PP bags, made from polypropylene through color printing and offset printing, are brightly colored and commonly used in woven bag production. These bags are thermoplastic, non-toxic, odorless, and have a smooth, transparent surface. They burn easily, producing a molten, dripping flame. They produce minimal smoke and continue to burn even after removal from the flame. They are widely used in packaging for cosmetics, food, toys, clothing, stationery, electronics, hardware, and other industries. They are favored for their high transparency, quality, and toughness. However, their hardness and brittleness mean they are more suitable for packaging than for load-bearing.
OPP bags are oriented-oriented polypropylene film, characterized by high transparency and relative brittleness. They are made from a single OPP sheet folded in half, sealed on the sides, and secured with a self-adhesive seal at the opening. To use, simply remove the protective film from the seal, fold the opening in half, and secure it securely, providing both convenience and aesthetics. OPP bags are widely used in industries such as clothing, food, printing, stationery, cosmetics, and paper. They can be printed with various designs and even perforated with butterfly and airplane holes to suit customer needs. The main difference between the two is that OPP film has higher tensile strength, stiffness, transparency, glossiness, and printability than standard PP film. Therefore, OPP film is generally more expensive, and prices vary depending on the specification. OPP film's sealing properties are more than twice those of traditional film, which enhances product moisture retention and preservation, extending shelf life.
