METODO DI FILATURA AD UMIDO CHE USA UN BAGNO DI COAGULAZIONE CON UN TUBO DI FILATURA

• Main Authors: KAZUNARI NISHIYAMA, KEISAKU NAGASAWA
• Format: Patent
• Language: Italian
• Published: 09.11.1988
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES

PURPOSE:To enable high-speed spinning under stable spinning properties without damaging fiber properties, by extruding a spinning dope to a coagulating solution at >= critical linear velocity of extrusion, changing the direction of dope steam to that of a flow tube at a point separately from the face of a spinneret and taking up the yarn. CONSTITUTION:First, spinning dope is extruded from spinning holes 4 of a spinneret 3 directly to a coagulating solution 6 at >= critical linear velocity of extrusion. Consequently, extruded dope stream 8 goes straight along a spinning hole axis, changes the direction at a point 9 and flows toward a flow tube 5. Successively the yarn 10 which is coagulating is introduced to the flow tube 5 and taken out as coagulated yarn 11 together with the coagulating solution from the flow tube 5 to complete wet spinning. The spinning both is observed while raising the extrusion linear velocity of dope and the linear velocity of extrusion when the dope stream develops a phenomenon to travel in the above-mentioned manner may be determined as the critical linear velocity of extrusion.