C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/28 (2006.01) B01D 39/04 (2006.01) B01D 39/08 (2006.01) B03C 3/28 (2006.01) B29C 55/06 (2006.01) B29C 71/04 (2006.01) C07C 51/42 (2006.01) D01D 5/42 (2006.01) H01G 7/02 (2006.01) B29C 35/08 (2006.01)
Patent
CA 2067925
ABSTRACT OF THE DISCLOSURE A highly efficient, reliable method is provided for producing an electret filter having an excellent collection efficiency. The method comprises the steps of forming a film comprising a high molecular weight compound, splitting the film to form split yarns, subjecting the split yarns to a homo charging, and producing the electret filter from the charged split yarns.
Matsuura Satoshi
Shinagawa Yoshio
Yokoyama Akira
Mitsui Chemicals Inc.
Smart & Biggar
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