公开(公告)号：DE69303711T2

公开(公告)日：1997-02-20

申请号：DE69303711

申请日：1993-03-29

Applicant: FIBERWEB NORTH AMERICA INC

Inventor： TRIMBLE LLOYD ,  ZELDIN LEON ,  GRUBBS WILLIAM ,  FRANCIS JOHN

IPC: D04H3/03 ,  D04H3/16

Abstract: A slot draw attenuator apparatus and method are provided for producing webs of spunbonded thermoplastic filaments having improved cover even at low basis weights. The filaments are introduced to a slot draw attenuator having corona electrodes mounted in an elongate insulator bar and staggered and spaced along one wall of the attenuator slot near the exit end thereof. The corona electrodes are electrically connected to a high voltage source. The opposing wall of the slot is grounded. A corona is created in the attenuator slot so that the filaments are charged as they exit the attenuator. The electrostatic charge induces repelling forces in the filaments so that the filaments spread before they are randomly deposited upon a forming belt.

公开(公告)号：DE69303711D1

公开(公告)日：1996-08-22

申请号：DE69303711

申请日：1993-03-29

Applicant: FIBERWEB NORTH AMERICA INC

Inventor： TRIMBLE LLOYD ,  ZELDIN LEON ,  GRUBBS WILLIAM ,  FRANCIS JOHN

IPC: D04H3/03 ,  D04H3/16

Abstract: A slot draw attenuator apparatus and method are provided for producing webs of spunbonded thermoplastic filaments having improved cover even at low basis weights. The filaments are introduced to a slot draw attenuator having corona electrodes mounted in an elongate insulator bar and staggered and spaced along one wall of the attenuator slot near the exit end thereof. The corona electrodes are electrically connected to a high voltage source. The opposing wall of the slot is grounded. A corona is created in the attenuator slot so that the filaments are charged as they exit the attenuator. The electrostatic charge induces repelling forces in the filaments so that the filaments spread before they are randomly deposited upon a forming belt.