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Full-dull elastic yarn and preparation method thereof

A kind of elastic yarn, full extinction technology, applied in the field of polyester fiber, can solve the problem of uneven strip shape, and achieve the effect of maintaining excellent performance

Active Publication Date: 2020-05-08
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a kind of full-dull elastic yarn and its preparation method, aiming to solve the problem of random "strip-like unevenness" when full-dull PET / PBT side-by-side composite fibers are applied to knitted fabric products in the prior art
The present invention adopts the method of "replacing" a part of PET / PBT side-by-side composite monofilaments with PET monofilaments. Due to the different shrinkage and shape of PET / PBT side-by-side composite fibers, the formation of pure PET / PBT side-by-side composite fibers is broken. Neat left and right helical shape, and then solve the problem of "strip-like unevenness" in knitted fabrics made of PET / PBT side-by-side composite fibers

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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  • Full-dull elastic yarn and preparation method thereof
  • Full-dull elastic yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation method of full extinction elastic yarn, its process is as follows:

[0045] (1) The full-dull elastic yarn is extruded on the same spinneret, specifically:

[0046] PET melt (containing 2.9wt% TiO2) with intrinsic viscosity of 0.55dL / g 2 ) is split into two paths: one path is directly extruded after distribution; the other path is the PBT melt (containing 2.5wt% TiO2) with an intrinsic viscosity of 1.2dL / g 2 ) are extruded together after distribution according to the parallel composite spinning method;

[0047] The ratio of the number of spinneret holes m (hollow spinneret holes) that are directly extruded through to the number of spinneret holes n (circular spinneret holes) that are extruded through after being distributed in a parallel composite spinning manner 1:8;

[0048] The mass ratio of the PET melt passing through the spinneret n to the PBT melt is 50:50, and the ratio of the equivalent diameter of the spinneret m to the spinneret n is 1:1; ...

Embodiment 2

[0057] The preparation method of full extinction elastic yarn, its process is as follows:

[0058] (1) The full-dull elastic yarn is extruded on the same spinneret, specifically:

[0059] PET melt (containing 2.5wt% TiO 2 ) is split into two paths: one path is directly extruded after distribution; the other path is 1.16dL / g PBT melt (containing 2.5wt% TiO 2 ) are extruded together after distribution according to the parallel composite spinning mode;

[0060] The ratio of the number of spinneret holes m (hollow spinneret holes) that are directly extruded through to the number of spinneret holes n (circular spinneret holes) that are extruded through after being distributed in a parallel composite spinning manner 1:5;

[0061] The mass ratio of the PET melt passing through the spinneret n to the PBT melt is 50:50, and the ratio of the equivalent diameter of the spinneret m to the spinneret n is 1:1;

[0062] The outer edge of the cross-section of the hollow spinneret hole is ...

Embodiment 3

[0070] The preparation method of full extinction elastic yarn, its process is as follows:

[0071] (1) The full-dull elastic yarn is extruded on the same spinneret, specifically:

[0072] A PET melt with an intrinsic viscosity of 0.6dL / g (containing 2.5wt% TiO 2 ) is split into two paths: one path is directly extruded after distribution; the other path is 1.19dL / g PBT melt (containing 2.6wt% TiO 2 ) are extruded together after distribution according to the parallel composite spinning method;

[0073] The ratio of the number of spinneret holes m (hollow spinneret holes) that are directly extruded through to the number of spinneret holes n (circular spinneret holes) that are extruded through after being distributed in a parallel composite spinning manner 1:8;

[0074] The mass ratio of the PET melt passing through the spinneret n to the PBT melt is 50:50, and the ratio of the equivalent diameter of the spinneret m to the spinneret n is 1:1;

[0075] The outer edge of the cro...

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Abstract

The present invention relates to a full-dull elastic yarn and a preparation method thereof. The full-dull elastic yarn is extruded on a same spinneret plate; a PET melt is split into two flows, one flow is directly extruded after being distributed, and the other flow and a PBT melt are together extruded in a parallel composite spinning mode after the other flow is distributed; each of the PET meltand the PBT melt contains 2.5-3.0wt% of TiO2; the number ratio of spinneret holes m through which one flow of the PET melt is directly extruded to spinneret holes n through which the other flow of the PET melt and the PBT melt are extruded in the parallel composite spinning mode after the other flow is distributed is 1:(5-8); the spinneret holes m are hollow spinneret holes, and the spinneret holes n are circular spinneret holes; and FDY is prepared according to an FDY technology after extrusion, and then slack heat treatment is performed to obtain the full-dull elastic yarn. The crimping directions of monofilaments in the prepared full-dull elastic yarn are in random distribution. The problem of strip unevenness of a knitted fabric prepared from PET / PBT parallel bicomponent full-dull composite fibers is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a full-dull elastic yarn and a preparation method thereof. Background technique [0002] Fiber is an important textile material. In modern life, its application is ubiquitous. The fiber surface has a high gloss and is not easy to pilling. It is widely used in clothing fabrics, clothing fabrics and other fields. With the continuous deepening of people's understanding of the superiority of fiber, the demand is increasing rapidly, and at the same time more and higher requirements are put forward for its function, and the research on extinction has been increasing in recent years. [0003] In the big family of two-component composite fibers, the side-by-side two-component composite fiber is an important member. It uses the difference in thermal shrinkage properties of the two components to make the fiber bend away from the fiber axis, showing a permanent Three-dimensional spi...

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): D01D1/06D01D5/22D01D5/24D01D5/32D01F1/08D01F1/10D01F8/14
CPCD01D5/32D01D5/24D01D5/22D01D1/065D01F8/14D01F1/10D01F1/08D10B2401/061Y02P70/62
Inventor 王山水沈建根范红卫汤方明杨超明
Owner JIANGSU HENGLI CHEM FIBER
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