High-elasticity hollow wool type continuous polyester fiber preparing method
A technology of polyester long fiber and manufacturing method, applied in fiber processing, conjugated synthetic polymer rayon, filament/thread forming, etc., can solve problems such as gaps, and achieve the effect of good elasticity and plump appearance
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Embodiment 1
[0020] The manufacture method of the high-elastic hollow wool type polyester long fiber, the intrinsic viscosity of the PET selected is 0.675dl / g, and the melting point is 258°C, the intrinsic viscosity of PTT is 0.920dl / g, and the melting point is 229°C, the steps include:
[0021] a. PET slices enter the screw extruder, extruded and melted, and then conveyed. The conveying temperature is 280°C, and the conveying pressure is 4.5Mpa. It enters the melt cooler through the booster pump, reduces and controls the melt temperature to 278°C, and enters the spinning machine. wire box;
[0022] b. PTT slices enter another screw extruder, and filter out impurities after extrusion and melting. The extrusion temperature is 230°C, the extrusion pressure is 3.0Mpa, and then quantitatively extruded to the spinning box to make the volume ratio of PET to PTT stay at 55:45;
[0023] c. The PET melt and the PTT melt are conveyed into the same spinning assembly, pass through the channel plate a...
Embodiment 2
[0027] The manufacture method of this highly elastic hollow wool type polyester long fiber, its step comprises:
[0028] a. PET slices enter the screw extruder, extruded and melted, and conveyed. The conveying temperature is 282°C, and the conveying pressure is 5Mpa. It enters the melt cooler through the booster pump, reduces and controls the melt temperature to 280°C, and enters the spinning process. box;
[0029] b. PTT slices enter another screw extruder, and filter out impurities after extrusion and melting. The extrusion temperature is 245°C, the extrusion pressure is 3.5Mpa, and then quantitatively extruded to the spinning box to make the volume ratio of PET and PTT Keep it at 50:50;
[0030] c. The PET melt and the PTT melt are conveyed into the same spinning assembly, pass through the channel plate and the distribution plate in the assembly respectively, meet at the entrance of each spinneret hole of the spinneret, and are sprayed out through the spinneret. The tempe...
Embodiment 3
[0034] The manufacture method of this highly elastic hollow wool type polyester long fiber, its step comprises:
[0035] a. PET slices enter the screw extruder, extruded and melted, and then conveyed. The conveying temperature is 286°C, and the conveying pressure is 5.5Mpa. It enters the melt cooler through the booster pump, reduces and controls the melt temperature to 282°C, and enters the spinning machine. wire box;
[0036] b. PTT slices enter another screw extruder, and filter out impurities after extrusion and melting. The extrusion temperature is 260°C, the extrusion pressure is 4.0Mpa, and then quantitatively extruded to the spinning box to make the volume ratio of PET to PTT stay at 45:55;
[0037] c. The PET melt and the PTT melt are conveyed into the same spinning assembly, pass through the channel plate and the distribution plate in the assembly respectively, meet at the entrance of each spinneret hole of the spinneret, and are sprayed out through the spinneret. T...
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