Monofilaments with split ends

Details Monofilaments with split ends Monofilaments with split ends

A - Human Necessities

46

D

A46D 1/00 (2006.01) A46D 1/05 (2006.01) A46D 1/06 (2006.01) B29C 47/30 (2006.01) D01D 5/08 (2006.01) D01F 6/58 (2006.01) A46B 9/04 (2006.01)

Patent

CA 2560512

Monofilaments with split ends. The monofilaments can be used to form toothbrush bristles having flagged or feathered tips. Each of the monofilaments has a plurality of internal fusion lines and at least four voids, wherein the voids comprise between 5 and 20 % of the cross-sectional area of the monofilaments. Preferably, the monofilaments each have a diameter in a range of 0.0025 to 0.012 inches, and have a hexalocular or an octalocular configuration. The monofilaments are manufactured by extruding a plurality of thermoplastic polymeric streams, rotating a plurality of cutting blades above 1000 rpm, and placing a plurality of cutting blades in contact with end portions of the plurality of thermoplastic polymeric streams to form split ends.

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