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The main factors affecting the viscosity of protective film
- Jul 04, 2018 -

Different surfaces require different stickiness. According to the different surface and pressure, the speed of viscosity rise is different. Generally, it is necessary to put enough time before stripping the protective film to determine whether the viscosity is suitable. The protective effect of rubber and acrylic acid is different. Rubber is relatively soft, acrylic is relatively hard, generally first consider the rubber type protective film, followed by acrylic protective film.

The main factors affecting the viscosity of protective film

Wetting: pressure sensitive adhesive can only achieve close contact with the surface of the sticky object, creating conditions for the combination of physical chemistry.

The movement and diffusion of molecules: pressure sensitive adhesive molecules move to the surface of the sticky material. When the distance key between the two is less than 5A, the physical chemistry bond will occur.

Permeability: the glue layer flow, under certain pressure, to the groove and the gap, so that the contact area between the two increases, then the adhesive and the adhesive material between the mechanical bonding force.

Model selection

Different surfaces need different stickiness.

Similarly, different surfaces may require different viscosity.

The processing step is the key to determining the stickiness. Follow up processes include bending, stamping, cutting, drilling, thermoforming, etc.

The rational combination of thickness and stickiness;

The tensile strength and elongation of the protective film are to ensure that the flexibility and strength of the protective film can meet the requirements.

The ultimate principle of protective film selection: full test.


Wuxi Shengfa Protection Film Co., Ltd