Method of preparing packaging material for photographic photosensitive material and masterbatch therefor

摘要

A resin composition for masterbatch, which comprises 5 to 90 wt. % of modified polyolefin resin and 5 to 70 wt. % of carbon black having a mean particle size of 15 to 120 m mu and an oil absorption value of more than 50 ml/100 g of which volatile components are less than 3.5 wt. %. The fluidity of the resin composition for masterbatch of the invention is excellent even in a high concentration of carbon black, and is uniformly dispersed in a base resin in a short time.