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Polyphenyl thioether / thermotropic liquid crystal complex fiber and preparation thereof

A polyphenylene sulfide and composite fiber technology, applied in fiber processing, fiber chemical characteristics, single-component synthetic polymer rayon, etc., can solve the problem of high spinning temperature, poor fiber continuity, polyphenylene sulfide resin The problem of low linearity, etc., can improve the mechanical properties and processing performance, improve the comprehensive performance, and highlight the effect of heat resistance.

Inactive Publication Date: 2009-05-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, due to the low linearity of polyphenylene sulfide resin, high spinning temperature, poor fluidity, poor continuity of spun fibers, and unsatisfactory mechanical properties, this expensive material in the market cannot be used Give full play to its excellent characteristics

Method used

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  • Polyphenyl thioether / thermotropic liquid crystal complex fiber and preparation thereof
  • Polyphenyl thioether / thermotropic liquid crystal complex fiber and preparation thereof
  • Polyphenyl thioether / thermotropic liquid crystal complex fiber and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 0.5 parts of TLCP and 100 parts of PPS slices or powder, put both in a vacuum drying oven at 120 ° C for 12 hours, mix the dried TLCP and PPS evenly; then put the mixture into the screw extrusion In the machine, melt spinning is carried out at 318°C, and the spinning speed is 700m / min. After the melt is sprayed from the spinneret, it passes through the slow cooling device, and the slow cooling temperature is 320°C. Water-bath stretching, dry stretching at 110°C and heat setting at 180°C, with a total draw ratio of 3.5 times, to obtain polyphenylene sulfide / thermotropic liquid crystal composite fibers. The properties of the composite fibers are shown in Table 1.

Embodiment 2

[0043] Weigh 1 part of TLCP and 100 parts of PPS slices or powder, put both in a vacuum drying oven at 120 ° C for 12 hours at the same time, mix the dried TLCP and PPS evenly; then put the mixture into the screw extrusion In the machine, melt spinning is carried out at 318°C, and the spinning speed is 700m / min. After the melt is sprayed from the spinneret, it passes through the slow cooling device, and the slow cooling temperature is 320°C. Water-bath stretching, dry stretching at 110°C and heat setting at 180°C, with a total draw ratio of 3.5 times, to obtain polyphenylene sulfide / thermotropic liquid crystal composite fibers. The properties of the composite fibers are shown in Table 1.

Embodiment 3

[0045] Weigh 2 parts of TLCP and 100 parts of PPS slices or powder, put them in a vacuum drying oven at 120 ° C for 12 hours at the same time, mix the dried TLCP and PPS evenly; then put the mixture into the screw extrusion In the machine, melt spinning is carried out at 318°C, and the spinning speed is 700m / min. After the melt is sprayed from the spinneret, it passes through the slow cooling device, and the slow cooling temperature is 320°C. Water-bath stretching, dry stretching at 110°C and heat setting at 180°C, the total draw ratio was 3.5 times to obtain polyphenylene sulfide / thermotropic liquid crystal composite fibers. The properties of the composite fibers are shown in Table 1.

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Abstract

The invention discloses a polyphenylene sulfide / thermotropic liquid crystal composite fiber and a method for preparing the same. The polyphenylene sulfide / thermotropic liquid crystal composite fiber comprises 100 portions of polyphenylene sulfide slice or powder material and 0.5 to 5 portions of thermotropic liquid crystal. The method for preparing the polyphenylene sulfide / thermotropic liquid crystal composite fiber comprises the following steps: drying the polyphenylene sulfide slice or the powder material and the thermotropic liquid crystal through a vacuum rotary drum dryer respectively, and mixing the materials evenly; performing melt spinning on the obtained mixture in a screw spinning device to obtain a fused body which is spouted out from a spinneret plate, passes through a annealing device, and then is cooled naturally and solidified into a fiber; and coiling the cooled fiber after the fiber is oiled and clustered, and performing hot water bath first-stage stretching, dry heat second-stage stretching and a one-step heat-setting treatment on the coiled fiber so as to obtain the polyphenylene sulfide / thermotropic liquid crystal composite fiber. The polyphenylene sulfide / thermotropic liquid crystal composite fiber has the advantages that the mechanical property and the processing performance of the polyphenylene sulfide fiber can be improved, the equipment is simple, and the operation is easy.

Description

technical field [0001] The invention relates to a polyphenylene sulfide / thermotropic liquid crystal composite fiber and a preparation method thereof, belonging to the technical field of composite fibers. Background technique [0002] Polyphenylene sulfide is referred to as PPS (Polyphenylene Sulfide), and its full name is polyphenylene sulfide, also known as polyphenylene sulfide. The crystalline thermoplastic material has excellent formability, thermal stability, chemical corrosion resistance, physical and mechanical properties, low toxicity, heat resistance, flame retardancy and electrical conductivity. Therefore, as a high-performance basic material, it is a state-developed cutting-edge Technology, military equipment and new materials urgently needed by various industries. [0003] Polyphenylene sulfide was first successfully developed by the American Phillip Company, and it was industrialized in 1971. In 1979, a polymer linear PPS resin suitable for spinning was synthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10D01D5/088D01D5/096D01D5/12
Inventor 王依民廖谦王燕萍倪建华
Owner DONGHUA UNIV
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