Several Factors Affecting Relaxation of Stretch Wrap Film

Guangdong Huaping Hygiene Material Industrial Co.,Ltd. main products include Stretch Wrap Film,PE breathable film,PE perforated film,Multicolor printed film,Nonwoven Laminated film,Anti-counterfeiting Holographic film etc .

PE stretch wrap film is mainly used in the packaging industry, regardless of the shape and size of the product, etc., the advantages of stretch wrap film as a special feature work well. However, some users found that the reason for the phenomenon of things being scattered when carrying things is that the stretch wrapping film itself of the packaging has changed, and the slack of the stretch wrapping film has decreased a lot. So, what about the packaging of the PE stretch film, does it affect the slack of the stretch film?

1.Aluminized transmission occurs during aluminizing, and coating layer movement occurs during gluing. The main measure to prevent corona on the back of the stretch wrapping film is to adjust the pressure of the rubber extrusion roller in front of the corona treatment roller, and the pressure at both ends of the extrusion roller. The pressure must be consistent and the pressure should be appropriate.

2.Polyester is a polar polymer with high surface free energy and surface wetting tension greater than 40 factors/cm. However, for high-speed color printing, or to improve the bonding force between the vacuum aluminized layer and the stretched stretch film surface , The surface treatment of the stretch stretch film also needs to further increase the surface wet tension.

3.Non-polar polymer, the surface free energy of the roll film is small, and the surface wetting tension is low, generally about 30 in/cm. , In theory, if the surface tension of the object is lower than 33 multiin/cm, ordinary ink or adhesive cannot be firmly attached, and its surface must be treated.

We can know from the answers of experts that the loosening of the stretch film surface depends on the molecular structure of the film material itself, and the free energy of the stretch film surface can also determine whether the stretch film is suitable. Therefore, the stretch film The performance of all aspects is interconnected, regardless of the production period or use time of the stretch stretch film, relevant work must be carried out in accordance with the regulations, and many precautions must be mastered.

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