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

Inactive Publication Date: 2015-06-17
JIANGSU JIANGNAN HIGH POLYMER FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of polyester synthesis technology and the rapid growth of output, the industrialization technology of imitation natural fiber tends to be mature. Although the above-mentioned synthesis and spinning technology of imitation natural wool is relatively close to natural fiber in terms of appearance and physical and mechanical properties, However, compared with the comprehensive performance of natural wool fiber, there is still a certain gap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a high-elasticity hollow wool type continuous polyester fiber preparing method. According to the method, PET and PTT are used as raw materials, and the fiber is obtained through direct spinning by means of the composite spinning technique. The weight proportion between PET and PTT is 45-55:55-45. The two-component parallel combination high-elasticity hollow wool type continuous polyester fiber obtained in this way has high elasticity different from that of conventional polyester fiber. The two polymers PET and PTT have similar chemical structures so that compatibility can be realized, and meanwhile, the chemical structures are different so that internal stress difference can be caused. High elasticity can be realized after special manufacturing. Due to intrinsic viscosity difference and melting point difference between the two high polymers, flowing property difference between two melts is caused, and the two components can be better combined by adopting high-temperature melting and conveyance and low-temperature spinning for PET and low-temperature melting and conveyance and high-temperature spinning for PTT during spinning.

Description

technical field [0001] The invention relates to a method for manufacturing high-elastic hollow wool polyester long fibers. Background technique [0002] Polyester fibers, especially polyethylene terephthalate (PET) staple fibers, have been used in the field of wool-like textiles since the 1980s. With the development of the textile processing industry, synthetic fibers are used in the production of wool-like textiles. The production and processing method is gradually developing from short-fiber yarn-making to the short-process direction of direct drawing and cutting of long-fiber tow to produce tops. [0003] The method of mechanical crimping is used to make synthetic fibers have longitudinal ripples, imitating the appearance of natural wool, and having some characteristics of imitating wool. Patent CN 103173889 A discloses wool-imitating polyester staple fiber and its preparation method. Compared with conventional PET production, it adopts The lower melt intrinsic viscosity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D13/00D01D5/30D01D5/253D01F8/14
Inventor 陶国平浦金龙
Owner JIANGSU JIANGNAN HIGH POLYMER FIBER
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