Low-cost bio-based composite fiber as well as preparation method and application thereof

A composite fiber, bio-based technology, used in fiber processing, conjugated synthetic polymer rayon, final product manufacturing, etc. The effect of low volume, good hand feeling and lower production cost

Pending Publication Date: 2022-06-03
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a polyamide fiber, the source of nylon 66 mainly depends on petroleum, but as a non-renewable resource, petroleum not only faces the hidden danger of resource depletion, but also triggers many environmental problems during the application process
In addition, due to the high price of nylon 66, its further wide application is limited.

Method used

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  • Low-cost bio-based composite fiber as well as preparation method and application thereof
  • Low-cost bio-based composite fiber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 1.1 Preparation of semi-dull nylon 66 slices

[0067] (1) Weigh the raw nylon 66 slices (white particles, relative viscosity 2.40), put them into a high-speed mixer, add a matting agent titanium dioxide (purity 99.9%, type is anatase, particle size 300nm), the amount of titanium dioxide added is nylon 0.2% of the mass of 66, stir at a low speed of 100rpm for 10 minutes, take it out, and set aside;

[0068] (2) Place the mixed material in the above (1) on the main feeding port of a twin-screw extruder with an aspect ratio of 42:1, melt extrusion and granulation, and the extruded material is cooled, air-dried, pelletized, and vacuumized. After drying, a dried semi-matte nylon 66 was obtained.

[0069] The temperature setting range of the twin-screw extruder is 255-270°C, the screw speed is 450rpm, and the temperature of each zone of the twin-screw extruder is: the temperature of the first zone: 255°C, the temperature of the second zone: 260°C, and the temperature of the ...

Embodiment 2

[0085] 2.1 Preparation of semi-dull nylon 66 slices

[0086] (1) Weigh the raw nylon 66 slices (white particles, relative viscosity 2.40), put them into a high-speed mixer, add a matting agent titanium dioxide (purity 99.9%, type is anatase, particle size 300nm), the amount of titanium dioxide added is nylon 0.3% of the mass of 66, stir at a low speed of 100rpm for 10 minutes, take it out, and set aside;

[0087] (2) Place the mixed material in the above (1) on the main feeding port of a twin-screw extruder with an aspect ratio of 42:1, melt extrusion and granulation, and the extruded material is cooled, air-dried, pelletized, and vacuumized. After drying, a dried semi-matte nylon 66 was obtained.

[0088] The temperature setting range of the twin-screw extruder is 255~270℃, the screw speed is 500rpm, the temperature of each zone of the twin-screw extruder is: the temperature of the first zone: 255°C, the temperature of the second zone: 260°C, and the temperature of the third...

Embodiment 3

[0104] 3.1 Preparation of semi-dull nylon 66 slices

[0105](1) Weigh the raw nylon 66 slices (white particles, relative viscosity 2.40), put them into a high-speed mixer, add a matting agent titanium dioxide (purity 99.9%, type is anatase, particle size 300nm), the amount of titanium dioxide added is nylon 0.4% of the mass of 66, stir at a low speed of 100rpm for 10 minutes, take it out, and set aside;

[0106] (2) Place the mixed material in the above (1) on the main feeding port of a twin-screw extruder with an aspect ratio of 42:1, melt extrusion and granulation, and the extruded material is cooled, air-dried, pelletized, and vacuumized. After drying, a dried semi-matte nylon 66 was obtained.

[0107] The temperature setting range of the twin-screw extruder is 255~270℃, the screw speed is 550rpm, and the temperature of each zone of the twin-screw extruder is: the temperature of the first zone: 255°C, the temperature of the second zone: 260°C, and the temperature of the th...

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Abstract

The invention discloses a low-cost bio-based composite fiber as well as a preparation method and application thereof. The composite fiber comprises a core layer and a skin layer wrapping the core layer, the core layer is made of nylon 56, the skin layer is made of nylon 66, and in the cross section of the composite fiber, the ratio of the cross section area of the core layer to the cross section area of the skin layer is (20-80): (20-80). The preparation method comprises the following steps: respectively preparing nylon 66 slices and nylon 56 slices; the nylon 66 slices and the nylon 56 slices are subjected to melt extrusion composite spinning, so that the nylon 56 forms a core layer, the nylon 66 forms a skin layer, and the low-cost bio-based composite fiber is obtained. The mechanical property of the composite fiber is equivalent to that of nylon 66 fiber, the flexibility is better, the production cost is low, and the composite fiber can meet some low-cost nylon 66 fiber application occasions, such as the fields of automobile safety airbags, nylon industrial yarns and the like; and the fiber also belongs to bio-based composite fiber, and accords with the current low-carbon and environment-friendly development trend.

Description

technical field [0001] The invention belongs to the technical field of composite fibers, and in particular relates to a low-cost bio-based composite fiber and a preparation method and application thereof. Background technique [0002] Nylon 66, also known as nylon 66, polyamide-66, polyhexamethylene adipamide, is obtained by the polycondensation of hexamethylene diamine and adipic acid. Nylon 66 has the advantages of high strength, good rigidity, impact resistance, oil and chemical resistance, wear resistance and self-lubrication, especially better hardness, rigidity, heat resistance and creep performance, so it has good comprehensive performance and easy raw materials. It can be used as engineering plastics, mechanical accessories such as gears, lubricating bearings, instead of non-ferrous metal materials to make machine casings, automobile engine blades, etc., and can also be used to make synthetic fibers. Therefore, nylon 66 is widely used in industry, clothing, decorati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/12D01D5/34
CPCD01F8/12D01D5/34Y02P70/62
Inventor 刘伯林金剑姜锋
Owner CHINESE TEXTILE ACAD
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