ã€Chinese Packaging Network News】 Wrapping film is a packaging material used to bundle goods, it is unique in that it can use mechanical stretching device or manual deformation stress. But do you know how the viscosity of the film's sticky layer is controlled?
There are many materials used to make the wrapping film, which mainly depends on the application field of the product. Therefore, if you want to control the viscosity of the wrapping film, you can work hard on the material. Stretch film is not all C4-LLDPE can match, C6, C8 materials are often used because of its easy processing.
In addition, the temperature will also affect the stickiness of the film. Generally, we will place the product in an environment of fifteen to twenty-five degrees. If the temperature exceeds thirty degrees, the viscosity will increase; if it is less than fifteen degrees, , viscosity will worsen. Since there is a polyethylene component in the wrapping film, we can adjust the amount of polyethylene to achieve the desired viscosity.
Since the molecular weight distribution of the stretch film is narrow and the processing range is relatively narrow, usually adding only 5 percent of polyethylene can reduce the melt viscosity, and the flatness of the stretch film can also be increased. The flatness.