What are Coextruded Multilayer Films?

Coextruded multi-layer film is produced by a compound molding technique that simultaneously extrudes thermoplastic resin with multiple extruders and passes that through a single die to build up layers of melted resin both on the inside and outside of a film.
DIC was the first manufacturer in Japan to produce and sell coextruded multi-layer films by the T-die process in the 1970s.