Manufacturing method and rewinding method of graphite film, and manufacturing method of graphite composite film and graphite-extracted processed product

摘要

A graphite film exhibiting an extremely low average tear load is liable to cause various problems such as cracking failure, winding slippage failure, wrinkle failure, and dimensional accuracy failure in its manufacturing process and processing process. Even with such a graphite film, 1) the average tear load in the trouser tear test according to JIS K7128 is 0.08 N or less, and 2) the sag in the rollability evaluation of the film according to JIS C2151 is 5 mm to 80 mm. By using the filled graphite film, it is possible to suppress defects.