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What are the Working Processes of Blown Film Machine?
Blow molding is one of the extrusion processes for making a film product, and further expands the film by transferring air pressure. After the film has expanded to the desired size, it is allowed to cool to solidify the polymer, which is a rough blow molding process. The thickness of the film is usually less than 0.254 mm, while the actual blow molding technique can be as thick as 0.5 mm.
The blow molding process can be used to produce a variety of products, such as common single bags, which are mostly simple mono-layer films, and multi-layer structures for food packaging. The multi-layer film structure can be fabricated by blow molding co-extrusion equipment, combining two or more molten polymer layers. At present, most of the industry can reach 7 to 11 layers of co-extrusion equipment and technology.
The blow molding process can be used to produce a variety of products, such as common single bags, which are mostly simple mono-layer films, and multi-layer structures for food packaging. The multi-layer film structure can be fabricated by blow molding co-extrusion equipment, combining two or more molten polymer layers. At present, most of the industry can reach 7 to 11 layers of co-extrusion equipment and technology.
The application of the blow molding machine is as follows:
- Industrial film and bag
- Agricultural or architectural film
- Barrier film
- Stretch film
- PVC food cling film
- Laminate film
- Can liners
- High barrier tubule systems
Reference:sciencedirect
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