zhiteng stretch film

Stretch film  has been widely used in many industries. Stretch film has a certain degree of shrinkage, and there will be excessive shrinkage during the production process. Today, Zhiteng stretch film  manufacturer  will introduce you to stretching. The reason for the excessive shrinkage of the film, if you have any question，please feel free to  contact us . The stretched film shrinks too much during the stretched film process and cannot meet the width requirements of the product. In the secondary composite process, the thermal shrinkage is too large, exceeding the standard requirements, and cannot meet the width requirements of the product. The raw material of the stretched film is an amorphous polymer. In a certain temperature range, when the stretched film force is greater than the yield strength, plastic stretch deformation occurs. During the deformation process, the polymer structural unit starts due to stretching. Directional. As the degree of orientation increa...

  The stretch film has good stretchability and can tightly wrap the object. If the stretchability is poor, it will easily cause breakage, which will not only waste resources, but also delay the efficiency of packaging. Today, Zhiteng stretch film manufacturers will introduce to you the factors that affect the stretching function of stretch films. The stretch ratio is a very important performance parameter. The longitudinal and transverse stretch ratios have a significant impact on the energy of the stretched film. At a certain temperature, the greater the stretching ratio, the greater the orientation of the pp molecular chain. The modulus increases, the elongation at break decreases, the impact strength and fold resistance increase, and the air permeability and gloss increase. In the process of longitudinal stretching and transverse stretching of the stretched film, after the longitudinal stretching, the transverse stretching effect becomes worse. After further transverse stretchin...

  Stretch film   is a packaging material in the packaging industry. In the logistics industry, goods can be wrapped tightly, which is convenient for transportation and has good effects of preventing looseness, rain and dust. The thickness of the stretch film is mainly determined by the packaging intent and the shelf life of the product. The theoretical shelf life of the designed packaging is estimated based on the thickness of the data and the packaging intent to verify the rationality of the designed stretch film packaging. First of all, if the thickness of the stretched film is relatively large, stretching will be more difficult, especially the hand wound wrapping film, which will reduce the work efficiency. Second, the thicker the stretched film, the lower its viscosity. The stickiness of the stretch film is its own characteristic. In production, adding plasticizers such as DOV to form a stretched film that is too thick has different requirements during the production proce...