In our life, we often see the packaging effect of stretching film. The packaging of stretch film is very tight and strict, which is enough to show the good quality of the product. So do you know why stretch film is so effective in packaging? In fact, before we use stretch film for packaging, we must go through a stretching operation. Many users do not understand why this is necessary, they think stretch film itself is very good stretching performance, do not need to do anything more, it is a stretch. This thinking is wrong.
To sum up, stretching the stretch film before the wrapper can not only improve the tensile properties, but also change its puncture resistance and viscosity.