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POM (polyoxymethylene)-PLA (polylactic acid)-poly(p-dioxanone) ternary composite fibers and preparation method thereof

A polydioxanone and ternary compound technology, applied in the field of composite fibers, can solve the problems of insufficient flexibility and poor flexibility, and achieve the effect of being beneficial to the processing technology

Active Publication Date: 2016-04-06
镇江吉邦材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high crystallization rate and crystallinity characteristics of polyoxymethylene fiber ensure its excellent mechanical properties, but its flexibility is insufficient
Polylactic acid (PLA) has good mechanical strength, elastic modulus and degradability, but its hard and brittle and poor flexibility limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dry polyoxymethylene with a melt index of 9.0g / 10min, polylactic acid with a molecular weight of 150,000, and polydioxanone with a molecular weight of 350,000 at 90°C, 80°C, and 40°C for 6h, 16h, and 8h, respectively. . According to the mass ratio of 80:12:8, after mixing evenly in the high-speed mixer, it is added to the screw extruder. The temperatures of the feeding section, compression section and metering section of the screw extruder are 90°C, 200°C, and 195°C respectively. After filtering, box components and spinneret, it is cooled by the tunnel and then wound. The tunnel within 1 meter below the spinneret is protected by nitrogen gas, and the winding speed is 150m / min. The as-spun fibers were drawn at a temperature of 135°C in the subsequent process, and the total draw ratio was 6.5 times; the heat-setting temperature was 70°C, and the time was 300s. The oiling process adopted is that the concentration of the oil agent is 5%, the frequency of the tanker is 15H...

Embodiment 2

[0026] Dry polyoxymethylene with a melting index of 3.5g / 10min, polylactic acid with a molecular weight of 330,000, and polydioxanone with a molecular weight of 80,000 at 100°C, 60°C, and 60°C for 6h, 24h, and 8h, respectively. . According to the mass ratio of 60:25:15, after mixing evenly in the high-speed mixer, it is added to the screw extruder. The temperatures of the feeding section, compression section and metering section of the screw extruder are 110°C, 195°C, and 190°C respectively. After filtering, box components and spinneret, it is cooled by the tunnel and then wound. The tunnel within 1 meter below the spinneret is protected by nitrogen gas, and the winding speed is 400m / min. The as-spun fibers were drawn at a temperature of 150°C in the subsequent process, and the total draw ratio was 10 times; the heat-setting temperature was 115°C, and the time was 20s. The oiling process adopted is that the concentration of the oil agent is 12.5%, the frequency of the tanker...

Embodiment 3

[0028] Dry polyoxymethylene with a melt index of 15.0g / 10min, polylactic acid with a molecular weight of 40,000, and polydioxanone with a molecular weight of 420,000 at 85°C, 72°C, and 55°C for 6h, 20h, and 8h, respectively. . According to the mass ratio of 68:22:10, after mixing evenly in the high-speed mixer, it is added to the screw extruder. The temperatures of the feeding section, compression section and metering section of the screw extruder are 100°C, 178°C, and 210°C respectively. After filtering, box components and spinneret, it is cooled by the tunnel and then wound. The tunnel within 1 meter below the spinneret is protected by nitrogen gas, and the winding speed is 320m / min. The as-spun fibers were drawn at a temperature of 145°C in the subsequent process, and the total draw ratio was 7.5 times; the heat-setting temperature was 105°C, and the time was 90s. The oiling process adopted is that the concentration of the oil agent is 8%, the frequency of the tanker is 9...

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Abstract

The invention relates to POM (polyoxymethylene)-PLA (polylactic acid)-poly(p-dioxanone) ternary composite fibers and a preparation method thereof. The composite fibers comprise components including POM, PLA and poly(p-dioxanone), and the mass ratio of POM to PLA to poly(p-dioxanone) is (60-80):(12-30):(3-15). The preparation method comprises steps as follows: the three polymers are dried to reach constant weights, extruded by a screw, pass a pre-filter, a box body and an assembly, cooled in a spinning channel and wound, as-spun fibers are subjected to backend heat drawing and heat setting, and the composite fibers are obtained. The composite fibers have good mechanical performance, heat resistance and proper degradability and have a good application prospect.

Description

technical field [0001] The invention relates to a composite fiber, in particular to a polyoxymethylene-polylactic acid-polydioxanone ternary composite fiber and a preparation method thereof. Background technique [0002] Polyoxymethylene (POM) fiber inherits the excellent properties of POM raw materials, and has high strength and high modulus, excellent wear resistance, alkali resistance, and high elongation recovery characteristics; especially POM fiber has excellent impact durability and is resistant to Scratch breakability is good. At the same time, the molecular structure of POM fiber contains a large number of ether bonds, which has good compatibility with various materials and high bonding strength, so POM fiber can be used for composite material reinforcement. [0003] However, POM resin has the characteristics of poor thermal stability, fast crystallization speed, and high crystallinity, which are the bottlenecks restricting fiber preparation. Scholars and scientif...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F8/16D01D13/00
CPCD01D13/00D01F8/14D01F8/16
Inventor 阳知乾刘加平徐德根刘建忠吕进张丽辉张爱民叶光斗周涛
Owner 镇江吉邦材料科技有限公司
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