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Pet/modified pet two-component elastic yarn and preparation method thereof

A PET-PA6, two-component technology, which is applied in the field of polyester fiber, can solve the problems of uneven stripes and other problems, and achieve the effect of good comprehensive performance and wide application range

Active Publication Date: 2022-03-18
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a PET / modified PET two-component elastic yarn and its preparation method. "The problem

Method used

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  • Pet/modified pet two-component elastic yarn and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of PET / modified PET two-component elastic yarn, its preparation process is as follows:

[0041] (1) PET / modified PET two-component elastic yarn is extruded on the same spinneret; specifically:

[0042] Divide PET melt (intrinsic viscosity 0.5dL / g) into two paths: one path is directly extruded after distribution; the other path is mixed with PET-PA6 copolymer melt (intrinsic viscosity 0.65dL / g, The mass ratio of PET melt is 50:50) is extruded after distributing by side-by-side compound spinning mode together;

[0043] The ratio of the number of spinneret holes m (round) that are directly extruded and flowed through to the number of spinneret holes n (round) that are extruded and flowed through after being distributed in a parallel composite spinning mode is 1:7; The ratio of the equivalent diameter of the spinneret m to the spinneret n is 1:1; all the spinneret holes are distributed in concentric circles, the spinneret holes on the same circle are...

Embodiment 2

[0050] The preparation method of PET / modified PET two-component elastic yarn, its preparation process is as follows:

[0051] (1) PET / modified PET two-component elastic yarn is extruded on the same spinneret; specifically:

[0052] Divide the PET melt (with an intrinsic viscosity of 0.56dL / g) into two paths: one path is directly extruded after distribution; The mass ratio of PET melt is 50:50) is extruded after distributing by side-by-side compound spinning mode together;

[0053] The ratio of the number of spinneret holes m (elliptic) that are directly extruded and flowed through to the number of spinneret holes n (circular) that are extruded and flowed through after being distributed in a parallel composite spinning mode is 1:6; The ratio of the equivalent diameter of the spinneret m to the spinneret n is 1:1; all the spinneret holes are distributed in concentric circles, the spinneret holes on the same circle are all m or all are n, and the number of spinneret holes on the...

Embodiment 3

[0060] The preparation method of PET / modified PET two-component elastic yarn, its preparation process is as follows:

[0061] (1) PET / modified PET two-component elastic yarn is extruded on the same spinneret; specifically:

[0062]Divide PET melt (intrinsic viscosity 0.58dL / g) into two paths: one path is directly extruded after distribution; the other path is mixed with PET-PA6 copolymer melt (intrinsic viscosity 0.63dL / g, The mass ratio of PET melt is 50:50) is extruded after distributing by side-by-side compound spinning mode together;

[0063] The ratio of the number of spinneret holes m (triangles) that are directly extruded and flowed through to the number of spinneret holes n (circular) that are extruded and flowed through after being distributed in a parallel composite spinning mode is 1:7; The ratio of the equivalent diameter of the hole m to the spinneret hole n is 1:1; all the spinneret holes are distributed in concentric circles, the spinneret holes on the same cir...

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Abstract

The invention relates to a PET / modified PET two-component elastic yarn and a preparation method thereof. The preparation method is as follows: the PET / modified PET two-component elastic yarn is extruded on the same spinneret, and the PET melt is divided into two Road: one road is directly extruded after being distributed, and the other road is distributed and extruded together with the PET-PA6 copolymer melt in a parallel composite spinning method, and the spinneret hole m that flows through the direct extrusion is distributed in a parallel composite spinning method After extrusion, the ratio of the number of spinneret holes n flowing through is 1:6~7. After extrusion, PET / modified PET two-component elastic yarn is obtained according to the FDY process; the prepared two-component elastic yarn is made of PET Monofilaments and PET / PET-PA6 copolymers are composed of side-by-side composite monofilaments, and the curling directions of the monofilaments are randomly distributed. The invention effectively solves the problem of "striped unevenness" formed by PET / PET-PA6 copolymer side-by-side composite fibers in knitted fabrics.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a PET / modified PET two-component elastic yarn and a preparation method thereof. Background technique [0002] Curl is an important indicator of fibers, affecting the textile processing and final product characteristics and application performance. [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 spiral crimp for a wool fiber-like curl. The crimping of this kind of fiber does not require the deformation processing of ordinary thermoplastic fibers when they are crimped, and avoids the thermal damage of chemical fibers, so it is usually called "self-crimping fiber", also known as three-dimensional crimping fiber. Long-lasting stab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/32D01D5/22D01D5/253D01D4/02D01D10/02D01F8/14D01F8/12
CPCD01D5/32D01D5/22D01D5/253D01D4/02D01D10/02D01F8/14D01F8/12D10B2331/04D10B2331/02D10B2401/061
Inventor 王山水范红卫汤方明魏存宏
Owner JIANGSU HENGLI CHEM FIBER