Manufacturing method of polyethylene colored fibers with ultrahigh molecular weight

Abstract

The invention discloses a manufacturing method of polyethylene colored fibers with ultrahigh molecular weight. According to the manufacturing method, colored fibers with the filament number of 0.33dtex-2.0dtex, the bundle fiber fineness of 22dtex-1776dtex, the fiber strength of 10cN / dT-40cN / dT, the modulus of 1000cN / dT-1600cN / dT and the elongation at break of 2%-4% are prepared through steps of preparing a colored spinning stock liquid, preparing colored proto-filaments and preparing the colored fibers. The polyethylene colored fibers have fine monofilament fineness and have thin and soft textures; the prepared colored fibers have good color uniformity and rich color varieties; the depth of color is adjustable, and the color fastness is high; the wear-resisting color fastness reaches the grade 4 or more, and the sunlight-resisting color fastness reaches the grade 4 or more; the soaping-resisting color fastness reaches the grade 4 or more, and the weather-resisting color fastness reaches the grade 4 or more; in a production process, a process is simple, and continuous and stable production is realized; one hundred thousand meters of a product can have no connectors, and a solvent is easy to volatilize; and after purification and separation are carried out by a rectification system, the solvent does not contain any pigment, and each bath of yarns have no color difference. The recycling rate is more than or equal to 99.5%, waste emission is reduced, and low carbon and environment friendliness are realized.

Description

technical field [0001] The invention relates to the technical field of synthetic fibers, in particular to a method for manufacturing ultra-high molecular weight polyethylene colored fibers. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) is a flexible chain polymer composed of methylene. The molecular structure is relatively simple. After high-strength drafting, the polyethylene macromolecular chains are highly oriented and crystallized, and the fibers produced are bright white and single in color. . In addition, the UHMWPE fiber molecular chain contains neither polar groups nor chemically active groups. It has stable performance, regular molecular chain structure, and high crystallinity. UHMWPE molecules are difficult to interact with dyes, and dyes are not easy to diffuse into the fiber. Conventional The dyeing method has poor dyeing effect on UHMWPE fiber, which hinders the application and development of UHMWPE fiber to a certain extent. ...

AI Technical Summary

Problems solved by technology

Compared with fiber dyeing, pre-spinning coloring has better mechanical properties and coloring uniformity of fibers, but the pre-spinning coloring process in the current prior art either uses color masterbatch, or prefabricated pigment slurry, or premixed with inorganic pigments Swelling in the screw extruder, and the spinning process is wet spinning, the process is cumbersome and complicated, the pigment dispersion is poor, the color is light, the color fastness and uniformity are poor

Moreover, the colored fibers produced are thick and hard, and the single-filament fineness cannot be below 2D. They are mostly suitable for low-end fields such as ordinary ropes and nets, and are powerless for fields such as functional clothing that require both comfort and performance.

At the same time, due to the limitations of the above prior art processes, the fiber colors produced are few, and the amount of waste discharged during the color conversion is large, and the pigments will dissolve in white oil under high temperature swelling conditions, and the solvent recovery quality is low, and even cannot be recovered. Recycling does not conform to the current general trend of energy saving, emission reduction, low carbon and environmental protection

[0005] In addition, there are some special dyeing processes in the prior art, such as supercritical CO 2 Dyeing, etc., but due to the harsh conditions required, complex process, high cost, and limited applicable pigments, it cannot be industrialized

Images