초록

Meltblowing apparatus includes electrodes spaced from the meltblowing die discharge and protruding grounded emitters positioned proximate the die discharge. The preferred emitters are in the form of pointed pins spaced along and flanking the die discharge.

대표청구항 ▼

A meltblown apparatus for manufacturing meltblown electrostatic charged webs which comprises (a) an elongate die having a plurality of orifices formed in a die tip thereof and being electrically grounded; (b) means for extruding molten thermoplastic resin through the die tip orifices to form a plura

A meltblown apparatus for manufacturing meltblown electrostatic charged webs which comprises (a) an elongate die having a plurality of orifices formed in a die tip thereof and being electrically grounded; (b) means for extruding molten thermoplastic resin through the die tip orifices to form a plurality of side-by-side fibers; (c) means for blowing converging air streams on the fiber extruded from the die tip orifices to form a fiber-air stream; (d) a pair of elongate and horizontal electrodes spaced from the outlets of the die tip orifices, one electrode being above the fiber-air stream and one below the fiber-air stream; (e) a pair of emitter means secured to the die and being electrically grounded thereto and protruding outwardly therefrom, one emitter means being positioned above the die tip and the other below the die tip, and each emitter means having an outer end in close proximity to the die tip orifice outlets; and (f) means for applying a high voltage source with positive polarity to the electrodes to establish an electrostatic field between the electrodes and the emitter means.