Spinning pack for manufacturing high strength yarn, and yarn manufacturing apparatus and method

1. A spinning pack comprising:

a spinneret having a nozzle unit;

a heating unit for heating the nozzle unit;

a pack body surrounding at least a part of the spinneret; and

a spinning block surrounding the pack body,

wherein the spinneret includes a first surface which defines a storage space while facing at least one surface of the spinning block, and a second surface facing the first surface,

wherein the nozzle unit includes a plurality of discharge holes and protrudes from the second surface, and

wherein the heating unit contacts with a outer side of the nozzle unit and the heating unit is disposed at the outer side of the nozzle unit.

2. The spinning pack of claim 1 ,

wherein the heating unit is disposed between the second surface and an end part of the nozzle unit.

3. The spinning pack of claim 1 ,

wherein the heating unit is in contact with the second surface or is spaced apart from the second surface at an interval of 20 mm or less from the second surface.

4. The spinning pack of claim 1 ,

wherein the heating unit includes a heating wire.

5. The spinning pack of claim 1 ,

wherein the heating unit heats the nozzle unit at a temperature of 400 to 600° C.

6. The spinning pack of claim 1 , further comprising a heater disposed on one side of the spinning block.

7. A yarn manufacturing apparatus comprising:

a spinneret having a nozzle unit for discharging molten polymer,

a heating unit for heating the nozzle unit, and

a cooling unit disposed in the nozzle unit side of the spinneret and for cooling the plurality of filaments formed by discharging a molten polymer from the nozzle unit,

wherein the spinneret includes a first surface and a second surface facing the first surface, and the second surface directs toward the cooling unit,

wherein the nozzle unit includes a plurality of discharge holes and protrudes from the second surface, and

wherein the heating unit contacts with a outer side of the nozzle unit and the heating unit is disposed at the outer side of the nozzle unit.

8. The yarn manufacturing apparatus of claim 7 , further comprising:

a converging unit for converging the plurality of cooled filaments to form a multi-filament,

a drawing unit for drawing the multi-filament, and

a winder for winding the drawn multifilament.

9. A yarn manufacturing method comprising the steps of:

discharging a molten polymer using a spinning pack to form a plurality of filaments;

cooling the plurality of filaments using a cooling unit;

converging the plurality of filaments to form a multi-filament;

drawing the multi-filament; and

winding the drawn multi-filament,

wherein the spinning pack includes:

a spinneret having a nozzle unit,

a heating unit for heating the nozzle unit,

a pack body surrounding at least a part of the spinneret, and

a spinning block surrounding the pack body,

wherein the spinneret includes a first surface which defines a storage space while facing at least one surface of the spinning block, and a second surface facing the first surface,

wherein the nozzle unit includes a plurality of discharge holes and protrudes from the second surface, and

wherein the heating unit contacts with a outer side of the nozzle unit and the heating unit is disposed at the outer side of the nozzle unit.

10. The yarn manufacturing method of claim 9 ,

wherein the heating unit heats the nozzle unit at a temperature of 400 to 600° C.

11. The yarn manufacturing method of claim 9 ,

wherein the molten polymer is spun at a speed of 500 to 4000 m/min.

12. The yarn manufacturing method of claim 9 ,

wherein the multifilament is drawn at a draw ratio of 2 to 4.

13. The yarn manufacturing method of claim 9 ,

wherein the molten polymer includes a polyester polymer, and

the yarn is a polyester yarn.