Method of manufacturing nano-fibers with excellent fiber formation
The present invention relates to a method for producing nanofibers with an excellent fiber formation property, characterized in that: when nanofibers 3 having a thickness of a nano level are produced by electrostatically spinning a spinning liquid 1 of a polymer resin solution on a collector 8 through a nozzle 2 under a high voltage, a collector 8 with a heater is used as the collector. The present invention can greatly improve the fiber formation property of the nanofibers.
1 . A method for producing nanofibers with an excellent fiber formation property, characterized in that: when nanofibers 3 having a thickness of a nano level are produced by electrostatically spinning a spinning liquid 1 of a polymer resin solution on a collector 8 through a nozzle 2 under a high voltage, a collector 8 with a heater 6 is used as the collector 8 .
2 . The method of claim 1 , wherein the collector with the heater 6 is a laminate element of a three layer structure which is composed of (i) a supporting element 7 which is a lower end surface, (ii) a conductive plate 5 which is an upper end surface, and (iii) a heater 6 of direct heating type located between the supporting element and the conductive plate.
3 . The method of claim 1 or 2 , wherein the heater 6 is a heating plate 6 a which has hot wires 6 b covered with dielectric polymer arranged at constant intervals and a temperature controller 6 c attached thereto.
4 . The method of claim 1 , wherein the heater 6 is a heater indirectly heated by heat transfer medium circulation.
5 . The method of claim 1 , wherein the collector 8 with the heater 6 is a laminate element of a three layer structure which is composed of (i) a supporting element 7 which is a lower end surface, (ii) a conductive plate 5 which is an upper end surface, and (iii) a heater 6 located between the supporting element and the conductive plate and indirectly heated by heat transfer medium circulation.
6 . The method of claim 4 or 5 , wherein the heat transfer medium is water, steam or oil.
7 . The method of claim 1 or 5 , wherein the heater 6 is of such a plate type which has a heat transfer medium circulation tube 6 e equipped inside and is connected to a circulation type heat reservoir 6 d through a heat transfer medium feed section 6 f and a heat transfer medium discharge section 6 g.
8 . The method of claim 2 or 5 , wherein the conductive plate 5 is made from aluminum, copper or stainless steel.
9 . The method of claim 2 or 5 , wherein the supporting element 7 is made from plastic which is dielectric.
10 . The method of claim 3 , wherein the dielectric polymer is silicon.
11 . The method of claim 1 , wherein the electrostatic spinning method is a top-down electrostatic spinning type, a down-top electrostatic spinning type or a horizontal electrostatic spinning type.