Stretch film is used for packaging. But protective film can be used in many ways. For example, protective films like static film and film with glue are used in industry to protect the surface of the products from pollution, damage, dust and keep them clean during production and transpotation to increase the market competitiveness of the products.
In fact, they are quite similar. But the quality of materials is different.
Sretch film is self-adhesive. And the surface of protective film is coated with a layer of glue. Stretch film is similar to the preservative film we often use. But stretch film is used in industry. Preservative film is used on foodstuff. Protective film is used on the screen of mobile phone. I don't know whether I made it clear.
Generally, stretch film is made from PE meterial added adhesive additives ,like PIB master batch. It's produced by flowing spread processing. The surface of the film is slight adhesive that can make the films stick to each other. It's mainly used to pack and twine things to fix the things. Protective films can be classified into many types. The most common type is PE film coated with a layer of glue, just like scotch tape used in daily life, mainly used to protect solid surface. You can tear it off when you don't use it.
