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The manufacturing conditions of PE protective film and the influencing factors of its viscosity
- Jun 09, 2018 -

There are three basic conditions for making a PE protective film. The first is a PE protective film adhesive, which is a viscoelastic polymer. The adhesive layer can be in close contact with the surface of the adherend and flow into the groove of the adhered surface as much as possible, so that the effective contact area increases.

 

The second is to control the main factors affecting the viscosity of the PE protective film—wetting and penetration. The pressure-sensitive adhesive can achieve close contact only with good wetting on the surface of the adhered object to create the movement and diffusion of the conditional molecules for physical and chemical bonding; Sensitive glue molecules will move to the surface of the material to be adhered, and when the distance between the two is less than a certain degree, physical and chemical bonds will be generated.

 

When the adhesive layer flows and penetrates into the recesses and voids under a certain pressure, the contact area between the adhesive and the adhered material is increased, and a mechanical adhesive force is then generated between the adhesive and the adhered material, and the PE protective film pair can be promoted. Sticky materials play an effective protective role.

 

The other is the surface treatment of the PE protective film substrate film, one of which is corona treatment in order to form polar reactive groups and form extremely fine pits. Another is coating, which is to evenly coat the liquid glue on the substrate film and dry it.

 

In the protective film industry, viscosity is one of the main factors affecting its use. The PE protective film is also the same. The viscosity of the maintenance film is determined by the ratio of the raw material glue and the amount of glue applied. In order to make the PE protective film sticky, we generally use the pressure sensitive adhesive; in the process of applying the pressure sensitive adhesive, when the adhesive is applied, besides the stickiness of the protective film itself, it also has the direct relation with the temperature, the sticking and the storage. contact.

 

At present, the viscosity of PE protective film is mainly determined by the thickness of the silicone. Due to the high thickness, the viscosity of the protective film is relatively improved. However, in the high temperature environment, the silicone will exhibit undesirable phenomena due to the principle of thermal expansion and contraction, so the PE Protective film silicone thickness can not be too thick.

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