Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of polylactic acid side-by-side composite fiber

A composite fiber and polylactic acid technology, which is applied in fiber processing, conjugated synthetic polymer artificial filament, melt spinning, etc., can solve the problems of poor elasticity and poor temperature resistance of polylactic acid, and achieve good elasticity and temperature resistance Enhances and improves wrinkle resistance

Active Publication Date: 2019-08-09
南通华盛高聚物科技股份有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to improve the problems of poor elasticity and poor temperature resistance of polylactic acid itself.

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of polylactic acid side-by-side composite fiber
  • A kind of preparation method of polylactic acid side-by-side composite fiber
  • A kind of preparation method of polylactic acid side-by-side composite fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The raw material is polylactic acid with an intrinsic viscosity of 1.0dl / g, polyester with an intrinsic viscosity of 0.6dl / g, and the mass ratio of polylactic acid to polyester is 80:20.

[0052] A preparation method of polylactic acid side-by-side composite fibers, specifically comprising the steps of:

[0053] The polylactic acid slices are dried in three stages to obtain dried polylactic acid slices with a moisture content of less than 0.005%. The dried polylactic acid slices are melted and extruded at high temperature by the screw at low temperature, metered and then enter the parallel composite assembly for parallel composite distribution and parallel composite with polyester at the composite spinneret. The polyester chips are dried in three stages to obtain dried polyester chips with a moisture content of less than 0.005%. The dried polyester chips are extruded by the screw at low temperature and high temperature, and then metered and then enter the parallel comp...

Embodiment 2

[0058] The raw material is polylactic acid with an intrinsic viscosity of 1.0dl / g, polyester with an intrinsic viscosity of 0.6dl / g, and the mass ratio of polylactic acid to polyester is 50:50.

[0059] A preparation method of polylactic acid side-by-side composite fibers, specifically comprising the steps of:

[0060] The polylactic acid slices are dried in three stages to obtain dried polylactic acid slices with a moisture content of less than 0.005%. The dried polylactic acid slices are melted and extruded at high temperature by the screw at low temperature, metered and then enter the parallel composite assembly for parallel composite distribution and parallel composite with polyester at the composite spinneret. The polyester chips are dried in three stages to obtain dried polyester chips with a moisture content of less than 0.005%. The dried polyester chips are extruded by the screw at low temperature and high temperature, and then metered and then enter the parallel comp...

Embodiment 3

[0065] The raw material is polylactic acid with an intrinsic viscosity of 1.5dl / g, nylon with an intrinsic viscosity of 0.6dl / g, and the mass ratio of polylactic acid to polyester is 80:20.

[0066] A preparation method of polylactic acid side-by-side composite fibers, specifically comprising the steps of:

[0067] The polylactic acid slices are dried in three stages to obtain dried polylactic acid slices with a moisture content of less than 0.005%. The dried polylactic acid slices are melted and extruded at high temperature by the screw at low temperature, measured and then entered into the parallel composite assembly for parallel compound distribution, and then compounded side by side with nylon at the composite spinneret. Nylon slices are dried in three stages to obtain dried nylon slices with a moisture content of less than 0.005%. The dried nylon chips are extruded through the screw at low temperature and high temperature, and then metered and then enter the parallel com...

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
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
Curvatureaaaaaaaaaa
shrinkageaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a polylactic acid side-by-side composite fiber. Polylactic acid slices and modified component slices are subjected to three-stage drying and screw melting respectively and then enters a spinning box for side-by-side compounding at a spinneret plate, the side-by-side composite fiber out from the spinneret plate is subjected to air blast cooling, oiling, winding and traction, and silk accommodating sequentially, and after oil immersion water-bath stretching, steam stretching, oiling and cooling, and heat setting, the polylactic acid side-by-sidecomposite fiber is obtained; a modified component is selected from one or combination of dacron and chinlon; the mass ratio of polylactic acid to the modified component is 80:20 to 50:50. The polylactic acid side-by-side composite fiber is good in crimp tendency and temperature resistance, and suitable for being applied to filling materials or clothing fabrics.

Description

technical field [0001] The invention relates to the technical field of composite fiber production, in particular to a preparation method of polylactic acid side-by-side composite fibers. Background technique [0002] Due to its good biodegradability and antibacterial properties, the application prospects of polylactic acid fibers have attracted widespread attention. However, its poor elasticity and poor temperature resistance limit its application in filling materials and clothing industries. [0003] In the prior art, there is some involvement in the modification of polylactic acid and other fibers to make composite fibers. CN106917161A uses ultra-fine nylon as the core wire and covers the core wire with polylactic acid fiber to obtain a composite fiber with comfortable hand feeling, good elasticity, degradability and good antibacterial property. [0004] However, in the prior art, there is no method of juxtaposing polylactic acid composite fibers to improve the problems ...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/32D01F8/14D01F8/12D01D5/08D01D5/14D01D10/02
CPCD01D5/08D01D5/14D01D5/32D01D10/02D01F8/12D01F8/14
Inventor 沈坤良张春华冯爱华
Owner 南通华盛高聚物科技股份有限公司