PU sheet is a type of polyurethane foam which is used in many industries such as sports equipment, automotive insulation, and upholstery. PU sheet has a high resistance to shock and vibration because it's so light weight for its rigidity. It also absorbs sound really well because it's denser than most foams. ...

Within the last 200 years, scientists have created many new fabric and fiber innovations rather than traditional weavers. People have valued leather for its flexibility, strength, and soft feel for thousands of years. But its high price has slowed the march of mass consumption. ...