Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Filaments, tow, and webs formed by hydraulic spinning










Image Number 5 for United States Patent #5244723.

A method of forming substantially continuous filaments which involves the steps of (1) extending a molten thermoplastic polymer through a die having a plurality of orifices to give a plurality of substantially continuous filaments; (2) quenching the filaments by contacting them with a quenching fluid having a temperature less than that of the filaments and a zero to high imposed velocity which, if other than zero, has a component which is in a direction other than parallel with the movement of filaments; (3) entraining and drawing the filaments in a nozzle with an attenuating liquid having a linear speed of at least about 400 feet/minute; and (4) collecting the drawn filaments. The filaments have an average diameter in the range of from about 5 to about 75 micrometers and a high variability of filament diameter from filament to filament and along the length of any given filament. In addition, at least some of such filaments are present as filament bundles. Such filaments can be collected as tow or can form the basis of a nonwoven web which is characterized by minimal filament-to-filament fusion bonding. The preferred thermoplastic polymers are polyolefins, with the most preferred polyolefin being polypropylene.








 
 
  Recently Added Patents
Organic electroluminescence element
Erasing a non-volatile memory (NVM) system having error correction code (ECC)
Semiconductor device and method of manufacturing the same
Per-request control of DNS behavior
Crystal structure of human JAK3 kinase domain complex and binding pockets thereof
Wireless control kit for camera
System and method for routing streaming data requests
  Randomly Featured Patents
Tunable inter-digital capacitor and method of manufacturing the same
Self-advancing endoscope
Solid-state imaging device, method of driving same, and camera apparatus
Anode material for lithium-ion chemical power sources and method of obtaining thereof
Telephone handset
Adjustable pushrod guide plate assembly
Large screen television
Radio-controlled timepiece and control method for a radio-controlled timepiece
Osteospermum Plant Named `Balserilla`
High speed memory device with reduced resistance and leakage current