If your automated palletizing operation requires concealing the contents of pallets during transit (confidential shipments, export of sensitive goods, pharmaceuticals, or high-value electronics) or needs additional UV protection for pallets that remain in the Caribbean sun for several days, this black machine stretch film from Fortemo is the opaque version with the same mechanical performance as the transparent one: 50 cm wide, 1500 m roll, 90 gauge, multilayer co-extruded LLDPE formulation with 200-300% pre-stretch without tearing. This guide explains how to set up the head and verify pigment quality between batches.
The mechanical application parameters are identical to those of the transparent machine film. The only real operational difference is the visual verification of pigment between batches, which is covered in the first step. If your operation does not require opacity or UV blocking, the clear film provides the same mechanical seal at a lower cost.
Product Specifications
The black machine stretch film is offered in a single standard presentation of 50 cm wide by 1500 m long, with UV-stable pigment integrated into the co-extrusion. The table below lists the complete technical specifications of the only available variant:
| Specification | Value |
|---|---|
| SKU | 857354 |
| Material | Multilayer co-extruded LLDPE + UV-stable black pigment |
| Color | Opaque Black |
| Additional treatment | Integrated UV block |
| Width | 50 cm (20 in) |
| Length per roll | 1500 m (4920 ft) |
| Thickness | 23 µm (90 Gauge) |
| Pre-stretch capability | 200-300% (on motorized carriage) |
| Puncture resistance | High (multilayer structure) |
| Adhesion system | Calibrated differential cling |
| Compatibility | Turntable, rotary arm, mobile robot wrappers |
| Presentation | Individual 1500 m roll |
The sister guide for the transparent machine stretch film applies the same configuration parameters to the clear version, indicated when opacity and UV blocking are not factors and lower cost is a priority.
Step-by-step guide for use
The operating procedure is identical to transparent machine film, with one additional point: visual verification of the pigment when loading each roll and between manufacturing batches. Each wrapper has specific parameters on its panel; the indicated ranges are indicative and should be cross-referenced with your equipment manufacturer's manual.
Roll inspection and pigment verification
Roll inspection follows the same criteria as with transparent film (no dents, no deformations, clean edges), with an additional step: verifying pigment consistency. Unroll 1-2 meters of film and observe it against strong light: the black should appear uniform and completely opaque. If semi-translucent areas or "mottling" appear where the pigment was poorly distributed at the factory, mark the roll as defective and report the batch to the supplier before processing it online — irregular pigment can go unnoticed in night operations and compromise the actual confidentiality of the shipment —.
Head cleaning and mounting
Clean the head rollers with a dry cloth and isopropyl alcohol before loading the roll. In operations that alternate between transparent and black film, this cleaning is especially important: pigment residue from the previous black film can deposit on the rollers and partially "dirty" the next transparent batch, in addition to affecting pre-stretch. Place the roll on the dispenser with the inner (cling) side facing the pallet — visual verification of orientation is more difficult with black, so it is advisable to mark the correct direction on the dispenser with adhesive tape as a visible reference —.
Pre-stretch and pattern configuration
Pre-stretch parameters are identical to transparent film: 200-300% depending on the type of load. Stable loads 250-300%, mixed loads 200-250%, fragile loads 150-200%. The mechanical performance of black is equivalent to transparent — it does not require special adjustments for opacity —. Configure number of wraps at base, body, and top according to the operation.
For operations shipping valuable goods abroad with real risk of theft in transit, consider interlacing two colors: 80% of the pallet with black film (seal plus opacity) and a central ring with two wraps of transparent film of the same gauge. The transparent strip acts as a visual inspection seal: if it arrives cut or replaced at the destination, there is immediate evidence of tampering during transit. It's a passive security layer that adds no significant cost and provides visual traceability.
Cycle start and uniformity verification
Start the cycle and observe the first three wrapped pallets. The texture should be uniform and the applied film color completely opaque. If you notice areas that reveal the pallet's contents from certain angles, it's a sign of irregular pigment in the loaded roll (not in the head configuration). Change the roll and verify the entire batch. For operational auditing, record the manufacturing batch of each loaded roll to correlate incidents with production quality.
Maintenance between changes and batch traceability
Mechanical maintenance between changes is the same as with transparent film (roller cleaning, spindle verification). Additionally for operations with black film: keep a simple record of which rolls were used on which shift and which pallets they covered. If a customer reports a pallet with irregular pigment at the destination, this record allows identifying the responsible manufacturing batch and preventing the rest of the batch from reaching other customers.
Do not mix rolls from different manufacturing batches in the same night operation without verifying uniform pigment between them. Although the formulation may be identical in spec, different batches may have minor visual color variations (more matte, brighter, slightly darker) that become noticeable when pallets from the same shipment arrive at the customer with an uneven appearance. For critical shipments where appearance matters (premium export, retail), use rolls from the same batch or segment the operation by roll.
Does opacity justify the extra cost in your automated line?
In an automated line, the extra cost of black film versus transparent film accumulates quickly due to the high volume processed (130-180 pallets per roll). If your operation processes more than 200 pallets daily, it is advisable to carefully audit which ones truly require opacity and which do not — operations that wrap everything in black by default often have 60-70% of pallets that do not need opacity and could use transparent film —. Ask the assistant with your volume and load type, and we will guide you to the optimal combination.
Complementary Products
To complement black machine film in industrial palletizing operations with opacity or UV protection requirements, the following products cover the most common adjacent needs:
The transparent machine stretch film is the clear version with the same mechanical performance, suitable when opacity and UV protection are not factors and lower cost per pallet is prioritized. Polypropylene (PP) strapping coils complement black film in heavy export operations: two wraps of strapping over the film secure the pallet with additional fastening for long road transits. The open-mouth big bag palletized and wrapped with black machine film plus strapping is the usual combination for exporting aggregates sensitive to visual lot inspection. Plastic corner protectors protect the four corners of the pallet from cutting by strapping, especially when combining film and strapping on loads with sharp edges.
Maintenance and Care
Black machine film rolls require the same storage care as transparent ones: vertical position, cool interior, on a flat surface, away from direct sunlight. Direct UV radiation on stored rolls does not degrade the applied film (which is protected by its own UV additive) but does degrade the cling of the inner surface and can marginally affect pigment consistency in the exposed area. In warehouses with metal roofs exposed to the Caribbean sun, it is advisable to store rolls in a specific area protected from direct radiation.
For operations that maintain lot records (recommended for export shipments), keep the manufacturing sticker from each roll along with the date of use. This traceability allows identifying which pallets correspond to which supplier lot in case of issues with pigment quality or mechanical performance. This practice adds 30 seconds per roll change and provides audit capability that pays for itself with the first incident in critical operations.
Frequently Asked Questions (FAQ)
Does it have the same mechanical performance as transparent film?
Yes. The coextruded multilayer LLDPE formulation is identical in structure and properties: the UV-stable black pigment is integrated into the coextrusion without affecting elongation, puncture resistance, or pre-stretch capability. The head configuration parameters (200-300% pre-stretch, wraps at base/body/top) are the same. The only noticeable operational difference is the visual verification of pigment between batches, not the mechanical operation itself.
Is it compatible with all wrappers that use transparent film?
Yes, with no known exceptions for standard wrappers (turntable, rotary arm, mobile robots). If your operation alternates between transparent and black film, it is advisable to clean the head rollers between changes to avoid residual pigment transfer to the next transparent batch. Wrappers with optical sensors for detecting the start or end of a roll may require sensitivity adjustment for opaque film; consult your equipment manual.
When is the added cost of black film truly worth it compared to transparent film?
The rule of thumb is: if less than 30% of your pallets have a specific opacity or UV protection requirement, it is inefficient to wrap everything in black by default. Identify the SKUs or destinations that justify black film (confidential products, export to destinations with questionable handling, photosensitive goods, pallets with prolonged outdoor storage) and reserve the black film line for those. For the rest, transparent film provides the same level of mechanical closure at a lower cost.