Supercritical carbon dioxide dyeing method for bulk fibers

Abstract

The invention relates to a supercritical carbon dioxide dyeing method for bulk fibers. The process flow comprises the following steps: placing dyes and bulk fiber materials in a supercritical carbon dioxide dyeing device, and dyeing under the condition of 70-150 DEG C and 20-30 MPa for 50-120 minutes; then releasing the pressure, and reclaiming carbon dioxide and the dyes under the condition of 4-5 MPa; and returning to the normal state to obtain stock-dyed fibers, wherein the bulk fibers are natural cellulose fibers, natural protein fibers and chemical fibers. The outstanding characteristics of the invention are as follows: the dyes directly carry out the supercritical waterless dyeing on the bulk fibers, and enable the fabric to obtain a special effect; the fabric is enabled to have the characteristics of good dyeing quality, cleaning production without waste products and environmental pollution, low comprehensive cost and obvious economic benefits and environmental benefits, especially waterless dyeing which conforms to the current low-carbon economic policy calling for water saving and energy saving; and the product comes up to GB18401-2003, National General Safety Technical Code for Textile Products.

Description

Supercritical Carbon Dioxide Dyeing Method for Loose Fiber technical field The invention belongs to the field of textile printing and dyeing. It specifically relates to the textile printing and dyeing technology using dyes dissolved in supercritical carbon dioxide, especially relates to the supercritical dyeing technology of loose fibers with plants containing natural pigments. Background technique The problem of resources and environment is a fundamental and strategic issue faced by human society in pursuit of sustainable development in the 21st century. Scientific research in the field of water resources and environment has attracted much attention from the international community and governments. my country is a country seriously short of water. Water pollution has made the problem of resource shortage more prominent. The pollution of the textile dyeing and finishing industry is one of the main sources of water pollution. The traditional loose fiber dyeing process is co...

AI Technical Summary

Problems solved by technology

It has caused great pollution to the environment, wasted huge water resources, and does not comply with the latest environmental policies for water conservation and emission reduction.