crosslaminates of thermoplastic films have at least one of the films formed as a fluted structure , and two films are laminated to one another in such a manner that pockets are formed which contain gas . the pockets allow passage of gas between at least two adjacent flutes , whereby the product has an improved handle , and bags formed of the laminate have good stacking properties when filled with coarse particulates . the flute pitch is generally no more than 3 mm , while the pocket length is less than 50 mm . the bonding method involves spot bonding between the films , achieved by adhering the films together between crown portions of bosses on one film with molten material on the other film under a low pressure process , for instance achieved by provision of air pressure through adaptation of production apparatus , for instance die portions .