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PTT/PET double-component elastic yarn and preparation method thereof

An elastic yarn, two-component technology, applied in the field of polyester fiber, can solve the problem of uneven stripes

Active Publication Date: 2020-04-10
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a PTT / PET two-component elastic yarn and its preparation method, with the purpose of solving the problem of random "strip-like unevenness" when PTT / PET side-by-side composite fibers are applied to knitted fabric products in the prior art. question

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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  • PTT/PET double-component elastic yarn and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0046] A kind of preparation method of PTT / PET two-component elastic yarn, according to FDY process, the PET melt (intrinsic viscosity is 0.52dL / g) and PTT melt (intrinsic viscosity is 1.2dL / g) that the mass ratio is 50:50 g) After distribution, extrude from the spinneret m (round) and spinneret n (round) on the same spinneret to make FDY filaments and then perform relaxation heat treatment to obtain PTT / PET two-component elastic filaments ;

[0047] The distribution refers to distributing the PTT melt through the distribution hole A, and at the same time distributing the PET melt through the distribution hole B to the spinneret m; distributing the PTT 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 of PET melt and PTT melt differs by 5%; distribution hole A a...

Embodiment 2

[0055]A kind of preparation method of PTT / PET two-component elastic yarn, according to FDY process, the PET melt (intrinsic viscosity is 0.56dL / g) and PTT melt (intrinsic viscosity is 1.13dL / g) that the mass ratio is 50:50 g) After distribution, extrude from the spinneret m (ellipse) and spinneret n (round) on the same spinneret to make FDY filaments and then perform relaxation heat treatment to obtain PTT / PET two-component elastic filaments ;

[0056] The distribution refers to distributing the PTT melt through the distribution hole A, and at the same time distributing the PET melt through the distribution hole B to the spinneret m; distributing the PTT 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 PTT melt is 3.6%; distribution h...

Embodiment 3

[0064] A kind of preparation method of PTT / PET two-component elastic yarn, according to FDY process, the PET melt (intrinsic viscosity is 0.58dL / g) and PTT melt (intrinsic viscosity is 1.17dL / g) that the mass ratio is 50:50 g) After distribution, extrude from the spinneret m (round) and spinneret n (round) on the same spinneret to make FDY filaments and then perform relaxation heat treatment to obtain PTT / PET two-component elastic filaments ;

[0065] The distribution refers to distributing the PTT melt through the distribution hole A, and at the same time distributing the PET melt through the distribution hole B to the spinneret m; distributing the PTT 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 PTT melt is 3.2%; distribution ho...

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Abstract

The present invention relates to a PTT / PET double-component elastic yarn and a preparation method thereof. PET and PTT melts were dispensed according to an FDY process, and FDY yarns are manufacturedby extruding from spinneret holes m and n in the same spinneret plate to be subjected to relaxation heat treatment, wherein the PTT and PET melts are dispensed through dispensing holes A and B to flowto the spinneret hole m and then are dispensed through dispensing holes C and D to flow to the spinneret hole n; in the inlets of the dispensing holes A, B, C and D, the apparent viscosity of the PETmelt and the PTT melt are not greater than 5%; the dispensing holes A and B are cylinder holes of the same heights and have the diameter ratio of 1.24 to 1; the dispensing holes C and D are cylinderholes of the same heights and have the diameter ratio of 1 to 1.24; and the prepared double-component elastic yarn is composed of a plurality of PTT / PET side-by-side composite monofilaments of different ratios, and the single-filament curling directions of the double-component elastic yarn are randomly distributed. The PTT / PET double-component elastic yarn fabric does not have the problem of uneven strip shapes.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a PTT / PET two-component elastic yarn 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-crimping. [0003] T...

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): D01D5/32D02G1/20D01F8/14
CPCD01D5/32D01F8/14D02G1/20D10B2401/061
Inventor 汤方明范红卫尹立新王山水王丽丽
Owner JIANGSU HENGLI CHEM FIBER
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