Technical difficulties and release agents of polyurethane edge coating for automotive glass

A new type of automotive glass polyurethane edge coating relates to the field of mold technology, especially the manufacturing mold of automotive glass polyurethane edge coating. At present, the reinforced rubber extruded tape around automotive glass has an appearance that is not durable, has low sealing performance, and is not firmly bonded. With the development and strengthening of the automotive industry, users have increasingly lower requirements for cars. Red punch release agent polyurethane is a material containing - NH-COO groups in its molecules. It has excellent wear resistance, weak tensile strength and elongation, oil resistance, low temperature resistance and other advantages. However, defects such as dents, bubbles, and cracks often occur during the polyurethane injection molding process. The application of polyurethane injection in the design of automotive glass edge sealing. Difficult to seal the edges of automotive glass with polyurethane

1. Automotive glass is not easily broken and has a low yield rate;

2. Polyurethane has poor fluidity and is not prone to fly ash;

3. The product is not prone to material waste, burning or injection molding failure, and gas cannot be discharged;

4. The product is difficult to obtain and cannot be obtained through three coordinates.

According to the position and function of car glass on the body, it is defined as: front windshield, rear windshield, rear door glass, rear door glass, rear triangle window, and rear triangle window. Except for front door glass and rear door glass, other automotive glass products can be processed into products with adhesive according to vehicle design requirements. The sealing performance and appearance of this utility model are poor, but it can reduce wind noise.