A kind of preparation method of polyketone-polyoxymethylene composite fiber

A composite fiber and polyoxymethylene technology, applied in fiber treatment, fiber chemical characteristics, conjugated synthetic polymer artificial filament, etc., can solve the problems of poor deformation ability of polyoxymethylene, difficult high-performance polyoxymethylene fiber, etc., to achieve excellent mechanical properties The effect of performance, simple preparation process and strong practicability

Active Publication Date: 2019-03-08
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing polyketone-polyoxymethylene composite fibers reinforced with polyketone. The polyketone used in the invention is an environmentally friendly polymer compound that is copolymerized by carbon monoxide, ethylene, and propylene under the action of a catalyst. , has excellent mechanical properties, its tensile strength is 1.07 times that of polyoxymethylene, its impact strength is 1.85 times that of polyoxymethylene, and its elongation at break is 7.7 times that of polyoxymethylene, which can solve the problem of poor deformation ability of polyoxymethylene and difficulty in high-speed drafting Problems in preparing high performance polyoxymethylene fiber

Method used

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  • A kind of preparation method of polyketone-polyoxymethylene composite fiber
  • A kind of preparation method of polyketone-polyoxymethylene composite fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of raw materials: heat up the high-speed mixer to 130°C, weigh 1000g of POM, 1g of antioxidant 1010, and 50g of POK raw materials into the mixer, start stirring and mixing for 2 minutes, and then put the mixture in the twin-screw extruder Extrude and granulate in middle to obtain spinning polyketone-polyoxymethylene modified material. The POK melt index is 60g / 10min, the tensile strength is 75MPa, and the notched impact strength is 12.8KJ / m 2 , Elongation at break 350%.

[0028] Fiber preparation: Spin the polyketone-polyoxymethylene modified material in the melt spinning machine, and wind it through the screw extruder, melt filter, spinning box and components to obtain the primary fiber. at 220°C, the winding speed of the as-spun fiber is 200m / min, and then the as-spun yarn is subjected to two-stage thermal drawing at 120°C and 140°C respectively, and then relaxes and heat-sets at 145°C for 1min to obtain polyketone-polyoxymethylene Composite fibers.

Embodiment 2

[0030] Preparation of raw materials: Heat the high-speed mixer to 130°C, weigh 1000g of POM, 1g of antioxidant 1010, 2g of antioxidant 245, and 100g of POK raw materials into the mixer, start stirring and mixing for 2 minutes, and then put The mixture is extruded and granulated in a twin-screw extruder to obtain a spinning polyketone-polyoxymethylene modified material. POK melt index is 80g / 10min, tensile strength is 70MPa, notched impact strength is 13.8KJ / m 2 , Elongation at break 275%.

[0031] Fiber preparation: Spin the polyketone-polyoxymethylene modified material in the melt spinning machine, and wind it through the screw extruder, melt filter, spinning box and components to obtain the primary fiber. at 225°C, the winding speed of the as-spun fiber is 1000m / min, and then the as-spun yarn is subjected to two-stage thermal stretching at 140°C and 160°C respectively, and then relaxes and heat-sets at 145°C for 1.5min to obtain a POK / POM composite fiber.

Embodiment 3

[0033] Preparation of raw materials: Heat the high-speed mixer to 130°C, weigh 1000g of POM, 5g of antioxidant 168, 5g of antioxidant 245, and 200g of POK raw materials into the mixer, start stirring and mixing for 2 minutes, and then release the mixture Extrude and granulate in a twin-screw extruder to obtain a spinning polyketone-polyoxymethylene modified material. The POK melt index is 200g / 10min, the tensile strength is 50MPa, and the notched impact strength is 14.5KJ / m 2 , Elongation at break 250%.

[0034] Fiber preparation: Spin the polyketone-polyoxymethylene modified material in the melt spinning machine, and wind it through the screw extruder, melt filter, spinning box and components to obtain the primary fiber. at 240°C, the winding speed of the as-spun fiber is 1500m / min, and then the as-spun yarn is subjected to two-stage thermal stretching at 140°C and 160°C respectively, and then relaxes and heat-sets at 140°C for 2 minutes to obtain a POK / POM composite fiber ...

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Abstract

The invention discloses a polyketone-polyformaldehyde composite fiber preparation method. The polyketone-polyformaldehyde composite fiber preparation method mainly includes steps: mixing polyketone and polyformaldehyde in a high-speed mixer, adding a heat stabilizer, extruding and granulating in a screw extruder, adopting a melt spinning machine for melt spinning, and performing secondary hot drawing and heat setting to obtain polyketone-polyformaldehyde composite fibers. By adoption of high-deformability polyketone, deformability of the composite fibers is improved, total draft multiple of the composite fibers is increased, and mechanical properties of the polyformaldehyde fibers are improved. In addition, the method is simple in process, free of special equipment and easy for realization of industrialization.

Description

technical field [0001] The invention relates to a preparation method of high-strength and high-modulus polyoxymethylene fibers, in particular to a preparation method of polyketone-polyoxymethylene composite fibers of polyketone-reinforced polyoxymethylene. technical background [0002] Polyoxymethylene (POM) is a high-performance linear polymer with good mechanical properties and excellent chemical resistance. The fibers prepared by stretching POM resin through high draw ratio have good tensile strength and elastic modulus, which can be Give full play to the potential of POM structural materials and meet broader application requirements. [0003] At present, the research on POM fiber mainly focuses on three aspects: changing the chemical structure, controlling the processing technology and adding modifiers. For example, by introducing the content of the third polymerized monomer, changing the molecular structure of polyoxymethylene, changing the half-crystallization time, r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/16D01F1/10D01D5/08D01D5/30D01D5/12D01D10/02
CPCD01D5/08D01D5/12D01D5/30D01D10/02D01F1/10D01F8/16
Inventor 徐德根刘建忠刘加平阳知乾张丽辉吕进
Owner JIANGSU SOBUTE NEW MATERIALS
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