Definition
Film made by extruding molten polymer through a flat die onto a chill roll, producing uniform gauge and high clarity.
Applications
- Sealant webs
- Laminated structures
- Stretch overwrap applications
Benefits
- Excellent transparency
- Tight thickness control
- Smooth surface for sealing/coating
Industry Examples
- Medical: clear cast PE for pouch sealant webs requiring consistent SIT performance.
- Industrial: cast LLDPE liners for bulk bags where uniform gauge reduces weak spots.
- Electronics: provides uniform gauge sealant layers in static-dissipative pouches where consistent heat sealing is critical.
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FAQ
Q: How does cast differ from blown film?
A: Cast is clearer with tighter gauge; blown often offers better toughness.
Q: When choose cast?
A: When clarity and gauge uniformity are critical.