Method for producing electret filter

Details Method for producing electret filter Method for producing electret filter

1992-05-01

1993-09-21

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 24, 264154, 264103, 2642888, 264DIG47, 4251748E, B29C 3510, B29C 7104

Patent

active

052466370

ABSTRACT:
A highly efficient, reliable method is provided for producing an electret filter having an excellent collection efficiency. In this method, a film containing a resin material with high molecular weight is formed and split to form split yarns. The split yarns are then subjected to a charging treatment, and the electret filter is produced from the charged split yarns.

REFERENCES:
patent: Re32171 (1986-06-01), Turnhout
patent: 4310478 (1982-01-01), Balslev et al.
patent: 4375718 (1983-03-01), Wadsworth et al.
patent: 4626263 (1986-12-01), Inoue et al.
patent: 5112677 (1992-05-01), Tani et al.
patent: 5143767 (1992-09-01), Matsuura et al.

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