Spinning nozzle for producing nanofibrous and microfibrous materials composed of fibres having a coaxial structure

Abstract

Spinning nozzle for production of nanofibrous and microfibrous materials comprises: a first plate ( 1 ) provided with at least one continuous groove ( 2 ) for directing a first material to an outlet mouth portion ( 3 ) of the continuous groove ( 2 ) in a face ( 4 ) of the first plate ( 1 ); a second plate ( 5 ) provided with at least one continuous groove ( 6 ) for directing a second material to an outlet mouth portion ( 7 ) of the continuous groove ( 6 ) of the second plate ( 5 ), the outlet mouth portion ( 7 ) being arranged adjacent to the outlet mouth portion ( 3 ) of the first plate ( 1 ); and a separating plate ( 8 ) arranged between the first plate ( 1 ) and the second plate ( 5 ) for separating the continuous grooves ( 2 ) of the first plate ( 1 ) from the continuous grooves ( 6 ) of the second plate ( 5 ), while the face ( 9 ) of the separating plate ( 8 ) forms with the face ( 4 ) of the first plate ( 1 ) and/or the face ( 10 ) of the second plate ( 5 ) a continuous surface in the region of the outlet mouth portions ( 3; 7 ) of the continuous grooves ( 2; 6 ).

1 . Spinning nozzle for production of nanofibrous and microfibrous materials, comprising:
 a first plate provided with at least one continuous groove for directing a first material to an outlet mouth portion of the continuous groove in a face of the first plate;   a second plate provided with at least one continuous groove for directing a second material to an outlet mouth portion of the continuous groove of the second plate, the outlet mouth portion being arranged adjacent to the outlet mouth portion of the first plate, and   a separating plate arranged between the first plate and the second plate for separating the continuous grooves of the first plate from the continuous grooves of the second plate, while a face of the separating plate forms with the face of the first plate and/or the face of the second plate a continuous surface in the region of the outlet mouth portions of the continuous grooves.   
     
     
         2 . Spinning nozzle according to  claim 1 , wherein the first plate is made of a non-conductive material while the second plate and the separating plate are made of a conductive material. 
     
     
         3 . Spinning nozzle according to  claim 1 , further comprising a third plate which is provided with continuous grooves mouthing at a face of the third plate and which adjoins the second plate, the outlet mouth portions of the continuous grooves of the third plate being arranged adjacent to the corresponding outlet mouth portions of the continuous grooves of the second plate. 
     
     
         4 . Spinning nozzle according to  claim 1 , wherein the continuous grooves of the first plate are wider than the continuous grooves of the second plate and extend beyond the continuous grooves of the second plate on either side, each continuous groove having a longitudinal axes, the longitudinal axes of the continuous grooves overlapping each other at least in the region of the outlet mouth portions of the continuous grooves when viewed in a projection which is perpendicular to the separating plate. 
     
     
         5 . Spinning nozzle according to  claim 3 , further comprising a fourth plate spaced from the second plate and serving for supplying the shaping and/or heating air to the faces of the first plate, separating plate, and second plate, respectively. 
     
     
         6 . Spinning nozzle according to  claim 4 , further comprising a fifth plate, which is spaced from the third plate, and a sixth plate, which is spaced from the first plate, the fifth and sixth plates serving for supplying the shaping and/or heating air to the faces of the first plate, separating plate, second plate, and third plate, respectively, from either side. 
     
     
         7 . Spinning nozzle according to  claim 1 , wherein the faces of the first plate, separating plate, and second plate, respectively, form a channel in the outlet face of the spinning nozzle, the longitudinal axis of the channel being parallel to that of the face of the separating plate. 
     
     
         8 . Spinning nozzle according to  claim 4 , wherein the faces of the first plate, separating plate, second plate, and third plate, respectively, form a channel in the outlet face of the spinning nozzle, the longitudinal axis of the channel being parallel to that of the face of the separating plate.