PUR (Polyurethane Reactive, Chinese full name is moisture curing reactive polyurethane hot melt Adhesive. The main component is isocyanate-terminated polyurethane prepolymer. The adhesion and toughness of PUR (elasticity can be adjusted, and it has excellent adhesion strength, temperature resistance, chemical resistance and aging resistance) In recent years, it has become the adhesive industry It is one of the important varieties of it. Now it is widely used in packaging, wood processing, automobile, textile, electromechanical, aerospace and other national economic fields.
After the two adherends are laminated and cooled, the adhesive layer condenses to play a bonding role; then, with the help of the moisture existing in the air and the moisture attached to the surface of the adherend, it reacts with and extends the chain to form a polymer with high cohesion. material, so that the adhesion, heat resistance, low temperature resistance, etc. are significantly improved. Due to its extremely high reactivity, it shows excellent adhesion to a variety of materials, and is widely used in the top cover of washing machines, the top cover of disinfection cabinets, book binding, car lights, furniture edge sealing, shoemaking etc. bonding.
Pur Glue,Pur Hot Melt Glue,Pur Flat Adhesive,Pur Edge Sealant GUANGZHOU INTERNET WOOD GLUE MANUFACTURER CO. LTD. , https://www.iwghotmelt.com
This standard systematically specifies the technical specifications necessary for the evaluation of the EMC performance of construction machinery in the form of internal power supply units such as mobile cranes, concrete pump trucks, and sanitation vehicles, as well as test methods and guidelines that meet the standards.
It is reported that China's construction machinery industry is currently still largely blank in its electromagnetic compatibility (EMC) research. The main reason is that China lacks a complete system of test technology and testing environment. On the other hand, China does not have its own electromagnetic compatibility technology standard. . This allows Chinese products to enter the European and American markets only when they refer to the standards of others. Without their own right to speak, they will not be able to surpass the European and American technologies. In order to break this situation, Zoomlion actively declared and undertook the completion of the construction of the country’s first corporate key laboratory, and declared and assumed the first national key basic research and development plan (973) project completed by the enterprise. ———Research on the key technologies for electromagnetic compatibility of electrical systems in construction machinery. Now it has also compiled and released the country’s first safety standard for electromagnetic compatibility of construction machinery. This means that Zoomlion is leading the development of the Chinese industry, and the world’s advanced technologies and standards. A solid step has been taken in terms of convergence.
Reactive hot melt adhesive is under the condition of inhibiting chemical reaction, such as hot melt into fluid, so as to facilitate coating.
Recently, China’s first safety standard for electromagnetic compatibility of construction machinery undertaken by Zoomlion GB/T28554-2012 “Electromagnetic Compatibility Requirements for Construction Machinery with Power Supply Units in Industrial Machinery Electrical Equipment†was formally issued by the National Standardization Management Committee. This marks that All along, the EMC test of engineering machinery products has been broken by relying on European and American standards.