Start with the product, not the pouch
The product dictates the packaging. Coffee needs an oil and oxygen barrier, often with a one-way degassing valve. Snacks need moisture and oxygen protection. Pet food needs puncture resistance and a strong seal. Tea needs aroma retention. Before choosing a structure, list the product's sensitivities: oxygen, moisture, light, grease, and aroma. That list determines the material combination and whether you need a high-barrier film or a standard laminate.
Also consider the fill method. Vertical form-fill-seal (VFS) works with rollstock film, while pre-made pouches suit manual or semi-automatic filling. Spout pouches need a fitment that matches the filling equipment. Flat bottom pouches stand on the shelf but require more material. A stand-up pouch offers shelf presence with less material than a flat bottom. The fill method and pack format should be decided together, as they affect the film specification and the pouch design.
Material structures and barrier
Common structures include PET/AL/PE for high barrier, PET/NY/PE for toughness, and kraft paper laminates for a natural look. Mono-material PE and PP recyclable options are available, as are PLA/PBS compostable and degradable films. Each structure has different barrier and sealing properties. For example, aluminium foil (AL) provides an absolute barrier to light, oxygen, and moisture, but it is not recyclable in most streams. Mono-material PE can be recycled where facilities exist, but its barrier is lower, so it suits shorter shelf-life products.
Barrier requirements are usually expressed as WVTR (water vapour transmission rate) and OTR (oxygen transmission rate). Lower values mean better protection. A coffee roaster might need an OTR below 1 cc/m²/day and a WVTR below 0.5 g/m²/day. A dried fruit pack may accept higher values. Ask your supplier for data sheets and test the actual pack, as shelf life depends on the product, fill weight, and storage conditions.
Print methods and cost drivers
Rotogravure printing offers up to 10 colours and is cost-effective at high volumes, typically from 10,000 pouches or 200 kg of film. Digital printing has no plate costs and suits low volumes, from 100 pouches or 10 kg of film, with lead times of 10-15 working days after artwork approval. Rotogravure lead times are 20-25 working days. Flexographic printing sits between the two for certain designs. The choice affects unit cost, minimum order quantity, and lead time.
Other cost drivers include material structure, pouch size, add-ons such as zippers, valves, spouts, tear notches, windows, carry handles, and hang holes, and the number of SKUs. Film width and repeat length affect how efficiently the printer uses the substrate. Consolidating SKUs and standardising sizes can reduce waste and cost. Freight and duties also matter, especially for international shipments. Request a detailed quote that breaks down unit price, MOQ, lead time, and shipping terms.
Filling, sealing, and common mistakes
Filling equipment must match the pouch or film. Pre-made pouches need a filler with the right cup or gripper. Rollstock requires a VFS machine with the correct forming collar and seal jaws. Spout pouches need a fitment inserter or a filler with a spout station. Seal contamination is a frequent issue: product in the seal area causes leaks. Powdered products are especially prone. Use a good filling nozzle and check seal integrity with leak tests.
Other common mistakes include specifying a barrier that is too high (overpaying), too low (spoilage), or incompatible with the filling line (slow speeds, frequent jams). Not accounting for headspace can cause pouches to burst during sealing. Ignoring the direction of the film's sealant layer can lead to weak seals. Always request a sample and run a trial on your equipment before committing to a full production run.
Sustainability rules and options
Sustainability regulations are tightening. The EU's Packaging and Packaging Waste Regulation (PPWR) sets recycling and recycled content targets. Similar rules exist in other regions. Mono-material PE and PP structures are designed for recyclability, while PLA/PBS compostable films meet industrial composting standards. Degradable options exist but may not fit all recycling streams. The right choice depends on your market, shelf life, and local waste infrastructure.
Certifications such as BRC are held by the manufacturing partner, not by Clover Packaging. When a supplier claims a certification, ask for the certificate and check the scope. For recyclable or compostable claims, request test reports or certifications such as OK Compost or How2Recycle labels. Avoid vague terms like 'eco-friendly' unless they are backed by a specific standard. The goal is to make a claim you can defend.
Samples, trials, and next steps
Free stock pouch samples are available; you pay only the courier. Use them to check size, feel, and basic function. For custom structures, request a sample with your intended material and add-ons. Run a trial on your filling line to confirm speed, seal quality, and pack appearance. A trial can reveal issues that a data sheet cannot, such as film stiffness or seal through contamination.
When requesting a quote, provide the product type, fill weight, pouch style, material preference, print method, quantity, and any add-ons. Also state your target shelf life and distribution conditions. That information allows the supplier to recommend a structure and give an accurate price. A clear brief reduces back-and-forth and shortens the lead time. With digital printing, production can start 10-15 working days after artwork approval; rotogravure takes 20-25 working days.