Production method of polyamide-6 fiber

Abstract

The invention discloses a production method of polyamide-6 fiber. The production method comprises the following steps: a, adding polyamide-6 chips to a screw extruder, and carrying out melted extrusion; b, spinning; c, carrying out cooling forming on silk bundles by using cross air blow by using a cross air blow spinning cooling device and oiling the cooled silk bundles, wherein the cross air blow to the silk bundles in the cross air blow spinning cooling device is divided into an upper layer and a lower layer which are independent of each other, wherein the upper layer of cross air blow is obliquely blown out upwards, and the lower layer of cross air blow is taken as a main body and horizontally blown out from a cross air blow cylinder; d, carrying out pre-interlacing, drafting, interlacing and winding; e, carrying out inspection package. According to the production method disclosed by the invention, the cross air blow is adopted to substitute for side air blow, so that a melt is uniformly cooled in each direction; the phenomenon that the inner layers and the outer layers of the silk bundles cannot be uniformly cooled is effectively avoided, and the unevenness rate of the silk bundles is reduced, so that the molding quality of the silk bundles is greatly improved; the polyamide-6 fiber prepared by the production method disclosed by the invention is excellent in various performances and has favorable market competitiveness.

Description

technical field [0001] The invention relates to a production method of chemical fibers, in particular to a production method of nylon 6 fibers. Background technique [0002] The main species of nylon is aliphatic polyamide fiber, which can be synthesized from a monomer, such as lactam or amino acid. At this time, the Arabic numerals after the nylon name indicate the number of carbon atoms of the lactam or amino acid used, such as nylon 6, nylon 66, etc. Nylon 6 is polycaprolactam fiber. This concept was disclosed on page 412 of the second printing of the first edition of "Chemical Fiber Dictionary" in 1995: polycaprolactam fiber is referred to as polycaprolactam fiber in my country. Filament, textured filament and short fiber, etc., are produced by melt direct spinning or chip spinning. Nylon 6 products have the characteristics of high strength, wear resistance, softness and gentle skin touch, etc., and have broad applications in the fields of clothing, silk, umbrellas, fi...

AI Technical Summary

Problems solved by technology

Chinese patent ZL201220462989.4 discloses a new type of ring blowing device, which is different from the traditional new type of ring blowing device in that the cooling air blown in from the air inlet pipe runs upwards under the obstruction of the inner cylinder, and is rectified and evened by the double-layer flat screen. After the action, it finally enters the surrounding blower. Its advantage over the prior art is that it can make the cooling air in the surrounding blower more uniform. The disadvantage is that the cooling performance is not good. With the spinning down at a high speed, the surrounding blowing is easy The belt is skewed, especially the cooling effect is not good in the ejection section of the primary fiber, so it needs to be improved

Images