PLASTIC SCREW CAP WITH IMPROVED UNSCREWING

摘要

The invention concerns a plastic screw cap with improved unscrewing for a bottle containing in particular beverages such as soda water, mineral or natural water, aerated or not. The invention also concerns the method for making screw caps with improved unscrewing for bottles containing beverages such as soda water, mineral or natural water, aerated or not. The screw caps are produced by using a mould whereof the contact surface of the male part has been modified so as to provide it with roughness such that the tightening torque is reduced.