... melt adhesive under conditions of avoiding chemical reaction, is heated, then is melt into the fluid in order to coat; ... two or three material which is bonded with PUR hot melt adhesive is cooled down, glue line which is agglomerated takes effect of bonding ... and PU film in this way is waterproof and breathable, is dressed softly and comfortablely. It is waterproof, breathable, windproof, warm, ...