Polyester fiber solvent carrier stock solution dyeing technology before spinning

Abstract

The invention discloses a polyester fiber solvent carrier stock solution dyeing technology before spinning, and belongs to the field of chemical fiber production. The polyester fiber solvent carrier stock solution dyeing technology before spinning comprises the following steps: (1) dye and a solvent carrier are mixed into uniform dye stock solution used for solution dyeing before spinning; (2) the dye stock solution is poured into a polyester melt in a pipeline through a metering injection device, and is mixed; (3) the polyester melt and the dye stock solution are evenly mixed through a mixing assembly; and (4) after being mixed, the polyester melt and the dye stock solution enter a melt metering device, and after being metered, the polyester melt and the dye stock solution are sent a spinning assembly to spin. Compared with a maternal dyeing method, the polyester fiber solvent carrier stock solution dyeing technology has the advantages of being pollution-free, environment-friendly and energy-saving because the production process is short, and the mixing temperature (<=150 DEG C) of the dye solution is low.

Description

technical field [0001] The invention relates to a solvent carrier dope coloring process for polyester fibers before spinning, which belongs to the field of chemical fiber production. Background technique [0002] At present, the coloring technology of polyester fiber mainly adopts the matrix coloring method, that is, a certain proportion of colored chips is mixed into the natural color chips. In short, 30% pigment (dye) powder and 70% polyester powder are mixed and granulated. , to produce a "color masterbatch", which is melted together with the natural color chips during spinning and input to the spinning machine to directly spin colored fibers. This method is the main process route used in the production of colored silk at present. Its advantages are: less staining on equipment, easy to use, and easy to change colors. However, it is necessary to manufacture "color masterbatch" made of pigment powder and polyester powder as raw materials, and add the ratio of colo...

AI Technical Summary

Problems solved by technology

Its disadvantages are: in the melt direct spinning production line, it is difficult to realize small batch and multi-variety production; when changing varieties, more raw materials will be consumed to clean up the staining equipment; High-temperature processing (masterbatch manufacturing and pre-spinning melting), so there are certain restrictions on the requirements for dyes and the brightness of the product; in addition, a certain amount of consumption and environmental impact will also occur during the production of masterbatches. Pollution