Check applicable objects first
Back seal or three-side seal bags formed online from roll film; bag width, length, seal edges, and tear notch confirmed per finished bag sample
Liquid roll film bag forming filling sealing
Liquid and Paste Back-Seal / Three-Side-Seal VFFS Machine
The machine forms bags from rollstock, meters liquid or paste, completes longitudinal and cross seals, cuts and discharges. It differs from premade-pouch and spout-pouch lines. Trial viscosity, foaming, stringing, pump, suck-back, drip control, film seal layer, tension, registration and cleaning with actual materials.
Actual equipment mediaBack seal or three-side sealParameters confirmed per project
Factory equipment photos
Actual equipment photos from the factory. Confirm the final configuration with the containers, product, sample trials and agreed equipment scope.
First see actual working conditions
First determine bag shape, then match metering and sealing
Please provide material, target filling volume, finished bag sample or drawing, roll film, cleaning requirements, target speed, and site conditions.
Packaging material and process must match
Composite roll film suitable for bag making and heat sealing; film width, thickness, friction, heat seal layer, and print registration confirmed per film sample; roll film unwinding, bag forming, longitudinal or side sealing, metering filling, cross sealing and cutting, and bag discharge
Optional modules are not standard
Optional: suck-back drip-proof, temperature maintenance, stirring, easy-tear notch, coding, gas flushing, inspection, and finished bag conveying.
Parameters confirmed per project
Please provide material, target filling volume, finished bag sample or drawing, roll film, cleaning requirements, target speed, and site conditions.
First see actual working conditions
Information recommended before quotation
The more complete the samples, packaging materials, and site information, the easier to determine equipment route, changeover scope, and line integration boundaries.
Configuration reference
- Back seal or three-side seal bag type selected based on finished appearance, film material, and bag forming structure
- Metering pump, filling nozzle, and drip-proof confirmed according to viscosity, foaming, and particle conditions
- Temperature-maintained stirring, coding, easy-tear notch, gas flushing, and inspection are all optional modules
- Filling accuracy, sealing window, and speed confirmed through material and film trials
Prepare for selection
- Liquid or paste sample, viscosity, temperature, foaming, stringing, and particle information
- Target fill weight per bag, allowable tolerance, and drip-proof or temperature maintenance requirements
- Roll film and finished bag sample, bag width and length, heat seal layer, and print registration
- Cleaning and material change, target speed, power and air supply, and finished bag conveying requirements
First see actual working conditions
Key Parameters
Capacity and Speed
Confirm actual capacity through project trials covering bag length, dosing time, product foaming and stringing, cross-seal cleanliness and film tracking.
Automation Scope
Automatic roll film bag making, liquid metering, and sealing/cutting; coding, easy-tear notch, gas flushing, inspection, and conveying are optional per project
Applicable Container or Packaging
Back seal or three-side seal bags formed online from roll film; bag width, length, seal edges, and tear notch confirmed per finished bag sample
Applicable Materials
Liquids, pastes, or materials containing small particles; viscosity, temperature, foaming, stringing, corrosiveness, and cleaning conditions must be specified
Packaging Materials and Consumables
Composite roll film suitable for bag making and heat sealing; film width, thickness, friction, heat seal layer, and print registration confirmed per film sample
Basic Process
Roll film unwinding, bag forming, longitudinal or side sealing, metering filling, cross sealing and cutting, and bag discharge
Tooling and Changeover
Adjust or replace bag former, film path, pump, filling nozzle, and sealing/cutting positions according to bag width, bag shape, and filling range
Power, Air Supply, and Layout
Confirm equipment dimensions, power, air supply, maintenance space, and upstream/downstream interfaces based on film drive, liquid metering, heating sealing/cutting, cleaning drainage, and optional inspection modules
Steps from sample confirmation to delivery
Confirm back seal or three-side seal, bag width and length, heat seal layer, and print registration.
Select pump, valves, filling nozzle, drip-proof, and cleaning structure.
Avoid material contamination of cross seal and confirm bag length, sealing, and cutting.
Check metering, bag forming, sealing, cleaning, and film/material change.
Common configuration routes
Compare back seal, three-side seal, and pre-made bag liquid packaging routes
VFFS rollstock, premade-pouch filling and spout-pouch filling/capping are distinct routes selected by pack format, product behaviour, closure structure and consumer use.
Back seal bag route
Roll film forms a back seal bag around the bag former, suitable for common vertical bag forming structures.
Three-side seal route
Configure sealing and cutting structure according to finished three-side seal appearance; compatibility range needs confirmation.
Pre-made bag route
Uses pre-made bags for filling, suitable for projects with complex bag shapes or different appearance requirements.
Liquid roll film bag forming filling sealing
First see actual working conditions
Frequently Asked Questions
Can back seal and three-side seal be switched on the same machine?
The structures are quite different; compatibility depends on the bag forming and sealing design. Usually, change parts or separate configurations are needed; not supported by default.
Can liquids with particles be packaged?
It can be evaluated, but particle size, concentration, and integrity affect the pump, valves, filling nozzle, and seal contamination. Actual material testing is required.
Send samples and requirements
First confirm samples, packaging materials, and process, then determine final configuration
Send liquid or paste samples, viscosity, temperature and particles, dose, finished pouch or dimensions, film layers and seal side, print registration, cleaning needs, target cycle and discharge method.
Liquid or paste sample, viscosity, temperature, foaming, stringing, and particle informationTarget fill weight per bag, allowable tolerance, and drip-proof or temperature maintenance requirementsRoll film and finished bag sample, bag width and length, heat seal layer, and print registrationCleaning and material change, target speed, power and air supply, and finished bag conveying requirements