{"id":83622,"date":"2026-10-22T11:31:17","date_gmt":"2026-10-22T03:31:17","guid":{"rendered":"https:\/\/lintyco.de\/sachet-abfuellanlage-flussigkeiten-pasten\/"},"modified":"2026-10-22T11:31:17","modified_gmt":"2026-10-22T03:31:17","slug":"sachet-abfuellanlage-flussigkeiten-pasten","status":"publish","type":"post","link":"https:\/\/lintyco.de\/en\/sachet-abfuellanlage-flussigkeiten-pasten\/","title":{"rendered":"Sachet Filling System for Liquids and Pastes: Pump Dosing with \u00b10.5 %"},"content":{"rendered":"

Liquids are the most challenging application for sachets<\/h2>\n

Powder falls, granules trickle\u2014but liquids and pastes don\u2019t do any of this on their own. They must be conveyed, precisely portioned, and placed into the pouch without spilling a drop, and they leave behind in the seal what doesn\u2019t belong there. The sachet filling line for liquids and pastes is therefore more than just a sachet machine with a different dosing unit: product feeding, pump technology, and cleanability define the line. The machine base is the same as in the Packaging Machine<\/a> described\u2014this article focuses on aspects specific to liquids and pastes.<\/p>\n

Overview of System Components<\/h2>\n

A liquid sachet production line consists of five sections:<\/p>\n

    \n
  1. Product Feeding:<\/strong> Storage tanks with a capacity of 30 to 200 liters; equipped with an agitator for products that settle; double-walled and heated for pastes that need to be kept warm (chocolate, caramel).<\/li>\n
  2. Conveyor unit:<\/strong> Product pump or pressure tank that conveys the product from the container to the dosing point\u2014parts in contact with the product are made of stainless steel: SS316 for aggressive media and SS304 for standard food products.<\/li>\n
  3. Dosing station:<\/strong> The metering pump is located directly above the filling tube and dispenses the batch in a metered quantity into the open plastic tube.<\/li>\n
  4. Sealing and Separation Station:<\/strong> Longitudinal and transverse seams, as with any sachet machine\u2014with the difference that product residue in the seam is the main source of defects here (see the article on Sealing Technology for Sachets<\/a>).<\/li>\n
  5. Derivation and Verification:<\/strong> Conveyor belt for collection or direct transfer to the reweighing station and case packer.<\/li>\n<\/ol>\n

    A Comparison of Pump Types<\/h2>\n\n\n\n\n\n\n\n\n
    Pump Type<\/strong><\/th>\nCapacity<\/strong><\/th>\nAccuracy<\/strong><\/th>\nStrengths<\/strong><\/th>\nBorders<\/strong><\/th>\n<\/tr>\n<\/thead>\n
    Piston Dispenser<\/td>\n0.5 to 50 ml<\/td>\n\u00b10.5 %<\/td>\nPaste-like and high-viscosity products, high precision<\/td>\nProduct contact, cleaning effort<\/td>\n<\/tr>\n
    Peristaltic pump<\/td>\n1 to 30 ml<\/td>\n\u00b10.5 to \u00b11 %<\/td>\nConveyance via the hose only\u2014fastest product changeover, hygienic<\/td>\nHose is a wear part; do not use coarse pastes<\/td>\n<\/tr>\n
    Time-Pressure System<\/td>\n5 to 50 ml<\/td>\n\u00b11 to \u00b12 %<\/td>\nsimple, affordable<\/td>\nTemperature-dependent viscosity affects accuracy<\/td>\n<\/tr>\n
    Diaphragm Dispenser<\/td>\n2 to 40 ml<\/td>\n\u00b11 %<\/td>\naggressive media, sealed<\/td>\nlimited viscosity range<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    The rule of thumb: low-viscosity surfactants and juices are dispensed using time-pressure or peristaltic pumps; creams and gels using a piston dispenser; and aggressive or sterile products using a diaphragm or peristaltic pump. The choice of method depends on the product specifications\u2014viscosity in millipascal-seconds, shear behavior, and temperature range.<\/p>\n

    The Drip Problem: Three Technical Solutions<\/h2>\n

    Every drop on the outside of the bag poses a hygiene and sealing problem. Three established designs keep the filling tube dry:<\/p>\n