Parallel self-crimping POY-DT silk elastic fiber and preparation method thereof

A technology of POY-DT and elastic fiber, which is applied in the field of polyester fiber and can solve problems such as uneven strips

Pending Publication Date: 2020-04-14
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a side-by-side self-crimping POY-DT silk elastic fiber and its preparation method, aiming to solve the random "strip-like unevenness" that occurs when PBT / PET side-by-side composite fibers are applied to knitted fabric products in the prior art The problem

Method used

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  • Parallel self-crimping POY-DT silk elastic fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of preparation method of juxtaposing self-crimping POY-DT silk elastic fiber, press POY-DT process, be the PET melt (intrinsic viscosity is 0.5dL / g) and PBT melt (intrinsic viscosity is 0.5dL / g) and PBT melt (intrinsic viscosity is 1.16dL / g) after dispensing, extrude from the spinneret m (round) and spinneret n (round) on the same spinneret to make POY-DT filaments and then perform relaxation heat treatment to obtain parallel self-curling POY-DT silk elastic fiber;

[0045] The distribution refers to distributing the PBT melt through the distribution hole A, while distributing the PET melt through the distribution hole B to the spinneret m; distributing the PBT melt through the distribution hole C, and simultaneously distributing the PET melt through the distribution hole D In the spinneret hole n; at the entrance of distribution hole A, distribution hole B, distribution hole C and distribution hole D, the apparent viscosity difference of PET melt and PBT melt is...

Embodiment 2

[0054]A kind of preparation method of juxtaposing self-crimping POY-DT silk elastic fiber, press POY-DT process, be the PET melt (intrinsic viscosity is 0.5dL / g) and PBT melt (intrinsic viscosity is 0.5dL / g) and PBT melt (intrinsic viscosity is 1.17dL / g) after distribution, extrude from the spinneret m (round) and spinneret n (round) on the same spinneret to make POY-DT filaments and then perform relaxation heat treatment to obtain parallel self-curling POY-DT silk elastic fiber;

[0055] The distribution refers to distributing the PBT melt through the distribution hole A, while distributing the PET melt through the distribution hole B to the spinneret m; distributing the PBT melt through the distribution hole C, and simultaneously distributing the PET melt through the distribution hole D In the spinneret hole n; at the entrance of distribution hole A, distribution hole B, distribution hole C and distribution hole D, the apparent viscosity difference of PET melt and PBT melt i...

Embodiment 3

[0064] A kind of preparation method of juxtaposing self-crimping POY-DT filament elastic fiber, press POY-DT process, be the PET melt (intrinsic viscosity is 0.53dL / g) and PBT melt (intrinsic viscosity is 0.53dL / g) and PBT melt (intrinsic viscosity is 1.19dL / g) after distribution, extrude from the spinneret m (round) and spinneret n (round) on the same spinneret to make POY-DT filaments and then perform relaxation heat treatment to obtain parallel self-curling POY-DT silk elastic fiber;

[0065] The distribution refers to distributing the PBT melt through the distribution hole A, while distributing the PET melt through the distribution hole B to the spinneret m; distributing the PBT melt through the distribution hole C, and simultaneously distributing the PET melt through the distribution hole D In the spinneret hole n; at the inlets of distribution hole A, distribution hole B, distribution hole C and distribution hole D, the apparent viscosity difference of PET melt and PBT m...

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Abstract

The invention relates to a parallel self-crimping POY-DT silk elastic fiber and a preparation method thereof. PET melt and PBT melt are distributed according to a POY-DT process, then the PET melt andthe PBT melt are extruded from spinneret orifices m and n on the same spinneret plate to prepare POY-DT silk and relaxation heat treatment is carried out to prepare the parallel self-crimping POY-DTsilk elastic fiber, wherein the PET melt and the PET melt flow to the spinneret orifice m through distribution orifices A and B and flow to the spinneret orifice n through distribution orifices C andD, the apparent viscosity difference of the PET melt and the PBT melt is less than or equal to 5% at the inlet of each distribution orifice, the distribution orifices A and B are cylindrical orificeswith equal heights, the diameter ratio is 1.15-1.24: 1, the distribution orifices C and D are cylindrical orifices with equal heights, and the diameter ratio is 1: 1.15-1.24; the prepared fiber consists of a plurality of PBT / PET parallel composite monofilaments with two mixture ratios, and the crimping directions of the monofilaments in the fiber are randomly distributed. The parallel self-crimping POY-DT silk elastic fiber and the preparation method thereof in the invention solve the problem of uneven stripe shade of the PBT / PET parallel composite fiber in the knitted fabric.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a juxtaposed self-crimping POY-DT silk elastic fiber and a preparation method thereof. Background technique [0002] Generally speaking, the surface of chemical fibers is relatively smooth, without crimps, the gaps between fibers are small, and the bulkiness and fullness of the products are poor. Physical or chemical methods are usually used to make the fibers have certain curls, but such curls are often not durable enough, and Curl is low. Composite fibers are different from ordinary single-component chemical fibers. There are two components with different properties such as shrinkage law and modulus in the cross-section. Due to the difference in the stress-strain behavior of the two polymers distributed on both sides, the fibers are curled. , this crimp is not produced by heat setting performance, it is the characteristic of the composite fiber itself, called self-crimp...

Claims

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Application Information

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IPC IPC(8): D01D5/32D01D5/23D01D5/08D01F8/14
CPCD01D5/08D01D5/23D01D5/32D01F8/14
Inventor 范红卫汤方明王山水沈建根孙晓华
Owner JIANGSU HENGLI CHEM FIBER
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