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Skin-core type composite fiber bundle as well as preparation method and application thereof

A composite fiber, skin-core technology, used in fiber processing, fiber chemical characteristics, stretch spinning, etc., can solve the problems of easy closure of the inner cavity of the fiber, interpenetration, and loss of the liquid conduction function of the fiber. Excellent water conductivity, simple preparation process, high strength and hardness

Active Publication Date: 2022-05-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the conduction of liquid is often achieved by preparing hollow fibers, but it is difficult to make the fibers have sufficient hardness by simply using the hollow structure, and the inner cavity of the fiber is easy to close under the action of external force, which will eventually cause the fiber to lose its liquid conduction function.
In addition, there are also studies that use capillary channels formed by fibers with special-shaped cross-sections to realize liquid migration, but fibers with special-shaped cross-sections cannot produce fibers with stable structure and satisfactory hardness, and special-shaped cross-sections may have interpenetration between cross-section blades and lose the ability to build capillary channels. channel possible

Method used

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  • Skin-core type composite fiber bundle as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of sheath-core type composite fiber bundle, its preparation method comprises the following steps:

[0042] 1) With the polyethylene of 65 mass parts, the ethylene-propylene copolymer of 30 mass parts and the maleic anhydride grafted polyethylene of 5 mass parts as cortex material, carry out drying first, then add the first screw extruder, pass through the second A metering pump carries out melt distribution and enters the composite spinning pack, and 500 mass parts of polyethylene terephthalate and 400 mass parts of polyethylene terephthalate-1,4-cyclohexane Dimethyl ester copolymer is used as the core layer material, first dried, then added to the second screw extruder, and the melt is distributed through the second metering pump into the composite spinning assembly for composite spinning to obtain primary composite fibers;

[0043] 2) Stretch the nascent composite fiber by 1 time at 160°C, and then perform heat setting treatment at 140°C for 60s to obtain a she...

Embodiment 2

[0055] A kind of sheath-core type composite fiber bundle, its preparation method comprises the following steps:

[0056] 1) 97 parts by mass of polypropylene, 2 parts by mass of ethylene-propylene-non-conjugated diene copolymer and 1 part by mass of maleic anhydride grafted styrene-ethylene-butadiene-styrene block copolymer As the cortex material, it is dried first, then added to the first screw extruder, and the melt is distributed into the composite spinning assembly through the first metering pump, and 900 parts by mass of polyethylene terephthalate-polyethylene Glycol block copolymer is used as the core layer material, first dried, then added to the second screw extruder, and the melt is distributed through the second metering pump into the composite spinning assembly for composite spinning to obtain primary composite fibers;

[0057] 2) Stretch the nascent composite fiber by 7 times at 195°C, and then perform heat setting treatment at 180°C for 150s to obtain a sheath-cor...

Embodiment 3

[0067] A kind of sheath-core type composite fiber bundle, its preparation method comprises the following steps:

[0068] 1) Use 90 parts by mass of polypropylene, 8 parts by mass of ethylene-butene copolymer and 2 parts by mass of glycidyl methacrylate grafted polypropylene as the skin layer material, dry it first, and then add the first screw extrusion Machine, through the first metering pump, the melt is distributed into the composite spinning assembly, and 538 parts by mass of polybutylene terephthalate and 28 parts by mass of polyethylene are used as core material, first dried, and then added to the second Two-screw extruder, through the second metering pump, the melt is distributed into the composite spinning assembly, and composite spinning is performed to obtain primary composite fibers;

[0069] 2) Stretch the nascent composite fiber 3 times at 180°C, and then perform heat setting treatment at 160°C for 300s to obtain a sheath-core composite fiber bundle.

[0070] Not...

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Abstract

The invention discloses a sheath-core type composite fiber bundle as well as a preparation method and application thereof. The preparation method of the sheath-core type composite fiber bundle comprises the following steps: 1) compounding polyolefin, a polyolefin elastomer and a polyolefin grafted copolymer as a sheath layer material, taking at least one of polyolefin, polyester and a polyester copolymer as a core layer material, and carrying out composite spinning to obtain a nascent composite fiber; and 2) stretching the nascent composite fiber, and carrying out heat setting treatment to obtain the sheath-core type composite fiber bundle. The sheath-core type composite fiber bundle is high in strength and hardness, excellent in water absorption and water diversion performance, simple in preparation process, free of special production equipment, suitable for being used as a liquid transmission fiber rod, a liquid transmission block and the like, and very wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of functional fibers, in particular to a sheath-core composite fiber bundle and its preparation method and application. Background technique [0002] Composite fiber refers to the fiber formed by inputting the melts or solutions of two or more fiber-forming polymers into the same spinning assembly, converging in the assembly and ejecting from the same spinneret hole. Different types, components, ratios, viscosities, etc. of fiber-forming polymers will cause composite fibers to exhibit different properties. The core polymer of the sheath-core (C / S type) composite fiber is completely wrapped by the sheath polymer, and the sheath and core components have their own unique properties, which can make up for the shortcomings of a single polymer and endow the fiber with a unique Combination performance, is a very general type of composite fiber structure. [0003] Water-absorbing fiber refers to a fiber with water...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F8/06D01F8/16D01F1/10D01D5/34D01D5/12D01D10/02
CPCD01F8/14D01F8/06D01F8/16D01F1/10D01D5/34D01D5/12D01D10/02
Inventor 严玉蓉
Owner SOUTH CHINA UNIV OF TECH
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