| abstract |
A multi-layer construction film comprising at least one layer (A) of ethylene-vinyl alcohol copolymer and having an ethylene content of 20-60 mol%, and a melt index of η Eg/10 min., at least one adhesive resin layer (B) of ethylene polymer and having a melt index of η Ag/10 min. and density of not more than 0.90 g/cm³, and a plastic film (C) wherein the layer (B) is laminated adjacent to the plastic film (C), which satisfies the following formulas. n n 0.5 µm ≦ a ≦ 20 µm (1) n n 0.5 µm ≦ b' ≦ 20 µm (2) n n 1 µm ≦ a + b ≦ 30 µm (3) n n 0.08 ≦ η E / η A ≦ 8 (4) n n wherein a is the thickness of the entire layer (A), b is the thickness of the entire layer (B), and b' is the thickness of one layer of layer (B), and a method for producing same. The multi-layer construction film of the present invention has gas barrier properties, flex resistance, and resistance to boiling, and does not yellow at ultraviolet rays. |