Apparatus and process for melt-blowing a fiberforming thermoplas

Details Apparatus and process for melt-blowing a fiberforming thermoplas Apparatus and process for melt-blowing a fiberforming thermoplas

1980-04-08

1983-04-19

Woo, Jay H.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Noninterengaged fiber-containing paper-free web or sheet...

156176, 264 12, 425 801, D04H 104

Patent

active

043805701

ABSTRACT:
There is disclosed a novel apparatus and process for melt-blowing from fiberforming thermoplastic molten polymers to form fine fibers by extruding through orifices in nozzles the molten polymer at low melt viscosity at high temperatures where the molten fibers are accelerated to near sonic velocity by gas being blown in parallel flow through small orifices surrounding each nozzle. The extruded molten polymer is passed to the nozzles through a first heating zone at low incremental increases in temperature and thence rapidly through said nozzles at high incremental increases in temperature to reach the low melt viscosity necessary for high fiber acceleration at short residence time to minimize or prevent excessive polymer degradation.

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