CPC B29C 48/345 (2019.02) [B29C 48/05 (2019.02); D01D 4/025 (2013.01); D01D 5/0985 (2013.01); D04H 1/565 (2013.01); B29L 2031/726 (2013.01)] | 15 Claims |
1. An apparatus for making filaments, the apparatus comprising:
a nozzle having
a face extending in a longitudinal direction and transversely thereto in a transverse direction and
an array of melt openings and compressed-air openings on the face in a plurality of longitudinally extending rows and a plurality of transversely extending rows, between 12% and 45% of the melt and compressed-air openings being melt openings and the balance being compressed-air openings; and
means for supplying a polymer melt to the melt openings to extrude the polymer melt downstream from the melt openings as polymer filaments and for supplying compressed air to the compressed-air openings to form air jets issuing downstream from the compressed-air openings between the polymer filaments.
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15. An apparatus for making filaments, the apparatus comprising:
a nozzle having a face extending in a longitudinal direction and transversely thereto in a transverse direction, the nozzle having melt openings and compressed-air openings on the face in a plurality of longitudinally extending rows and a plurality of transversely extending rows, all of the openings of alternate longitudinal rows being compressed-air openings and at least some of the openings of the longitudinal rows between the longitudinal rows wholly of compressed-air openings being melt openings, the melt openings in each of the longitudinal rows between the longitudinal rows wholly of compressed-air openings being separated longitudinally from one another by compressed-air openings; and
means for supplying a polymer melt to the nozzle openings to extrude the polymer melt downstream from the melt openings as polymer filaments and for supplying compressed air to the compressed-air openings to form air jets issuing downstream from the compressed-air openings between the polymer filaments.
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