Production process of superfine composite fiber

Abstract

The Haidao superfine composite fiber producing process includes pre-crystallization of Dacron polyester slice and low smelting point polyester slice in a pre-crystallizer, drying in a drying tower, heating extrusion and smelting in a screw extruder to form spinnable melt, measuring in spinning measuring pump, distributing the two kinds of melt for homogeneous mixing, jetting out from the spinning jet, cooling to form, bundling and oiling, passing through spinning channel and winding by winder to form Haidao composite fiber bundle.

Description

(1) Technical field [0001] The invention belongs to a chemical fiber production process, in particular to a superfine composite fiber production process. (2) Background technology [0002] my country is a big country of chemical fiber production, with an annual chemical fiber production capacity of about 6 million tons. Among them, 80% of chemical fiber enterprises have small production scales and low-grade products, making it difficult to participate in international market competition. The current 15% has increased to more than 30%. Sea-island microfiber is one of the main high-grade differential fiber varieties and is the main raw material for the production of high-end clothing fabrics. my country's textile enterprises have formed a certain production scale of high-end clothing fabrics. We have not mastered the production technology of sea-island microfiber, so we can only rely on imports, which limits the application and development of our country's sea-island fiber field...

AI Technical Summary

Problems solved by technology

[0002] my country is a big country of chemical fiber production, with an annual chemical fiber production capacity of about 6 million tons. Among them, 80% of chemical fiber enterprises have small production scales and low-grade products, making it difficult to participate in international market competition. The current 15% has increased to more than 30%. Sea-island microfiber is one of the main high-grade differential fiber varieties and is the main raw material for the production of high-end clothing fabrics. my country's textile enterprises have formed a certain production scale of high-end clothing fabrics. I have not mastered the production technology of sea-island microfiber, so I can only rely on imports, which limits the application and development of my country's sea-island fiber field

One of the main raw materials of sea-island fiber is low-melting polyester chip, which has a low melting point and slow crystallization speed, and the agglomeration phenomenon is serious during pre-crystallization, which cannot be produced normally. There is no mature technology for this in China

Island-in-the-sea fiber spinning consists of two melts entering the same spinning assembly at two different temperatures and pressures to complete conjugate spinning, so it cannot be produced by conventional chemical fiber production processes.

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