The dyeing of flame-retardant fabrics should not only focus on the brightness of colors, but also require low carbon and environmental protection. Easy to dye and deep dyed fibers meet this requirement. Easy dyeing, deep dyeing, low temperature dyeing, overcome the difficulties of conventional dyeing, as well as high temperature and high pressure dyeing shortcomings, and the color is more bright. The cost of dyeing is greatly reduced, and the effect of low carbon environmental protection, energy saving and emission reduction has been achieved.
When natural fibers or some chemical fibers are blended, there are many problems, such as difficult to control the dyeing process, increased dyeing cost, increased dye content in wastewater, increased cost of wastewater treatment, etc., which will cause great damage to fiber properties. Therefore, the dyeing modification of polyester fiber has always been the focus of research and development.
Dyeable and deep dyed fibers have successfully solved many problems in fiber dyeing modification. The fibers were copolymerized and grafted by adding a third monomer such as isophthalate sulfonate to the PET macromolecular chain. The anions on these groups reacted easily with cations in cationic dyes and the dyes were immobilized in the fibers. The melting point, glass transition temperature and crystallinity of the fibers were decreased due to the addition of new groups in the macromolecular chains, which destroyed the original structure of the fibers. The increase of amorphous region is beneficial to the penetration of dye molecules into the fibers and the cationic dyeing of the fibers under normal pressure, or the addition of the fourth monomer to the PET macromolecular chain, such as the introduction of flexible polyethylene glycol segment, which makes the molecular structure more loose and the amorphous region larger, which is conducive to the penetration of dye molecules into the fibers. Internal and combined with anionic groups in the fiber can be dyed at room temperature and atmospheric pressure.
Easy-dyeing and deep-dyeing polyester fibers have the characteristics of easy-dyeing, dark color, bright color, high color fastness and wide chromatographic range, which not only overcome the defects of conventional polyester dyeing temperature, but also have the advantages of good air permeability and moisture permeability. After blending, blending and interweaving with other fibers, different colors and multi-colors can be obtained. Dyed and deep dyed fibers have lower dyeing temperature, lower energy consumption and higher efficiency. Easy-dyeing and deep-dyeing fibers are comparable to natural fibers in dyeing brightness and wearing comfort. They can be used to weave high-grade fabrics directly, and can be mixed with other synthetic fibers and natural fibers.
Xinxiang Yulong Textile Co., Ltd. specializes in the R&D and production of flame retardant fabrics, fluorescent fabrics, anti-static fabrics, waterproof and oil-proof functional fabrics for 16 years, with rich experience and reliable quality. The products are exported to Europe and the United States.