What do you know about fiber materials that change color?

(1) Photochromic materials

Photochromic material is a kind of functional dye that can change color under the irradiation of ultraviolet ray or visible light, and can be reversed to the original color after the light disappears. Photosensitive color-changing materials mainly include silver chloride, silver bromide, stilbenes, spirocycles, hypobarbamate dienes, captured arginic anhydride, triphenylmethane derivatives, salicylic acid aniline compounds, etc. At present, photosensitive color-changing materials have been widely used in the field of color-changing materials, and have been widely used in the field of color-changing materials. At present, photosensitive color-changing materials have been developed to have 4 basic colors: purple, yellow, blue, red. The initial structure of these four kinds of light-change materials are closed-loop type, that is, printed on the fabric has no color, when in the ultraviolet radiation before becoming purple, yellow, blue, red.

(2) Thermal color-changing materials

The reason why thermochromic materials can change color is due to the color change body can cause changes in the internal structure, resulting in color change, when the temperature is reduced, the color and recovery. Relative to photosensitive dyestuffs, the research on thermal dyestuffs inside and outside of guo is much more, especially in the application of textile printing, has achieved certain results, there are a series of thermal printing products.

A series of heat-sensitive printing products have been released. For example, the RT series produced by our company belongs to heat-sensitive color changing products. Fabrics in the process of taking, with the seasons, different regions, indoor and outdoor temperatures, and present a variety of colors, currently able to produce color-changing coatings and master the processing technology is mainly British guo, Japan, etc., as well as my guo's Taiwan region.

(3) Moisture-sensitive color-changing materials

Moisture-sensitive color-changing materials change color mainly because of the humidity in the air leads to changes in the structure of the dye itself, so that the visible part of the absorption spectrum of daylight changes, while the environmental humidity on the color of the color-changing body has a certain catalytic effect. The main component of moisture-sensitive color-changing dye color-changing printing paste is color-changing cobalt complex salt, and the color-changing body is firmly adhered to the fabric by adhesive when applied. In order to make the color change sensitive, it is necessary to add a certain sensitizer to help the color change body to complete the process, while also adding a certain color enhancer to improve the vividness of the color change fabric color.

If the printing color paste in, color change coating clever combination, used for towels, bath towels, handkerchiefs swimwear, beachwear, etc., you can get a chic print pattern. White when dry, after wetting is transparent and the flower pattern disappears.

Production technology of color-changing materials

In the field of textiles, the manufacturing technology of color-changing materials mainly includes color-changing fibers and color-changing dyes:

The color-changing dyes applied to textiles are mainly thermochromic dyes, photochromic dyes and moisture-sensitive color-changing dyes. However, because the rubbing fastness and washing fastness of these dyestuffs are not satisfactory enough, microencapsulation technology was introduced into the preparation of color-changing dyestuffs in the 90s of the last century, which made the application of color-changing dyestuffs in textiles gain a qualitative leap. Compared with printing and dyeing technology, color-changing fiber technology has obvious advantages: the fabrics made have good handfeel, good washing resistance, and the color-changing effect is longer lasting.