What Is Flow Wrap Packaging? Types, Uses and Benefits

Flow wrap packaging is a high-speed method that wraps a product in a single sheet of flexible film, sealing it into a sealed pillow-shaped pack with one long seal down the back and a seal at each end. It is also called horizontal flow wrapping or horizontal form fill seal (HFFS), and it is the format behind most wrapped chocolate bars, biscuits and individually packed hardware items. The machine that does it is known as a flow wrapper.

What flow wrap packaging actually is

In flow wrap, a continuous roll of printed or plain film is folded over the product as it travels along the line. The film edges are joined to form a tube, then sealed and cut to create one finished pack per product. There is no pre-made bag or box involved, which is why the format is so fast and so economical on material.

The seals define the pack. The long seal running down the length of the pack is either a fin seal (where the two inner faces of the film are pressed together, giving a stronger, more hermetic join) or a lap seal (where the film overlaps, using slightly less material and lying flatter). The two end seals, made by a rotating or box-motion crimping jaw, close each end and cut one pack from the next in a single action.

Common film types

• Polypropylene (BOPP): clear, crisp and cost-effective, widely used for confectionery and bakery.
• Laminates: multi-layer films that add a moisture or oxygen barrier for longer shelf life.
• Paper-based and recyclable films: growing options for brands working towards recyclable or home-compostable packaging.

How a horizontal flow wrapper (HFFS) works

A horizontal flow wrapper carries the product flat and horizontally through the machine, which is what the H in HFFS refers to. The basic sequence is straightforward:

1. Products are fed onto an infeed conveyor, usually by an automatic in-feed chain with flights that space each item evenly. On higher-speed lines this infeed is often handled by robotic infeed automation that loads and orients each product.
2. Film unwinds from a reel and passes through a former, which folds it into a tube around the product.
3. A long sealer (fin or lap) bonds the film edges along the length of the pack.
4. End-seal jaws crimp and cut across the film, finishing one pack and starting the next.

The result is a continuous run of identical, sealed packs with very little manual handling. Throughput depends on the product and machine, but flow wrappers are prized for their speed on long production runs. If you want to match a wrapper to your line speed and product, you can speak to Nexus Australia about the options.

What products suit flow wrap

Flow wrap suits any item with a reasonably consistent shape that benefits from an individual sealed pack. Typical applications include:

• Bakery: biscuits, cookies, bread rolls, muffins and cake bars.
• Confectionery: chocolate bars, lollies and novelty items.
• Nutrition and protein bars: where a tight hermetic seal protects freshness.
• Hardware and industrial parts: fasteners, fittings, brackets and small components, often with a printed card backing.
• Medical and healthcare: syringes, dressings and devices where a clean, sealed barrier matters.

The benefits for manufacturers

For Australian makers weighing up packaging formats, flow wrap offers a strong mix of speed, protection and cost:

• Speed: continuous-motion wrapping handles high volumes on long runs.
• Hermetic seal: a fin seal can create an airtight pack that protects against moisture, oxygen and contamination, extending shelf life.
• Low material cost: using a single film reel rather than pre-made bags keeps packaging spend down.
• Presentation: clear or printed film gives a clean, branded look on shelf.
• Hygiene: minimal manual contact suits food and medical products.

Film and material options

Film choice is where shelf life, sustainability and cost all meet. A simple BOPP film is fine for products sold quickly, while barrier laminates suit items needing months of protection. Many brands are now trialling recyclable mono-material and paper-based films to meet sustainability targets, and most modern flow wrappers can run these with the right settings. The team at Nexus Australia can help you sense-check film compatibility against your product and machine.

Flow wrap vs other formats

Flow wrap is not the only choice, and the right format depends on the product:

• Vertical form fill seal (VFFS) drops loose product (crisps, nuts, granules) into a vertical bag. Flow wrap, by contrast, wraps a discrete solid item horizontally.
• Shrink wrap uses heat to tighten film around a product or multipack, but it does not create the same neat individual sealed pack.
• Cartoning and tray sealing use rigid packaging, which costs more and runs slower than flexible film flow wrap.

For individually wrapped, fast-moving solid products, flow wrap is usually the most efficient and cost-effective option.

Frequently Asked Questions

What is the difference between flow wrap and HFFS?

There is no real difference. HFFS stands for horizontal form fill seal, which is the technical name for the flow wrap process. Flow wrap is simply the everyday term for the same horizontal wrapping method.

Is flow wrap packaging recyclable?

It can be. Traditional laminates are hard to recycle, but recyclable mono-material and paper-based flow wrap films are increasingly available. The right choice depends on your shelf-life needs and the recycling streams your customers can access.

What is the difference between a fin seal and a lap seal?

A fin seal presses the two inner faces of the film together, creating a stronger, more airtight join that suits products needing freshness protection. A lap seal overlaps the film, lies flatter and uses slightly less material, which suits less sensitive products.

What speed can a flow wrapper run at?

It varies with the product, film and machine configuration, so there is no single figure. Flow wrappers are valued for high throughput on consistent, long production runs, and the best way to gauge realistic output is to match a machine to your specific product and line.

Related machines and guides

• Flow wrapping machines
• Robotic infeed automation
• Sachet vs stick pack vs pouch formats
• Cobots vs industrial robots