Transfer printing of natural fiber fabrics focuses on the development of new dyes

The transfer printing adopts the medium-free gas phase reaction, which is the first new process to get rid of the aqueous phase reaction in printing and dyeing production, which also realizes the zero discharge of wastewater. In the past, it was pointed out that the carrier for transfer printing - paper is to transfer paper factory pollution. However, practice has proved that the paper after transfer printing basically has no damage, and can be completely reused by paper mills. Moreover, the printing plant can also receive 30% of economic compensation, becoming a win-win situation for printing and dyeing plants and paper mills. Now the biggest problem in the transfer printing production process is the limited synthetic glass with relatively clear glass transition temperature. Since the 1980s, the production volume has been limited to around 5% of the total printing volume in the world. Therefore, in order to meet consumer needs, it must be Develop transfer printing of natural fabrics. Due to the emphasis at home and abroad, this has become a research hotspot and many methods and patents have been developed. However, the common problem with these methods is the increase in the number of processes, and more importantly, it is impossible to achieve zero discharge of wastewater, which is very different from the current transfer printing production. The current research focus should be on the development of a series of new dyes.

These dyes must have the following characteristics:

1) Sublimation at around 200°C.

2) Can bind with cellulose fibers.

Dyes that meet the above requirements should be used instead of the currently used disperse dyes. Only natural fiber fabrics can be applied, not only can meet consumer requirements, but also can fundamentally ease the current contradiction between printing and dyeing production and environmental protection.