Definition
A surface-active additive or coating used to increase bond strength between inks/adhesives and low-energy films (e.g., PE/PP).
Applications
- Solventless laminations on PE/PP
- Metallized film bonding
Benefits
- Reduces delamination
- improves ink/adhesive wet-out
- stabilizes bond after aging/heat cycling
Industry Examples
- Medical: improves adhesive anchorage in laminated sterile barrier pouches that undergo seal validation.
- Industrial: increases bond integrity in chemical product overwraps exposed to oils and abrasion.
- Electronics: improves ink and adhesive bonding on static-dissipative polyethylene films used for ESD shielding bags, preventing delamination under humidity cycling.
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FAQ
Q: When do you need an adhesion promoter?
A: When printing/laminating on low-surface-energy PE or PP.
Q: Can it fix poor surface treatment?
A: It helps, but it can’t replace correct dyne level and process control.