Method for preparing black yarn through direct mixing of PET melt and special equipment of method

Abstract

Provided are a method for preparing black yarn through direct mixing of a PET melt and special equipment of the method. The method comprises the steps that a melt is introduced from a main melt pipeline, and then a delustering agent and a dispersing agent are mixed according to a proportion; the mixture enters a double screw extruder under a negative pressure condition to be subjected to low-speed primary mixing, co-blending is conducted through an ultrasonic dynamic mixing machine, and direct spinning is conducted after mixing is conducted through a dynamic mixer. The equipment comprises an extruder assembly, an auxiliary material bin assembly, a dispersing agent bin assembly, an ultrasonic dynamic mixing assembly, a dynamic mixing assembly, a spinning metering assembly and a control box; the main melt pipeline is connected to a material outlet of a material outlet assembly, a material outlet of the ultrasonic dynamic mixing assembly is connected with the main melt pipeline through a tee joint and then communicated with the dynamic mixer, a material outlet of the dynamic mixer is communicated with a material inlet of a spinning metering pump, and a material outlet of the spinning metering pump serves as a spinning assembly connector to be connected with spinning equipment. The method for preparing the black yarn through direct mixing of the PET melt and the special equipment of the method have the advantages that the viscosity is reduced, the quality is stable, the spinnability is good, and the cost is low.

Description

technical field [0001] The invention relates to a method for directly mixing PET melts to prepare black silk and special equipment thereof. Background technique [0002] In the past, functional fibers were produced through the chip spinning process, using white chips and functional masterbatches for melt spinning. In recent years, with the maturity of melt direct spinning pipeline addition technology, the dual advantages of quality and cost of melt direct spinning are gradually replacing chip spinning as the main production route of functional fibers. However, the twin-screw extrusion process involved in the traditional process requires high-speed rotation and mixing, which makes the viscosity of the melted raw materials drop significantly under the shearing effect of high-speed rotation, so it is necessary to choose high-viscosity slice compensation in the selection of raw materials. The loss of viscosity reduction during the tablet making process leads to high spinning co...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems that the current process is easy to cause melt viscosity reduction, complicated process, waste of resources and high cost, the present invention proposes a process such as insignificant viscosity reduction, reduction of slicing and granulation, drying, solid-phase polycondensation, and powder grinding, which greatly Method and special equipment for directly mixing PET melt to produce black silk with reduced electricity, packaging and transportation costs

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