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Three-dimensional crimped low-melting-point polyester fiber and preparation method thereof

A low-melting point polyester and three-dimensional crimping technology, which is applied in fiber processing, conjugated synthetic polymer artificial filaments, textiles and papermaking, can solve problems such as unsatisfactory requirements and singleness, and achieve excellent three-dimensional comfort and craftsmanship. Simple, Development-Promoting Effects

Inactive Publication Date: 2019-07-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most low-melting point polyester staple fibers are mostly mechanically crimped, and the fiber specifications are mainly concentrated on a single specification of 4.0D×51MM. Requirements for Nonwoven Products

Method used

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  • Three-dimensional crimped low-melting-point polyester fiber and preparation method thereof
  • Three-dimensional crimped low-melting-point polyester fiber and preparation method thereof
  • Three-dimensional crimped low-melting-point polyester fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A method for preparing three-dimensional crimped low-melting polyester fibers, the steps are as follows:

[0037] (1) Vacuum-dry low-melting-point renewable polyester at 80°C for 24 hours, PET crystallized at 160°C for 2 hours, then vacuum-dry at 130°C for 12 hours;

[0038](2) Using low-melting renewable polyester and PET with a melting point of 130°C, a carboxyl-terminal content of 35 mmol / kg, and an intrinsic viscosity of 0.6 dL / g as the skin layer component and core layer component, the skin-core composite spinning method is adopted The three-dimensional crimped low-melting polyester fiber is obtained by spinning, wherein the mass ratio of the skin layer component and the core layer component is 45:55; the skin-core composite spinning method adopts the skin-core composite spinning component, and the skin-core composite spinning component The cross-sectional shape of the flow guide hole in the flow guide plate corresponding to the core layer component, the flow guide...

Embodiment 2

[0046] A method for preparing three-dimensional crimped low-melting polyester fibers, the steps are as follows:

[0047] (1) Vacuum dry the low melting point renewable polyester at 80°C for 20 hours; PTT at 120°C for 24 hours

[0048] (2) Using low-melting renewable polyester and PTT with a melting point of 90°C, a carboxyl-terminal content of 30mmol / kg, and an intrinsic viscosity of 0.5dL / g as the skin layer component and core layer component, the skin-core composite spinning method is adopted Three-dimensional crimped low-melting polyester fibers are obtained by spinning, wherein the mass ratio of the skin layer component to the core layer component is 55:45; the skin-core composite spinning method uses a skin-core composite spinning component, and a skin-core composite spinning component The cross-sectional shapes of the guide holes in the guide plate corresponding to the core layer component, the guide holes in the guide plate corresponding to the skin layer component, and...

Embodiment 3

[0052] A method for preparing three-dimensional crimped low-melting polyester fibers, the steps are as follows:

[0053] (1) Vacuum-dry the low-melting-point renewable polyester and PBT at 100°C for 24 hours;

[0054] (2) Using low-melting renewable polyester and PBT with a melting point of 160°C, a carboxyl-terminal content of 20mmol / kg, and an intrinsic viscosity of 1.0dL / g as the skin layer component and core layer component, the skin-core composite spinning method is adopted Three-dimensional crimped low-melting polyester fibers are obtained by spinning, wherein the mass ratio of the skin layer component to the core layer component is 50:50; the skin-core composite spinning method uses a skin-core composite spinning component, and a skin-core composite spinning component The cross-sectional shapes of the guide holes in the guide plate corresponding to the core layer component, the guide holes in the guide plate corresponding to the skin layer component, and the spinneret h...

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Abstract

The invention relates to a three-dimensional crimped low-melting-point polyester fiber and a preparation method thereof. The method includes the following steps that low-melting-point polyester and conventional polyester are taken as a skin-layer component and a core-layer component respectively, and the three-dimensional crimped low-melting-point polyester fiber is then prepared by using a skin-core composite spinning method; the skin-core composite spinning method adopts a skin-core composite spinning assembly, a flow guide hole in a guide plate corresponding to the core-layer component in the assembly and a spinneret orifice in a spinneret plate corresponding to the skin-layer component in the assembly are same in cross section shape, the edge of the cross section of the spinneret orifice is formed by connecting an arc, a line segment a and a line segment b in sequence, the arc refers to the circular arc or the elliptic arc, the connection point of the line segment a and the line segment b is located at the center of a circle corresponding to the circular arc or at the center of an ellipse corresponding to the elliptic arc, and the included angle of the line segment a and the line segment b is 10-170 degrees. The crispation number of the prepared three-dimensional crimped low-melting-point polyester fiber is 12-25 piece / 25 mm, and the crimp percentage is 8-20%. The preparation method is simple, and the prepared polyester fiber is excellent in three-dimensional feeling and comfort level.

Description

technical field [0001] The invention belongs to the technical field of synthetic fibers, and relates to a preparation method of a three-dimensional crimped low-melting polyester fiber. Background technique [0002] Low-melting polyester fiber refers to a polyester with a lower melting point obtained by modifying conventional polyester. Because its structure is similar to that of conventional polyester, it retains some of the characteristics of conventional polyester. Conventional polyesters are characterized by good compatibility. This modified polyester not only has low melting point, good fluidity, but also moderate price, so it is widely used. Low-melting point polyester fiber can be made into skin-core composite fiber, which is used in clothing, medical and health fields, and can also be used for blending with wool to improve the washing and wearability of worsted wool fabrics, especially the thermal bonding of low-melting point polyester. Synthetic fibers are used in ...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01D5/34D01D5/253
CPCD01D5/253D01D5/34D01F8/14
Inventor 陈烨王华平李明明柯福佑王朝生吉鹏徐静陈向玲李军令
Owner DONGHUA UNIV
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