Definition
A functional layer applied to a substrate to add properties such as sealability, barrier, anti-fog, or slip.
Applications
- Heat-seal coatings on PET
- Primer coats for print adhesion
Benefits
- Adds targeted performance without changing base film
- Can enable new substrates
- Improves runnability
Industry Examples
- Medical: coating to tune COF for automated pouch feeding.
- Industrial: protective overprint varnish to improve abrasion resistance on bulk wraps.
- Electronics: anti-static or static-dissipative coatings are applied to films to meet surface resistivity targets per ANSI/ESD standards.
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FAQ
Q: Can coatings affect recyclability?
A: Yes—coating chemistry and layer thickness matter.
Q: Where should coatings be applied?
A: On the side that needs the function (seal side, print side, etc.).