Vertical atomized chemical fiber molding method

Abstract

The invention belongs to the field of manufacturing of chemical fibers and particularly relates to a vertical atomized chemical fiber molding method. The vertical atomized chemical fiber molding method comprises the following steps that: 1, spinning raw materials enter a spinneret plate of a spinning assembly after passing through a distributing pipe, a metering pump and a filter; 2, an air gap is used for cooling; 3, cooling and solidification is carried out in a solidification chamber; 4, bunching bath is carried out; and 5, post processing is carried out. In the invention, the cooling and solidification are uniform so as to avoid causing fibrillation. The mechanical property of the obtained strand silk is special. A distance from the surface of the spinneret plate to the surface of bunching solution is more than 500mm and the making-up operation is convenient. The spinning speed can reach 200 to 350m per minute so as to greatly improve the productivity, save equipment investment and civil engineering investment and reduce operation cost. The vertical atomized chemical fiber molding method can be popularized and applied to the cooling and molding of heavy denier melt spun fibers (more than 20 deniers per piece) which cannot be spun by the conventional air serving as a cooling medium.

Description

technical field [0001] The invention belongs to the field of chemical fiber manufacturing, and in particular relates to a vertical fog type chemical fiber forming method. Background technique [0002] Fibers are processed from natural or synthetic polymers into slender and flexible substances. Classified from the source of raw materials, chemical fibers can be divided into two categories: recycled fibers and synthetic fibers. Synthetic fibers are fibers spun from synthetic polymers (resins), among which polyester fibers, which account for more than 60% of the total amount of synthetic fibers, are polyester fibers, also known as polyester. There are also polyamide (nylon), polypropylene (propylene fiber), polyacrylonitrile (acrylic fiber), etc.; secondly, polyvinyl alcohol (vinylon), polyurethane (spandex), etc. Regenerated fiber is a fiber made from natural polymers through physical or physical and chemical treatment with special equipment, such as: cellulose fiber (cotton...

AI Technical Summary

Problems solved by technology

[0012] The disadvantages are (1) The air gap control technology is affected by the air gap length, air flow velocity, air flow temperature, and air flow medium recovery cost, which is very difficult

(2) The primary filament and the air in the air gap only undergo heat exchange and the surface is initially cooled and solidified before entering the coagulation bath. Due to the influence of the mass transfer speed between the interior of the filament and the bath, the increase in spinning speed is limited to a certain extent.

(3) If the air gap is too large, the surface of the primary fiber is solidified too quickly, which is prone to fibrillation and affects the spinnability of the subsequent process; if the air gap is too small, the curing effect is not obvious, and the distance between the spinneret surface and the liquid surface is too small, The spin-up operation is carried out under the liquid, which is relatively difficult, which restricts the increase in the number of spinneret holes. According to the disclosed information, the spinneret holes can reach up to 30,000 holes / bit

This part of equipment investment, civil construction land occupation and energy consumption are very high

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