LAMINATED THERMOPLASTIC RESIN FILM ROLL AND PROCESS FOR PRODUCTION THEREOF

摘要

[PROBLEMS] To provide a laminated thermoplastic resin film roll having fewer optical defects and a process for the production of the roll. [MEANS FOR SOLVING PROBLEMS] A laminated thermoplastic resin film roll which is a roll-shaped product of a laminated film obtained by forming a coating layer comprising a resin component containing a copolyester resin or both a copolyester resin and a polyurethane resin and particles on at least one side of a thermoplastic resin film substrate, characterized in that the number of contained foreign particles which are 0.3 mm or above in length and are made mainly of both the above resin component and the above particles is 30/100m<SUP>2</SUP> or below; and a process for the production of the roll, which comprises filtering the copolyester resin solution to be used in preparing a coating fluid for the formation of a coating layer with a filter having a precision (particle size) of 0.5µm to 10µm under the conditions of solution temperature of 15°C or above but below 35°C, heating the filtrate to a temperature of 50°C or above but below 70°C, and then filtering the resulting filtrate with a filter having a precision (particle size) of 0.5µm to 10µm under the conditions of 15°C or above but below 35°C.