What are the reasons that affect the elasticity of Stretch Film? When we use stretch film, elasticity is also an important part. The elasticity of stretch film also has a certain impact on its quality. What is called elasticity, in fact, is that we stretch the stretch film for a certain period of time. The ratio of the restored size to the original size, that is, the resilience. This is the elasticity of the stretch film. We need to have great requirements for elasticity when packaging goods, so elasticity is also one of the indicators for judgment! But at the time of purchase, we found that some stretch films have good elasticity, and some have a slightly worse elasticity. So what are the reasons for their elasticity?
1. Affected by raw materials: the choice of raw materials is also very important. Good raw materials produce good PVC stretch film products. This new film (thin and soft transparent film) has advantages in environmental protection, viscosity, elasticity, etc. (Note: it can overwhelm the other party's advantages). 2. Influenced by climate: climate change is the most important factor affecting the viscosity and elasticity of PVC stretch film. EVA was originally used as a self-adhesive material for stretch films, but it was costly and had a good taste. PIB was later used. VLDPE is a self-adhesive material, and LLDPE is the main substrate, including C4, C6, C8 and metallocene polyethylene ( MPE).
The viscosity will decrease in summer production. Due to the external reasons of high temperature in summer, the viscosity should not be too high during summer production. The packaged product has good viscosity and elasticity; in winter production, the viscosity and elasticity are not very good due to the cold weather. At this time, additives such as condiments should be added in time to control its elasticity and sometimes maintain its tension and elasticity. The above are some of the reasons that affect the elasticity of the stretch film. We can refer to the above information and pay attention to it when we produce, so that the stretch film produced will not have insufficient elasticity!
