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A kind of preparation method of polyamide superfine fiber net

A technology of ultrafine fiber and polyamide, which is applied in the field of spinning materials, can solve problems such as the complex production process of melt blown materials, and achieve the effects of excellent fluidity, excellent wear resistance, and drape

Active Publication Date: 2019-07-26
山东滨州红叶网业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the complicated production process of melt-blown materials, including feeding, screw melt extrusion, filtration, die spinning, high-temperature and high-speed air drafting to form ultra-fine fibers, and then bonding on the web curtain, the melt-blown non-woven fabrics can be obtained after cooling. For woven fabrics, the process parameters of each link are very important. So far, there is no relevant information on the melt-blown process of polyamide 66 as raw material.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A kind of preparation method of polyamide superfine fiber net
  • A kind of preparation method of polyamide superfine fiber net
  • A kind of preparation method of polyamide superfine fiber net

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The preparation steps of the present invention include slice drying, feeding, screw melt extrusion, filtration, precise metering by metering pumps, die spinning, high-temperature and high-speed airflow drafting and web forming, and the specific steps are as follows:

[0029] (1) PA66 is heated and dried by vacuum dryer 1, the drying temperature is 80°C, and the drying time is 36h. Afterwards, PA66 is sliced, and the moisture content of PA66 after drying is controlled between 500ppm; PA66 is medium viscosity and melting point is 280.94°C , the melt mass flow rate is 160g / 10min under the conditions of 295°C and 2840g load, the average relative molecular weight of PA66 is 20000, the relative viscosity is 2.8, the dispersion index is 1.85, and the extractable content in PA66 is ≤0.6%;

[0030] (2) The step (1) PA66 slice 2 is transported to the feed hopper 3 by dry air flow;

[0031] (3) In step (2), the PA66 slices enter the screw extruder 4 from the feed hopper 3 for melt...

Embodiment 2

[0038] The preparation steps of the present invention include slice drying, feeding, screw melt extrusion, filtration, precise metering by metering pumps, die spinning, high-temperature and high-speed airflow drafting and web forming, and the specific steps are as follows:

[0039] (1) PA66 is heated and dried by vacuum dryer 1, the drying temperature is 85°C, and the drying time is 30h. Afterwards, PA66 is cut into slices, and the moisture content of PA66 after drying is controlled between 600ppm; PA66 is medium viscosity and melting point is 280.94°C , the melt mass flow rate is 170g / 10min under the conditions of 295°C and 2840g load, the average relative molecular weight of PA66 is 21000, the relative viscosity is 2.9, the dispersion index is 1.90, and the extractable content in PA66 is ≤0.6%;

[0040] (2) The step (1) PA66 slice 2 is transported to the feed hopper 3 by dry air flow;

[0041] (3) In step (2), the PA66 slices enter the screw extruder 4 from the feed hopper (...

Embodiment 3

[0047] The preparation steps of the present invention include slice drying, feeding, screw melt extrusion, filtration, precise metering by metering pumps, die spinning, high-temperature and high-speed airflow drafting and web forming, and the specific steps are as follows:

[0048] (1) PA66 is heated and dried by vacuum dryer 1, the drying temperature is 90°C, and the drying time is 24h. Afterwards, PA66 is cut into slices, and the moisture content of PA66 after drying is controlled between 800ppm; PA66 is medium viscosity and melting point is 280.94°C , the melt mass flow rate is 180g / 10min under the conditions of 295°C and a load of 2840g, the average relative molecular weight of PA66 is 22000, the relative viscosity is 3.0, the dispersion index is 1.95, and the extractable content in PA66 is ≤0.6%;

[0049] (2) The step (1) PA66 slice 2 is transported to the feed hopper 3 by dry air flow;

[0050] (3) In step (2), the PA66 slices enter the screw extruder 4 from the feed hop...

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Abstract

The invention provides a preparation method of a polyamide ultrafine fiber web. The preparation method includes the steps of drying, feeding, screw melt extruding, filtering, accurately metering with a metering pump, die spinning, high-temperature and high-speed air drawing and web forming. Compared with regular melt-blown materials, the melt-blown ultrafine fiber web has good corrosion resistance and high-temperature resistance and is widely applied for filtering corrosive liquid or oils. Besides, compared with regular products, PA66 melt-blown products have sound wear-resisting property and high filament strength. The filament strength of normal melt-blown PP fibers is about 1.5cN / dtex while the filament strength of PA66 fibers is 3.5cN / dtex. Thus, the strength of PA66 melt-blown non-woven fabric is much higher than that of polyamide melt-blown non-woven fabric.

Description

technical field [0001] The invention belongs to the field of spinning materials, and in particular relates to a preparation method of a polyamide ultrafine fiber web. Background technique [0002] Polyamide 66 (PA66) not only has the characteristics of high temperature resistance, self-lubrication, and high mechanical strength, but also has outstanding oil and chemical corrosion resistance, especially excellent toughness and wear resistance. Widely used in the production of clothing, carpets, tire cords, etc. PA66 has good fuel resistance and can be used to produce fuel filter screens and fuel filters; in addition, PA66 has good impact resistance and toughness, and it can be used to make radiator water tanks that can withstand the impact of gravel when cars are driving. In addition, PA66 is also used in some precision instruments, such as blood transfusion, blood collection, infusion set; transmission gear of electronic typewriter; belt filter of printing machine, etc. [...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4334D04H1/72D01D1/04D01D5/08
CPCD01D1/04D01D5/08D04H1/4334D04H1/72
Inventor 闫新石素宇王利娜迟长龙孟书超
Owner 山东滨州红叶网业有限公司
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