Stretch film is a kind of packaging material in the logistics industry. It has been widely used in the logistics industry. There are many materials for the production of stretch films. Mainly depends on the application area of the product. So if you want to control the viscosity of the stretched film, you can work hard on the material.

The use of stretch film:

1. Can reduce labor
2. Moisture-proof
3. Dust-proof
4. Improve efficiency
5. Achieve the purpose of product protection
6. Reduce collective packaging costs for products or goods


Not all C4-LLDPE can be used for packaging stretch film. C6 and C8 materials are often used because of their easy processing. The temperature also affects the viscosity of the stretched film. Generally, we will place the product in an environment of 15 to 25 degrees. If the temperature exceeds thirty degrees, the viscosity will increase. If it is lower than fifteen degrees, the viscosity will deteriorate again.


Because stretched film will have polyethylene component. So we can adjust the amount of adhesive polyethylene. To achieve the desired viscosity. Due to the narrow molecular weight distribution of the stretched film, the processing range is also relatively narrow. Therefore, as long as five percent of polyethylene is added, the melt viscosity can be reduced. Thereby, the flatness of the stretched film will be improved to increase the flatness of the film.

The various cost factors for producing stretch film include:

1. Raw materials account for 80%;
2. Equipment accounts for 7%;
3. Paper core and other auxiliary materials account for 4%
4. Energy consumption accounts for 5%;
5. Labor, waste, experiment and marketing account for 4%.


It can be seen that raw materials have become the primary factor affecting the consumption cost of stretch-wound films. Thus, reducing the amount of raw materials and improving the process formula have become the main methods to reduce the consumption cost of stretch wound film. Of course, the impact factor of stretch film consumer equipment accounts for only 6%. But its reliability and quality are also important factors.


Any loss of raw materials due to poor performance of the consumer line and equipment defects will immediately have a great direct negative impact on the yield of the entire project. And think even if you increase the equipment investment by 10% to choose better equipment. Its capital ratio also increased from 6% to 6.6%.