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Different-shrinkage polyamide 6POY/FDY (Polyester Pre-Oriented Yarn/Fully Drawn Yarn) composite fiber and preparation method thereof

A technology of different shrinkage polyamide and composite fiber, which is applied in fiber treatment, conjugated synthetic polymer artificial filament, melt spinning, etc., to achieve the effect of stable quality, short process and large production capacity

Active Publication Date: 2014-09-10
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to solve the deficiencies in the preparation technology of different shrinkable polyamide 6POY / FDY composite fibers produced by the existing two-step method using the difference in thickness and fineness and orientation difference. Through the transformation and adjustment of the existing FDY production equipment Spinning process conditions, providing a short production process, stable product quality isoshrinkable polyamide 6POY / FDY composite fiber and its preparation method

Method used

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  • Different-shrinkage polyamide 6POY/FDY (Polyester Pre-Oriented Yarn/Fully Drawn Yarn) composite fiber and preparation method thereof
  • Different-shrinkage polyamide 6POY/FDY (Polyester Pre-Oriented Yarn/Fully Drawn Yarn) composite fiber and preparation method thereof
  • Different-shrinkage polyamide 6POY/FDY (Polyester Pre-Oriented Yarn/Fully Drawn Yarn) composite fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] This example provides a 110dtex / 96f (including: 43dtex / 48f fully drawn yarn, 67dtex / 48f pre-oriented yarn) one-step ultra-high polyisotropic shrinkage polyamide 6POY / FDY composite fiber and its preparation method, and its process flow See attached figure 1 . The production process is as follows:

[0022] The polyamide 6 dry chips that meet the requirements of the spinning process index are input into the screw, heated, melted and filtered, and then enter the spinning box. The spinning melt is extruded from the micropores of two metering pumps, spinning components and two spinnerets. One bundle of filaments is cooled and solidified by surrounding air blowing, oiled on the nozzle, pre-networked, stretched and heat-set between the first drafting roll and the second drafting hot roll, and then fed into the third godet to obtain a poly Amide 6FDY; another bundle of filaments is solidified and formed by slow cooling and ring blowing cooling, nozzle oiling, guide wire windin...

Embodiment 2

[0028] This example provides a 136dtex / 96f (including: 43dtex / 48f fully drawn yarn, 93dtex / 48f pre-oriented yarn) method for preparing ultra-high polyisotropic shrinkable polyamide 6POY / FDY composite fibers in one step. For the process flow, see attached figure 1 . The production process is as follows:

[0029]The polyamide 6 dry chips that meet the requirements of the spinning process index are input into the screw, heated, melted and filtered, and then enter the spinning box. The spinning melt is extruded from the micropores of two metering pumps, spinning components and two spinnerets. One bundle of filaments is cooled and solidified by circular air blowing, oiled on the nozzle, pre-networked, stretched and heat-set between the first drafting roll and the second drafting hot roll, and then input into the third godet to obtain a poly Amide 6FDY; another bundle of filaments is cooled and solidified by slow cooling and circular air blowing, the nozzle is oiled, and the guide...

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Abstract

The invention relates to a different-shrinkage polyamide 6POY / FDY (Polyester Pre-Oriented Yarn / Fully Drawn Yarn) composite fiber and a preparation method thereof. The preparation method comprises the following steps: arranging adopting double measuring pumps which respectively correspond to two sets of spinning components and two spinneret plates, extruding melt from micropores of the two spinneret plates respectively to form two bundles of yarns, cooling one bundle of yarn through annular air blowing to be cured and formed, coating with oil through nozzles, prefabricating into grids, performing stretching and performing thermal-forming between a first traction roller and a second traction roller, and further inputting into a third yarn guide disc, so as to obtain FDYs; cooling the other bundle of yarns through slow cooling and annular air blowing to be cured and formed, coating with the oil through the nozzles, and guiding to a winding device, so as to obtain 6POYs; and simultaneously inputting the FDYs and the 6POYs into a yarn combiner and the nozzles to be compounded, and further performing a winding forming process, so as to prepare the different-shrinkage polyamide 6POY / FDY composite fiber of which the boiling water different shrinkage rate can be up to 50-65%. Under the action of heat, the composite fiber has a relatively large ultrahigh multi-different shrinkage characteristic and a shape memory function, and also has a capillary wicking effect formed by fiber groups.

Description

technical field [0001] The invention relates to a different-shrinkage polyamide 6 POY / FDY composite fiber and a preparation method thereof, in particular to a one-step method for preparing a different-shrinkage polyamide 6 POY / FDY composite fiber, which belongs to the technical field of chemical fibers. Background technique [0002] The ultra-high polyisotropic shrinkage polyamide 6POY / FDY composite fiber is caused by the differential thermal shrinkage caused by the different disorientation of the non-crystalline orientation region in the high-order structure of different fibers after heating. At present, the different shrinkable polyamide 6 POY / FDY composite fibers and technologies prepared in the domestic and foreign markets mainly adopt stretching conditions adjusted or stretched at low temperature and low magnification to prepare polyamide 6 pre-oriented yarns (POY), fully drawn yarns, respectively. Filament stretching (FDY), and then POY and FDY are processed in a two-s...

Claims

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Application Information

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IPC IPC(8): D01F8/12D01D5/08D01D5/088D01D5/096
Inventor 管新海席丽媛张其锋朱新生胡德宝
Owner SUZHOU UNIV
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