Tennis Ball comprises an elastomeric Foam Polyurethane with a density of 250 to 800 kg / m3The Foam and is covered with a textile material has been prepared by reacting an Aromatic polyisocyanate and a polyol to prepare and process;

摘要

Tennis Ball comprises an elastomeric Foam Polyurethane with a density of 250 to 800 kg / m3The Foam and is covered with a textile material has been prepared by reacting an Aromatic polyisocyanate and a polyol process; and to prepare for the Ball.