20 Inch × 5000 Ft Blown Machine Stretch Film
- Width: 20 inch machine stretch film roll
- Length: 5000 ft per roll
- Structure: Blown extrusion LLDPE stretch film
- Gauge Options: 75, 80, 90 gauge grades
- Core: Machine stretch film core format
- Application: Automatic and semi-automatic pallet wrapping
Foshan Opalus Adhesive Products Co., Ltd supplies stretch wrap 20 blown 5000 for industrial pallet wrapping applications where puncture tolerance, cling and load stability are critical. This 20 inch x 5000 ft blown machine stretch film is produced through a blown extrusion process and is commonly selected for irregular pallets, cornered products and loads that require reliable film performance during handling and transportation.
Product Overview
20 Inch × 5000 Ft Blown Machine Stretch Film is manufactured from LLDPE resin through a blown extrusion process where bubble formation, cooling balance and winding control influence the final film performance. Compared with cast film produced through chill-roll cooling, this structure creates different surface characteristics, cling behavior and mechanical response during pallet wrapping.
In actual wrapping operations, the blown structure affects several factors that are easy to notice on the production floor, including film cling, haze, unwind noise and how the film responds when contacting corners or uneven load surfaces.
For example, pallets containing metal components, fabricated parts or products with uneven edges may create concentrated stress points during wrapping. In these cases, film selection should consider gauge, resin formulation, pre-stretch ratio, machine tension and load geometry together.
Common gauge options include 75, 80 and 90 gauge, approximately equal to 19.05 um, 20.32 um and 22.86 um. The most suitable grade depends on the wrapping equipment, pallet weight and transportation environment.
Benefits
- Blown extrusion structure is suitable for loads where corners, uneven surfaces or protruding parts create higher stress during wrapping.
- Strong film-to-film cling helps maintain stable wrapping layers after stretching.
- Suitable for industrial pallets containing irregular shapes, fabricated parts and products with concentrated edge pressure.
- Available gauge options allow the film grade to be matched with pallet weight, wrapper settings and required containment performance.
- Compatible with automatic and semi-automatic wrappers when pre-stretch, film force and wrapping settings are properly matched.
How Does Blown Machine Stretch Film Perform When Wrapping Irregular or Sharp-Edge Loads?
In production environments, film failure around irregular loads is usually related to the interaction between the film, the pallet shape and the wrapping settings. A sharp edge may create an initial puncture point, while continuous machine tension can cause the damaged area to expand.
Because these situations involve different failure stages, puncture resistance, tear initiation and tear propagation should be evaluated separately. A film that performs well against initial penetration may not always behave the same after a tear has started.
For actual applications, trial wrapping is often the most reliable evaluation method. Checking film break frequency, edge tearing, load movement after wrapping and retained holding force provides a clearer picture than comparing gauge alone.
Blown vs Cast Machine Stretch Film Selection
| Performance Factor | Blown Machine Stretch Film | Cast Machine Stretch Film |
|---|---|---|
| Manufacturing Process | Circular die extrusion with air cooling and controlled winding | Flat die extrusion with chill-roll cooling |
| Film Surface Behavior | Strong cling characteristics, grade dependent | More controlled surface consistency |
| Load Suitability | Often selected for uneven or puncture-prone loads | Often selected for visibility and quieter operation |
| Clarity | Higher haze, lower transparency | Higher clarity and gloss |
| Unwind Noise | More noticeable during operation | Quieter running performance |
TDS / Technical Data Sheet
| Item | Typical Value |
|---|---|
| Product Type | Blown machine stretch film |
| Material | LLDPE |
| Film Structure | Blown extrusion LLDPE |
| Width | 20 in |
| Roll Length | 5000 ft |
| Gauge Options | 75 / 80 / 90 gauge |
| Thickness Range | 19.05 – 22.86 um |
| Core Type | Machine stretch film core |
| Pre-Stretch Range | Confirm according to film grade and wrapper capability |
| Roll Weight | Confirm according to gauge, core specification and packing method |
| Roll Quality Reference | Roll flatness, edge condition and winding consistency |
| Puncture Resistance Evaluation | ASTM D5748 reference and actual application testing |
| Tear Evaluation | Initial tear and tear propagation evaluation |
| Cling Evaluation | Film-to-film cling after stretching |
When Should Blown Machine Stretch Film Be Selected Instead of Clear Cast Machine Stretch Film?
The choice between blown and cast machine stretch film should depend on the packaging challenge rather than only the film thickness. Blown film is often considered when the pallet includes uneven surfaces, protruding sections or higher risk of mechanical stress. Cast film is frequently selected when optical clarity, quiet unwind and consistent film delivery are the primary priorities.
For machine wrapping operations, the correct choice also requires checking pre-stretch capability, film force settings, wrapping speed and overlap. A higher stretch ratio does not automatically create better packaging performance if the film is not matched with the wrapper and load condition.
Applications
- Metal components and fabricated assemblies
- Extruded profiles and products with uneven edges
- Industrial pallets with irregular load shapes
- Mixed-size products requiring stable pallet containment
- Warehouse storage and export transportation wrapping
Machine Trial and Specification Considerations
Before regular production use, trial wrapping on the actual equipment is recommended because the same film grade may perform differently under different pre-stretch systems, tension settings and pallet designs.
During trials, checking film break frequency, edge tearing, load movement and wrapping consistency provides more practical information than comparing gauge alone.
A higher pre-stretch setting does not always deliver better results. If the film grade, machine setting and load condition are not properly matched, excessive stretching may increase break risk or reduce effective containment.
For repeat orders, keeping an approved sample roll and comparing future batches by thickness, roll weight, winding condition and wrapping performance helps maintain consistent packaging results.
FAQ
How Should Blown and Cast Machine Stretch Film Be Compared for Different Loads?
Blown machine stretch film is produced through circular die extrusion and air cooling, while cast machine stretch film uses flat die extrusion and chill-roll cooling. These different structures create differences in clarity, cling, noise, puncture response and stretching behavior.
How Should Gauge Selection Be Matched With Load Weight and Machine Settings?
The suitable gauge depends on pallet weight, load geometry, machine pre-stretch capability and transportation conditions. Common options include 75, 80 and 90 gauge grades.
Can this industrial stretch film be used on automatic pallet wrappers?
Yes. This type of industrial stretch film can be evaluated for automatic and semi-automatic wrapping equipment after confirming roll size, core specification, pre-stretch system and film force settings.
How should pallet stretch wrap performance be verified before bulk purchasing?
Performance should be confirmed through actual machine trials and application testing. Puncture resistance, tear initiation, tear propagation and cling performance should be evaluated separately because they represent different wrapping conditions.