Process and apparatus for manufacturing vinylon filament

Abstract

The related preparation method for vinylon filament comprises: spinning the dope polyvinyl alcohol by a large-capacity spinning machine into multi-sheet large-fold primary tow; drafting with guide roller, hot-wet drafting, dry-hot drafting, tension thermal treating, shrinking, cooling, folding, winding and obtaining the vinylon filament; finally, cutting into staple fiber. This invention can treat one or more yarns, has large productivity with low cost, and fit to build the 3000-5000ton large-capacity vinylon spinning product line or technical innovation.

Description

technical field [0001] The invention relates to a method and a device for manufacturing a vinylon filament bundle. Background technique [0002] At present, the process of manufacturing vinylon filament bundles is: extruding polyvinyl alcohol spinning stock solution with a concentration of about 15% to 16% (wt) from the micropores of the spinneret into a saturated sodium sulfate coagulation bath, dehydrating and coagulating into Nascent fiber bundles, the nascent fiber bundles are processed by guide roller drafting, wet heat drafting, drying, preheating, dry heat drafting, tension heat treatment and optional shrinkage heat treatment, so that the fibers are oriented and crystallized, and become a fiber with certain mechanical properties. vinylon filament tow. Vinylon filament bundles are cut into short fibers by a cutting machine for post-treatment processes such as hot water crimping, optional acetalization, washing, oiling, drying, and packaging, etc., and become available...

AI Technical Summary

Problems solved by technology

Due to the long length of the spinning machine arranged longitudinally, it is difficult to increase the production capacity by blindly increasing the spinning position, and because wet spinning is a low-speed spinning process, so this spinning machine Destined to be a small-capacity spinning machine, the production capacity is relatively low, about 1500-2000 tons / year

[0015] 2. There are many guide roller drafting machines, and the utilization rate is low, which increases the production cost

For example, in order to dry tows with a denier of about 250,000 to 400,000 deniers, the required heating temperature is about 260 to 300°C and the time is about 150 to 200 seconds, making it difficult to produce fibers with a good hue

[0017] 4. In addition, in this typical double-sided production line, all equipment is arranged on the left and right sides. Compared with the single-sided production line, the operation capacity and labor costs are doubled, and the production cost is higher.

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