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What is a blown stretch film?
A blown film is created when a thick layer of extruded film emerges from a circular die and a large bubble of air is inserted. The volume of the bubble and original thickness determine the ultimate thickness of the material. The vertical bubble allows the film to cool gradually as it is pulled up by rollers which then collapse the bubble and control the thin, flat tube of film as it is wound.
A blown film is created when a thick layer of extruded film emerges from a circular die and a large bubble of air is inserted. The volume of the bubble and original thickness determine the ultimate thickness of the material. The vertical bubble allows the film to cool gradually as it is pulled up by rollers which then collapse the bubble and control the thin, flat tube of film as it is wound.
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