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Preparation method of trilobal polylactic acid pattern fiber

A technology of polylactic acid and trilobal type, which is applied in fiber processing, stretch spinning, filament forming processing, etc., can solve the problems of limited fluffy effect of single curl, unsatisfactory elasticity, monotonous color and other problems, and meet the requirements of industrialization The effect of amplifying production requirements and short process steps

Inactive Publication Date: 2019-07-30
CHANGSHU GOLD SPRING CHEM FIBERS & KNITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are the following shortcomings: due to the use of a single polylactic acid, the color (color) is monotonous; due to the retraction of the fiber made of a single polylactic acid melt after stretching, it can only show a single crimp, while a single crimp The fluffy effect is limited, and due to the limited fluffy effect, the elasticity is far from meeting the requirements expected by the industry

Method used

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  • Preparation method of trilobal polylactic acid pattern fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] figure 1 The preparation method of shown trilobal polylactic acid color fiber comprises the following steps:

[0023] A) Raw material preparation, prepare polylactic acid slices I with the first intrinsic viscosity, polylactic acid slices II with the second intrinsic viscosity, and polylactic acid slices III with the third intrinsic viscosity and dry them separately. In this step, the The polylactic acid slice I with the first intrinsic viscosity, the polylactic acid slice II with the second intrinsic viscosity, and the polylactic acid slice III with the third intrinsic viscosity have a volume ratio of 1:1:1, and the first intrinsic viscosity The viscosity value of the polylactic acid slice I is 0.8 dL / g, the viscosity value of the second intrinsic viscosity is 1dL / g, the viscosity value of the third intrinsic viscosity is 1.2 dL / g, and the drying temperature for drying the polylactic acid slice I is The temperature is 70°C, the drying time is 18h, the drying temperatu...

Embodiment 2

[0027] figure 1 The preparation method of shown trilobal polylactic acid color fiber comprises the following steps:

[0028] A) Raw material preparation, prepare polylactic acid slices I with the first intrinsic viscosity, polylactic acid slices II with the second intrinsic viscosity, and polylactic acid slices III with the third intrinsic viscosity and dry them separately. In this step, the The volume ratio of the polylactic acid slice I with the first intrinsic viscosity, the polylactic acid slice II with the second intrinsic viscosity, and the polylactic acid slice III with the third intrinsic viscosity is 1:0.9:0.95, and the first intrinsic viscosity The viscosity value of the second intrinsic viscosity is 0.6 dL / g, the viscosity value of the second intrinsic viscosity is 0.8dL / g, the viscosity value of the third intrinsic viscosity is 1dL / g, and the drying temperature for drying the polylactic acid slice I is The drying temperature for drying the polylactic acid slice II...

Embodiment 3

[0032] figure 1 The preparation method of shown trilobal polylactic acid color fiber comprises the following steps:

[0033] A) Raw material preparation, prepare polylactic acid slices I with the first intrinsic viscosity, polylactic acid slices II with the second intrinsic viscosity, and polylactic acid slices III with the third intrinsic viscosity and dry them separately. In this step, the The volume ratio of the polylactic acid slice I with the first intrinsic viscosity, the polylactic acid slice II with the second intrinsic viscosity, and the polylactic acid slice III with the third intrinsic viscosity is 1:0.95:0.9, and the first intrinsic viscosity The viscosity value of the polylactic acid slice I is 0.7 dL / g, the viscosity value of the second intrinsic viscosity is 0.9 dL / g, and the viscosity value of the third intrinsic viscosity is 1.1 dL / g. Dry the polylactic acid slice I The temperature is 80°C, the drying time is 12h, the drying temperature for drying the polylac...

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Abstract

The invention relates to a preparation method of a trilobal polylactic acid pattern fiber, which comprises the steps of preparing and drying a polylactic acid slice I, a polylactic acid slice II and apolylactic acid slice III, performing extrusion and metering through a extruder after adding the dry polylactic acid slice I into a first masterbatch to form first spinning melt, performing extrusionand metering through the extruder after adding the dry polylactic acid slice II into a second masterbatch to form second spinning melt, performing extrusion and metering through the extruder after adding the dry polylactic acid slice III into a third masterbatch to form third spinning melt, introducing the first spinning melt, the second spinning melt and the third spinning melt into a spinning trunk, allowing the first spinning melt, the second spinning melt and the third spinning melt to flow to a spinneret plate through respective melt flow channels, converge at a spinneret orifice and beextruded, performing air blast cooling and oiling to form a nascent fiber, and sequentially performing preliminary drafting, main drafting networking, hot plate forming and winding to a cylinder on the nascent fiber after balancing to form a finished product. The method is short in procedure; technical elements are not rigorous; and the fiber has a rich color effect and excellent fluffiness and air permeability.

Description

technical field [0001] The invention belongs to the technical field of chemical fiber preparation, and in particular relates to a preparation method of trilobal polylactic acid colored fiber. Background technique [0002] As known in the industry, polylactic acid fiber is made from starch-containing agricultural products such as corn, sugar beet, and wheat, which are fermented to produce lactic acid, and then polycondensed and melt-spun (ie, melt-spun). Grow, grow, and discard synthetic fibers that degrade in nature. Polylactic acid fiber can be decomposed into carbon dioxide and water by microorganisms in soil or seawater. It will not emit toxic and harmful gases when burned. It is a sustainable ecological fiber that conforms to the spirit of circular economy. Due to the good hand feeling and drapability of the clothing fabric processed by polylactic acid fiber, it can reflect good UV resistance, low flammability and excellent processing performance, so it is suitable for ...

Claims

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Application Information

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IPC IPC(8): D01D5/253D01D5/30D01D1/06D01D1/00D01D5/088D01D5/12D02J1/08D01F8/14D01F1/04
CPCD01D1/00D01D1/065D01D5/088D01D5/12D01D5/253D01D5/30D01F1/04D01F8/14D02J1/08
Inventor 李文俊樊海彬刘薇王宁王维平
Owner CHANGSHU GOLD SPRING CHEM FIBERS & KNITTINGS
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