Vented Machine Stretch Film
OPALUS PACK is a manufacturer of vented machine stretch film for automatic pallet wrapping lines where airflow, cooling speed, and pallet stability must work together. This ventilated stretch film is built for fresh produce, beverage pallets, cold chain goods, and agricultural loads that should not be sealed like dry cargo. Its engineered perforations open during machine pre-stretch, allowing moisture vapor and trapped heat to escape while keeping the load tight enough for storage, handling, and transport.
- Product name: Vented Machine Stretch Film
- Brand: OPALUS PACK
- Film type: Perforated machine stretch film for pallet wrapping
- Material: Multi-layer cast LLDPE
- Machine use: Automatic and semi-automatic wrapping systems
- Main use: Cold chain, produce, beverage, and breathable pallet wrap applications
Key Features of Our Machine Roll Stretch Film
Product Overview
Standard machine film can hold a pallet firmly, but it can also trap heat and moisture inside the load. For fresh vegetables, fruit cartons, dairy goods, flowers, or warm-filled beverage pallets, that trapped moisture may lead to softened cartons, wet labels, slower cooling, or visible condensation after cold storage transfer.
OPALUS PACK produces this vented pallet wrap for these conditions. The film uses a controlled perforation pattern, so air can move through the wrapped pallet instead of being blocked by a closed plastic layer. In regular machine settings, it is commonly applied at 200% – 300% pre-stretch, depending on pallet shape, wrapper tension, load weight, and corner sharpness.
The important detail is how the holes behave under stretch. Poorly balanced perforations may open unevenly and tear near the edge. Our film is designed so the center area provides airflow while the edge zones retain stronger tension support. This helps the film run more smoothly on turntable and rotary arm machines, especially with mixed cartons or unstable agricultural loads.
Benefits
- Helps reduce condensation during cold-to-ambient temperature changes
- Allows moisture vapor to escape from wrapped pallet layers
- Supports fruit and vegetable respiration during transport
- Improves cooling airflow for warm-filled or freshly packed loads
- Runs on automatic wrappers with 200% – 300% pre-stretch settings
- Helps maintain stability for 300 – 1500 kg pallet loads
- Reduces edge tearing risk during high-tension wrapping
- Keeps labels and barcodes easier to inspect through clear film
How does vented machine stretch film improve cooling efficiency in cold chain pallet wrapping?
Vented machine stretch film improves cooling efficiency by reducing the plastic blanket effect created by ordinary stretch wrap. When a warm or freshly packed pallet is sealed too tightly, trapped heat stays between carton layers. With a controlled perforation pattern, cooler warehouse air can pass through the pallet more easily while warm air and moisture vapor escape. This is most useful during the first storage stage after wrapping, when beverages, produce cartons, or chilled goods are moving toward a stable storage temperature.
Technical Data Sheet (TDS)
| Item | Typical Value |
|---|---|
| Product Type | Vented machine stretch film |
| Material | Multi-layer cast LLDPE |
| Thickness | 17 – 30 um |
| Roll Width | 450 mm, 500 mm, or machine-specific width |
| Roll Length | 1200 m – 3000 m |
| Core Size | 3 inch paper core |
| Pre-stretch Range | 200% – 300% |
| Ventilation Open Area | 5% – 25% depending on perforation pattern |
| Perforation Style | Micro holes or larger airflow holes |
| Hole Distribution | Uniform or application-based spacing |
| Tensile Strength MD | >= 25 MPa |
| Load Range | 300 – 1500 kg pallet loads |
| Machine Compatibility | Automatic and semi-automatic pallet wrapping machines |
Applications
- Fresh fruit and vegetable export pallets
- Leafy greens, berries, citrus, and mixed produce cartons
- Beverage pallets after filling or short cooling periods
- Dairy and refrigerated food distribution
- Flower, plant, and horticulture pallet transport
- Agricultural packing houses and cold chain warehouses
- Automated pallet wrapping lines with high daily output
What perforation details affect airflow and film strength?
The hole pattern is not only about making the film breathable. Hole size, spacing, and edge position all affect how the film runs on a machine. Smaller perforations usually provide steadier containment for lighter cartons, while larger openings increase airflow for high-moisture produce. During 200% – 300% pre-stretch, the holes must expand evenly. If the spacing is too aggressive, tearing can start near the edge or around sharp pallet corners. A reliable perforated machine stretch film keeps airflow in the center area while preserving enough edge strength for wrapping tension.
FAQ
Can this film run on automatic pallet wrapping machines?
Yes. It is made for automatic and semi-automatic pallet wrapping systems, including common turntable and rotary arm machines.
Will the holes make the pallet unstable?
Not when the film is matched to the load. The edge strength and perforation spacing are designed to keep containment while allowing airflow.
Is it suitable for fresh produce pallets?
Yes. It is especially useful for fruits, vegetables, flowers, and other goods that need breathable pallet wrap instead of a fully sealed film layer.
Does it help reduce condensation in cold storage?
Yes. The ventilation structure helps moisture vapor escape during temperature changes, reducing the chance of condensation forming inside the wrapped pallet.