Title: Fibre fleece of electrostatically spun fibres and methods of making same

Abstract: In a process for the production of fibre filters, the fibre material is sprayed electrostatically from the liquid state and deposited as a fibre fleece on a conductive support. The starting materials used are solutions of high polymers in readily volatile solvents. The filters obtained have substantially improved properties.

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Inventors: Simm, Walter (Leverkusen, DE, US)
Gosling, Claus (Leverkusen, DE, US)
Bonart, Richard (Regensburg, DE, US)
VON Falkai, Bela (Gohr, DE, US)

Application Number: 813720
Filing Date: 1977-07-07
Publication_date: 1979-03-06
Assignee: Bayer Aktiengesellschaft (Leverkusen, DE)
Primary Class(es): 428/212 55/DIG39, 156/62.4, 156/62.8, 264/8, 264/10, 264/113, 264/114, 264/115, 264/123, 264/440, 264/441, 427/462, 427/484, 428/316.6, 428/332, 428/398, 428/400,
Other Classes:
US Patent Ref:

2795290	Jun, 1957	Butsch et al.	55/103.
2810426	Oct, 1957	Till et al.	264/24.
2888095	May, 1959	Perrini et al.	55/487.
3280229	Oct, 1966	Simons	264/10.
3338992	Aug, 1967	Kinney	264/24.
3400520	Sep, 1968	Sakurai	55/487.
3406660	Oct, 1968	Simm	118/626.
3689608	Sep, 1972	Hollberg et al.	264/24.

Other Refs:
Primary Examiner: Ball, Michael W.
Assistant Examiner:
Attorney: Sprung, Felfe, Horn, Lynch & Kramer