Preparation method of ultra-high strength polypropylene hollow fiber membrane
An ultra-high-strength, polypropylene technology, used in the manufacture of hollow filaments, single-component polypropylene rayon, fiber processing, etc. The effect of high separation accuracy
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Embodiment 1
[0014] Embodiment 1 of the present invention: the preparation method of ultrahigh-strength polypropylene hollow fiber membrane comprises the following steps:
[0015] 1) Spinning of polypropylene hollow fiber: The drawing grade homopolypropylene is spun through a spinning machine, and the temperature of each section of the spinning machine from the feeding port to the machine head is controlled as: 170°C, 180°C, 190°C, 200°C, 200°C, 200°C, 200°C; Nitrogen is used as the chamber fluid, and the flow rate is 0.06L / min; the cooling process uses short-distance air cooling first, the air temperature is 20°C, and the length of air cooling is 1m, and then adopts Solvent cooling, solvent cooling uses non-polar cyclohexane 1,2-diisononyl dicarboxylate as the cooling solvent, the solvent temperature is 15°C; after cooling, it is wound into hollow fibers, and the winding speed during spinning is 350m / min, obtain a polypropylene hollow fiber with a 0.5 micron thick lamellar structure;
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Embodiment 2
[0017] Embodiment 2 of the present invention: the preparation method of ultrahigh-strength polypropylene hollow fiber membrane comprises the following steps:
[0018] 1) Spinning of polypropylene hollow fiber: high melt strength homopolypropylene (melt index 0.35g / 10min) is spun through a spinning machine, and the temperature of each section of the spinning machine is controlled from the feeding port to the machine head For: 170°C, 180°C, 190°C, 200°C, 200°C, 200°C, 200°C, 190°C; Nitrogen is used as the chamber fluid, and the flow rate is 0.06L / min; The temperature is 20°C, the air cooling length is 1.5m, and then solvent cooling is used. The solvent cooling uses non-polar cyclohexane 1,2-diisononyl dicarboxylate as the cooling solvent, and the solvent temperature is 15°C; after cooling Winding into a hollow fiber, the winding speed in the spinning process is 350m / min, to obtain a polypropylene hollow fiber with a 0.5 micron thick lamellar structure;
[0019] 2) Preparation o...
Embodiment 3
[0020] Embodiment 3 of the present invention: the preparation method of ultrahigh-strength polypropylene hollow fiber membrane comprises the following steps:
[0021] 1) Spinning of polypropylene hollow fiber: high melt strength homopolypropylene (melt index 0.3g / 10min) is spun through a spinning machine, and the temperature of each section of the spinning machine is controlled from the feeding port to the machine head For: 170°C, 180°C, 190°C, 200°C, 200°C, 200°C, 200°C, 190°C; Nitrogen is used as the chamber fluid, and the flow rate is 0.06L / min; The temperature is 20°C, the air cooling length is 2m, and then solvent cooling is used. The solvent cooling uses non-polar cyclohexane 1,2-diisononyl dicarboxylate as the cooling solvent, and the solvent temperature is 15°C; after cooling, the volume Winding into a hollow fiber, the winding speed in the spinning process is 350m / min, to obtain a polypropylene hollow fiber with a 0.5 micron thick lamellar structure;
[0022] 2) Prep...
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Abstract
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