Abstract: Certain aspects of the present disclosure provide a surgical cassette configured to engage a first plurality of rollers of a first roller head. The cassette comprises a face coupled to a first substrate, the face being at a first angle with respect to the first roller head's axis of rotation and a wall of first substrate being at a second angle with respect to the axis of rotation, wherein the first angle is different from the second angle. The cassette also comprises a first sheet positioned on the wall's surface, wherein the first sheet and the wall form first one or more pump segments configured to engage the first plurality of rollers in a position where force applied by each one of the first plurality of rollers on the first one or more pump segments has a direction that is not parallel to the first roller head's axis of rotation.

Abstract: A composition for making polyamide fiber comprises: (a) about 85 to about 99.9% by weight, preferably about 90 to about 99.5% by weight, more preferably about 95 to about 99.5%, such as about 95 to about 99% by weight of a polyamide, based on the total weight of the composition; (b) about 0.1% to about 15% by weight, preferably about 0.1% to about 10% by weight, more preferably about 0.5% to about 5%, such as about 1 to about 5% by weight of one or more thermoplastic polymers, based on the total weight of the composition, wherein the thermoplastic polymer in the composition is miscible with component (a). A process for making a polyamide fiber uses the composition of the invention.

Abstract: A composition for making polyamide fiber comprises: (a) about 85 to about 99.9% by weight, preferably about 90 to about 99.5% by weight, more preferably about 95 to about 99.5%, such as about 95 to about 99% by weight of a polyamide, based on the total weight of the composition; (b) about 0.1% to about 15% by weight, preferably about 0.1% to about 10% by weight, more preferably about 0.5% to about 5%, such as about 1 to about 5% by weight of one or more thermoplastic polymers, based on the total weight of the composition, wherein the thermoplastic polymer in the composition is miscible with component (a). A process for making a polyamide fiber uses the composition of the invention.