Methods for modification of aramid fibers
OwnerNihal Kanbargi, Alan J. Lesser +3inventors
InventorsNihal Kanbargi, Alan J. Lesser, Wei Zhao, Sheel P. Agarwal, Mindaugas Rackaitis
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Abstract
Methods are described for treatment of aramid fibers to modify the surface of the fibers. The treated fibers have improved adhesion to elastomer materials as compared to untreated fibers. Modification methods include irradiating the fibers, compressing and straining the fibers under a constant pull force and immersing the fibers in a coupling agent fluid. The treated fibers can be used with elastomers and provide reinforcement elements in products such as tires.
Claims20
A method for modifying the surface of an aramid fiber, the method comprising:
- a. subjecting the aramid fiber to a constant tensile force in the range of 0.5 N to 3 N;
- b. bending the aramid fiber two or more times at an angle of greater than 90 degrees to form notches on the surface of the aramid fiber;
- c. releasing the aramid fiber from the tensile force;
- and d. the aramid fiber being twisted at a twist rate of in the range of 10 to 200 turns per meter after step (c).
A method for modifying the surface of an aramid fiber, the method comprising:
- a. subjecting the aramid fiber to a constant tensile force in the range of 0.5 N to less than 2 N;
- b. bending the aramid fiber two or more times at an angle of greater than 90 degrees to form notches on the surface of the aramid fiber;
- c. releasing the aramid fiber from the tensile force;
- and
- d. the aramid fiber being twisted at a twist rate of in the range of 10 to 200 turns per meter after step (c).
Dependencies are inferred from the claim text.