Standards for distinguishing between high viscosity protective film and low viscosity protective film
May 07, 2020
The standard for distinguishing between high-viscosity protective film and low-viscosity protective film. The protective film also has viscosity. Generally, the glossy protective film adopts electrostatic adsorption method to prevent the protective film from sticking to it and cannot be processed, but many building material protective films will use high Viscosity protective film, such as our common stainless steel protective film, acrylic plate protective film, etc., if it is not torn off for a long time, it will be difficult to handle. Many newcomers to die-cutting are not very clear about the concept of protective film viscosity. Let's take a look at the criteria for distinguishing between high and low mucosa.
The viscosity unit of the protective film is g/25mm, which refers to how much g is required to pull the 25mm wide spline. The performance of the protective film is divided according to the adhesive force: ultra-low viscosity protective film (micro-sticky protective film), low viscosity Protective film, medium viscosity protective film, high viscosity protective film, ultra high viscosity protective film.
In fact, many times, some suppliers say that 40g is also low-viscosity, and he says that 3--5g is ultra-low viscosity. 40 grams is not low viscosity anymore. Of course, this standard is relative. If his standard is 50 for low viscosity, then there is nothing wrong with it.
But as a rule, we think that 10G or less is slightly sticky and has a weak stickiness.
In fact, dividing by viscosity is a rough concept: 3-20g-slightly sticky, 30-low sticky, 40-medium low sticky, 50, 60 is-medium sticky, 70-medium high sticky, above 80 - High viscosity.
Although there is no international standard for the protection film according to the division of adhesion, for the die-cutting industry, the distinction of the protection film's viscosity is to select a more suitable protection film for die-cut products. The basic principle of the choice of the viscosity of the protective film is that the viscosity is appropriate. Different surfaces require different viscosities.
