| 主权项 |
1. An apparatus for producing a non-woven web comprising:
a) a die block having a cavity and an inlet connected to said cavity which conveys a molten material therethrough, said die block also having a gas passage formed therethrough for conveying pressurized gas, said gas passage having an inside diameter; b) an insert positioned in said gas passage having an inside diameter and an outside diameter, a major portion of said outside diameter being smaller than said inside diameter of said gas passage to form a gas chamber therebetween; b) a spinnerette body secured to said die block having a gas chamber, and a gas passageway connecting said gas chamber to said gas passage; c) a plurality of nozzles and a plurality of stationary pins secured to said spinnerette body, said plurality of nozzles and said plurality of stationary pins being grouped into an array forming a plurality of rows and a plurality of columns, said array having a periphery, and each of said plurality of nozzles being connected to said cavity; d) a gas distribution plate secured to said spinnerette body having a plurality of first, second and third openings formed therethrough, each of said first openings accommodating one of said nozzles, each of said second openings accommodating one of said stationary pins, and each of said third openings being located adjacent to said first and second openings; e) an exterior member secured to said gas distribution plate having a plurality of first and second enlarged openings formed therethrough, each of said first enlarged openings surrounding one of said nozzles and each of said second enlarged openings surrounding one of said stationary pins, said array having at least one row and at least one column of said second enlarged openings which are located adjacent to said periphery, whereby an extruded filament exiting each of said nozzles is shrouded by pressurized gas exiting each of said first enlarged openings, and all of said extruded filaments are shrouded by pressurized gas exiting said second enlarged openings from surrounding ambient air, and said exterior member having a lower surface with a pair of cover strips secured to said lower surface, said pair of cover strips facilitating the flow of ambient air around said pressurized gas exiting through at least some of said second enlarged openings; and f) a moving surface located downstream of said exterior member onto which said fibers are collected into a non-woven web. |
