How to accurately grasp the viscosity of PE wrapping film

There are many materials for making the wrapping film, which mainly depend on the application field of the product, so if you want to control the viscosity of the wrapping film, you can work hard on the material. Not all C4-LLDPEs can be used with stretch films, and C6 and C8 materials are often used because of their easy processing.

In addition, the temperature will also affect the viscosity of the wrapping film. Generally, we will put the product in an environment of 15 to 25 degrees. If the temperature exceeds 30 degrees, the viscosity will increase; if it is lower than 15 degrees, the viscosity will increase. , the viscosity will deteriorate again. Since there will be polyethylene in the stretch film, we can adjust the amount of polyethylene in the adhesive layer to achieve the desired viscosity.

Since the molecular weight distribution of the stretch film is relatively narrow and the processing range is relatively narrow, usually only 5% polyethylene can be added to reduce the melt viscosity, so that the flatness of the stretch film will also be improved. of flatness.