double-side PE-laminated paper roll : PE chemical imported from LOTTE chemical (Korea) or DOW chemical USA . raw paper roller will be precisely web guided before PE film lamination . PE chemical melted in the device (about 320 degree) ,and melted into a PE film flow onto the paper surface ,meanwhile the cool water cooling down the PE film into a protective PE film . After the paper roll winded up , then do a second-time PE lamination onto the opposite side of paper roll .