08 Oct 2024In modern industry and daily life, we often come into contact with a variety of plastic products, and polyethylene film is even more ubiquitous. From food bags in the supermarket to greenhouse films in the farmland, from garbage bags to industrial packaging films, polyethylene film has become an indispensable part of our lives due to its excellent performance and wide range of applications. The key equipment for manufacturing these polyethylene films is the PE Film Blowing Machine.
The working principle of PE Film Blowing Machine is not complicated but full of technological charm. First, raw materials such as polyethylene pellets are added to the hopper of the blown film machine. These raw materials are screened and dried to ensure that they are of the required quality. The raw materials are then heated and melted in the extruder, which is usually divided into several heating zones, each of which can be independently temperature controlled to ensure that the raw materials are melted evenly.
The molten melt is extruded through the head of the extruder to form a round, tubular film. The design and construction of the head has a critical impact on the quality and performance of the film. The tubular film extruded from the head enters a blowing unit where compressed air is blown uniformly into the tubular film, causing the film to expand under the pressure of the air to form the desired film thickness and width. At the same time, the film is also cooled by a cooling device during the blowing process. The cooling air ring and the cooling water source work together to cool and shape the film quickly.
Finally, the cooled and shaped film is towed to the winding device through the traction device, and the winding rollers wind the film into rolls to complete the whole production process.
High and low pressure film blowing machine
It can be used to produce high and low pressure polyethylene film. High-pressure polyethylene film has good transparency and flexibility, suitable for food packaging and other fields; low-pressure polyethylene film has high strength and heat resistance, commonly used in industrial packaging and other aspects.
Multi-layer co-extrusion blown film machine
It is capable of extruding multi-layer films of different materials at the same time. Through reasonable structural design and process control, it can realize various films with special properties, such as barrier, freshness and heat sealing. This kind of blown film machine has a wide range of applications in the field of high-end packaging.
Rotary head blown film machine
The head can be rotated to make the thickness of the film more uniform and improve product quality. At the same time, the rotary head can also be easily replaced with different sizes of molds to adapt to different production needs.
Packaging Industry
Polyethylene film is widely used in the packaging of various products such as food, medicine, chemical, daily necessities and so on. Food packaging bags, cling film, industrial packaging film, etc. are all common applications of polyethylene films. These films not only protect the products but also provide good presentation.
Agriculture
It is used in the production of agricultural films such as greenhouse films and mulch films. The greenhouse film can provide a suitable growing environment for crops, heat preservation, moisture preservation, insect protection and rain protection; the ground film can increase the soil temperature, maintain soil humidity and promote the growth of crops.
Other fields
It can also be used to make garbage bags, lining film for plastic woven bags, waterproofing rolls and so on. In these fields, polyethylene film also plays an important role.
Efficient Production
Continuous production and high production efficiency meet the needs of mass production. A state-of-the-art PE Film Blowing Machine can produce large quantities of high quality film in a short period of time.
Consistent product quality
Precise temperature control, extrusion pressure control and cooling systems allow the production of films with uniform thickness and consistent properties. This is essential to ensure product quality.
Flexibility
The thickness, width and properties of the film can be adjusted to suit different market needs. Whether it's ultra-thin cling film or thick industrial packaging film, polyethylene blown film machines can handle it with ease.
Lower cost
The relatively low price of PE raw materials and the reasonable equipment and operating costs of PE film blowing machines make PE film cost-effective.
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