Title:
FILTER MEDIUM HAVING ANTISTATIC PROPERTY AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3300529
Kind Code:
B2
Abstract:
PURPOSE: To provide a filter medium excelling in antistatic property by coating nonwoven fabric or felt made of polyimide fiber with a conducting material and condensation polycyclic polynuclear aromatic resin or the like.
CONSTITUTION: Nonwoven fabric or felt made of polyimide fiber having a repeated unit represented by the general formula I (where n is an integer larger than 1, X is a tetravalent aromatic group, such as the formula II, and R is a kind of divalent aromatic groups, such as the formula III). The nonwoven fabric or the like is coated with a conducting material, condensation polycyclic polynuclear aromatic resin and/or solvent soluble cold hardening fluororesin and fluoroelastomer dispersed in an organic solvent. After that, the obtained product is left at room temp. or heated. In this way, a filter medium excelling in heat resistance and chemical resistance and less apt to clog and having good antistatic property is obtained.
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Inventors:
Kiyomine Taniguchi
Tsuyoshi Hazeyama
Hitoshi Otaka
Tsuyoshi Hazeyama
Hitoshi Otaka
Application Number:
JP8360494A
Publication Date:
July 08, 2002
Filing Date:
March 31, 1994
Export Citation:
Assignee:
Nittetsu Mining Co., Ltd.
International Classes:
B01D39/14; B01D39/16; B01D39/20; B01D46/50; B32B27/34; C08G73/10; C09D127/12; B01D39/00; D01F6/74; D06M11/74; D06M11/83; D06M15/227; D06M15/233; D06M15/256; D06M15/353; D06M23/08; D06M23/10; D06N3/00; D06N3/04; (IPC1-7): B01D39/14; B01D39/00; B01D39/16; B01D46/50; B32B27/34
Domestic Patent References:
| JP22856A | ||||
| JP56176017U |
Attorney, Agent or Firm:
Shohei Oguri (8 outside)