DICING-SHEET SUBSTRATE FILM AND DICING SHEET

摘要

A dicing sheet base film (2) includes a resin layer (A). The resin layer (A) contains: a polyethylene (a1) that has a density of 0.900 g/cm 3 or more; and a styrene-based elastomer (a2). The polyethylene (a1) has a content of 50 mass% or more and 90 mass% or less to a total resin component contained in the resin layer (A), while the styrene-based elastomer (a2) has a content of 10 mass% or more and 50 mass% or less to the total resin component. The dicing sheet base film (2) suppresses the occurrence of dicing debris during the dicing of a cut object without imparting physical energy such as electron rays and ³ rays, and has sufficient expandability in the expanding process.