Many people are not very clear about the concept of protective film viscosity.
The viscosity unit of the protective film is g/25mm, which is the amount of gram required to peel a piece of 25mm wide film sample.
According to the strength of the adhesive, protective film can be further divided into micro-adhesive protective film, low-viscosity protective film, medium-low-viscosity protective film, medium-viscosity protective film, medium-high-viscosity protective film, high-viscosity protective film, and ultra-high-viscosity protective film.
Most of the time, some suppliers call 50 grams low-viscosity and call 3-5 grams ultra-low viscosity. Of course, this standard is relative. If standard calls 50 low viscosity, then there is nothing wrong with it.
In fact, seperating protective film according to the viscosity is a rough concept, 3-40g can be regarded as slightly sticky, 40g-60g is low viscosity, 60g-80g is medium-low viscosity, 80g-130g is medium viscosity, 130g-150g is medium-high viscosity, 150g-200g is considered to be highly adhesive, and more than 200g is super high viscosity.
Different suppliers have different standards for adhesion. We suggest customers asking suppliers for suggestions and collecting protective film samples from suppliers and do full experiment on your products before placing orders.