Device and method for manufacturing thread line

Abstract

Production of a yarn, using a spinneret having numerous spinning holes arranged in a straight line(s), and a spinning tube installed below it, spaced from it, and having a filament passage rectangular in cross section with its long side direction agreeing with the direction in which the spinning holes are arranged side by side, wherein gas is injected from the injection holes formed on both the long sides of the filament passage for injecting gas obliquely downward to the filaments, for disposing the numerous filaments in a row and for forming a gas stream flowing downward in the filament passage, characterized in that the speed of the gas stream flowing downward in the filament passage is not less than 60% of the take-up speed of the numerous filaments, or that the gas generated from the numerous filaments is sucked and discharged outside, in the range between the spinneret and the spinning tube. Even if the yarn runs at a high speed, the obtained yarn can have a high elongation.

1 . A method for producing a yarn consisting of numerous filaments, using: 
 (a) a spinneret having numerous spinning holes to discharge a flowable polymer continuously for forming filaments,    (b) a spinning tube having a filament passage through which the numerous filaments formed by said numerous spinning holes run downward from said spinneret, and installed below and spaced from said spinneret,    (c) an oiling means for applying an oil to the numerous filaments coming out of said spinning tube,    (d) a filament take-up means for taking up the numerous filaments coming from said oiling means, and    (e) a winding means for winding the numerous filaments coming from said filament take-up means, characterized in that    (f) gas injection holes are provided, which inject gas obliquely downward from outside the numerous filaments entering the filament passage of said spinning tube, toward the numerous filaments, while the numerous filaments are still flowable, to ensure that the numerous filaments can be disposed along one straight line or one circle without overlapping each other, and further to ensure that, subsequently after disposing the numerous filaments, the injected gas can form a gas stream flowing downward together with the numerous filaments in the filament passage of said spinning tube, and    (g) the velocity of the gas stream flowing downward together with the numerous filaments in the filament passage of said spinning tube is not less than 60% of a take-up speed of the numerous filaments taken up by said filament take-up means.    
   
   
       2 . A method for producing a yarn, according to  claim 1 , wherein said numerous filaments are disposed along one straight line; the cross sectional form of the filament passage of said spinning tube is rectangular; the direction of the long sides of said rectangle agrees with the direction of said straight line; and the following relation is satisfied  
         d× 3≦ Ex≦d× 20  
     where Ex is the length of the short sides of said rectangle, and d is the diameter of said spinning holes.  
   
   
       3 . A method for producing a yarn, according to  claim 2 , wherein said numerous spinning holes are arranged in straight lines; and the number of the straight lines is 3 or less.  
   
   
       4 . A method for producing a yarn, according to  claim 1 , wherein the following relation is satisfied:  
         La≦Lg/ 2  
     where Lg is the distance between said spinneret and the position at which said numerous filaments are solidified to lose their flowability and reach the take-up speed of the numerous filaments taken up by said filament take-up means, and La is the distance between said spinneret and the position at which the acceleration of said numerous filaments becomes largest.  
   
   
       5 . A method for producing a yarn, according to  claim 4 , wherein the velocity of the gas stream flowing downward together with said numerous filaments in the filament passage of said spinning tube is higher than the running speed of said numerous filaments in the range of the distance Lg between said spinneret and the position at which the running speed of said numerous filaments reaches the take-up speed of the numerous filaments taken up by said filament take-up means.  
   
   
       6 . A method for producing a yarn, according to  claim 1 , wherein a gas suction and discharge means for sucking and discharging gas existing around the numerous filaments running from said spinning holes toward said filament passage is installed between said spinneret and said spinning tube, to ensure that the gas existing around said numerous filaments can be sucked and discharged.  
   
   
       7 . A method for producing a yarn, according to  claim 6 , wherein the numerous filaments are disposed along one straight line; the cross sectional form of the filament passage of said spinning tube is rectangular; the direction of the long sides of said rectangle agrees with the direction of said straight line; and the following relation is satisfied  
         Ex≦ 10 mm  
     where Ex is the length of the short sides of said rectangle.  
   
   
       8 . A method for producing a yarn consisting of numerous filaments, using: 
 (a) a spinneret having numerous spinning holes formed to discharge a flowable polymer continuously for forming filaments,    (b) a spinning tube having a filament passage through which the numerous filaments formed by said numerous spinning holes run downward from said spinneret, and installed below and spaced from said spinneret,    (c) an oiling means for applying an oil to the numerous filaments coming out of said spinning tube,    (d) a filament take-up means for taking up the numerous filaments coming from said oiling means, and    (e) a winding means for winding the numerous filaments coming from said filament take-up means, characterized in that    (f) gas injection holes are provided, which inject gas obliquely downward from outside the numerous filaments entering the filament passage of said spinning tube, toward the numerous filaments, while the numerous filaments are still flowable, to ensure that the numerous filaments can be disposed along one straight line or one circle without overlapping each other, and further to ensure that, subsequently after disposing the numerous filaments, the injected gas can form a gas stream flowing downward together with the numerous filaments in the filament passage of said spinning tube, and    (g) the following relation is satisfied:        La≦Lg/ 2    where Lg is the distance between said spinneret and the position at which said numerous filaments are solidified to lose their flowability and reach the take-up speed of the numerous filaments taken up by said filament take-up means, and La is the distance between said spinneret and the position at which the acceleration of said numerous filaments becomes largest.    
   
   
       9 . A method for producing a yarn, according to  claim 8 , wherein the velocity of the gas stream flowing downward together with said numerous filaments in said filament passage is higher than the running speed of said numerous filaments.  
   
   
       10 . A method for producing a yarn consisting of numerous filaments, using: 
 (a) a spinneret having numerous spinning holes formed to discharge a flowable polymer continuously for forming filaments,    (b) a spinning tube having a filament passage through which the numerous filaments formed by said numerous spinning holes run downward from said spinneret, and installed below and spaced from said spinneret,    (c) an oiling means for applying an oil to the numerous filaments coming out of said spinning tube,    (d) a filament take-up means for taking up the numerous filaments coming from said oiling means, and    (e) a winding means for winding the numerous filaments coming from said filament take-up means, characterized in that    (f) gas injection holes are provided, which inject gas obliquely downward from outside the numerous filaments entering the filament passage of said spinning tube, toward the numerous filaments, while the numerous filaments are still flowable, to ensure that the numerous filaments can be disposed along one straight line or one circle without overlapping each other, and further to ensure that, subsequently after disposing the numerous filaments, the injected gas can form a gas stream flowing downward together with the numerous filaments in the filament passage of said spinning tube, and    (g) a gas suction device is provided between said spinneret and said spinning tube, to suck the gas existing around said numerous filaments and to discharge the gas outside.    
   
   
       11 . A method for producing a yarn, according to  claim 10 , wherein the width of said filament passage in the direction perpendicular to the direction in which said numerous filaments are disposed side by side is 10 mm or less.  
   
   
       12 . A method for producing a yarn, according to  claim 10 , wherein the suction of the gas existing around said numerous filaments is carried out on both sides of the disposal of said numerous filaments.  
   
   
       13 . A method for producing a yarn, according to  claim 10 , wherein said numerous spinning holes are arranged in straight lines; and the number of the straight lines is 3 or less.  
   
   
       14 . A method for producing a yarn, according to  claim 10 , wherein outside air suction spaces are formed between said gas suction device and said spinning tube, to ensure that the sucked outside air flows into said filament passage.  
   
   
       15 . An apparatus for producing a yarn consisting of numerous filaments, having: 
 (a) a spinneret having numerous spinning holes formed to discharge a flowable polymer continuously for forming filaments,    (b) a spinning tube having a filament passage through which the numerous filaments formed by said numerous spinning holes run downward from said spinneret, and installed below and spaced from said spinneret,    (c) an oiling means for applying an oil to the numerous filaments coming out of said spinning tube,    (d) a filament take-up means for taking up the numerous filaments coming from said oiling means, and    (e) a winding means for winding the numerous filaments coming from said filament take-up means, characterized in that    (f) gas injection holes are provided, which inject gas obliquely downward from outside the numerous filaments entering the filament passage of said spinning tube, toward the numerous filaments, while the numerous filaments are still flowable, to ensure that the numerous filaments can be disposed along one straight line or one circle without overlapping each other, and further to ensure that, subsequently after disposing the numerous filaments, the injected gas can form a gas stream flowing downward together with the numerous filaments in the filament passage of said spinning tube, and    (g) a means is provided for adjusting the injection conditions of the gas injected from said gas injection holes or adjusting the take-up speed of the numerous filaments taken up by said filament take-up means, to ensure that the velocity of the gas stream flowing downward together with the numerous filaments in the filament passage of said spinning tube is not less than 60% of the take-up speed of the numerous filaments taken up by said filament take-up means.    
   
   
       16 . An apparatus for producing a yarn, according to  claim 15 , wherein said numerous filaments are disposed along one straight line; the cross sectional form of the filament passage of said spinning tube is rectangular; the direction of the long sides of said rectangle agrees with the direction of said straight line; and the following relation is satisfied:  
         d× 3≦ Ex≦d× 20  
     where Ex is the length of the short sides of said rectangle, and d is the diameter of said spinning holes.  
   
   
       17 . An apparatus for producing a yarn, according to  claim 16 , wherein said numerous spinning holes are arranged in straight lines; and the number of the straight lines is 3 or less.  
   
   
       18 . An apparatus for producing a yarn, according to  claim 15 , wherein the following relation is satisfied:  
         La≦Lg/ 2  
     where Lg is the-distance between said spinneret and the position at which said numerous filaments are solidified to lose their flowability and reach the take-up speed of the numerous filaments taken up by said filament take-up means, and La is the distance between said spinneret and the position at which the acceleration of said numerous filaments becomes largest.  
   
   
       19 . An apparatus for producing a yarn, according to  claim 18 , wherein the velocity of the gas stream flowing downward together with said numerous filaments in the filament passage of said spinning tube is higher than the running speed of said numerous filaments, in the range of the distance Lg between said spinneret and the position at which the running speed of the numerous filaments reaches the take-up speed of the numerous filaments taken up by said filament take-up means.  
   
   
       20 . An apparatus for producing a yarn, according to  claim 15 , wherein a gas suction and discharge means for sucking and discharging the gas existing around the numerous filaments running from said spinning holes toward said filament passage is installed between said spinneret and said spinning tube, to ensure that the gas existing around said numerous filaments can be sucked and discharged.  
   
   
       21 . An apparatus for producing a yarn, according to  claim 20 , wherein the numerous filaments are disposed along one straight line; the cross sectional form of the filament passage of said spinning tube is rectangular; the direction of the long sides of said rectangle agrees with the direction of said straight line; and the following relation is satisfied:  
         Ex≦ 10 mm  
     where Ex is the length of the short sides of said rectangle.  
   
   
       22 . An apparatus for producing a yarn consisting of numerous filaments, having: 
 (a) a spinneret having numerous spinning holes formed to discharge a flowable polymer continuously for forming filaments,    (b) a spinning tube having a filament passage through which the numerous filaments formed by said numerous spinning holes run downward from said spinneret, and installed below and spaced from said spinneret,    (c) an oiling means for applying an oil to the numerous filaments coming out of said spinning tube,    (d) a filament take-up means for taking up the numerous filaments coming from said oiling means, and    (e) a winding means for winding the numerous filaments coming from said filament take-up means, characterized in that    (f) gas injection holes are provided, which inject gas obliquely downward from outside the numerous filaments entering the filament passage of said spinning tube, toward the numerous filaments, while the numerous filaments are still flowable, to ensure that the numerous filaments can be disposed along one straight line or one circle without overlapping each other, and further to ensure that, subsequently after disposing the numerous filaments, the injected gas can form a gas stream flowing downward together with the numerous filaments in the filament passage of said spinning tube, and    (g) the following relation is satisfied:        La≦Lg/ 2    where Lg is the distance between said spinneret and the position at which said numerous filaments are solidified to lose their flowability and reach the take-up speed of the numerous filaments taken up by said filament take-up means, and La is the distance between said spinneret and the position at which the acceleration of said numerous filaments becomes largest.    
   
   
       23 . An apparatus for producing a yarn, according to  claim 22 , wherein the velocity of the gas stream flowing downward together with said numerous filaments in said filament passage is higher than the running speed of said numerous filaments.  
   
   
       24 . An apparatus for producing a yarn consisting of numerous filaments, having: 
 (a) a spinneret having numerous spinning holes formed to discharge a flowable polymer continuously for forming filaments,    (b) a spinning tube having a filament passage through which the numerous filaments formed by said numerous spinning holes run downward from said spinneret, and installed below and spaced from said spinneret,    (c) an oiling means for applying an oil to the numerous filaments coming out of said spinning tube,    (d) a filament take-up means for taking up the numerous filaments coming from said oiling means, and    (e) a winding means for winding the numerous filaments coming from said filament take-up means, characterized in that    (f) gas injection holes are provided, which inject gas obliquely downward from outside the numerous filaments entering the filament passage of said spinning tube, toward the numerous filaments, while the numerous filaments are still flowable, to ensure that the numerous filaments can be disposed along one straight line or one circle without overlapping each other, and further to ensure that, subsequently after disposing the numerous filaments, the injected gas can form a gas stream flowing downward together with the numerous filaments in the filament passage of said spinning tube, and    (g) a gas suction device is installed between said spinneret and said spinning tube, to suck the gas existing around said numerous filaments and to discharge the gas outside.    
   
   
       25 . An apparatus for producing a yarn, according to  claim 24 , wherein the width of said filament passage in the direction perpendicular to the direction in which said numerous filaments are disposed side by side is 10 mm or less.  
   
   
       26 . An apparatus for producing a yarn, according to  claim 24 , wherein the suction of the gas existing around said numerous filaments is carried out on both sides of the disposal of said numerous filaments.  
   
   
       27 . An apparatus for producing a yarn, according to  claim 24 , wherein said numerous spinning holes are arranged in straight lines; and the number of the straight lines is 3 or less.  
   
   
       28 . An apparatus for producing a yarn, according to  claim 24 , wherein outside air suction spaces are formed between said gas suction device and said spinning tube, to ensure that the sucked outside air flows into said filament passage.