Russia has developed a new method of coloring polypropylene products
Polypropylene is a light, durable, waterproof and chemically stable material. It is often used to make plastic products, such as disposable containers and storage tanks. Polypropylene containers can store toxic chemicals and do not absorb water at all. Polypropylene textiles have a wicking effect and can create a comfortable microenvironment for the skin.
Although polypropylene has many advantages, the original solution coloring method has been used to color polypropylene in the production process, which leads to the loss of the original characteristics of polypropylene, and it is impossible to paint patterns or new products on the product. s color.
St. Petersburg State University of Industrial Technology and Design Experts and students in the teaching and research section accidentally discovered during the experiment that the ammonium chloride salt used as a reagent when penetrating into the polymer chain can send the dye into the space between the polypropylene atoms while preserving the polymer chain. To color the product, simply heat it to 100 degrees Celsius in a container filled with water and dye.
Anna Mikhailovskaya, a professor at the Kharkharov Chemical Technology Department of St. Petersburg State University of Industrial Technology and Design, said that this is a very simple method and does not require the purchase of special equipment. In addition, this method can not only color polypropylene, but also color polyester, polyamide, and other polymers used in synthetic fabrics.
Anna Mikhailov Sskaya also said that researchers are also trying to process cellulosic materials, such as wood, cotton, flax, viscose fiber, and so on. The results show that the new chemicals can not only color, but also make these materials antibacterial, which is what cellulosic materials urgently need. At the same time, the color of the colored product can resist moisture and light.