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Novel preparation technology of polyoxymethylene fiber

A technology of polyoxymethylene fiber and polyoxymethylene, applied in fiber processing, stretch spinning, filament/thread forming, etc., can solve the problem of not being able to adapt to the change of velocity gradient in the deformation area under the plate, the uniformity of fiber structure and the stability of performance Insufficient resistance and other problems, to achieve the effect of preventing melt fracture, prolonging the deformation time of viscous flow, and reducing temperature fluctuation

Inactive Publication Date: 2011-07-27
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of this invention is that it cannot adapt to the change of the velocity gradient in the deformation area under the plate, and the uniformity of the fiber structure and the stability of the performance are not enough

Method used

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  • Novel preparation technology of polyoxymethylene fiber
  • Novel preparation technology of polyoxymethylene fiber
  • Novel preparation technology of polyoxymethylene fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] POM pellets with a melt index of 1.8 g / 10 min as measured by ASTM D1238 were dried for 4.5 hours at a temperature of 115°C and a vacuum of -0.1 MPa. The pellets are heated and melted by the screw extruder, and then melted and extruded by the spinneret after being metered by the metering pump. The zone is 217°C, the metering zone is 216°C; the spin beam is 216°C. The melt flow passes through the four-stage slow cooling, and the slow cooling device: the first-stage slow cooling, the air temperature is 220°C, and the action range is 1-160mm under the spinneret plate; the second-stage slow cooling, the air temperature is 175°C, the effect The interval is 161-220mm under the spinneret plate; the third-stage slow cooling, the air temperature is 140°C, and the action range is 221-280mm under the spinneret plate; the fourth-stage slow cooling, the air temperature is 100°C, and the action interval is The distance under the spinneret plate is 281-450mm; and high-speed traction i...

Embodiment 2

[0028]Other conditions are as embodiment 1, just change the temperature of the slow cooling device: first-level slow cooling, the air temperature is 210°C; second-level slow cooling, the air temperature is 170°C; third-level slow cooling, the air temperature is 130°C; Cold, the ambient temperature is 90°C. At this time, the as-spun fiber is stretched by hot air and then stretched by two different solvents. The first stage of hot air stretching has a draw ratio of 3.4; the second stage of water bath stretching has a draw ratio of 2; the third stage of oil Bath stretching, the stretching ratio is 1.6. The resulting POM fiber has the best uniformity, high strength and modulus, and stable performance.

Embodiment 3

[0030] Other conditions are as embodiment 1, just change the temperature of the slow cooling device: first-level slow cooling, the air temperature is 190°C; second-level slow cooling, the air temperature is 150°C; third-level slow cooling, the air temperature is 100°C; Cold, the ambient temperature is 80°C. At this time, the as-spun fiber is stretched by hot air and then stretched by two different solvents. The first stage of hot air stretching has a draw ratio of 3.2; the second stage of water bath stretching has a draw ratio of 1.9; the third stage of oil Bath stretching, the stretching ratio is 1.4. The uniformity of the obtained POM fiber is average, the strength and modulus are not high, and the performance is relatively stable.

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Abstract

The invention relates to a novel preparation method of polyoxymethylene fiber, in particular to the novel preparation method of the polyoxymethylene fiber via multi-stage slow cooling and three-stage drawing with different media, which comprises the following steps: vacuum-drying polyoxymethylene granular materials, heating and melting via a screw extruder, melting and extruding by a spinneret, leading small melt flow to pass through the multi-stage slow cooling, carrying out high-speed traction, passing through a moistening and oiling cluster, winding, then obtaining as-spun fiber, carrying out hot air drawing and two times of drawing with different types of solvent, then carrying out hot molding and finally preparing the polyoxymethylene fiber. The novel preparation technology can solve the problems of matching between the multiple sections of atmosphere and temperature and the spinning process control and the control of the drawing with multiple media and make up for the deficiencies that the single atmosphere and temperature and the single medium drawing of the prior art lead the structure to be difficult to stable and uniform.

Description

technical field [0001] The invention relates to a novel preparation method of polyoxymethylene fibers, in particular to a novel preparation method of polyoxymethylene fibers subjected to multi-stage slow cooling and three-stage stretching with different media. Background technique [0002] Polyoxymethylene (POM) is a high-density, highly crystalline fiber with excellent comprehensive properties. The polyoxymethylene fiber prepared from polyoxymethylene inherits most of the advantages of polyoxymethylene and can give full play to the potential advantages of polyoxymethylene. Polyoxymethylene fiber has the characteristics of high rigidity and high strength; it is also resistant to abrasion, has good dimensional stability, good durability, and can be used for a long time; it has excellent chemical resistance, especially alkali resistance. [0003] EP2006000118 discloses a method of producing POM monofilaments with excellent bend recovery. The method includes extruding the POM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/088D01D5/096D01D5/12D01D10/02
Inventor 倪建华王依民文珍稀陈兴福王艳萍戴东鹏王琳夏于旻陆燕飞冯强
Owner DONGHUA UNIV
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