Packaging performance is often evaluated through barrier properties, shelf appeal, and sustainability goals. But for operations and co-packers, the true measure of success is how consistently a film runs on the line. Machinability audits bridge the gap between material science and manufacturing reality—connecting film properties like coefficient of friction (COF), stiffness, and seal behavior to measurable outcomes such as uptime, waste, and overall equipment effectiveness (OEE).
Why Machinability Matters More Than Ever
Modern VFFS and HFFS lines operate at increasingly high speeds with tighter tolerances. Small variations in film properties that were once manageable can now lead to micro-stops, tracking issues, or inconsistent seals. For brand owners and operations teams, these issues surface as lost throughput, higher scrap rates, and frustration at the co-packer level. A machinability audit provides a structured way to identify and correct these problems before they become systemic.
What Is a Machinability Audit?
A machinability audit is a structured, on-site or trial-based evaluation of how a flexible film performs across the full packaging process. On VFFS and HFFS equipment, this means observing and measuring film behavior during unwinding, web handling, forming, sealing, and cutting. The goal is not to assign blame to the material or the machine, but to understand how the two interact under real production conditions.
Key Variables to Capture During an Audit
Effective audits focus on a short list of variables that have an outsized impact on performance:
– Coefficient of Friction (COF): Inside and outside COF influence feeding, tracking, and release from forming components.
– Stiffness and Modulus: These affect how the web holds shape at speed, especially through forming collars and sealing jaws.
– Gauge and Thickness Tolerance: Variability here can cause inconsistent bag length, seal pressure issues, or cutting defects.
– Seal Window and Hot Tack: Determines how forgiving the film is across normal temperature and dwell fluctuations.
– Ink and Varnish Interaction: Surface treatments can unintentionally change COF or create build-up on machine components.
A Simple Machinability Audit Template
A practical audit does not need to be complex. Many teams start with a checklist-based approach:
- Document line speed, scrap rate, and OEE before the trial.
- Record film specifications and target COF ranges.
- Observe web tracking, forming quality, and seal appearance during production.
- Note any adjustments operators make to compensate for film behavior.
- Compare results across shifts or machines when possible.
Fast Wins Brands Often Overlook
Many machinability issues can be addressed quickly once they are visible. Tightening COF guardrails can reduce start-up waste. Improving gauge consistency can stabilize bag length and registration. Aligning sealant choice with actual line temperatures can reduce leaks without slowing production. These incremental improvements often translate into meaningful OEE gains with minimal capital investment.
Where Layfield Fits
Layfield’s Vertiflex™ VFFS and HFFS films are engineered to deliver reliable performance, consistent run-ability, and robust production protection. Each film structure is designed with targeted barrier properties, customized seal‑initiation ranges compatible with all side‑ and bottom‑seal formats, multiple COF options to prevent collar buildup, uniform stiffness, and broad, forgiving seal windows. Our goal is to support customers not only in standardizing product performance but also in enhancing plant efficiency and reducing operational costs.
Our technical team works directly with brand owners and co‑packers during on‑site line trials and production tests to ensure films run smoothly on VFFS and HFFS equipment. Insights from these real‑world evaluations are translated into clear, actionable recommendations that support plant efficiency, reduce operational risk, and improve overall line performance.
Conclusion
Machinability audits turn packaging films from a variable into a lever for performance. For operations-focused brand teams, they offer a practical path to higher OEE, lower waste, and stronger partnerships with co-packers. By linking film properties directly to line behavior, audits create clarity—and clarity drives results.
Explore Vertiflex™ VFFS film solutions and learn how machinability-focused design can support your operations:
Related Articles
View All News
