Melt spinning process

Details Melt spinning process Melt spinning process

D - Textiles, Paper

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D01D 4/02 (2006.01) A23G 3/10 (2006.01) D01D 5/08 (2006.01) D01D 5/22 (2006.01) D01D 5/32 (2006.01)

Patent

CA 1183313

ABSTRACT OF THE DISCLOSURE A spinneret comprising a plurality of combined orifices having corresponding parts in corresponding arrangement, said parts and arrangement including two or more individual capillaries disposed in angular or parallel relationship, separated by a land and arranged to spin a variable denier filament, the improvement comprising, said combined orifices having different nominal dimensions such that either, a) corresponding capillary lengths differ by at least 0.0007 inch; b) corresponding capillary transverse dimensions differ by at least 0.0002 inch; c) the included angles between the correspond- ing capillaries differ by at least 1 degree; or d) the land widths between corresponding capillaries differ by at least 0.0006 inch, said different nominal dimensions of said combined orifices being selected to reduce doff-to-doff property variations of yarns spun from said spinneret. Yarns spun from such spinnerets have less doff-to-doff average standard deviation of yarn bulk since the spinneret has a plurality of combined orifices having different nominal dimension, rather than all combined orifices having identical nominal dimensions.

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