The correct question: not which machine is better.
These two technologies solve different problems. Vertical form-fill-seal (VFFS) machines make bags from a film roll as they fill — the lowest cost per bag. Pre-made pouch packaging machines take finished pouches, open them, fill and seal them — the highest bag presentation quality.
The choice depends on three factors: volume, your product's shelf value, and your film strategy. Let's compare them directly.
Comparison table
| Criteria | Vertical Form-Fill-Seal | Pre-formed bag machine (Doypack) |
|---|---|---|
| Normal speed | 40-120 bags/min | 25-60 bags/min |
| Film cost per bag | low — film roll | Higher — printed bag |
| Bag shape | pillow, back seam, gusset | doypack, stand-up bag, zipper, valve, spout |
| Shelf display | simple | Tall — a stand with a large printed face. |
| Change size | Change bag filter, 30-60 minutes | Change the bag set, usually faster. |
| Complexity of operations | Simple — one roll to keep | Lower — the bag has already formed |
| Suitable for | High volume, medium-value product | Premium product, consumer brand, large size |
The speed figures are typical industry ranges; actual speeds depend on the product, fill weight, and film.
When VFFS wins
High volume with moderate margins. 200 g of beans, 1 kg of sugar, 80 g of snacks, 50 g of spices — products sold in tens of thousands of bags a month. The much lower film-roll cost per bag makes VFFS the best cost-saving solution at scale.
One or two stable formats. If 80% your sales come from two bag sizes, the VFFS runs with minimal changeovers. For powder and granular products, refer to Automatic powder packaging machine for the filler configuration.
Limited floor space. A single-lane VFFS machine only uses a small floor area—tall, not wide.
When does a pre-formed bag win?
Premium products on the supermarket shelf. Stand-up pouches with large printed faces, resealable zippers, and one-way valves (for coffee) sell products before customers even read them. For categories like specialty coffee, premium soups, or baby food, display wins cost.
Large or heavy bag size. 1–5 kg bags with hand-held gripping are easier to handle using thick, pre-formed bags than thin film rolls.
Many SKUs, with modest returns on each. Changing pre-made bags is faster than changing VFFS forming sets — a line with 10 flavors and 4 sizes is often more efficient on a pre-made bag machine.
Strict weight control on large bags. Filling 2 kg bags with a multihead weigher on a pre-formed bag machine delivers a combination of accuracy and speed that VFFS struggles to achieve at that size.
Film Costs: A Structural Comparison
Cost structure for 10,000 bags per month (illustrative structure, not actual currency prices):
| Item | Vertical Form Fill Seal | Pre-formed bag |
|---|---|---|
| Materials | long film roll (km) | Printed bag |
| Price of material unit | lowest per bag | 2-4 times higher per bag |
| Remains | Roll end + conversion | Defective molded bag (low) |
| Stocks to be maintained | Large universal roll | One design per SKU |
General rule: at high volumes, the difference in film cost per bag wins out. At low volumes with a high selling price per unit, the premium for pre-formed bags is recouped by the shelf price.
Results in 4 questions
- How many bags per month for your main product? (Under 30,000 and premium → lean toward pre-formed bags; over 100,000 → VFFS almost guaranteed.)
- Does your product require a resealable (zip) bag or a valve? (Yes → pre-formed bag; VFFS can also do it but it's more complex.)
- Does your market aggressively compare prices per kg on the shelf? (Yes → VFFS, control film costs.)
- Does your plan include 10+ SKUs over 2 years? (Yes → pre-formed bag machine with quick changeover.)
Many large manufacturers eventually have both: VFFS for contract volumes and pre-formed bags for their own brands. For the first machine, choose the technology that matches the current 70% sales—not the dream 30%.
Frequently Asked Questions (FAQ)
Can VFFS make stand-up bags (doypacks)?
J: It's possible with a custom former and thick film, but the results and neatness of the bag pale in comparison to pre-formed bag machines designed for doypacks. If doypacks are part of your brand strategy, pre-formed bag machines are the right choice.
Which is easier for SMEs to handle?
J: Pre-formed bag machines are easier to learn — the bags are already formed, so there's no film-forming adjustment. VFFS requires film and sealing adjustments that take one to two weeks to learn.
Do both use the same filler?
J: Yes — an auger for powder, a cup dispenser for granules, and a multi-head scale for irregular items. Fillers are chosen by product, not by machine type.
How about coffee with a one-way valve?
J: Bean-coffee and ground coffee in valve bags are almost always packed using pre-formed bag machines — the valve must be attached to the finished bag before filling. See sack of rice for the shape of the bag.
Related pages
Automatic powder packaging machine | Automatic spice packaging machine | Doy bag (standing bag) | How to choose a packing machine for an SME
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