Stretch Film has evolved since it first hit the packaging industry in the early 1970’s. It is a relatively new product in the industry that has undergone three major transformations during this time period.
The first two types of stretch film were introduced around 1972. These types were LDPE (low density polyethylene) and PVC (polyvinyl chloride). PVC was able to stretch up to 50% while LDPE stretched 30%. Although PVC had the ability to stretch further than LDPE, PVC was deemed less reliable since it was more likely to tear.
This led to the second transformation in stretch film, which occured in the late 1970’s. The industry changed the formulation of LDPE, and a new type called LLDPE (linear low density polyethylene) was created. It proved to be reliable, durable, and stretched further than LDPE.
The third and final transformation (so far) took place in the 1980’s. Up until now, stretch films were single layered. In the 1980’s, triple layered films were becoming the new norm. About 10 years later, the number of layers increased to five. By 2000, the number of layers were between seven and nine, depending on the manufacturer. The additional layers are made up of different chemicals which help increase the qualities of the stretch film.
With so many stretch films to choose from, it is important to know what qualities are needed for your unique application--stretchability, durability, cold temperature etc. Our packaging experts are here to assist you in selecting the right product for your needs.