Patent
Melt spinning process for polymeric filaments
TLDR
In this article, a melt-spinning process for polymeric filaments at a spinning speed controlled by a positive mechanical withdrawal is described, whereby a drawing and necking down of the filaments occur below the spinning pack.Abstract:
A melt-spinning process for spinning polymeric filaments at a spinning speed controlled by a positive mechanical withdrawal means that increases the speed of the filaments to above 7,000 meters/minute whereby a drawing and necking down of the filaments occur below the spinning pack, directing a gas into a zone extending from the spinning pack to a location between the spinning pack and the withdrawal means, maintaining the zone under superatmospheric pressure of less than 0.03 kg/cm2 and increasing the velocity of the gas as it leaves the zone to a level greater than the velocity of the filaments to reduce the extent of necking down of the filaments.read more
Citations
More filters
Patent
Method for high-speed spinning of bicomponent fibers
Jing-Chung Chang,Joseph V. Kurian,Young D. T. Nguyen,James Edmond Van Trump,George Vassilatos +4 more
TL;DR: In this article, highly crimped, fully drawn bicomponent fibers, prepared by melt-spinning, followed by gas-flow quenching, heat treatment and high speed windup, are provided.
Patent
Apparatus for melt spinning multifilament yarns
TL;DR: In this article, an apparatus and use thereof for melting multifilament yarns from fiber-forming polymers at windup speeds of at least 2000 m/min is disclosed.
Patent
Method for producing nonwoven thermoplastic webs
TL;DR: In this article, a spin-bond was operated with additional high-pressure jets at the outlet gap immediately above the collecting belt and below the intermediate passage connecting that gap with the cooling chamber to establish a higher velocity of the filaments which are collected in the nonwoven fabric on the belt.
Patent
Multilobal polymer filaments and articles produced therefrom
TL;DR: In this paper, a multilobal cross-section polymer filament was proposed for yarns with a filament factor of 2.0 or greater and a tip ratio of greater than about 0.2.
Patent
Melt spinning process for polyamide industrial filaments
TL;DR: In this article, an improved melt spinning process for preparing nylon filaments is described, where the freshly-extruded filaments enter an enclosed zone that is maintained at superatmospheric pressure by a controlled flow of air at low positive pressure and the filaments leave the zone through a constriction, either a venturi or a tube, assisted by the cocurrent flow of such air at a high controlled velocity.
References
More filters
Patent
Apparatus for forming nonwoven webs
Appel David W,Michael Tod Morman +1 more
TL;DR: In this article, an improved method and apparatus for forming nonwoven webs by spinning filaments into a quench chamber where they are contacted with a quenching fluid, then utilizing the quench fluid to draw the filaments through a two-dimensional nozzle spanning the full machine width, and collecting the filament as a web on a porous surface.
Patent
Poly(ethylene terephthalate)filaments
TL;DR: In this paper, a spinneret with capillary-dimensions is used to produce high shear as the polyester is extruded, and is applicable also to copolyesters whose filaments show a similar low skin-core in relation to their stress at 20% extension, the precise values for copolymers being different from the relationship for poly(ethylene terephthalate).
Patent
Melt blowing apparatus with parallel air stream fiber attenuation
TL;DR: In this article, a mechanism and method for producing a plurality of elongate filaments of plastic material from a die head which has a plastic flow chamber for receiving a flow of heated plastic material with the chamber leading to parallel small flow passages having individual tubes extending from the individual passages and having gas flow ducts positioned laterally outwardly of the die head.
Patent
Poly(ethylene terephthalate) flat yarns and tows
TL;DR: In this article, the authors describe poly(ethylene terephthalate) flat yarns and tows having physical properties and dyeability more akin to cellulose acetate than to conventional poly(methylacetate), which are prepared directly by spinning at speeds of about 4000 meters/minute.
Patent
Process for preparing new polyester filaments
TL;DR: In this article, a spinneret with capillary-dimensions is used to produce high shear as the polyester is extruded, and is applicable also to copolyesters whose filaments show a similar low skin-core in relation to their stress at 20% extension, the precise values for copolymers being different from the relationship for poly(ethylene terephthalate).