Sachet Filling

Sachet and pouch machinery

Specifying sachet and pouch filling machinery

A sachet project combines dosing and pack making. Product behaviour, the required pack dimensions, film structure, seal area, print registration and downstream handling all influence whether vertical form-fill-seal or a pre-made pouch route is more appropriate.

Keep the sealing zone clean

The dose must enter the pack without coating the surfaces that need to seal. Thin liquids can splash, viscous products can string and powders can create dust around the jaws. The chute or nozzle, fill timing, headspace and pack support therefore need to be assessed together. A pack that looks acceptable immediately after sealing should also be checked after cooling and normal handling.

Film suitability cannot be confirmed from dimensions alone. Supply the exact laminate or pouch, including printed material where registration is required. Seal temperature, pressure and dwell must be established for that material, and any coding position should be agreed before the artwork and pack layout are finalised.

Define the complete pack and production route

• Product viscosity, particles, temperature, dust or foaming behaviour.
• Minimum, normal and maximum dose.
• Finished sachet or pouch dimensions and required headspace.
• Film or pouch samples, print registration marks and coding area.
• Target output, batch size and changeover frequency.
• Upstream product supply and downstream inspection, conveying or case packing.

For dry products, compare auger and weigh dosing on the powder and granule filling pages. For liquids and pastes, provide the normal operating temperature and a representative sample. Where only final closure is required, a continuous band sealer may be a different route from an integrated sachet machine.