Method for producing polyolefin-based resin expanded beads and polyolefin-based resin expanded beads

Abstract

Provided are a method for producing polyolefin-based resin expanded beads capable of achieving a high expansion ratio and suppressing formation of suppressing formation of by using talc, and polyolefin-based resin expanded beads containing talc and having a high expansion ratio and suppressed formation of excessive cells. The production method includes releasing carbon dioxide-containing polyolefin-based resin particles dispersed in an aqueous medium in a sealed vessel from the inside of the sealed vessel at a pressure lower than the pressure in the sealed vessel and expanding the polyolefin-based resin particles. The polyolefin-based resin particles contain ammonium nitrate and talc.

Dependencies are inferred from the claim text.