What Are The Materials Of The Bottle Caps

Caps are made from a variety of materials, including metals (e.g., tin-plated steel sheets, tin-free steel plates, and aluminum and aluminum alloy plates), thermoplastics (e.g., PP, PE, PS), thermosets (e.g., fillered phenolic resins, filled urea-formaldehyde resins, and urea-reinforced urea-formaldehyde resins), glass, as well as various lining materials (e.g., sol liners, molded plastic liners, etc.) and interlock sealing materials. The choice of these materials has a direct impact on the performance and cost of the closure.