Method for producing polypropylene resin expanded particles, polypropylene resin expanded particles and in-mold expanded molded body

摘要

Provided is a method for producing expanded polypropylene resin particles, which is a raw material for an in-mold expanded molded article that can utilize the strength inherent in a base resin even at a high expansion ratio. The method for producing expanded polypropylene resin particles according to the present invention is a one-stage expanded particle in which wrinkle shrinkage is suppressed to 5% or less using polypropylene resin particles made of a polypropylene resin composition mixed with a specific polyethylene resin. It is characterized by manufacturing.