High temperature. There are no bubbles in the high-temperature bonding of Teflon and EVA. The use of high-temperature bonding will enhance the adhesion between the products and compress the air inside the space, so that no bubbles can form inside during the bonding process. Teflon is the trademark used by Chemours for a range of fluoropolymer products. It was invented and manufactured in Jackson Laboratory by Dr. Roy J. Plunkett.