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A kind of polylactic acid/polyester elastomer composite elastic fiber and preparation method thereof

A technology of composite elastic fiber and polyester elastomer, which is applied in the field of polylactic acid composite fiber for textiles and its preparation, can solve the problems of poor compatibility between polyurethane elastomer and polylactic acid, low fiber curl and crimp elastic rate, and easy occurrence of hair problems such as silk, to achieve the effects of improved compatibility, excellent elasticity, and high production efficiency

Active Publication Date: 2021-06-11
TIANE CHEM FIBER GROUP CORP BAODING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) The compatibility between polyurethane elastomer and polylactic acid is poor, and hairs are easy to appear;
[0007] (2) The crimp and crimp elastic modulus of the fiber are small;
[0008] (3) High production cost;
[0009] (4) Long process flow

Method used

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  • A kind of polylactic acid/polyester elastomer composite elastic fiber and preparation method thereof
  • A kind of polylactic acid/polyester elastomer composite elastic fiber and preparation method thereof
  • A kind of polylactic acid/polyester elastomer composite elastic fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] On the basis of the comparative example, in Example 1, the proportion of the hard segment and the soft segment in the polyester elastomer chip was changed, and the preparation method of the melt in the melt extrusion was changed at the same time.

[0074] (1) Raw material selection

[0075] Select polylactic acid slices with a viscosity average molecular weight of 105,000, and polyester elastomer slices with an intrinsic viscosity of 1.50dl / g, wherein the PBT hard segment content in the polyester elastomer is 30wt%, and the soft segment is double-terminated hydroxyl polytetramethylene Methyl ether, content 70wt%.

[0076] (2) Melt extrusion

[0077] Pre-crystallize polylactic acid slices in a crystallization drying tower at 80°C for 1 hour, dry in a 90°C drying tower for 12 hours, pre-crystallize polyester elastomer slices in a crystallization drying tower at 70°C for 1 hour, and dry in a 110°C drying tower Let dry for 12 hours. The dried polylactic acid resin and po...

Embodiment 2

[0086] On the basis of Example 1, the material type of the soft segment in the polyester elastomer was changed, a specific type of compatibilizer and the amount added were added during the melt extrusion process, and the process parameters of stretching and winding were adjusted.

[0087] (1) Raw material selection

[0088] Select polylactic acid slices with a viscosity average molecular weight of 105,000, and polyester elastomer slices with an intrinsic viscosity of 1.20dl / g, wherein the PBT hard segment content in the polyester elastomer is 40wt%, and the soft segment is double-terminated hydroxyl polyoxypropylene Ether, content 60wt%. The molar ratio of glycidyl methacrylate in the compatibilizer EGMA was 5%.

[0089] (2) Melt extrusion

[0090] Pre-crystallize polylactic acid slices in a crystallization drying tower at 80°C for 1 hour, dry in a 90°C drying tower for 12 hours, pre-crystallize polyester elastomer slices in a crystallization drying tower at 70°C for 1 hour,...

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Abstract

The invention provides a polylactic acid / polyester elastomer composite elastic fiber. The composite elastic fiber is composed of polylactic acid slices, polyester elastomer slices and compatibilizers in a mass ratio of 30-70:70-30:0-10 Prepared by composite spinning; the present invention also provides a preparation method of the above-mentioned elastic fiber. By adopting the method of this patent, the compatibility of the composite interface and the compatibility between polylactic acid and polyester elastomer have been improved, the phenomenon of wool filaments no longer occurs, and the spinning process is more stable; the elastic fiber provided by the invention It is composed of polylactic acid and polyester elastomer, which endows polylactic acid fiber with excellent elasticity, soft hand feeling and better wearing comfort, which makes polylactic acid fiber more widely used in next-to-body fabrics.

Description

technical field [0001] The invention relates to the technical field of polylactic acid composite fiber for textile and its preparation, in particular to a polylactic acid / polyester elastomer composite elastic fiber and a preparation method thereof. Background technique [0002] Polylactic acid fiber is currently the only biodegradable polyester material derived from renewable plant resources, and it is also the most promising biomaterial for industrial applications. Polylactic acid fiber has the characteristics of skin-friendly antibacterial, moisture-absorbing and sweat-wicking, and smooth hand feeling, and is suitable for preparing personal fabrics and products. However, due to the high modulus of polylactic acid fiber, it feels hard and has poor elasticity, so the fabric produced is not skin-friendly and lacks elasticity, which also limits its application. [0003] Spandex is the most common elastic fiber and has been widely used in hosiery, swimwear, inner pajamas, spor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01D5/08D01D5/16
Inventor 宋亚男王乐军黄伟伟刘怡宁郑宗强
Owner TIANE CHEM FIBER GROUP CORP BAODING