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Views: 243 Author: Hlunpack Publish Time: 2026-03-10 Origin: Hlunpack
As demand for Pop Rocks and popping candy packaging continues to rise globally, manufacturers are rapidly upgrading to high-speed film packaging machines to stay competitive. However, beyond 400 bags per minute, many production lines encounter a critical bottleneck: packaging film performance, not machine capability.
In this case study, we explore how HLUNPACK, a specialist in high-speed flexible packaging solutions, helped a confectionery manufacturer break through this barrier—achieving stable production at 500 bags per minute, while significantly improving efficiency, consistency, and cost control.
The client is a mid-to-large-scale confectionery manufacturer producing Pop Rocks (popping candy) for export markets. The product's sensitivity to moisture and pressure creates unique packaging challenges.
Key specifications:
- Product type: Pop Rocks (moisture-sensitive popping candy)
- Fill weight: 5g–10g per sachet
- Package format: Four-side seal sachet
- Daily operation: 16–20 hours continuous production
The production line utilized a continuous motion roller mold high-speed packaging machine with a design capacity of:
- Maximum speed: 500 bags per minute
While the machine itself was capable of sustained ultra-high-speed operation, performance issues emerged when scaling beyond 400 bags per minute.
The customer initially used a conventional laminate:
- PET12 / VMPET12 / PE60
This structure performed adequately at moderate speeds (200–300 bags/min), but at higher speeds, multiple issues began to surface—impacting production stability and product quality.
At 500 bags per minute, film speeds reached approximately 35–60 meters per minute. Under these conditions, the existing film lacked sufficient dimensional stability.
Observed issues:
- Registration mark drifting
- Print-to-cut misalignment
- Inconsistent pouch appearance
Performance metrics:
- Registration accuracy: ~96.5%
- Packaging waste rate: >3%
For a line producing over 800,000 sachets daily, even small deviations translated into substantial material losses and rework costs.
Pop Rocks require a strictly controlled internal environment. Any moisture ingress can prematurely trigger the popping reaction, degrading product quality.
Problems with the original film:
- Inconsistent seal strength
- Occasional weak seals
- Package failure during transport
ASTM F88 testing results:
- Seal strength: 22 N/15 mm ± 3 N
This level was insufficient for high-speed sealing, especially under continuous motion conditions.
At elevated speeds, the film exhibited poor mechanical behavior:
- Web wandering
- Wrinkling
- Tension fluctuations
Operational impact:
- Frequent manual adjustments
- Average downtime: 32 minutes per shift
- Overall Equipment Effectiveness (OEE): 82%
These inefficiencies disrupted production schedules and increased labor dependency.
After a comprehensive evaluation of machine dynamics, material properties, and production data, HLUNPACK engineers identified critical performance thresholds required for stable operation above 400 bags per minute.
- Print registration accuracy: ≤ ±0.10 mm
- Thickness tolerance: ≤ ±3%
- Dynamic coefficient of friction (COF): 0.18–0.22
- Seal response time: ≤ 0.20 seconds
- Seal temperature window: 110°C–145°C
- WVTR (water vapor transmission rate): < 0.5 g/m²/24h
- OTR (oxygen transmission rate): < 1 cc/m²/24h
For Pop Rocks packaging, moisture barrier performance is especially critical, as product functionality depends on maintaining a dry internal environment throughout storage and distribution.
HLUNPACK developed a customized sealant layer tailored for continuous motion high-speed packaging machines.
Key improvements:
- Seal initiation temperature reduced by ~12°C
- Seal response speed improved by ~25%
- Wider sealing window for greater process stability
Updated ASTM F88 results:
- Seal strength increased to 36 N/15 mm ± 2 N
- Improvement of approximately 64%
This ensured consistent sealing performance even under ultra-fast cycling conditions.
To address alignment issues, HLUNPACK implemented:
- High-precision electronic shaft printing technology
- Enhanced tension control systems
Results:
- Registration accuracy improved to ≤ ±0.10 mm
- Near-perfect consistency during long production runs
This significantly reduced visual defects and improved brand presentation.
By optimizing lamination and curing processes, HLUNPACK enhanced film uniformity:
- Thickness tolerance reduced to ≤ ±3%
- Film flatness improved by over 30%
Impact:
- Reduced wrinkling and web wandering
- Stable film tracking at high speeds
- Less need for manual intervention
Given the sensitivity of popping candy, barrier performance was a top priority.
- WVTR reduced from 1.2 to 0.4 g/m²/24h
- OTR reduced from 3.5 to 0.8 cc/m²/24h
These improvements ensured:
- Extended shelf life
- Preservation of popping effect
- Improved product integrity during transportation
Following implementation, the optimized film underwent a 72-hour continuous production test.
- Packaging speed: 450 → 500 bags/min
- Registration accuracy: 96.5% → 99.8%
- Seal strength: 22 → 36 N/15 mm
- Packaging waste rate: 3.2% → 0.4%
- Downtime per shift: 32 min → <5 min
- OEE: 82% → 94%
From a business perspective, the improvements delivered measurable ROI:
- Material waste reduced by over 85%
- Production uptime significantly increased
- Labor intervention minimized
- Product consistency enhanced
For manufacturers operating at scale, these gains translate directly into lower unit costs and higher profitability.
This case highlights a key industry shift:
At ultra-high speeds, packaging film becomes a core production variable—not just a consumable material.
- Machine upgrades alone cannot guarantee higher output
- Film structure must be engineered for speed, stability, and sealing performance
- Barrier properties are essential for moisture-sensitive products
- Precision in film manufacturing directly impacts OEE
For example, a manufacturer increasing speed from 300 to 500 bags per minute without upgrading film may experience higher defect rates—negating productivity gains.
With over 36 years of experience in flexible packaging manufacturing, HLUNPACK combines material science expertise with real-world production insights.
Core strengths:
- Customized film solutions for high-speed packaging machines
- Deep understanding of confectionery and snack packaging requirements
- Proven performance in ultra-high-speed production environments
- End-to-end support from analysis to implementation
Whether packaging Pop Rocks, candies, powders, or granular products, HLUNPACK delivers solutions designed for efficiency, reliability, and scalability.
This case demonstrates that achieving stable production at 500 bags per minute is not solely dependent on equipment—it requires a holistic optimization of packaging materials.
By addressing sealing dynamics, film stability, and barrier performance, HLUNPACK enabled the customer to transform their production line into a high-efficiency operation.
For manufacturers aiming to scale output without compromising quality, investing in high-performance packaging film is no longer optional—it is essential.
