Resin Pellet Composition, Production Method Therefor, and Method for Producing Microporous Film

A resin pellet composition, comprising polyolefin-containing second pellets,

• wherein the second pellets have non-porous bodies each comprising a part formed of a resin comprising the polyolefin, and a part formed of a liquid component, and
• the weight of the liquid component existing on the outer surfaces of the second pellets is 10 wt. % or less with respect to a total weight of the second pellets, and is measured by the following method:
• the second pellets are collected in an amount of 20 g;
• the thus collected 20 g of the second pellets is wrapped with a 1-m square sheet having a thickness of 0.6 mm, in which plural 6 μm-thick polyethylene microporous films having a porosity of 38%, a puncture strength of 280 gf, and a pore size of 0.06 μm are stacked, to wipe off the liquid component existing on the outer surfaces of the pellets;
• when the liquid component is transferred to the sheet, the part thereof changes in color to translucent;
• this wiping operation is repeated multiple times while replacing the sheet until a change in the color of the sheet is no longer observable;
• and, thereafter, the weight of the second pellets is measured, and the difference in the weight before and after the wiping operation is determined as the amount of the liquid component existing on the outer surfaces of the second pellets.