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PTT short fiber with hydrophilicity and its production method

A kind of technology of polytrimethylene terephthalate and its production method, which is applied in the direction of melt spinning, conjugated synthetic polymer artificial filament, heat treatment of artificial filament, etc., can solve the problems of poor hygroscopicity of synthetic fibers, etc., and achieve the goal of overcoming the poor hygroscopicity , Make up for the effect of weak hydrophilicity and soft hand feeling

Inactive Publication Date: 2008-05-28
QUANZHOU HAITIAN MATERIAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But every fiber has its defects, PTT fiber is no exception
Although its equilibrium moisture regain is higher than that of polyester, it still cannot get rid of the characteristics of poor hygroscopicity of synthetic fibers

Method used

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  • PTT short fiber with hydrophilicity and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: 1.4D×38mm hydrophilic PTT staple fiber

[0035] 1,800 kg of conventional PTT chips and 200 kg of modified PTT polyester chips are dried to remove moisture. PTT chips are continuously dried by pulsating bed pre-crystallization. The drying time is 6-10 hours, and the moisture content of the slices after drying is controlled below 20ppm; the modified PTT slices are continuously dried by fluidized bed pre-crystallization, the drying hot air temperature is 140°C, the wind pressure is 0.1MPa, and the dew point temperature is ≤ -70°C. The drying time is 8-12 hours, and the moisture content of the slices after drying is controlled below 30ppm. Afterwards, the dried PTT slices and modified PTT slices enter the mixing bin according to the above weight ratio, fully mixed and stirred in the mixing bin, and enter the same screw extruder for heating. The screw extruder is divided into five zones for temperature control. The temperature is 235-240°C, the temperature in the...

Embodiment 2

[0049] Example 2: 2.5D×56mm hydrophilic PTT staple fiber

[0050] 1,600 kg of conventional PTT chips and 400 kg of modified PTT polyester chips are dried to remove moisture. PTT chips are continuously dried by pulsating bed pre-crystallization. The drying time is 8 hours, and the moisture content of the slices after drying is controlled below 20ppm; the modified PTT slices are continuously dried by fluidized bed pre-crystallization, the drying hot air temperature is 140°C, the wind pressure is 0.1MPa, the dew point temperature is ≤ -70°C, and the drying time For 10 hours, the moisture content of the slices after drying is controlled below 30ppm. Afterwards, the dried PTT slices and modified PTT slices enter the mixing bin in the above weight ratio, fully mixed and stirred in the mixing bin, and enter the same screw extruder for heating. The screw extruder is divided into five zones for temperature control. 235-240°C, the temperature in the second zone is 240-255°C, the temper...

Embodiment 3

[0064] Example 3: 3.0D×30-70mm hydrophilic PTT staple fiber

[0065] 1,500 kg of conventional PTT chips and 300 kg of modified PTT polyester chips are dried to remove moisture. PTT chips are continuously dried by pulsating bed pre-crystallization. The drying time is 10 hours, and the moisture content of the slices after drying is controlled below 20ppm; the modified PTT slices are continuously dried by fluidized bed pre-crystallization, the drying hot air temperature is 130°C, the wind pressure is 0.15MPa, the dew point temperature is ≤ -70°C, and the drying time For 12 hours, the moisture content of the slices after drying is controlled below 30ppm. Afterwards, the dried PTT slices and modified PTT slices enter the mixing bin in the above weight ratio, fully mixed and stirred in the mixing bin, and enter the same screw extruder for heating. The screw extruder is divided into five zones for temperature control. 235-240°C, the temperature in the second zone is 240-255°C, the t...

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Abstract

The invention discloses a polytrimethylene terephthalate short fiber which has a hydrophilicity and process for preparing, which besides comprises conventional polytrimethylene terephthalate, further comprises modified polytrimethylene terephthalate, which is polytrimethylene terephthalate based polymers with hydrophilic radical, whose melting point is 210-230 DGE C, and the weight of modified polytrimethylene terephthalate component accounts for 10-30 percent of the total weight of composite fiber. In the invention, strong water absorption groups are introduced into polytrimethylene terephthalate polymer during a polymerization process, and then modified polytrimethylene terephthalate polymer with the hydrophilic radical and conventional polytrimethylene terephthalate polymer are blend-spun, thereby obtaining blend fibers which improve the hydrophilic property of common polytrimethylene terephthalate fiber, and making up the defect that the hydrophilic property of the polytrimethylene terephthalate fiber is not strong. The hand feeling of the fiber of the invention is soft, the fiber is capable of being stained with fresh color in a low temperature, and overcoming the characteristics that the hygroscopicity of the composite fiber is poor.

Description

1. Technical field [0001] The present invention relates to a kind of polytrimethylene terephthalate short fiber and its production method, more particularly to a kind of hydrophilic polytrimethylene terephthalate short fiber and its production method. 2. Background technology [0002] The full name of PTT is polytrimethylene terephthalate. As a brand new polyester material, it is one of the latest new chemical fiber materials in the world. [0003] Due to the special molecular structure of polytrimethylene terephthalate (PTT), its low modulus and excellent elastic recovery rate make the PTT fabric have a unique soft feel, fluffy and elastic properties. The PTT macromolecular chain has a helical structure, which makes PTT have good resilience. Due to the special structural form of the molecular chain, it endows PTT with excellent resilience performance through the mutual action of the molecular chain itself and the molecular chains. [0004] The volume specific resistance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01D5/08D01D10/02D01D10/06
Inventor 张连京王启明
Owner QUANZHOU HAITIAN MATERIAL TECH CORP