Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1992-04-10
1995-03-14
Aftergut, Jeff H.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156180, 156181, 156296, 156433, 156441, 1562726, 1562731, 4251748E, 264 22, D04H 316
Patent
active
053974131
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.
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Gilmore, Thomas F., "Spunbond Web Formation Processes: A Critical Review" presented at INSIGHT 90 Conference, Toronto, Oct. 1990.
Francis John V.
Grubbs William J.
Trimble Lloyd E.
Zeldin Leon M.
Aftergut Jeff H.
Fiberweb North America, Inc.
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