Flow Wrap or VFFS? Decide by How the Product Enters the Pack

Short answer: look at the product, not the finished bag

Start with flow wrap for shape-stable items that need controlled placement; start with VFFS for measured portions that can enter a vertical film tube. Similar pillow packs can come from either route. Treat uncertain handling as a trial question. This catalog covers vertical packaging, not horizontal flow wrappers; this is a public-source comparison, not our test.

• How a VFFS machine works and what to ask
• VFFS or premade pouches: where to start
• Choose multihead weighing or auger dosing
• Check fill weight and bulk density before sizing the bag
• Compare quotation scope and evidence
• Review nitrogen-flushing scope and measurements
• Define accepted output for the comparison
• Review damage at product transfer points

Why the finished bag does not decide the route

A flow wrapper and a VFFS machine both start from a roll of film, and both can end with the same kind of pillow pack: one seal along the length and one at each end. Supplier guides for both routes say as much. A retail bag on the shelf rarely tells you which machine made it, so the bag is a poor place to start the decision.

The difference is the moment the product meets the film. On a flow wrapper the product lies on a horizontal conveyor, usually spaced one item or one group at a time, and the film is folded around it as it moves. The machine seals the long edge, then crimps and cuts the ends. On a VFFS machine the film is pulled down around a forming tube. A weigher or volumetric filler above the tube releases one portion, which falls into the bag by gravity before the top seal closes the bag and forms the bottom of the next one.

So the first question is physical. Can your product be placed and carried, item by item, in a fixed position? Or is it a quantity that has to be measured and dropped? The rest of this guide follows from that answer.

A four-question decision tree

Questions 2 and 3 give a candidate route, and every candidate then goes through question 4 before it becomes a recommendation. Write the answers down for every SKU, because one product family can split across both routes.

Question 1: what is one pack? If it is one item, or a fixed stack or tray of items, go to question 2. If it is a weight or volume of loose product, go to question 3.

Question 2: does the item keep its shape on a conveyor? If yes, flow wrap is the candidate, and it becomes the strong candidate when the item also has to stay the right way up in the pack. A small, robust item with no orientation need can sometimes be counted or weighed into a bag instead; treat that as a grey-zone case below. If the item is soft, tips over or will not hold a position, ask whether a tray or carrier solves that, and run a handling trial before choosing a machine.

Question 3: can the portion fall into a film tube without breaking, smearing or putting dust into the seal area? If yes, a VFFS machine is the candidate, and the dosing method is the next choice. If the product breaks or sticks, the vertical route may still work, but feeding and drop height become the first things to test.

Question 4, for every candidate: does the finished pack have to stand on the shelf, reclose or carry a spout? If yes, compare the candidate with premade pouches before going further, because those features usually decide the packaging material before they decide the machine. If no, keep the candidate and plan a trial with your own product.

If different SKUs reach different candidates, you have two packaging jobs. Price them as two jobs instead of asking one machine to cover both.

Products that should not go on a VFFS machine

A vertical bagger is built around a drop. That makes it a poor match for products whose value depends on where they sit in the pack or how they look when the pack is opened. Supplier guidance on both sides of the market names the same groups.

Single bars and baked items sold one per pack belong here. So do stacked biscuits or crackers that must arrive in order, items placed on a tray or card before wrapping, and multipacks in which a set number of items lie side by side. Add anything that tips, wedges or turns over in a vertical tube, and any item that breaks or loses its shape when it lands.

For these products, a standard VFFS machine that relies on a free drop should not be assumed to hold each item in position. A vertical proposal has to show how it orients each item, controls its fall and keeps a piece from landing across the seal; the horizontal route avoids the free fall, though it still has to space and present each item on its infeed. If a supplier offers a vertical machine for a single shaped item, ask how orientation is held and what happens when an item arrives turned the wrong way. Our reading is that this answer should come from a trial with your own items, not from a drawing.

Products that should not go on a flow wrapper

The reverse case is just as clear. Supplier guides for flow wrapping state that small granular products do not suit the method and that loose product cannot be placed accurately on a horizontal conveyor. A flow wrapper needs something it can space, push and wrap.

That rules out powders, granules, small pieces sold by weight, mixes of several components, frozen pieces that arrive as a stream, and sauces or liquids. These are the products a VFFS line is designed around. The bag is formed around a tube, and the portion comes from a separate measuring device: a combination weigher for pieces, an auger for powders, a cup or volumetric filler for free-flowing granules, or a piston or pump filler for sauces in a suitable format.

Choosing the vertical route does not settle the dosing method. That is a separate choice, and the fill weight has to be checked on the complete system: dosing unit, bagger and your product together. The linked dosing and bulk-density guides above cover these next decisions: select the measuring method, then check the portion volume before settling bag size.

Grey-zone products: test both routes on the same lot

When a product could go either way, compare both routes on product from one production lot, packed to the same target and judged by the same rule, and split wrapped-then-bagged products into two packaging steps. Three patterns come up often.

Size can change the route. A full-size bar is a flow-wrap item, while the same recipe cut into bite-size pieces and sold by weight is a VFFS product. Treat each sellable size as its own SKU in the decision tree.

Wrapped items sold in a bag are a second pattern. Individually wrapped sweets are often wrapped on a horizontal machine first and then counted or weighed into a larger bag. Supplier material describes this sequence directly: wrapped candies conveyed to a multihead weigher or counter, then on to a bagging machine. The project then has two packaging steps, and the second is a VFFS or premade-pouch question in which the wrapped piece is the product.

Fragile pieces that arrive as a stream are the third. Crisps or delicate biscuits may suit the vertical route if breakage stays inside a limit you have agreed in advance. Define the limit before the trial, record it at each transfer point, and compare against the horizontal option only when you have a fair sample from both.

A short demonstration with hand-picked pieces says little about a full shift, so ask for the trial to use ordinary production product, including the awkward pieces.

Names that blur the comparison: HFFS, flow wrapper, vertical flow wrapper

Quotations and supplier pages do not use these names consistently. Some suppliers say HFFS when they mean a flow wrapper. Others use HFFS for a horizontal pouch machine that forms a pouch from roll film, fills it through an open top and may add a zipper or spout. At least one supplier calls a VFFS machine a vertical flow wrapper, and a single page can use HFFS in both senses.

A machine name in a quotation therefore tells you less than it seems to. Ask three questions instead. How does the product enter the package: lying on a conveyor, dropped through a tube or filled into an open pouch? Is the package formed around the product, or formed first and filled afterwards? Which seals does the finished pack have, and which of them are made after the product is inside? The answers put the machine in one row of the comparison table above, whatever it is called.

The same care applies to the plain label FFS, which covers horizontal and vertical machines alike. If a quotation uses only that label, ask which orientation is meant.

What speed, floor-space and cost claims can and cannot settle

Public supplier pages disagree on speed. Several say horizontal machines are faster. Another says speed depends on the product, not on the orientation of the machine. Each statement may hold for the products its author had in mind, which is why a headline rate cannot choose the route. A flow-wrapper rate counts wrapped packs that usually hold one item or one group, while a VFFS rate counts bags of a set weight, so the two figures describe different jobs.

Floor space is described more consistently. Horizontal flow wrappers are usually said to need a longer straight run of floor, and vertical machines are described as more compact on the floor. A vertical line stacks the weigher or filler above the bagger, though, so check ceiling height, platform access and how product is lifted to the top. Ask each supplier for a layout drawing that shows your product infeed and discharge.

Cost claims follow the same pattern. Pages that call one route cheaper rarely name the product, the configuration or the scope. Compare quotations on the same number of accepted packs, and list film, changeovers, feeding equipment and operator tasks for each route. Use the quotation-scope link in the route decision above to build that comparison record.

Define the product and trial scope before sending samples

Define the product shape, what one pack holds, accepted output and pack style before arranging a comparison. The enquiry table collects those inputs. Confirm sample arrangements, quantity and any costs before dispatch; do not treat a request for information as an agreed test booking.

Product shape and dimensions: for single items, the length, width and height of the smallest and largest piece; for loose product, the range of piece sizes or a description of the powder. Loose or single: whether one pack holds one item, a fixed group or a measured portion, plus the target weight or count. Target speed: the accepted packs per minute or per shift you need, with the number of SKUs and changeovers in a normal week. Pack style: a sample or drawing of the pack you sell or plan to sell, including any stand-up, reclose or display requirement.

With that information, the team can review whether the product fits the vertical, multi-lane stick, sachet or premade-pouch equipment in this catalog and what a sample test should check. If the product needs a flow wrapper, that equipment is outside this catalog, and a vertical machine should not be stretched to fit the job.

How this comparison was compiled

This comparison was compiled from public manufacturer and packaging-service documentation, alongside this site’s published vertical packaging material. The source review was updated on 8 October 2026. Public horizontal-wrapper guides support the roll-film, item-infeed and pillow-pack descriptions; public vertical-bagger and dosing documents support the separate forming and portioning steps. Supplier terminology pages support checking the actual filling sequence instead of relying on an HFFS label. The grey-zone decision tree is our selection advice, not a reported equipment test.

Exact supplier URLs, access dates and claim mappings are retained in the editorial evidence record. This commercial page does not link competing equipment suppliers. No supplier speed, price, maintenance cost, payback or footprint figure is transferred to this catalog. Published category descriptions do not establish that a particular product, film or supplied configuration has passed a trial. Use the same lot, package target and agreed criteria when asking for comparative evidence.