Bubble film extrusion is a manufacturing process used to create thin, flexible plastic films. It involves extruding molten polymer through a circular die to form a "bubble," which is then cooled and transformed into a continuous film. This process enables the production of packaging films, bags, and technical films with uniform characteristics and high performance.
How does the bubble film extrusion process work?
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Polymer melting: Plastic material, usually Polyethylene (PE), is heated and melted inside the extruder.
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Bubble formation: The molten polymer is pushed through a circular die, creating a tube of molten plastic. This tube is immediately inflated with an air stream to form a thin, continuous bubble.
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Cooling and winding: The bubble is gradually cooled using air flows, and the resulting film is rolled into coils ready for further processing.
What is bubble film extrusion used for?
The bubble extrusion process is widely employed to produce a variety of plastic films used in different industries:
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Packaging: Bubble films are used to create flexible packaging, bags, and protective films, ideal for food and industrial products.
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Technical films: These are used in specialized applications such as agricultural covers, industrial packaging, and barrier films with protective properties against moisture and oxygen.
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Shrink films: Used to wrap products, providing protection and security during transport and storage.
