D - Textiles – Paper – 01 – D
Patent
D - Textiles, Paper
01
D
18/557, 18/630
D01D 5/08 (2006.01) D01D 5/088 (2006.01) D01F 6/06 (2006.01)
Patent
CA 1328964
INVENTOR: Paolo BERT INVENTION: MELT-SPINNING APPARATUS AND METHOD ABSTRACT A melt-spinning apparatus comprises means for feeding a molt- en polymer composition from at least one extruder to a mult- iplicity of spinning orifices provided by a plurality of spinnerets for producing a multiplicity of discrete continu- ous extrudates emerging from the orifices in a generally downward direction; quenching means for cooling the extrud- ates and for solidifying them to form a multiplicity of dis- crete continuous filaments; take-up and stretching means provided downstream from the orifices for contacting and stretching the filaments; the quenching means include means for directing at least one stream of a cooling gas having a quenching temperature onto a portion, at least, of the ex- trudates; the orifices or spinnerets are arranged to form an annular array and a portion, at least, of the quenching means is provided to direct the cooling gas stream in a substanti- ally radial manner onto the extrudates that emerge from the orifices in the annular array. The method of the invention comprises forming at least one stream consisting of a multiplicity of continuous pre-fila- ment extrudates in an essentially annular or cylindric array and quenching the extrudates that form the annular array in an essentially radial manner with a cooling gas, preferably from within the array. Apparatus and method are of particular advantage for melt-spinning of polypropylene.
614579
Bacchini Alberto
Filteco S.p.a.
Ridout & Maybee Llp
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