Title:
THIN FILTER
Document Type and Number:
Japanese Patent JP3777126
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a nonwoven fabric for a filter used in various air cleaners or fluid treatment devices, especially a nonwoven fabric suitable as a filter having excellent water resistance, good initial collection efficiency and shape holding characteristics and used as a cleaner of a car, a truck or the like.
SOLUTION: A fiber laminate having a three-layered structure is constituted of an outside layer comprising a spun bonded nonwoven fabric to which water repelling treatment is applied, an intermediate layer comprising a fiber layer formed from hydrophobic fibers and hydrophilic fibers and an inside layer comprising a fiber layer formed from hydrophobic fibers, hydrophilic fibers and thermally adhesive fibers and subjected to physical entangling treatment from the inside layer toward the outside layer to be integrated. Resin bonding treatment and corrugation processing treatment are successively applied to the whole of the fiber laminate having the three-layered structure to obtain the density gradient type thin filter.
Inventors:
Hirohisa Taniguchi
Shin Kinosaki
Masumi Shibata
Shin Kinosaki
Masumi Shibata
Application Number:
JP2002010947A
Publication Date:
May 24, 2006
Filing Date:
January 21, 2002
Export Citation:
Assignee:
Kureha Tech Co., Ltd.
Toyota Boshoku Co., Ltd.
Toyota Boshoku Co., Ltd.
International Classes:
B01D39/16; F02M35/024; B01D39/18; D04H1/498; D04H3/16; (IPC1-7): B01D39/16; B01D39/18; D04H1/46; D04H3/16; F02M35/024
Domestic Patent References:
| JP6262012A | ||||
| JP9192427A | ||||
| JP2032928B2 |
Attorney, Agent or Firm:
Taiichi Miyamoto