Quick Answer: Polyethylene sleeve film is a continuous tube of folded film supplied on a roll — open at both ends, it is placed over or around a product for protection, bundling, or as the primary packaging before end sealing. It is more material-efficient than bags for long or irregularly shaped items and can be cut to any length on a production line. Standard widths range from 50mm to 1,500mm; thickness from 20 to 200 microns depending on the application.
Polyethylene sleeve film is one of the most flexible and material-efficient formats in the flexible packaging family — yet it is significantly less well-known than bags, envelopes, or stretch film. For businesses packaging elongated, cylindrical, or irregularly shaped products, it often represents the most cost-effective and operationally practical solution available.
This post explains what sleeve film is, how it differs from other film formats, and the wide range of applications where it outperforms bags and cut film.
What Is Polyethylene Sleeve Film?
Sleeve film — also called lay-flat tubing or polyethylene tubing — is a continuous tube of polyethylene film, collapsed flat and wound onto a roll. Unlike a bag, it has no base seal — it is open at both ends. To use it, a length is cut from the roll, placed over or around the product, and then sealed at each end by heat sealing, tying, or clipping, depending on the application.
The continuous roll format means the length can be customised to any product dimension without changing the film specification. This makes sleeve film far more versatile than pre-formed bags for products that vary in length or are produced in non-standard dimensions. RB Plast produces polyethylene sleeve film at its Kocherinovo facility in widths from 50mm to 1,500mm and thicknesses from 20 to 200 microns.
Key Applications for Sleeve Film
| Application | Typical Width | Typical Thickness | Closure Method |
| Furniture and mattress protection | 600–1500 mm | 40–80 microns | Heat sealed or tied |
| Timber, profiles, long products | 100–400 mm | 50–100 microns | Tied or clipped |
| Agricultural produce (bundles) | 150–300 mm | 30–60 microns | Tied or stapled |
| Component protection (industrial) | 50–200 mm | 30–80 microns | Heat sealed |
| Food portioning / retail packs | 100–300 mm | 20–40 microns | Heat sealed |
| Greenhouse / agricultural cover | Up to 1500 mm | 100–200 microns | Overlapped / weighted |
Table 12: Polyethylene sleeve film specifications by application.
Sleeve Film vs Bags: When Sleeving Wins
Bags are efficient for products with predictable, standardised dimensions — the product fits into a pre-formed bag of a fixed size. Sleeve film is more efficient when: products vary in length and a single bag size cannot accommodate all variants; products are very long or large and pre-formed bags of that dimension are impractical to handle; the production process benefits from a continuous-feed film format rather than individual bag loading; or material efficiency is a priority and the open-ended format eliminates excess film at the base.
For a furniture manufacturer covering sofas and mattresses before shipment, sleeve film pulled from a large roll and heat-sealed at each end is far faster and less wasteful than attempting to use individual bags. For an agricultural producer bundling leeks or asparagus, a short length of sleeve film secured with a rubber band or staple is more efficient than a bag.
Printing on Sleeve Film
Sleeve film can be flexographically printed before conversion, with print applied to the outer surface of the film on the roll. For products using sleeve film as primary retail packaging — food items, consumer goods, craft products — printed sleeve film communicates brand, product information, and regulatory content at no operational cost once the artwork has been set up.
RB Plast offers flexographic printing up to 2 colours on sleeve film. Printed sleeve film is particularly cost-effective for food producers who portion and package multiple units from a single printed roll, since the per-unit print cost falls significantly with volume.
Recycling and Material Efficiency
Polyethylene sleeve film is one of the most material-efficient packaging formats available: because it is cut to length at point of use, there is almost no trim waste from the film itself. Compare this to pre-formed bags, where the base seal and the excess at the top of the bag represent film that adds cost but contributes nothing to protection.
Like all polyethylene films, sleeve film is technically recyclable through clean PE film collection schemes. The open-ended format also makes it easier to remove from products for recycling, compared to sealed bags.
Frequently Asked Questions
Q: What is the difference between sleeve film and a bag?
A: A bag has a sealed base — it is closed at one end. Sleeve film is a continuous tube open at both ends, cut to any length from a roll. Bags are more convenient for pre-packing standardised items; sleeve film is more efficient and versatile for items that vary in length or for high-speed production line applications.
Q: What widths does RB Plast produce sleeve film in?
A: RB Plast produces polyethylene sleeve film in widths from 50mm to 1,500mm. Custom widths are available. Contact sales@rbplast.bg with your product dimensions and required specification for a quote.
Q: Can sleeve film be used as primary food packaging?
A: Yes. Polyethylene sleeve film is food-safe and can be used as primary food packaging when produced from food-grade LDPE and sealed appropriately after filling. It is used for portioning fresh produce, bakery items, cheese, and other food products.
Q: Can sleeve film be custom printed?
A: Yes. RB Plast offers flexographic printing up to 2 colours on sleeve film rolls. Contact sales@rbplast.bg to discuss print specifications, minimum order quantities, and lead times.
To discuss sleeve film specifications and printing options, contact RB Plast at sales@rbplast.bg or +359 887 584 300.
