Process for forming non-woven filamentary structures from fiber-forming synthetic organic polymers

• US 3,338,992 A
• Filed: 12/21/1965
• Issued: 08/29/1967
• Est. Priority Date: 12/15/1959
• Status: Expired due to Term

• Current Assignee: Allison Kinney George
• Original Assignee: Allison Kinney George
• Inventors: ALLISON KINNEY GEORGE
• Application Number:
  US04/515,308
• Time in Patent Office: 616 Days
• US Class Current: 264/441
• CPC Class Codes: B65H 2701/31 Textiles threads or artificial strands of filaments
• CPC Class Codes: B65H 51/16 Devices for entraining material by flow of liquids or gases, e.g. air-blast devices blowing slag wool in molten state C03B37/06
• CPC Class Codes: D01D 5/08 Melt spinning methods D01D5/0023 takes precedence
• CPC Class Codes: D01D 7/00 Collecting the newly-spun products D01D5/0076 takes precedence; collecting newly-spun products with the imparting of twist D01H
• CPC Class Codes: D04H 3/16 with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion

Claims

1. A PROCESS FOR PREPARING A UNIFORM NONWOVEN WEB OF RANDOMLY DISPOSED, CONTINUOUS FILAMENTS, COMPRISING FORWARDING A MULTIFILAMENT STRAND OF CONTINUOUS SYNTHETIC ORGANIC FILAMENTS WHILE APPLYING TENSION TO THE FILAMENTS, SAID FILAMENTS BEING CAPABLE OF HOLDING AN ELECTROSTATIC CHARGE, DEVELOPING AN ELECTROSTATIC CHARGE ON THE FILAMENTS OF THE STRAND WHILE THE APPLIED TENSION PREVENTS THE FILAMENTS FROM SEPARATING DUE TO THE IMPARTED CHARGE, DIRECTING THE STRAND TOWARD A LAYDOWN ZONE, RELEASING THE TENSION FROM THE FILAMENTS TO PERMIT THEM TO SEPARATE FROM EACH OTHER, COLLECTING THE SEPARATED FILAMENTS IN THE FORM OF A RANDOM NONWOVEN WEB ON A RECEIVER IN THE LAYDOWN ZONE AND MOVING THE FRESHLY DEPOSITED WEB AWAY FROM THE LAYDOWN ZONE AT A RATE SUCH THAT THE RATIO OF FILAMENT FORWARDING SPEED TO THE SPEED OF THE RECEIVER IS AT LEAST.