Partially separated fiber bundle, production method of partially separated fiber bundle, fiber-reinforced resin molding material using partially separated fiber bundle, and production method of fiber-reinforced resin molding material using partially separated fiber bundle

摘要

A partially separated fiber bundle includes separation-processed sections and not-separation-processed sections that are alternately formed along the lengthwise direction of a fiber bundle that includes a plurality of single fibers, wherein the separation-processed sections include a plurality of divided fiber bundles that have been divided by separation processing. The partially separated fiber bundle is characterized in that the numbers of single fibers of the divided fiber bundles in the separation-processed section are nonuniform.