Title:
FILTER MATERIAL FOR AIR FILTER AND AIR FILTER
Document Type and Number:
Japanese Patent JP3968613
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To filter fine dustinternally to prevent splashing or reproduction of dust and to improve the dust collecting rate, pressure loss and dust holding capacity by providing a porous film-like cohesive part consisting of a cohesive water-based thermoplastic resin on the uppermost part of a high-density layer.
SOLUTION: A filter material F consists of a high-density layer 1, a porous film-like conhesive part 2 and a low-density layer 3. The cohesive part 2 is formed by sticking a cohesive water-based thermoplastic resin between the surface of structural fiber and the fiber in the uppermost part of the high-density layer 1 and has lots of film parts and gap parts. As for the filter material F, a single chemical fiber such as polyester fiber and nylon fiber or a mixture of two or more kinds of these can be used. As for the water-based thermoplastic resin for the cohesive part 2, acrylic, vinyl ether or rubber-based material having cohesion property even in a dry state can be used. The porous film-like cohesive part 2 is produced by laminating two or more fiber layers so as to have a density gradation to obtain a dry nonwoven fabric, after immersing the fabric in a water-based thermoplastic resin soln. and drying it to produce migration. Thereby, fine dust passing through the low-density layer 3 can be trapped to prevent splashing and to decrease the reproduction of dust and the filter performance can be improved.
Inventors:
Masahiko Miyoshi
Application Number:
JP21658498A
Publication Date:
August 29, 2007
Filing Date:
July 31, 1998
Export Citation:
Assignee:
Hiroaki Kanai
International Classes:
B01D39/16; B01D46/00; (IPC1-7): B01D39/16; B01D46/00
Domestic Patent References:
| JP4026006U | ||||
| JP62110721A | ||||
| JP5265622A | ||||
| JP8103612A | ||||
| JP2091611U |