dyes, near -infrared absorption dyes, fluorescent dyes and other functional dyes and applications

The hair color system of synthetic dyes/pigments is a common electronic system. These systems not only produce colors, but also have many other functions related to light, heat, electrical, chemistry, biochemical and other functions. These dyes with special functions have special functions. /Pigment is called functional dye/pigment.

Development of functional dye:

① Screening of the original dye

② Change the hair color system of traditional dyes

One discolored dye and its application

1. Hot color change dye/pigment

① Inorganic thermal deformation dye/pigment

Trimming mechanism:

Phase variables, regulatory geometric shape changes, balance changes between different molecular structures, and changes in the number of solvents in solvent -based ions;

Application situation:

Trimming must be used in solutions, high temperatures, or irreversible, so it is not applied in textile processing.

② Organic thermal discoloration dye/pigment

Trimming mechanism:

The structure of the lattice structure (such as LCD), the occurrence of three -dimensional heterogeneous, molecular discharge, etc.;

Application situation:

High temperature sensitivity and strong color are the main dyes applications in the processing of discolored textiles.

It is mainly used for textile printing. It is a gall -type liquid crystal. It will show a rainbow -like color due to white light: the color can change from red to purple with the temperature and pressure, and the change is reversible.

Trimming mechanism:

The gallbladder liquid crystal has a spiral structure. This structure will change with the temperature, which changes the reflection and transmission of light, and produces different colors. At the same time, the optical alien of the LCD itself will also produce color changes. Therefore, it is very sensitive Thermal color transformation performance. Because the color of LCD has nothing to do with the chemical structure of the molecular, the light resistance stability is good.

③ Application of LCD dyes

LCD has no affinity for fiber. Generally, it is applied to the surface of textiles with the help of coating or pigment printing. In order to improve stability and easy application, LCD is often made into microcapsule applications. In order to increase color intensity, it is often mixed with dye / pigment, but the dye / pigment must be selected.

Molecular heavy discharge discoloration substance

Organic thermal discoloration/pigment dyeing three -dimensional heterogeneous color deformation and molecular heavy discharge discoloration. Among them, the discoloration of the three -dimensional heterogeneous chromatography/pigment requires a melting point (≥150 ° C), which is difficult to apply to textiles. Commonly used is the dye/pigment of molecular degeneration, such as crystalline purple.