METHOD FOR PRODUCING SUBSTRATE SHEET FOR CARRIER TAPE, SUBSTRATE SHEET FOR CARRIER TAPE AND CARRIER TAPE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a substrate sheet for a carrier tape that extremely hardly causes the occurence of fuzz and burr during slitting or during punching in embossing and to provide a substrate sheet for a carrier tape produced by the method and to provide a carrier tape.SOLUTION: The method for producing a substrate sheet for a carrier tape comprises heating and melting a styrene-based resin and extruding the same from a T-die. In the method, a feed block 4 having a plurality of rectangular parallelepiped holes is disposed between an extruder 1 and a T-die 2 and after allowing the styrene-based resin to pass through the rectangular parallelepiped hole, the styrene-based resin is extruded from a T-die to produce a substrate sheet for a carrier tape. The number of rectangular parallelepiped holes provided in the feed block 4 is 5-100, the height thereof is 0.5-4 mm and the ratio of the width to the height is 10 or more. Adjacent rectangular parallelepiped holes are provided so that the width direction thereof is parallel to each other and the width direction of rectangular parallelepiped hole is parallel to the width direction of the T-die 2.