Method for producing filter material formed of melt-blown non-wo

Details Method for producing filter material formed of melt-blown non-wo Method for producing filter material formed of melt-blown non-wo

1989-11-17

1992-09-22

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By impinging or atomizing with gaseous jet or blast

264518, 264555, 264112, 264113, 264121, 156167, D04H 500

Patent

active

051494680

ABSTRACT:
A method for producing a melt-blown non-woven mat wherein a fiber-forming thermoplastic polymer resin is extruded in molten form through a row of nozzles into a stream of hot gas which attenuates the molten resin into fibers that form a fiber stream. The fibers are collected on a receiver in the path of the fiber stream to form the non-woven mat. At least two spaced rows of nozzles are provided to produce first and second fiber streams spaced from each other. The spaced fiber streams are collected on the receiver to form a first non-woven mat portion and a second non-woven mat portion and with the first non-woven mat portion overlaying the second non-woven mat portion. At a position intermediate the first and second fiber streams, material different than the fiber-forming resin is injected to have the different material captured between the first and second fiber streams and thereby form a collected structure of the first and second mat portions sandwiching the different material.

REFERENCES:
patent: 3337669 (1967-08-01), Shannon et al.
patent: 3544414 (1970-12-01), Simison
patent: 3849241 (1974-11-01), Buntin et al.
patent: 4380570 (1983-04-01), Schwarz

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