Start with the product, not the pouch
The product decides the structure. Coffee needs an oxygen barrier and a one-way degassing valve to release carbon dioxide without letting oxygen in. Snacks need moisture and grease resistance. Pet food needs puncture resistance and a strong seal. Tea needs aroma retention and often a zipper for reclosure. Buyers who choose a pouch before defining shelf life, fill weight and distribution conditions usually pay for it later in leaks, stale product or overweight freight.
A useful brief states the product, target shelf life, fill weight, storage conditions and retail channel. From there, a supplier can propose a laminate. Common builds include PET/AL/PE for high barrier, PET/NY/PE for toughness and flex crack resistance, and kraft paper laminates for a natural look with moderate barrier. Mono-material PE and PP recyclable structures and PLA/PBS compostable options are also available when the brief calls for them.
Barrier layers and what they block
Barrier is not one property. Oxygen transmission rate matters for coffee, nuts and dried meat. Water vapour transmission rate matters for biscuits, crisps and powdered drinks. Light transmission matters for dairy and oils. Aluminium foil gives the strongest combined barrier. Metallised PET or metallised OPP gives a good middle ground at lower cost. EVOH coextruded films give oxygen barrier in a recyclable mono-material PE structure, though they are sensitive to moisture.
Choose the lowest barrier that meets shelf life. Over-specifying adds cost and can make recycling harder. Under-specifying shortens shelf life and increases returns. A supplier should be able to explain which layer does what in the proposed structure, and why the thickness was chosen. If that explanation is missing, ask for it before approving artwork.
Filling method drives the format
How the pouch is filled affects the format more than most buyers expect. Vertical form fill seal runs rollstock film and suits high-speed snack and coffee lines. Pre-made stand up pouches suit lower volumes and manual or semi-automatic filling. Flat bottom pouches stand on the shelf and hold more weight, which suits pet food and coffee. Spout pouches, including corner spout and STANDCAP, suit liquids, purees and sauces. Side gusset bags suit tea and larger fills.
Rollstock film: best for automated lines and high volume - Stand up pouch: good shelf presence, moderate volumes - Flat bottom pouch: stable, premium look, heavier fills - Spout pouch: liquids and semi-liquids - Side gusset bag: tea, coffee, larger formats
What actually drives unit cost
Four things move the unit price: print method, order quantity, structure complexity and add-ons. Rotogravure printing needs cylinders, so it suits runs from 10,000 pcs or 200 kg and gives the lowest unit cost at volume, with up to 10 colours. Digital printing has no cylinder cost, so it suits runs from 100 pcs for pouches or 10 kg for film, which is useful for test launches and short seasonal runs. Flexographic printing sits between the two for certain jobs.
Add-ons add cost and lead time. A one-way degassing valve, zipper, spout and cap, carry handle, hang hole, tear notch or window each add a process step. Lead time follows the print method: digital runs typically ship 10-15 working days after artwork approval, while rotogravure runs typically take 20-25 working days. Free stock pouch samples are available; the customer pays courier only.
Sustainability rules are changing
Regulation is now part of packaging specification, not a marketing extra. The EU Packaging and Packaging Waste Regulation sets recyclability and recycled content requirements that affect what can be sold into Europe. Mono-material PE and PP structures are easier to recycle than mixed laminates. Compostable PLA/PBS suits specific closed-loop applications but is not a general replacement for recycling. Degradable options exist but their role depends on the waste stream available.
The practical approach is to define the end-of-life pathway first, then choose the structure. If the pouch will be recycled, keep it mono-material and avoid unnecessary barriers. If it will be composted, confirm the certification the manufacturing partner holds and the conditions required. Certifications belong to the factory, not the supplier, so ask which specific standard applies and to which structure.
Mistakes that delay a launch
Most delays come from artwork and specification, not production. Common problems include artwork supplied without dielines, low-resolution logos, missing bleed, and colour targets set in RGB for a print process that uses spot colours. Changing the structure after cylinders are made is expensive. Changing fill weight after pouches are approved can invalidate the seal and barrier assumptions.
A short checklist prevents most of this: confirm the dieline, confirm the fill method, confirm the barrier requirement, confirm the add-ons, confirm the print method against order quantity, and approve a physical sample before the full run. That sequence keeps the project inside the quoted lead time and avoids paying twice for the same job.