Blown films and a method for producing the same

摘要

An objective of the invention is to provide a blown film which is excellent in terms of the optical characteristics, the tear strength and the rigidity as well as a method for producing the same, and the present invention provides a blown film whose surface morphology is a spherulite structure in which spherulites having diameters of about 3 mum or more exist and whose surface mean roughness Ra is about 30 nm or less as well as a method for producing the same.