This standard specifies in detail the classification requirements, technical indicators, test methods, and packaging, storage, and transportation specifications for general-purpose films (including plain films and heat-sealable types) made from polypropylene resin through the biaxial orientation process using the flat film method. It covers multiple dimensions such as appearance quality, physical properties, and hygienic performance, and sets clear requirements for key parameters including tensile strength, elongation at break, and tear strength. To accurately evaluate product performance, relevant testing must rely on professional instruments, such as using an electronic tensile testing machine to measure mechanical indicators, employing a transmission imaging system to analyze optical defects, and utilizing a differential pressure gas permeation analyzer to assess barrier properties.