METHOD FOR CONTINUOUS PRODUCTION OF FUNCTIONAL FILM

摘要

A method for continuous production of a functional film, which comprises a step wherein a porous resin sheet (a porous polyethylene sheet or the like) is continuously conveyed and impregnated with a polymer precursor having a functional group (2-acrylamide-2-methylpropanesulfonic acid or the like), to attach the polymer precursor to the porous resin sheet, a polymerization ste p wherein a first and a second resin films (both are a polyester film or the like) are continuously supplied to both the surfaces of the porous sheet having been impregnated with the above polymer precursor and containing the polymer precursor attached thereto, in such a manner that the resin films ar e contacted with the surfaces and the porous sheet is sandwiched between the t wo resin films, and then the polymer precursor is polymerized (by the irradiati on with an active energy ray, and the like), a film releasing step, and a polym er removing step. The method allows the production of a functional film having a porous resin sheet containing a functional polymer in its pores in a continuous way with good efficiency.