In recent years, with the continuous advancement of industrialization and urbanization, the social economy has developed rapidly, but the subsequent pollution problem has become an important issue that needs to be solved urgently. Sewage treatment has gradually become indispensable for economic development and water resources protection. component.

High-voltage electrostatic spinning technology is a method of preparing nano-micron fiber materials by using the breakdown effect of a high-voltage electrostatic field on a polymer solution. The end of the cone forms a jet and is stretched in an electric field to form a non-woven nanofiber on the receiving device. Electrospinning can prepare fibers with a diameter of tens to hundreds of nanometers. The products have high porosity and large specific surface area, diversified components, uniform diameter distribution, and are very useful in the fields of biomedicine, environmental engineering and textiles. High application value.

Ink is a homogeneous mixture composed of colored bodies (such as pigments, dyes, etc.), binders, filling (filling) materials, additional materials, etc.; it can be printed and dried on the printed body; it is colored and has a certain flow Degree of paste-like glue. In addition to the bright colors, good printing adaptability, and suitable drying speed, the ink must also have certain application indicators in terms of resistance to solvents, acids, alkalis, water, light, and heat.
Inks are mainly used in the printing industry. Pigment is the main solid component in the ink. The grade of the pigment, such as hue, concentration, dispersibility, and physical and chemical properties, directly determines the gradation, color, and clarity of the image on the printed matter.

At present, China's environmental pollution is relatively serious, and long-term strict management is required. Therefore, the urban environmental protection industry is a sunrise industry with extremely strong potential demand. Among them, water pollution prevention and control, solid waste disposal and resource utilization, and air pollution prevention and control account for a high proportion.

The mining industry refers to the extraction of natural minerals such as solids (such as coal and minerals), liquids (such as crude oil) or gases (such as natural gas). Including the coal industry, petroleum industry, salt industry, and other mining industries.
The metallurgical industry refers to the industrial sector that mines, selects, and sinters metal ores, smelts them, and processes them into metal materials. Divided into: ferrous metallurgy industry and non-ferrous metallurgy industry.