In recent years, with the development of technology, polyurethane wheels have been widely used in various industries as important components for load-bearing transportation. The increasing demand from customers has made the requirements for the application of polyurethane coated wheels more stringent. Now, let’s analyze the reasons for the delamination of polyurethane coated wheels?

1. The influence of mold and iron core temperature: During the polyurethane pouring process, it is required that the temperature of the iron core and mold be similar to that of the polyurethane raw material. When the temperature difference between the two is large, it will cause uneven curing speed of the material, resulting in significant internal stress of the polyurethane material after curing.

2. Mold design requirements: When designing and manufacturing molds, good sealing, easy closure, opening, and demolding are required. When designing molds, the thermal balance of polyurethane should also be considered, which is an important factor that is easily overlooked by manufacturers. If the polyurethane coated wheel is unevenly heated during the high-temperature vulcanization process, incomplete polyurethane vulcanization usually occurs at the joint between the iron core and the polyurethane, resulting in low elastic strength or cracking.

3. Selection of Adhesive: According to adhesive theory, polymer materials with high molecular weight can form molecular forces between the surface of the material and the metal, thereby forming a tight bond between the material and the metal.

4. Polyurethane formula: Polyurethane coated wheel manufacturers should adjust the formula according to the operating conditions, such as load-bearing capacity, speed, and usage environment, in order to be more suitable for the working conditions described by customers.

5. Surface treatment of iron core: The treatment of iron core and cast iron roller core is also one of the key factors for roller core detachment. To achieve a good bond between polyurethane elastomer and iron core, it is usually necessary to clean the iron core, such as using acid pickling to remove rust, dirt, etc., to ensure that its surface is clean and free of dirt. Mechanical sandblasting treatment is usually one of the methods for bonding strength.

The above is an explanation of the reasons for the delamination of polyurethane application. Choosing a good product can improve the wear resistance and prolong the use of polyurethane coated wheels. Yalide can provide high-quality polyurethane wheels, polyurethane coated wheels, and polyurethane load-bearing wheels. Please feel free to inquire.