EP 0173333 A2 19860305 - Extrusion process and an extrusion die with a central air jet.
Title (en)
Extrusion process and an extrusion die with a central air jet.
Title (de)
Extrudierverfahren und Extrudierdüse mit zentralem Luftstrom.
Title (fr)
Procédé d'extrusion et filière d'extrusion ayant un jet d'air central.
Publication
Application
Priority
US 64566884 A 19840830
Abstract (en)
A thermoplastic material extrusion mechanism is provided which includes a die head having a centrally disposed high velocity gas delivery means adapted to continuously emit a jet of a gas having shear layers, at least one chamber for the thermoplastic material, thermoplastic material delivery means arranged at least partially surrounding the centrally disposed high velocity gas delivery means for directing extruded thermoplastic material emitted from the thermoplastic material delivery means toward the gas jet, causing the extruded thermoplastic material to be introduced into the shear layers of the gas jet, and a thermoplastic material conduit which communicates the at least one chamber with each of the thermoplastic material extrusion openings. A method of producing fibers of a thermoplastic material is also provided which comprises the steps of (a) forming a high velocity gas jet having shear layers, (b) extruding at least one stream of a molten thermoplastic material from at least one thermoplastic material delivery means arranged adjacent and at least partly surrounding the high velocity gas jet, and (c) merging the at least one thermoplastic material stream with the shear layers of the high velocity gas jet to attentuate the thermoplastic material into fibers, forming thereby fiber streams of the thermoplastic material.
IPC 1-7
IPC 8 full level
D01D 5/08 (2006.01); D01D 4/02 (2006.01); D04H 1/56 (2006.01); D04H 3/02 (2006.01); D04H 3/03 (2006.01)
CPC (source: EP KR)
D01D 4/02 (2013.01 - KR); D01D 4/025 (2013.01 - EP); D04H 1/56 (2013.01 - EP)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0173333 A2 19860305; EP 0173333 A3 19880302; EP 0173333 B1 19910522; AU 4683385 A 19860306; AU 576619 B2 19880901; CA 1284411 C 19910528; DE 3582908 D1 19910627; JP H0660448 B2 19940810; JP S61113809 A 19860531; KR 870001915 A 19870328; KR 920008961 B1 19921012; ZA 856523 B 19860430
DOCDB simple family (application)
EP 85110883 A 19850829; AU 4683385 A 19850828; CA 489317 A 19850823; DE 3582908 T 19850829; JP 19183385 A 19850830; KR 850006302 A 19850830; ZA 856523 A 19850827