PTFE mesh belts are widely used in heat-intensive packaging conveyor systems, particularly in shrink tunnels and dry boxes, where constant exposure to high temperatures and polymer-based films require highly specialised, non-stick and dimensionally stable conveying solutions.
Constructed from a woven glass fibre substrate coated with high-grade PTFE (polytetrafluoroethylene), these belts combine mechanical strength, thermal stability and surface non-adhesion, making them ideal for automated packaging lines handling shrinkable plastic films such as polyolefins, PVC and polyethylene.
Non-stick surface
The ultra-low surface energy of the PTFE coating (coefficient of friction of approximately 0.05) prevents hot film residue, adhesives or product drips from bonding to the conveyor belt surface. This ensures
- Consistent product transport
- Reduced cleaning cycles
- Reduced belt fouling and improved hygiene
High Temperature Resistance
PTFE mesh belts can withstand continuous operating temperatures up to 500°F (260°C) and perform well during intermittent heat spikes. This makes them ideal for use in
- Heat shrink tunnels
- Infrared or convection dryers
- Film sealing and curing zones
Open mesh design
The mesh construction (typically 1 mm to 4 mm pore size) allows for unobstructed airflow and even heat distribution over the product surface. This results in:
- Uniform film shrinkage.
- Uniform film shrinkage is achieved.
- Reduced thermal stress on substrates.
Dimensional Stability
With a glass-fiber reinforcement, these belts exhibit minimal elongation under tension, ensuring precise belt tracking, minimal sag, and long service life in continuous operation lines.
Fast and Secure Belt Joining
Most belts are connected using stainless steel clipper or alligator joints, allowing quick belt changes during maintenance. Edge reinforcements using PTFE film or Kevlar stitching further enhance tracking and resistance to edge fraying.
Application Method: Conveyor Integration in Packaging Lines
In a typical heat shrink packaging line, the PTFE mesh belt functions as the primary transport surface within the heated tunnel:
1.Products wrapped in shrink film (e.g., polyolefin) are placed on the belt.
2.The open-mesh design ensures that hot air circulates from all angles, triggering uniform film shrinkage.
3.Non-stick PTFE prevents the film from sticking or melting onto the conveyor, ensuring flawless package finish and belt longevity.
4.After shrinkage, the product exits the tunnel ready for boxing or palletizing.
This method is widely used in the food, beverage, cosmetics, pharmaceuticals, and consumer goods industries.
Each belt is customizable in width, length, edge reinforcement type, and joint configuration to suit specific OEM machine requirements.
Why Use PTFE Mesh Belts in Packaging Conveyors?
- Reduces film sticking and maintenance downtime
- Operates reliably in high-temperature tunnels
- Reusable and long-life – cost-effective for high-throughput lines
- Compatible with a wide range of film types and product shapes
- Easy to clean and FDA-compliant coatings available for food contact
Conclusion
PTFE mesh conveyor belts are a critical component in modern shrink packaging systems, combining advanced material science with precision engineering to deliver maximum throughput, minimal maintenance, and superior packaging quality.
For custom belt fabrication, OEM integration consultation, or technical datasheets of specific grades , please contact our technical sales team(info@anligu.net).
