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A kind of soft polyester fiber and preparation method thereof

A polyester fiber, soft technology, applied in the field of polyester fiber, can solve problems such as uneven stripes, and achieve the effects of good crimping performance, good elasticity and excellent comprehensive performance.

Active Publication Date: 2021-10-19
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 kind of soft polyester fiber and its preparation method, aiming to solve the problem of random "strip-like unevenness" when PBT / PTT side-by-side composite fiber is applied to knitted fabric products in the prior art

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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  • A kind of soft polyester fiber and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of preparation method of soft polyester fiber, its process is as follows:

[0046] According to the POY process, after distributing the PTT melt (intrinsic viscosity of 1.04dL / g) and PBT melt (intrinsic viscosity of 1.1dL / g) with a mass ratio of 50:50, from the same spinneret Hole m (circular) and spinneret hole n (circular) are extruded and subjected to relaxation heat treatment to obtain soft polyester fiber;

[0047] Among them, such as figure 1 As shown, the distribution means that the PBT melt is distributed through the distribution hole A, and the PTT melt is distributed into the spinneret hole m through the distribution hole B, and the PBT melt is distributed through the distribution hole C, and the PTT melt is distributed through the distribution hole Hole D is distributed to 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 PTT melt and PBT melt ...

Embodiment 2

[0054] A kind of preparation method of soft polyester fiber, its process is as follows:

[0055] According to the POY process, after distributing PTT melt (intrinsic viscosity 1.02dL / g) and PBT melt (intrinsic viscosity 1.2dL / g) with a mass ratio of 50:50, from the same spinneret Hole m (circular) and spinneret hole n (circular) are extruded and subjected to relaxation heat treatment to obtain soft polyester fiber;

[0056] Wherein, the distribution refers to distributing the PBT melt through the distribution hole A, while distributing the PTT melt through the distribution hole B to the spinneret hole m, passing the PBT melt through the distribution hole C, and simultaneously distributing the PTT melt through the distribution hole D is distributed into 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 PTT melt and PBT melt differs by 4.6%;

[0057] Distribution hole A and d...

Embodiment 3

[0063] A kind of preparation method of soft polyester fiber, its process is as follows:

[0064] According to the POY process, after distributing PTT melt (intrinsic viscosity 1.02dL / g) and PBT melt (intrinsic viscosity 1.2dL / g) with a mass ratio of 50:50, from the same spinneret Hole m (circular) and spinneret hole n (circular) are extruded and subjected to relaxation heat treatment to obtain soft polyester fiber;

[0065] Wherein, the distribution refers to distributing the PBT melt through the distribution hole A, while distributing the PTT melt through the distribution hole B to the spinneret hole m, passing the PBT melt through the distribution hole C, and simultaneously distributing the PTT melt through the distribution hole D is distributed into 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 PTT melt and PBT melt differs by 4.7%;

[0066] Distribution hole A and d...

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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Abstract

The invention relates to a soft polyester fiber and a preparation method thereof. According to the POY process, after distributing the PTT melt and the PBT melt, extruding from the spinneret m and the spinneret n on the same spinneret plate Relaxation heat treatment to produce soft polyester fiber, in which PBT and PTT melt flow through distribution holes A and B to spinneret m, through distribution holes C and D to spinneret n, at the entrance of each distribution hole , the difference in apparent viscosity between PTT melt and PBT melt is not more than 5%, distribution holes A and B are cylindrical holes of equal height, and the ratio of diameter is 1.10~1.50:1, distribution holes C and D are cylindrical holes of equal height , and the diameter ratio is 1:1.10-1.50; the soft polyester fiber is composed of multiple PBT / PTT parallel composite monofilaments with two ratios, and the curling directions of the monofilaments are randomly distributed. The invention solves the problem of "striped unevenness" existing in the knitted fabric of PBT / PTT side-by-side composite fibers.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a soft polyester fiber and a preparation method thereof. Background technique [0002] The softness of the fabric is a subjective feeling when people touch and pinch the fabric. Softness is a very important property for fibers. The fibers with good softness are fine and uniform, strong and elastic. The texture is soft, smooth and delicate to the touch, and the spun fabric has the characteristics of soft touch and elegant wearing. [0003] PBT / PTT composite fiber has fine and dense three-dimensional crimp, superior resilience, soft hand feeling and excellent dyeing performance. It is an ideal raw material for imitation wool and down, and is comfortable to wear. Due to the above-mentioned characteristics of PBT fiber, it has received widespread attention in the textile industry in recent years and has been widely used in various fields. It is especially suitable for making...

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 Patents(China)
IPC IPC(8): D01D5/22D01D5/32D01D10/02D01F8/14D01D5/08
CPCD01D5/082D01D5/22D01D5/32D01D10/02D01F8/14
Inventor 王丽丽王山水汤方明范红卫蒋丽波
Owner JIANGSU HENGLI CHEM FIBER
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