This document specifies the requirements, inspection rules, marking, Encasement, transportation and storage of polyolefin cold-drawn casing films, including relevant test methods. The scope of application is the production, inspection and sale of casing films made by blow molding and folding with polyolefin synthetic resins as the main raw materials. The document cites a number of normative documents covering plastic tensile performance, film test conditions, counting sampling inspection procedures, plastic specimen condition adjustment, film thickness, length and width determination, coefficient of friction, puncture resistance, right angle tear performance, and heat seal strength.