Cling performance is one of the most critical properties of stretch film.
It directly affects load stability, wrapping efficiency, and transportation safety.
In commercial stretch film production, film cling generally comes from three main sources:
1. Natural Cling from Raw Materials
High-quality stretch film relies on polyethylene resins with inherent self-cling properties.
Certain resin grades naturally provide:
stable surface tack
consistent cling force
long-term holding performance
This type of cling is uniform, controllable, and aging-resistant, making it ideal for premium hand and machine stretch films.
2. Glue-Based Cling Enhancement
Some low-cost stretch films achieve cling by adding surface glue or adhesive agents.
While this method can create strong initial stickiness, it often brings drawbacks:
uneven cling distribution
dust and contamination pickup
unstable performance in high or low temperatures
This approach is usually used in short-term or low-end applications where cost is prioritized over consistency.
3. Cling Masterbatch (Additive-Based Cling)
Cling masterbatch is a widely used industrial solution.
By blending specific tackifying additives into the resin, manufacturers can:
precisely control cling strength
adjust single-side or double-side cling
balance cling with stretch and tear resistance
This method offers good consistency and scalability, especially for OEM and customized stretch film products.
Conclusion
Different cling sources lead to very different wrapping experiences and long-term performance.
Choosing the right cling system is not about “more stick,” but about stable, clean, and predictable adhesion.
For professional packaging operations, cling should always be evaluated together with stretch ratio, puncture resistance, and environmental stability.
Post time: Dec-29-2025