Because the transfer printing has many advantages, the production of products is also very have commercial value. So get rapid development since put into production since the 1960 s, but because only applies to the glass transition temperature is clear of synthetic fiber, blocked, so the development cannot be applied to the natural fiber. How to solve the problem of transfer printing of natural fiber, is a research hotspot at home and abroad.
1. The grafted modified, such as acetylation, benzoyl, etc. Such fibers can accept disperse dye.
2. Surface polymerization. This method is in the fabric surface polymerization macromolecule material, which receive disperse dye, like synthetic fiber such as polyester, styrene, etc.
3. The fiber expanded. Simulation of polyester amorphous area expanded heating phenomenon, accept disperse dye into gas. But since there is no fixation and fiber, cause insufficient fastness. So this method can only share other dye fixation. Fiber expanded the use of polyethylene glycol (200), the relative molecular mass general, it is not only the swelling agent of cotton fiber, disperse dye or solvents.
Comprehensive the above method, have in common is a natural fiber fabric must be pretreatment before transfer printing, thus increasing the production process and the cost of production. More important is to clean the fabric on the remaining must not material washing and drying, which makes it impossible to put an end to waste water emissions and increase the consumption of thermal energy, it will be difficult to get rid of the traditional printing and dyeing production burden.
