Apa bahan tutup botol

Caps are made from a variety of materials, including metals (eg, tin-plated steel sheets, tin-free steel plates, and aluminum and aluminum alloy plates), thermoplastics (eg, PP, PE, PS), thermosets (eg, fillered phenolic resins, filled urea-formaldehyde resins, and urea-reinforced urea-formaldehyde resins), glass, as well as Berbagai bahan pelapis (misalnya, liner sol, liner plastik yang dicetak, dll.) Dan bahan penyegelan interlock. Pilihan bahan -bahan ini memiliki dampak langsung pada kinerja dan biaya penutupan.