초록 ▼

A meltblowing die includes a die tip having an outwardly projecting triangular nosepiece defining an apex therealong, a row of hot melt holes spaced along the apex, and air holes positioned in relation to the hot melt holes to cause at least some of the filaments discharging therefrom to flare outwa

A meltblowing die includes a die tip having an outwardly projecting triangular nosepiece defining an apex therealong, a row of hot melt holes spaced along the apex, and air holes positioned in relation to the hot melt holes to cause at least some of the filaments discharging therefrom to flare outwardly so that the hot melt filaments deposited on an underlying moving substrate has a lateral dimiension greater than the length of the row of hot melt holes. The die may be operated to cause the filaments to be deposited on the substrate in a side-by-side sinusoidal, stitch-like pattern.

대표청구항 ▼

1. A meltblowing system for depositing a plurality of filaments onto a moving substrate or collector, comprising:a meltblowing die having (i) a die body; and (ii) a die tip mounted on the die body and having (a) a row of fiber discharge orifices formed therein along a width of said die tip, said row

1. A meltblowing system for depositing a plurality of filaments onto a moving substrate or collector, comprising:a meltblowing die having (i) a die body; and (ii) a die tip mounted on the die body and having (a) a row of fiber discharge orifices formed therein along a width of said die tip, said row of fiber discharge orifices being adapted to discharge a row of molten thermoplastic filaments therefrom, and deposit the same onto the moving substrate or collector in a pattern thereon, and (b) two rows of air passages with each row of air passages positioned on an opposite side of said row of fiber discharge orifices, said two rows of air passages including respective center air passages positioned on opposite sides of said row of fiber discharge orifices and additional air passages positioned outwardly from the center air passages, said additional air passages angling outwardly in opposite directions along the width of said die tip such that air discharged from said additional air passages causes the filament pattern deposited onto the substrate or collector to have a lateral dimension larger than the length of the row of fiber discharge orifices.