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Core-skin type composite fiber and production method thereof

A composite fiber and production method technology, applied in fiber processing, filament forming processing, filament/thread forming, etc., can solve problems such as strength not as good as PET, poor shape retention, insufficient rigidity, etc., achieve soft hand feel, reduce energy Good effect of consumption and elastic recovery

Inactive Publication Date: 2008-04-09
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
Its strength is not as good as PET, and its stiffness is obviously not enough. Some PTT pure spinning fabrics feel too soft and have poor shape retention.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 55 kg of PTT polyester chips and 45 kg of PET polyester chips are dried to remove moisture. The PTT polyester chips are pre-crystallized in a fluidized bed and continuously dried. The drying hot air temperature is 140 ° C, the wind pressure is 0.1 Mpa, and the dew point temperature is ≤ -60 ° C , the drying time is 8-10 hours, and the moisture content of the chips after drying is controlled below 20ppm; the PET polyester chips are pre-crystallized and dried continuously in a common pulsating bed, the drying hot air temperature is 160°C, the wind pressure is 0.1Mpa, and the dew point temperature is ≤ -60 °C, the drying time is 4-6 hours, and the moisture content of the slices after drying is controlled below 25ppm. Then the dried PTT chips and PET chips are extruded and spun by their respective screw extruders. The PTT screw extruder is divided into five zones for temperature control. The temperature in the first zone is 235-240°C, and the temperature in the second zone i...

Embodiment 2

[0043] Dry 70 kg of PET polyester and 30 kg of PTT polyester chips to remove moisture. PTT polyester chips are pre-crystallized in a fluidized bed for continuous drying. The drying time is 9 hours, and the moisture content of the chips after drying is controlled below 20ppm; the PET polyester chips are pre-crystallized and dried continuously in a common pulsating bed, the drying hot air temperature is 160°C, the wind pressure is 0.1Mpa, and the dew point temperature is ≤ -60°C. The time is 5 hours, and the moisture content of the slices after drying is controlled below 25ppm. Then the dried PTT polyester chips and PET polyester chips are extruded and spun by their respective screw extruders. The PTT screw extruders are divided into five zones for temperature control. Zone temperature 240-255°C, zone three temperature 245-260°C, zone four temperature 255-265°C, zone five temperature 258-265°C; PET screw extruder is divided into five zones for temperature control, zone one tempera...

Embodiment 3

[0056] Dry 30 kg of PET polyester and 70 kg of PTT polyester chips to remove moisture. PTT polyester chips are pre-crystallized in a fluidized bed for continuous drying. The drying time is 10 hours, and the moisture content of the chips after drying is controlled below 20ppm; the PET polyester chips are pre-crystallized and dried continuously in a common pulsating bed, the drying hot air temperature is 160°C, the wind pressure is 0.1Mpa, and the dew point temperature The time is 6 hours, and the moisture content of the slices after drying is controlled below 25ppm. Then the dried PTT polyester chips and PET polyester chips are extruded and spun by their respective screw extruders. The PTT screw extruders are divided into five zones for temperature control. Zone temperature 240-255°C, zone three temperature 245-260°C, zone four temperature 255-265°C, zone five temperature 258-265°C; PET screw extruder is divided into five zones for temperature control, zone one temperature 268-...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses sheath-core complex fiber and a corresponding production method, wherein, sheath is PTT fiber while core is PET fiber and is fully enclosed in sheath, weight of which accounts for 30% to 70% of total weight of the complex fiber; a density range of finished fiber is 87dtex to 300dtex. The fiber of the invention combines the characteristics of polyester fiber and PTT fiber with proper strength and soft handle and can obtain bright color while dyeing in low temperature. The production cost of the fiber lies between PET fiber and PTT fiber and is lower than common PTT fiber.

Description

1. Technical field [0001] The invention relates to a skin-core composite fiber and a production method thereof, more particularly to a skin-core composite fiber with PET as a core layer and PTT as a skin layer and a production method thereof. 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, induced v...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/34D01D5/088D01D1/00D01F6/62
Inventor 张连京王启明魏征
Owner QUANZHOU HAITIAN MATERIAL TECH CORP
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