Cylindrical filter and process for producing the same

Details Cylindrical filter and process for producing the same Cylindrical filter and process for producing the same

1997-03-17

1998-09-08

Walker, W. L.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264541, 2104941, 21049701, 2104972, 428373, B29C 4900

Patent

active

058041281

ABSTRACT:
A cylindrical filter formed of stacked microfine, conjugate fibers consisting of a higher melting point component and a lower melting point component, the fiber diameter of the conjugate fibers being varied into a smaller one in the thickness direction of the filter and along with the passing direction of a fluid to be filtered, and the contact points of the conjugate fibers being melt-adhered by the lower melting point component is provided. This cylindrical filter is produced by a process of subjecting a higher melting point component and a lower melting point component each consisting of a fiber-forming thermoplastic polymer to conjugate melt-blow spinning so that the fiber diameter is varied during the spinning into a smaller one in the thickness direction of the filter and along with the passing direction of the fluid, winding up and stacking the fibers on a core to form a cylindrical shape on the core, heat-treating the resulting web at a temperature higher than the melting point of the lower melting point component and lower than the melting point of the higher melting point component, before and/or at the time of or after the winding-up, and drawing out the core.

REFERENCES:
patent: 3423266 (1969-01-01), Davies et al.
patent: 3692618 (1972-09-01), Dorschner et al.
patent: 3802817 (1974-04-01), Matsuki et al.
patent: 4726901 (1988-02-01), Pall et al.
patent: 4756786 (1988-07-01), Malaney
patent: 4861633 (1989-08-01), Abe
patent: 5382400 (1995-01-01), Pike et al.

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