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Environmental-friendly polymer monofilament, and production method thereof

A production method and polymer technology, which are applied in the directions of single-component polyamide rayon, stretch spinning, melt spinning, etc., can solve the problem that the amorphous part cannot be fixed, the orientation crystallization is difficult to occur, and the crystallinity is low. And other issues

Inactive Publication Date: 2018-06-08
HAIAN KEHAO TEXTILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, compared with polyamide homopolymers, polyester amide copolymers have lower crystallinity, are less likely to undergo oriented crystallization, or have a slower crystallization rate.
Therefore, although the amorphous state obtained by rapid cooling can be stretched into a drawn wire, the orientation of the amorphous part cannot be sufficiently fixed, and the mechanical strength has never been sufficiently improved.
[0004] At present, there is no report of using polyester amide as a raw material to prepare large-diameter monofilaments by melt spinning.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Use polyester amide (U.S. Dupont) resin with a molecular weight of 25,000 to dry on a dryer to a moisture content of ≤45ppm, and a drying temperature of 130°C; Silk, the melt temperature is 260°C; the primary silk is cooled to 30°C by 10°C water; the cooled primary silk is stretched in a hot water bath, the stretching ratio is 4.0 times, and the hot water temperature is 70°C; Then carry out two hot air stretching, the stretching ratio is 1.2 times, and the temperature is 70°C; after the as-spun yarn is stretched, it is heat-set at 185°C; then it is wound onto the bobbin at a speed of 90m / min.

[0027] The monofilament obtained in this example has a diameter of 0.12 mm, a breaking strength of 3.8 CN / dtex, and a breaking elongation of 27.8%, (61.5% soil moisture, 27°C temperature, 29 days, and a degradation rate of 3.4%).

Embodiment 2

[0029] Use 96wt% molecular weight to be 30000 polyester amide (U.S. DuPont) raw materials and 4wt% nano-titanium dioxide mix evenly, dry to moisture content≤45ppm on drier, drying temperature is 140 ℃; The extrusion rate of kg / hour is melted and extruded to obtain as-spun silk, and the melt temperature is 265°C; the as-spun silk is cooled to 40°C through the emulsion at 20°C; the cooled as-spun silk is stretched in a hot water bath, drawn The stretch ratio is 4.5 times, and the hot water temperature is 75°C; then two hot air stretches are carried out, the stretch ratio is 1.4 times, and the temperature is 140°C; after the as-spun yarn is stretched, it is heat-set at 200°C; and then 120m / min The speed is wound onto the bobbin.

[0030] The monofilament obtained in this example has a diameter of 0.15 mm, a breaking strength of 4.1 CN / dtex, a breaking elongation of 26.7%, a soil humidity of 61.5%, a temperature of 27°C, and a degradation rate of 3.6% in 29 days.

Embodiment 3

[0032] Use 96wt% molecular weight to be 35000 polyester amide (U.S. Du Pont) raw material and 4wt% nano-calcium carbonate mix evenly, be dried to moisture content≤45ppm on drier, and drying temperature is 150 ℃; The as-spun silk was melt-extruded at an extrusion rate of 50 kg / hour, and the melt temperature was 270°C; the as-spun silk was cooled to 40°C by 20°C water; the cooled as-spun silk was drawn together in a hot water bath, The draw ratio is 5.0 times, and the hot water temperature is 80°C; then two hot air stretches are carried out, the draw ratio is 1.4 times, and the temperature is 140°C; after the as-spun yarn is stretched, it is heat-set at 210°C; and then 130m / min The speed is wound onto the bobbin.

[0033] The monofilament obtained in this example has a diameter of 0.18 mm, a breaking strength of 4.3 CN / dtex, a breaking elongation of 25.6%, a soil humidity of 61.5%, a temperature of 27°C, and a degradation rate of 3.5% in 29 days.

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Abstract

The invention discloses an environmental-friendly polymer monofilament, and a production method thereof. The diameter of the environmental-friendly polymer monofilament ranges from 0.25 to 1.5mm, thebreaking tenacity is larger than 4.5CN / dtex, the elongation at break ranges from 25 to 40%, after 29 days, the degradation rate at 27 DEG C when soil humidity is 61.5% is equal to or larger than 3.5%.The preparation method comprises following steps: polyesteramide resin is mixed with an additive, an obtained mixture is subjected to extrusion using a screw fusion extruder; water cooling is adoptedfor cooling of a molten body obtained via extrusion so as to obtain primary filament; the primary filament is subjected to hot water extrusion, hot wind extrusion, and hot moulding so as to obtain the environmental-friendly polymer monofilament. The environmental-friendly polymer monofilament is high in strength and toughness, the preparation process is simple, the cost is low, and the environmental-friendly polymer monofilament is suitable for fields such as fishery and agriculture.

Description

technical field [0001] The invention relates to a polymer monofilament, in particular to an environmentally friendly polyester amide monofilament and a method for producing the monofilament. Background technique [0002] In general, fishing lines, fishing nets, and agricultural nets are made of synthetic fibers such as polyamide monofilaments that are excellent in processability, strength, durability, and heat resistance. However, such synthetic fibers do not have the ability to decompose in natural environments. It will cause serious marine pollution and other problems. Most natural fibers are biodegradable, but cannot exhibit high performance such as high strength required for fishing lines, fishing nets, and agricultural nets. [0003] Polyesteramide combines the advantages of polyester and polyamide. It is not only biodegradable, but also has excellent physical and mechanical properties such as high strength and heat resistance. However, to manufacture polyester amide ...

Claims

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Application Information

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IPC IPC(8): D01F6/90D01F1/10D01D10/02D01D5/14D01D5/088D01D5/08
CPCD01F6/90D01D5/08D01D5/0885D01D5/14D01D10/02D01F1/10
Inventor 李玉清
Owner HAIAN KEHAO TEXTILE CO LTD
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