| 摘要 |
<p>PURPOSE:To enhance adhesion under a dry and lowly humid state by a method wherein an ethylene-methacrylic acid copolymer is extruded so as to form a film on the bond area of the base material of a laminated film in order to blast O3-containing air under specified conditions against the copolymer. CONSTITUTION:The bond area side of a base material 4 consisting of a laminated film, in the construction of which aluminum foil 1 is included, is made of a biaxially oriented polyethylene terephthalate film or biaxially oriented nylon film 3. Further, in-line corona treatment is applied onto the above-mentioned bond area. On the other hand, after the air containing 1g/Nm<3> or more of O3 is blasted under the condition of 0.5/Nm<3>/hr or more against the bond area of an ethylene-methacrylic acid copolymer resin 5, which is extruded from the T-die of an extrusion molder so as to form film, both the film 3 and the resin 5 are bonded together under pressure. Concretely, the ethylene-methacrylic acid copolymer resin 5 is extruded under melted state and, after ozone- containing air is blasted from an ozone treating bar 30 against one side of thin melted film 5', laminated under pressure to the base material 4 by being pinched between a cooling roll 10 and a nip roll 40.</p> |
