What are the noise-dampening materials used in polypropylene trash can lids?

Polypropylene trash can lids often incorporate various noise-dampening materials to reduce sound during opening and closing. The most common materials include EPDM (Ethylene Propylene Diene Monomer) rubber seals, which provide excellent vibration absorption and durability. TPE (Thermoplastic Elastomer) bumpers are also widely used for their flexibility and impact resistance. Silicone padding offers good temperature stability and quiet operation, while foam inserts provide additional cushioning. Some manufacturers use felt or fabric liners for softer contact surfaces. These materials work by absorbing kinetic energy and minimizing metal-to-plastic contact, resulting in quieter operation. The choice of material depends on factors like cost, durability requirements, and desired noise reduction level. High-end models may combine multiple materials for optimal sound suppression, while budget options typically use single-material solutions. Proper installation and regular maintenance of these damping components are crucial for maintaining their noise-reducing properties over time.