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One-step CDP/PET two-component composite filament and preparation method thereof

A two-component, composite yarn technology, applied in the field of polyester fiber, can solve problems such as unevenness of strips

Active Publication Date: 2020-05-05
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 one-step CDP / PET bicomponent composite yarn and its preparation method, the purpose is to solve the problem of CDP / PET side-by-side composite fiber used in knitting The problem of random "uneven bar shade" appears in the product

Method used

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  • One-step CDP/PET two-component composite filament and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation method of one-step method CDP / PET two-component composite silk, its process is as follows:

[0046] (1) According to the FDY process, after distributing the CDP melt (intrinsic viscosity 0.73dL / g) and PET melt (intrinsic viscosity 0.56dL / g) with a mass ratio of 50:50, from the same spinneret The spinneret hole m (round) and the spinneret n (round) are extruded into FDY filaments;

[0047] Among them, such as figure 1 As shown, the distribution means that the CDP melt is distributed through the distribution hole A, and the PET melt is distributed into the spinneret m through the distribution hole B at the same time, and the CDP melt is distributed through the distribution hole C, and the PET melt is distributed through the distribution hole C at the same time. Hole D is assigned to spinneret hole n;

[0048] Distribution hole A and distribution hole B are cylindrical holes of equal height, the ratio of the diameter of distribution hole A to distribution...

Embodiment 2

[0056] The preparation method of one-step method CDP / PET two-component composite silk, its process is as follows:

[0057] (1) According to the FDY process, after distributing the CDP melt (intrinsic viscosity 0.73dL / g) and PET melt (intrinsic viscosity 0.6dL / g) with a mass ratio of 50:50, from the same spinneret The spinneret hole m (round) and the spinneret n (round) are extruded into FDY filaments;

[0058] Wherein, the distribution refers to distributing the CDP melt through the distribution hole A, and simultaneously distributing the PET melt through the distribution hole B into the spinneret hole m, passing the CDP melt through the distribution hole C, and simultaneously distributing the PET melt through the distribution hole D is distributed to the spinneret hole n;

[0059]Distribution hole A and distribution hole B are cylindrical holes of equal height, the diameter ratio of distribution hole A to distribution hole B is 1.3:1, distribution hole C and distribution hol...

Embodiment 3

[0067] The preparation method of one-step method CDP / PET two-component composite silk, its process is as follows:

[0068] (1) According to the FDY process, after distributing the CDP melt (intrinsic viscosity 0.75dL / g) and PET melt (intrinsic viscosity 0.57dL / g) with a mass ratio of 50:50, from the same spinneret The spinneret hole m (round) and the spinneret n (round) are extruded into FDY filaments;

[0069] Wherein, the distribution refers to distributing the CDP melt through the distribution hole A, and simultaneously distributing the PET melt through the distribution hole B into the spinneret hole m, passing the CDP melt through the distribution hole C, and simultaneously distributing the PET melt through the distribution hole D is distributed to the spinneret hole n;

[0070] Distribution hole A and distribution hole B are cylindrical holes of equal height, the diameter ratio of distribution hole A to distribution hole B is 1.4:1, distribution hole C and distribution h...

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Abstract

The present invention relates to a one-step CDP / PET two-component composite filament and a preparation method thereof. According to an FDY technology, CDP and PET melts are distributed, extrusion is performed from spinneret orifices m and n in the same spinneret plate to prepare an FDY, and relaxation heat treatment is performed, wherein the CDP and PET melts flow to the spinneret orifice m through distribution holes A and B and flow to the spinneret orifice n through distribution holes C and D, at inlets of the distribution holes A, B, C and D, the apparent viscosity difference of the CDP andPET melts is not more than 5%, the distribution holes A and B are equal-height cylindrical holes, the diameter ratio is (1.30-1.50) : 1, the distribution holes C and D are equal-height cylindrical holes, and the diameter ratio is 1 : (1.30-1.50); and the prepared composite yarn consists of multiple CDP / PET parallel composite monofilaments with different proportions, and the crimping directions of the monofilaments in the composite filament are in random distribution. A knitted fabric of the two-component composite filament does not have the problem of strip unevenness.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a one-step CDP / PET two-component composite yarn and a preparation method thereof. Background technique [0002] With the continuous expansion of the application range of synthetic fibers and the development of spinning technology, various differentiated fibers with high added value, the so-called second-generation synthetic fibers, have been continuously developed and applied in the past 20 years, among which composite spinning technology in particular. Composite fiber is made by combining two or more fiber-forming high polymer melts or solutions through their respective melt or solution pipelines by using their different types, viscosities or proportions, and then combined by multiple distribution plates. It is distributed in the composite component, and when it reaches the spinneret, it is merged in various ways to form a composite melt (solution) flow, and finally it i...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01D5/32
CPCD01F8/14D01D5/32D01D5/08D01D10/02D10B2401/061D10B2401/14
Inventor 王山水范红卫汤方明张元华王丽丽
Owner JIANGSU HENGLI CHEM FIBER
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