Customers who have used stretch film must know that there is a layer of viscosity on the inside of stretch film, which is not high but is still used to package products, and it is because of this layer of viscosity that stretch film can firmly package goods. So as the production of stretch film for many years stretch film manufacturers, I will explain together with you the viscosity control of stretch film sticky layer, the details are as follows.

There are many manufacturing materials for stretch film, mainly depending on the application area of the product, so to control the viscosity of stretch film you can work on the material. Stretch films are not paired with all C4-LLDPE, C6 and C8 materials are often used because of their ease of processing.

 

The temperature also affects the viscosity of stretch film. We usually 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 become worse. Because the stretch film has polyethylene in it, we can adjust the amount of polyethylene in the sticky layer to achieve the desired viscosity.

 

Because the molecular weight distribution of stretch film is narrow, the processing scale is also narrow, so usually as long as the addition of five percent of polyethylene, you can reach the role of reducing the melt viscosity, so that the flatness of stretch film will also be improved to increase the flatness of the film.