Stick Pack vs Sachet: Which Format to Use

Quick specs for your brief

A stick is a narrow tube with a longitudinal seal and two end seals; a four-side-seal sachet has a wider flat presentation. Compare both with the same serving, usable volume, opening action and film specification so the chosen format fits its filling and handling task.

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What is the difference between a stick pack and a sachet?

A stick pack is a narrow, elongated single portion, usually formed with a longitudinal seal and two end seals; sachet is a broader commercial term that covers narrow packs as well as wider rectangular pouches, some of them sealed on all four sides. The names overlap, so a purchase specification should describe the finished drawing, seal arrangement and opening instead of relying on a product name. Two suppliers can use the same name for packages that need different forming parts and sealing tools.

Begin with the moment of use. A coffee mix may be poured through a bottle opening, a gel may be squeezed directly from its package, and a seasoning may be scattered across food. Each action creates a different requirement for opening width, stiffness and controlled emptying. Make a filled sample and let a user open it before approving the artwork. An attractive empty mock-up cannot show whether powder bridges at the opening or whether a viscous product is difficult to squeeze out.

Further reading: Packaging World: stick packaging experience and consumer use

Which format suits your product: stick pack or sachet?

Compare how your product enters and leaves each candidate pack. A free-flowing powder may pass through a narrow tube, while a cohesive blend may need more room or a longer settling interval. Coffee, collagen and protein can differ on both points. Identify the filling method and test the usable opening with your material before choosing a finished shape. The equipment category alone does not settle the package design.

For an energy gel, examine viscosity at the intended filling temperature and the tendency to leave a tail after dosing. A wider sachet may change the filling geometry, but it does not automatically solve dripping or contamination at the seal. The pump, nozzle and filling sequence still need to match the product. Supply a representative formulation, the minimum and maximum dose, and any particles or temperature restrictions when comparing formats. Ask for observations from a product trial instead of choosing a package by appearance.

Related reading: Energy Gel Stick Pack Machine

Define the seals before comparing usable space

Usable space is set by the seals, not by the outer rectangle. A pack's external width and length include longitudinal seals, end seals, tear features and cutting allowances, none of which hold product. A slim stick pack and a wider sachet with the same external area therefore need not have the same usable volume. Different machine platforms may form the longitudinal seal or close the sides differently, which also changes the artwork layout and material requirements.

Request a drawing showing the perimeter, seal bands, opening feature and print orientation. Mark dimensions fixed by your customer and those you can change. A retail carton might limit overall length while leaving some freedom in width. The equipment team can use that information to propose alternatives for testing. Approve the seal construction as well as width and length before ordering printed film.

Further reading: Check usable volume inside the seal bands

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Choose the filling system with the package

Pick the filler and the package together, because the dose has to enter the available opening while the sealing area stays clear. Powder configurations may use auger dosing, while liquid and gel configurations need a suitable pump and nozzle arrangement. A geometry that works well for a small free-flowing dose may become unsuitable when the same product range adds a larger serving or a different formulation, so plan for the whole range rather than the launch product alone.

Consider how material reaches the filler as well. Hopper replenishment, powder settling and liquid supply can influence consistency during a longer production run. Ask the supplier to explain which parts change for each intended material and pack size. A touchscreen recipe can store settings, but it cannot replace an incompatible forming tube, auger or nozzle. Record the proposed change parts in the quotation so a format you like does not bring an unexpected tooling cost later.

Further reading: Compare dosing routes before choosing forming tools

Stick pack machine vs sachet machine

On the equipment side, the difference is how each lane forms and seals the pack. A stick pack machine folds each strip of film around a forming tube, closes it with a longitudinal back (fin) seal and then makes the two end seals, so the finished pack is a slim tube. A four-side-seal sachet machine makes a flat pack sealed along all four edges, which takes more width per lane. Both are multi-lane form-fill-seal machines fed from roll film, and in both the dosing system follows the product rather than the format: an auger for powder, a volumetric cup or vibratory feeder for granules, and a pump and nozzle for liquids.

In our reference configurations the two formats share more hardware than the names suggest. The granule and liquid machines can be built for back-seal sticks or four-side-seal sachets, with different forming, sealing and cutting parts, while the powder reference machine makes back-seal sticks. Width per lane is where the formats separate: back-seal sticks run about 15–30 mm on the powder machine and about 20–60 mm on the granule machine, and four-side-seal sachets about 30–80 mm per lane. A film reel has a maximum width, so a wider pack leaves room for fewer lanes; compare output per cycle at your actual pack width rather than at the highest lane count either supplier advertises.

Changeover, floor space and price follow from the configuration rather than the format name. Moving one machine between a stick and a sachet means fitting different forming, sealing and cutting parts, so treat it as a planned format change instead of a recipe change and ask how long it takes to get back to accepted packs. Footprint depends on lane count, dosing system, hopper and options, so ask for the layout drawing of each configuration you are comparing. For price, have both suppliers quote the same pack drawing, product, output and supply scope; the price guide lists the cost drivers to compare.

Related reading: Multi-Lane Stick Packaging Machines Compared; Stick Pack Machine Price: Budget & Quote Guide

Further reading: Powder reference: dosing, fill and width conditions; Granule reference: stick dose and separate format ranges; Liquid reference: stick versus four-side sachet volume

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Do stick packs use less film than sachets?

Sometimes, but there is no fixed saving percentage to plan around. A stick pack can be a material-efficient format for some applications; the real answer comes from comparing the actual film structures, seal allowances, roll layout and accepted package output. A smaller package made with a different structure is not a like-for-like comparison with a larger one. Material lost during setup, roll changes and rejected production also affects consumption per saleable unit.

For a practical comparison, ask the film and machine teams to review both approved drawings. Record the material used during a representative run and the number of accepted packs produced from it. Keep startup waste separate from steady operation so that short and long batches can be compared fairly. That record is more useful than a general marketing claim because it reflects your dose, artwork, film and production schedule. It also shows whether a saving depends on unusually long uninterrupted runs.

Further reading: Compare film-width and seal-allowance inputs

Evaluate opening, printing and secondary packaging

The opening should suit the intended use without compromising the rest of the package. Compare the tear direction, notch position and the amount of product that remains after emptying. Printed instructions should remain readable around seals and folds. Where a batch or date code is required, reserve a suitable area and confirm that the proposed coder can print there without interfering with the cut or sealing process.

What happens after the machine matters as much as the pouch. Narrow sticks may need counting and orientation before entering cartons, while wider sachets may stack or feed differently. Test the actual carton or shipping arrangement with filled packs, including any leaflet or divider. If packing will be manual, have the intended team handle a representative quantity. A format that looks efficient at the machine discharge can create extra work at the packing table if packs are difficult to separate, count or arrange.

Run a side-by-side stick pack vs sachet trial

Run both candidate formats with the same product batch and a clearly identified film for each. Review filling consistency, visible seal contamination, opening behavior and handling after the packs have rested. Define any integrity checks with the people responsible for your product and packaging quality; no single test result establishes suitability for every formulation and distribution route.

Photograph the approved samples next to their drawings and retain examples for later comparison. Record machine settings, any adjustments required, rejected packs and the reason for each rejection. If one candidate runs faster but produces more difficult-to-handle packs, describe the tradeoff. Choose from accepted output and user experience together. A short demonstration may help narrow the options, but production acceptance should use the agreed machine configuration and a representative quantity of your material.

Further reading: Packaging Digest: a packer’s experience testing film and machinery together; Plan the same-product format trial

Record the format you choose

Keep the product description, serving size, approved drawing, film grade and opening details together. Add required output and the way packs will be counted and boxed. List launch sizes separately from possible future sizes. For each later size, ask whether the machine needs settings changes, extra parts or a different configuration, and keep that answer with the quotation.

If you are still choosing a format, send both candidate drawings with the brief. We can review them against the powder, liquid or granule equipment before arranging a trial. Retain the approved filled samples alongside the drawings and record why you chose one format. Your film supplier and production team can then check later artwork, tooling or recipe changes against the same decision.

Calculate pack volume, film use and accepted output

For a powder serving, product volume V = dose mass m / measured bulk density ρ. With m in g and ρ in g/ml, V is in ml. For a tube with effective cavity lay-flat width W in mm, the ideal circular area is A_max = W²/π in mm², and the filled-length lower bound is 1,000V/A_max. Obtain W from the forming drawing, excluding back-seal material. Compare that bound with filled samples to establish the actual cavity shape, both end seals and clean closing space.

Compare film from the approved developed drawings. Area per pack = total developed film width × cut pitch, using the combined width of both faces for a sachet. Use the same area units and film basis weight for both formats. For purchased web width B and pitch p in meters, basis weight b in g/m², N active lanes and accepted fraction y, consumption is B × p × b / (N × y) kg per 1,000 accepted packs. Outer trim is already counted when B includes it; add separately measured setup consumption on the same accepted-pack basis.

Nominal positions per minute = active lanes × cycles per minute. The four-lane powder reference combines 30–40 cycles/min with four lanes to give 120–160 nominal sticks/min. For format comparisons, count accepted packs over the same elapsed trial period, including the agreed stops and restarts. If a combined effectiveness factor already includes rejects, apply it once. This keeps geometry, film use and useful production on a consistent comparison basis.

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