Solution topic
How to choose small pouches for liquids and pastes? VFFS roll film, pre-made pouches, and spouted pouches: start with the packaging source
Back-seal or three-side-seal VFFS forms pouches in-line from roll film; the pre-made pouch route starts from finished pouches; spouted pouches also require spout positioning and sc
- Back-seal or three-side-seal VFFS forms pouches in-line from roll film; the pre-made pouch route starts from finished pouches; spouted pouches also require spout positioning and screw capping, and the pump body and anti-drip features must be validated with the actual product.
Solution summary prepared for you
- What is the difference between liquid VFFS packaging machine and pre-made bag feeding machine?
- How to choose between back seal and three-side seal liquid small pouches?
- How to reduce bag mouth contamination for high-viscosity or stringy materials?
Route comparison
- Liquids or pastes that need to be continuously formed into regular small pouches from laminated roll film and complete metering and sealing
- Bag forming, metering, longitudinal or side sealing, and cross sealing and cutting can be completed continuously
- Pump, bag length, drip-proof, and cross-sealing contamination prevention need to be coordinated with material and film
- When packaging must use complex accessories or finished pre-made bags have already been purchased, compare other routes
- Liquid back seal or three-side seal VFFS packaging machine configured with metering pump and filling nozzle according to material
- Projects where flat pouches, stand-up pouches, or zipper pouches are already finalized and require multi-station bag picking, filling, and sealing
- Complex bag shapes can be completed in the pre-making stage; the main machine handles bag picking, opening, filling, and heat sealing
- Film batch, bag opening state, bag mouth contamination, and metering time limit stable cycle
- When bag shape is simple and high-volume roll film bag making is more cost-effective, compare VFFS first
- Rotary pre-made bag packaging machine integrated with liquid metering, drip-proof, and inspection as needed
- Resealable packaging requiring spout positioning, liquid filling, cap feeding, and screw capping
- Filling and cap sealing are organized around the spout pouch interface, forming a clear user experience
- Spout, cap, filling nozzle, bag body support, and capping state all need confirmation with actual samples
- When the product does not need a spout or spout supply is unstable, unnecessary sealing structures should not be added
- Stand-up spout pouch filling and capping integrated machine with bag feeding, cap feeding, and downstream inspection
Associated Equipment / Consumables
Liquid Back Seal / Three-Side Seal VFFS Packaging MachineThe liquid VFFS packaging machine starts from roll film to complete bag making, liquid or paste metering, longitudinal or side sealing, cross sealing and cutting, and bag discharge. Back seal and three-side seal corre...
Dual-Lane Horizontal Premade Pouch Packaging Machine
Anti-Drip Anti-Stringing Filling Nozzle AssemblyMaterial metering and drip-proof test; Real materials are used to confirm pump response and drip boundary before sealing; Liquid quantitative filling machine and drip-...
Inline CheckweigherCheck finished product weight; Checkweighing range should be set based on single bag target weight and rejection criteria; Online checkweigher
Core process
Sample details
Real material viscosity, temperature, foaming, stringing, particles, and corrosiveness are used to select feeding, metering, and contact parts.
Provide real materials and specify viscosity, temperature, foaming, stringing, particles, and corrosivenessTarget fill volume, deviation judgment, sustained capacity, and continuous production time together determine the metering range and overall line cycle.
Provide target fill volume, allowable deviation, stable capacity, and continuous production timeRoll film, ordinary pre-made bags, and spout pouches have different bag forming and closing methods; actual packaging materials should be used to first distinguish the main machine route.
Specify whether using roll film, pre-made bags, or spout pouches and provide packaging material samplesFinished bag dimensions, sealing form, spout direction, and cap combination are used to verify clamping, heat sealing, or capping stations.
Provide finished bag dimensions, sealing form, spout and cap informationInsulation, stirring, suck-back, drip-proof, and cleaning requirements determine the material path and filling nozzle configuration, and should be verified with actual materials.
Specify insulation, stirring, suck-back, drip-proof, and cleaning requirementsCoding, easy-tear notch, gas flushing, inspection, and finished product conveying need to be determined item by item to avoid conflicts with bag mouth sealing and clamping mechanisms.
List coding, easy-tear notch, gas flushing, inspection, and finished product conveying requirementsCommon selection mistakes
View detailed technical notes
Real customer questions
Sauces, seasoning liquids, daily chemical liquids, and pastes can all be made into small pouches, but viscosity, temperature, foaming, stringing, corrosiveness, and particles affect the pump, filling nozzle, suck-back, cleaning, and sealing contamination prevention. For low-cost continuous bag making, compare VFFS; for complex bag shapes, compare pre-made bags; for repeated opening or sipping experience, evaluate spout pouch filling and capping.
First determine the packaging route
Back seal or three-side seal VFFS forms bags online from roll film; pre-made bag route starts from finished bags; spout pouches also need spout positioning and capping. Pump and drip-proof must be verified with actual materials.
Liquid back seal or three-side seal VFFS route
Suitable for: liquids or pastes that need to be continuously formed into regular small pouches from laminated roll film and complete metering and sealing. Advantages: bag forming, metering, longitudinal or side sealing, and cross sealing and cutting can be completed continuously. Limitations: pump, bag length, drip-proof, and cross-sealing contamination prevention need to be coordinated with material and film. Not recommended: when packaging must use complex accessories or finished pre-made bags have already been purchased, compare other routes. Equipment direction: liquid back seal or three-side seal VFFS packaging machine configured with metering pump and filling nozzle according to material.
Rotary pre-made bag filling and sealing route
Suitable for: projects where flat pouches, stand-up pouches, or zipper pouches are already finalized and require multi-station bag picking, filling, and sealing. Advantages: complex bag shapes can be completed in the pre-making stage; the main machine handles bag picking, opening, filling, and heat sealing. Limitations: film batch, bag opening state, bag mouth contamination, and metering time limit stable cycle. Not recommended: when bag shape is simple and high-volume roll film bag making is more cost-effective, compare VFFS first. Equipment direction: rotary pre-made bag packaging machine integrated with liquid metering, drip-proof, and inspection as needed.
Stand-up spout pouch filling and capping route
Suitable for: resealable packaging requiring spout positioning, liquid filling, cap feeding, and screw capping. Advantages: filling and cap sealing are organized around the spout pouch interface, forming a clear user experience. Limitations: spout, cap, filling nozzle, bag body support, and capping state all need confirmation with actual samples. Not recommended: when the product does not need a spout or spout supply is unstable, unnecessary sealing structures should not be added. Equipment direction: stand-up spout pouch filling and capping integrated machine with bag feeding, cap feeding, and downstream inspection.
Recommended equipment route: material metering and drip-proof test
Real materials are used to confirm pump response and drip boundary before sealing.
Recommended equipment route: choose the main machine by packaging source
In-line bag forming from roll film and pre-made bag feeding require different machine architectures.
Recommended equipment route: choose spout sealing by usage method
Only packaging that requires a spout and cap enters the filling and screw capping route.
Recommended equipment route: check finished pouch weight
The checkweighing range should be set according to the target weight per pouch and the rejection criteria.
Common questions
Can liquid and paste share the same VFFS main machine?
It can be evaluated, but the metering pump, filling nozzle, drip-proof and cleaning need to be confirmed separately according to the material.
Which is better: back seal or three-side seal?
There is no one-size-fits-all answer; it should be selected based on the finished product appearance, film structure, and sealing requirements.
Can VFFS directly use pre-made bags?
Conventional VFFS forms bags from roll film; pre-made bags usually require a pre-made bag packaging route.
Can high-viscosity sauces be made into small pouches?
You can first use real materials to verify the pump body, drip-proof, bag mouth cleaning, and sealing.
Do spout pouches always need automatic cap feeding?
Not necessarily; the cap feeding and capping method should be determined based on capacity, spout, and project automation scope.
Can water testing determine sauce production capacity?
No, real viscosity, temperature, stringing, and particle state will change the filling cycle.