Preparation method of high-concentration high-color-fastness masterbatch for fibers

Abstract

The invention discloses a preparation method of high-concentration high-color-fastness masterbatch for fibers. The method comprises the following steps: 1) weighing the following raw materials by weight: 8-30 parts of PET, 0-50 parts of PBT, 0-50 parts of pigment, 0.3-1.5 parts of a dispersing agent and 0.5-1.2 parts of a rheology modifier, with the intrinsic viscosity of PET being 0.66-0.82 dL/gand the intrinsic viscosity of the PBT being 0.82-1.0 dL/g; (2) after the raw materials are weighed according to the proportion, adding the weighed raw materials into a mixer, stirring the materials for 10 minutes to fully mix the materials, then extruding the uniformly mixed materials in a double-screw extruder, and carrying out water-cooling, strip drawing and pelletizing to obtain the masterbatch. The double-screw extruder is provided with a vacuumizing device. The masterbatch prepared by the invention is suitable for high-color-fastness PET fibers, can solve the problems of poor thermal migration resistance, poor washing fastness and spinnability of the existing colored fibers before spinning, improves the phenomena of yarn drifting and end breaking in the fiber preparation process, and is beneficial to prolonging the service cycle of a spinning assembly.

Description

technical field [0001] The invention relates to a method for preparing a high-concentration and high-color-fastness master batch for fibers. Background technique [0002] Most of the traditional methods obtain colored functional fibers or textiles through printing and dyeing or functional finishing, but the above methods have problems such as high energy consumption, large amount of waste water, and unsustainable functionality. As the technology of the original dyeing process is restricted by more and more stringent environmental protection requirements, at present, it is also useful to add different colors to the fibers by adding masterbatches. The way of using masterbatch can effectively solve these problems, and the process is simple and the environmental pollution is less. However, there are still many deficiencies in the existing technology of adding masterbatches to polyester carriers for spinning. Since the masterbatches have been processed at high temperature once, ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of preparation method of high concentration and high color fastness master batch for fiber, the prepared master batch is suitable for high color fastness PET fiber, can solve the poor thermal migration resistance of existing pre-spinning colored fiber, Poor washing fastness and spinnability problems, improve the phenomenon of floating and broken ends in the fiber preparation process, and help to prolong the service life of spinning components