Wrapping film can not only replace other packaging materials, but also reduce packaging costs by more than 30%. It also has a good protective effect on easily scratched items, so wrapping film is widely welcomed. However, what many people find difficult to understand is why such a light layer of wrapping film can have such strong puncture resistance?
The penetration resistance of stretch wrap film is closely related to the manufacturing process of stretch wrap film, and can still provide better results compared to LLDPE/LDPE resin. MPE resin is a multifunctional resin that has invention value in multi-layer blown film production lines, cast film production lines, and single-layer blown film machine production. Make contributions to sustainable development. Early LLDPE stretch films were mostly blown films, which developed from single-layer to two-layer and three-layer; Currently, the main production method for LLDPE stretch film is the casting method. Due to the narrow molecular weight distribution and processing range of the stretch film, the processing conditions are difficult to control. Generally, 5% LDPE is added to lower the viscosity limit and increase the flatness of the stretch wrap film. Casting production has the characteristics of thickness, uniformity, transparency, etc., which can meet the requirements of high magnification pre stretching. Due to the inability of single-layer casting to achieve single-sided bonding, its application scope is limited. Therefore, a three-layer co extrusion structure is still more ideal. The stretch film produced has uniform thickness, strong stretching force, and is not easy to crack. In fact, the tensile ductility of stretch film still depends on the metallocene in the material used to make the stretch film. Metallocene is a material that can improve the anti perforation performance of stretch film. It can make the stretch performance of stretch film not only high in ductility but also strong in anti puncture ability.
It seems that stretch wrap film has strong tensile toughness, which is not surprising. However, when wrapping the stretch film again, the amount of metallocene added by the wrapping film manufacturer is different, resulting in different anti perforation properties of the stretch film. Therefore, when purchasing stretch wrap film, it is necessary to choose a regular manufacturer to ensure that the wrapping quality of the stretch film is very good.