What Is The Reason For The Poor Tensile Strength Of Stretch Wrapping Film? How Should We Solve It?

Reasons for the poor tensile strength of stretch wrapping film:

1. The heating capacity of the heating plate is not enough.

2. The heating temperature does not match, and when it is too high, the film sticks to the heat sealing plate, which increases the haze of the wrapping film, and the stretch forming will appear partially thin. When the heating temperature is too low, the heating temperature of the wrapping film is low, the stretching temperature of the film cannot be reached, and there are many breaks after stretching.

3. The stretching depth is too deep.

The solution to the poor tensile strength of stretch wrapping film:

If the temperature of the molten resin is too high, the longitudinal tensile strength of the stretched film will decrease; if the traction speed is slow, the longitudinal orientation of the stretched film will not be enough, so that the longitudinal tensile strength will be deteriorated; if the inflation ratio is too large, the same as the traction ratio The mismatch will increase the orientation and tensile strength of the film in the transverse direction, while the tensile strength in the longitudinal direction will be worse; the cooling rate of the film is too fast.

Stretch film can meet the diversified protection requirements of commodities and significantly improve the shelf life of commodities. Various functional materials of wrapping film can not only meet the barrier properties of water vapor, gas, grease, organic solvent and other substances, but also meet the requirements of anti-rust, anti-corrosion, anti-electromagnetic radiation, anti-static and anti-chemical properties. And aseptic preservation, non-toxic and non-polluting requirements.

Stretch film also has obvious advantages in resource and energy consumption, environmental protection and other aspects. The stretch film uses less natural materials, the weight ratio of the packaging material to the contents is small, and the ratio of the volume of the packaging to the contents is also small. Therefore, in terms of the variety and quantity of resource consumption, stretch film has incomparable advantages over other packaging forms. Because the material is light and soft, easy to fold, and easy to pack, the recycling and transportation of waste flexible packaging materials is quite convenient, and there are many waste disposal methods.