Stretch wrapping film is a kind of plastic product. It has been widely used in the logistics industry. Stretch film has the advantages of thin thickness, high viscosity, high elasticity, strong toughness, resistance to pulling, and not easy to break. It is widely used in articles. However, sometimes it is easy to break. Today, the Zhiteng stretch film manufacturer will give you an analysis of the reasons why the stretch wrap film is easy to break.

 

1. In transporting the stretch wrapping film, the damaged box will rub the edges of the stretch film so that the stretch film will easily break during use.

 

2. In the process of opening the box, the user of the stretch film cuts the sealing tape because the knife is inserted too deeply, and at the same time, the edge of the stretch film is scratched, which causes the stretch film to break when it is used.

 

3. The thickness is not up to the requirement, or the recycled material is used, the thickness of the machine film is generally about 2.8-3.2 filaments, and the pre-stretched machine requires a higher stretch rate, so be sure to add 30%-50% metallocene, There is a significant improvement in the pulling force.

 

Tensile force and elongation at break are also called tensile properties. Tensile performance is a critical index of stretch film. The width is 15mm, the distance between the chucks of the tensile testing machine is 50mm, the gauge length is 50mm, and the test speed is 250mm/min. The method of ±25mm/min is used to test this item. The use of long samples can eliminate the need for an extensometer, which also avoids the phenomenon that the stretch film is fragile, and the friction on it is greatly affected by elongation, which may cause breakage.