Device for manufacturing polyethylene terephthalate melt blown fiber web and manufacturing method using the same

Abstract

There is provided a device for manufacturing a PET melt blown fiber web further including a heat treatment machine that presses and heat-treats a PET melt blown fiber web formed on a forming table, wherein the heat treatment machine includes a porous pressure belt that presses the PET melt blown fiber web toward the forming table and transfers the PET melt blown fiber web to the winder side together with a porous circulation belt of the forming table, a hot air supply chamber that supplies high-temperature hot air to the PET melt blown fiber web to crystallize the PET melt blown fiber web that is pressed and transferred by the porous pressure belt, and a height control means that controls the height of the porous pressure belt for pressing the PET melt blown fiber web.

What is claimed is: 
     
         1 . A device for manufacturing a PET melt blown fiber web comprising:
 an extruder that melts and extrudes a PET resin; a die that receives a molten resin extruded from the extruder to spin an ultra-fined PET melt blown fiber in a self-weight direction; a forming table that is provided to be spaced below the die to collect and aggregate the PET melt blown fiber and to form a PET melt blown fiber web; a winder that winds the PET melt blown fiber web; and a blending nozzle for blending a PET short fiber to the PET melt blown fiber spun toward the forming table,   wherein the device for manufacturing the PET melt blown fiber web comprises:   a heat treatment machine that presses and heat-treats the PET melt blown fiber web formed on the forming table,   wherein the heat treatment machine comprises:   a porous pressure belt that presses the PET melt blown fiber web toward the forming table and transfers the PET melt blown fiber web to the winder side together with a porous circulation belt of the forming table;   a hot air supply chamber that supplies high-temperature hot air to the PET melt blown fiber web to crystallize the PET melt blown fiber web that is pressed and transferred by the porous pressure belt; and   a height control means that controls the height of the porous pressure belt for pressing the PET melt blown fiber web.   
     
     
         2 . The device for manufacturing the PET melt blown fiber web of  claim 1 , wherein the porous pressure belt is provided as a belt in the form of a mesh net, and
 the porous pressure belt is circulated and rotatably provided on carrier rollers rotatably provided between a pair of belt frames and a drive roller of a belt drive motor,   wherein the porous pressure belt passing through the lower end of the belt frame is provided to horizontally pass through the carrier rollers provided on both sides of the lower end of the belt frame lower than the lower end of the belt frame to transfer the PET melt blown fiber web to the winder side together with the porous circulation belt while pressing the surface of the PET melt blown fiber web to the porous circulation belt.   
     
     
         3 . The device for manufacturing the PET melt blown fiber web of  claim 2 , wherein the hot air supply chamber is provided between the belt frames so as not to interfere with the porous pressure belt, and filled with hot air blown from a hot air furnace provided outside the heat treatment machine, and
 in the lower portion of the hot air supply chamber, a plurality of hot air spray nozzles for spraying the hot air to the PET melt blown fiber web is formed.   
     
     
         4 . The device for manufacturing the PET melt blown fiber web of  claim 2 , wherein at least one height control means is provided on a height control frame fixedly provided to be spaced apart from the upper side of the porous pressure belt,
 wherein the height control means comprises   a height control servomotor provided on a gear box provided on the upper surface of the height control frame; and   an elevation bar that interlocks with the height control servomotor to elevate the porous pressure belt.   
     
     
         5 . The device for manufacturing the PET melt blown fiber web of  claim 4 , wherein a pinion gear is provided on an output shaft that rotates by the operation of the height control servomotor,
 the elevation bar is provided in the gear box to be elevatable, wherein the lower end of the elevation bar passes through the height control frame to connect onto an outer surface of the belt frame, and   a rack gear engaging with the pinion gear is formed on the elevation bar to extend along a longitudinal direction of the elevation bar.   
     
     
         6 . A manufacturing method of a PET melt blown fiber web using the device for manufacturing the PET melt blown fiber web of  claim 1 , comprising:
 a PET melt blown fiber spinning step of melting and spinning a PET raw material by a melt-blown method to form the PET melt-blown fiber;   a PET melt blown fiber web forming step of collecting and aggregating the PET melt blown fiber seated on the porous circulation belt to form the PET melt blown fiber web; and   a PET melt blown fiber web pressing and heat-treating step of supplying high-temperature hot air while pressing the PET melt blown fiber web to crystallize the PET melt blown fiber web.   
     
     
         7 . The manufacturing method of the PET melt blown fiber web of  claim 6 , wherein in the PET melt blown fiber spinning step,
 the PET melt blown fiber is spun at a temperature of 270 to 330° C. at 25 to 60 m 3 /min and spun to have a diameter of 2 to 10 μm.   
     
     
         8 . The manufacturing method of the PET melt blown fiber web of  claim 6 , wherein in the PET melt blown fiber spinning step,
 a PET short fiber having a diameter of 15 to 40 um is blended with the spun PET melt blown fiber,   wherein the PET short fiber is blended with the PET melt blown fiber in a 3:7 ratio.   
     
     
         9 . The manufacturing method of the PET melt blown fiber web of  claim 6 , wherein in the PET melt blown fiber web forming step,
 the porous circulation belt is transferred at a rate of 1 to 10 m/min, and   the PET melt blown fiber web having a weight of 100 to 700 g/m 2  is formed in the porous circulation belt.   
     
     
         10 . The manufacturing method of the PET melt blown fiber web of  claim 6 , wherein in the PET melt blown fiber web pressing and heat-treating step,
 the porous pressure belt circulates and rotates at a rate of 1 to 10 m/min, and circulates and rotates along the transfer direction of the PET melt blown fiber web, and   the hot air supply chamber sprays high-temperature hot air of 80 to 200°° C. at a rate of 1 to 10 m 3 /min through the hot air spray nozzles.   
     
     
         11 . The manufacturing method of the PET melt blown fiber web of  claim 10 , wherein in the PET melt blown fiber web pressing and heat-treating step,
 the porous pressure belt is spaced apart from the porous circulation belt at an interval of 1 to 150 mm and presses and transfers the PET melt blown fiber web.