies are inferred from the claim text.