A kind of high-strength ultrafine polyamide 11 fiber and its preparation method
A high-strength, fiber technology, applied in the field of high-strength ultrafine polyamide 11 fiber and its preparation, can solve the problems of low output, difficulty in industrialization, low strength of PA11 fiber, etc., and achieves high laser energy, reduced heating area, and increased ordered structure. Effect
Active Publication Date: 2021-09-28
仪征市仲兴环保科技有限公司
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Problems solved by technology
[0003] At present, ultrafine PA11 fibers are mainly prepared by solution electrospinning[ Dhanalakshmi , M.; Lele , A.K.; Jog , J.P.Electrospinning of Nylon11:Effect of processing parameters on morphology and microstructure.Materials Today Communications 2015,3,141-148.], but the strength of the PA11 fiber prepared by this method is low, and the yield is low, and industrialization is difficult
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Embodiment 1
[0032] A preparation method of high-strength ultrafine PA11 fibers, comprising the steps of:
[0033] (1) D-LA content is 10% PLA (viscosity average molecular weight is 2.5 * 10 5 ) in a vacuum oven at 60 ° C for 36 hours for later use, PA11 (viscosity average molecular weight is 3.0 × 10 5 ) was dried in a vacuum oven at 80°C for 24 hours for subsequent use;
[0034] (2) Weigh PLA and PA11 raw materials according to the spinning composite ratio of 10:90 and add them to the corresponding hopper of the composite spinning machine, melt spinning, side blowing cooling, oiling, winding, online stretching, heat setting The sea-island type PLA / PA11 composite fiber was obtained; wherein, the melt extrusion temperature of the sea component was 170°C, the melt extrusion temperature of the island component was 200°C, the side blowing temperature was 25°C, the relative humidity of the cooling air was 50%, and the side blowing The speed is 1.5m / s; the spinning speed is 5000m / min, the win...
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Abstract
The invention discloses a high-strength ultrafine polyamide 11 fiber and a preparation method thereof, belonging to the field of polymer materials. The preparation method of the present invention comprises the following steps: (1) According to the composite spinning ratio, the sea component PLA and the island component PA11 are added to the corresponding hopper of the composite spinning machine to perform composite spinning, and then cooled by melt spinning and side blowing , oiling, winding, online stretching, and heat setting to obtain the sea-island type PLA / PA11 composite fiber; wherein, the melt index of PLA is greater than the melt index of PA11; (2) the sea-island type PLA / PA11 composite fiber is processed in a solvent Treatment to remove the sea component PLA to produce high-strength ultra-fine PA11 fibers. The strength of the ultra-strong high-fine fiber of the invention can reach more than 3.2cN / dtex, the elongation at break can reach less than 38%, and the linear density can reach less than 0.55dtex.
Description
technical field [0001] The invention relates to a high-strength ultrafine polyamide 11 fiber and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] The raw material of polyamide 11 (PA11) is castor oil, and the resource is renewable. It has the characteristics of good oil resistance, low water absorption, good dimensional stability, low temperature resistance and excellent electrical insulation performance. It can be used for submarine oil pipelines, seawater purification, oil Filtration and many other demanding fields. For seawater purification, oil filtration and other fields, PA11 is best in the form of fibers, and the finer the fibers, the better the filtration performance, the higher the strength, and the longer the service life. Therefore, the development of high-strength ultrafine PA11 fibers has broad prospects. [0003] At present, ultrafine PA11 fibers are mainly prepared by solution electrospinning[ Dhanalak...
Claims
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IPC IPC(8): D01F6/60D01F8/14D01F8/12D01F11/08D01D10/02D01D5/30D01D5/12
CPCD01D5/12D01D5/30D01D10/02D01F6/60D01F8/12D01F8/14D01F11/08
Inventor 刘庆生邓炳耀李大伟董金铧
Owner 仪征市仲兴环保科技有限公司