Study on Preparation and Printing Evaluation of Composite Aromatic Expansion Microsphere Ink

Functional microcapsule refers to a small container in which solid, liquid or gas are wrapped by natural or synthetic polymer materials to form a core-shell structure. Meanwhile, the corresponding functional ink can be obtained by combining functional microcapsule with ink. In this study, thermal expansion and aromatic slow-release functional microcapsules were formulated at a certain ratio with colorants and binders to obtain a composite microsphere ink with aromatic expansion effects. Based on this, the functional microcapsule ink is transferred to five kinds of different flexible printing substrates such as cotton, non-woven fabric, kraft paper, offset paper and coated paper by screen printing, and the impact of binder on ink printability is mainly investigated. Moreover, the surface morphology, foaming height, adhesion of printed products and thermal stability of printing ink were characterized by laser confocal microscope, thickness gauge and thermogravimetric analyzer. At the same time, the printing effects of functional microcapsule ink on different substrates were evaluated and the ink formula was adjusted. Finally, a functional printed product with long-lasting fragrance and three-dimensional effect is obtained.