Start with the complete application
Match the machine to the product, sachet and production plan
The finished dose and pack dimensions are only part of the specification. Product behaviour, film web, seal pattern, coding, changeover and accepted-output conditions determine whether the route is practical.
What “small sachet” means in practice
A buyer may mean a low fill weight, narrow finished width, short cut length or a machine with a compact footprint. Those are separate requirements. A low-density powder can need more internal volume than a heavier dose, while a viscous liquid may need extra headspace to keep the horizontal seal clean.
Start with a dimensioned finished-pack drawing, not only a nominal dose. Mark the seal bands, tear notch, print repeat, registration mark and coding zone. The machine supplier can then assess whether the forming route leaves enough clear film for filling, sealing and cutting.
Single lane, multi-lane or stick pack
A single-lane VFFS route is often the clearest starting point where products or formats change frequently. Multi-lane equipment divides a wider web into several packs and can raise total output, but every lane must be filled, sealed, cut and sampled consistently. A stick pack uses a deliberately narrow format and may be better where presentation and dose geometry suit that shape.
The decision should be made against accepted saleable packs per production period, including normal refill, reel change, cleaning and inspection activity. A headline cycle rate does not describe those operating conditions.
Dosing is part of the pack specification
Liquid, paste, powder and granule products require different feed and dosing arrangements. Product temperature, viscosity, bulk density, aeration, particles, dust and flow interruption can alter cut-off and dose behaviour. A representative trial should reproduce the intended product feed, rather than testing only a convenient substitute.
For the smallest packs, minor product carry-over can contaminate a significant proportion of the seal. Nozzle position, cut-off, settling time, dust control and the space between the filling point and jaws therefore matter as much as the nominal dose.
Film, registration and cut control
Compact printed repeats leave little room for drift. Supply the film structure, thickness, reel width, core, winding direction, print repeat and registration-mark drawing. Confirm whether finished packs leave individually, in linked strips or with a specified perforation.
Coding must be positioned inside a controlled print area without obscuring artwork or entering the seal. The coder, trigger and verification method should be included in the line sequence rather than treated as an afterthought.
