ZS-FS220UB Liquid Sachet Packaging Machine: Complete Guide to High-Speed VFFS Small Pouch Filling
📌 What You'll Learn
How the ZONESUN ZS-FS220UB liquid sachet packaging machine works, the VFFS technology behind it, key features and filling system, flexible sealing formats, industry applications, and how to choose the right configuration for your production line.
📖 Table of Contents
What Is a Liquid Sachet Packaging Machine?
A liquid sachet packaging machine — also known as a VFFS sachet machine or small pouch filling machine — is an automated vertical form fill seal (VFFS) system that continuously produces small sealed pouches filled with liquid or semi-liquid products at high speed.
The fully automated process covers every stage of sachet production in a single continuous operation:
- Film unwinding — roll film is fed into the forming system
- Sachet forming — film is shaped into the target pouch geometry
- Liquid dosing and filling — pump system accurately dispenses the set volume
- Heat sealing — top and side seals are applied to create a leak-proof closure
- Cutting — finished sachets are separated into individual packs
This automation replaces manual filling and sealing, delivering higher speed, better consistency, and significantly reduced labor costs compared to semi-manual or batch-based packaging methods.
"Small sachet packaging is one of the fastest-growing formats in liquid consumer goods — driven by demand for single-use convenience, product sampling, and cost-efficient e-commerce packaging."
— Packaging World / PMMI Industry Research
ZS-FS220UB Machine Overview
The ZONESUN ZS-FS220UB is a compact yet high-performance automatic liquid sachet packaging machine designed for small-dose liquid and semi-liquid products. It integrates a complete VFFS production system into a single machine footprint — making it suitable for both standalone production and inline integration.
The ZS-FS220UB is widely deployed in industries requiring sample packaging, single-use portions, promotional packs, and retail-ready sachets across cosmetics, food, pharmaceutical, and chemical sectors.
How the ZS-FS220UB Works
The ZS-FS220UB operates as a fully automated continuous-motion VFFS system. The complete production cycle runs without manual intervention:
- Film feeding — roll film is automatically pulled into the machine from the film reel holder
- Bag forming — the forming collar shapes the flat film into the target sachet tube geometry
- Liquid filling — the pump dosing system dispenses the programmed fill volume into each sachet
- Heat sealing — horizontal and vertical sealing jaws apply controlled heat and pressure to create leak-proof seals
- Cutting and discharge — the cutting system separates finished sachets and discharges them to the output conveyor or collection bin
The PLC control system coordinates all stages simultaneously, ensuring stable production output, consistent fill accuracy, and minimal downtime across extended production runs.
Key Features of the ZS-FS220UB
⚡ High-Speed Production
The ZS-FS220UB achieves production speeds of 45–150 sachets per minute, depending on product viscosity, fill volume, and sachet size — delivering throughput suitable for medium to high-volume production lines.
🎯 Accurate Liquid Filling System
Equipped with advanced pump dosing systems — including magnetic pump or piston pump options — the machine ensures precise fill volume for every sachet, minimizing product waste and maintaining consistent pack weight across the entire production run.
📦 Flexible Sealing Formats
The ZS-FS220UB supports multiple sachet sealing configurations to match different product and market requirements:
- 3-side seal — standard flat sachet format, widely used for cosmetic and food samples
- 4-side seal — fully sealed perimeter for maximum leak protection
- Back seal (pillow pouch) — vertical back seam format for high-speed continuous production
🖥️ Intelligent PLC Control
The touchscreen PLC interface allows operators to easily configure and adjust all key production parameters without specialized technical training:
- Fill volume per sachet
- Bag length and width
- Sealing temperature and dwell time
- Production speed settings
🏭 Wide Viscosity Range
The machine handles a broad range of liquid viscosities — from low-viscosity water-like liquids (serums, oral solutions) to thicker semi-fluids (sauces, gels, honey) — with pump system selection matched to product characteristics.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | ZS-FS220UB |
| Machine Type | Vertical Form Fill Seal (VFFS) |
| Filling System | Pump-based liquid dosing (magnetic / piston pump) |
| Filling Range | Customizable (typically 0.1–20 ml) |
| Sealing Type | 3-side seal / 4-side seal / Back seal |
| Production Speed | 45–150 bags/min |
| Control System | PLC touchscreen interface |
Application Industries
The ZS-FS220UB is deployed across a wide range of liquid packaging industries where small-dose, single-use, or sample sachet formats are required:
Cosmetics & Personal Care
- Facial serum and essence samples
- Shampoo and conditioner sachets
- Lotion, cream, and mask gel packs
- Setting spray and toner samples
Food & Beverage
- Sauce packets (ketchup, mayonnaise, soy sauce, chili oil)
- Honey and syrup sachets
- Cooking oil samples and portion packs
- Salad dressing and condiment packs
Pharmaceutical
- Oral liquid packaging and unit-dose sachets
- Syrup samples and pediatric dose packs
- Medical liquid single-use doses
Chemical & Industrial
- Cleaning liquid samples and trial packs
- Lubricant and adhesive portion packs
- Industrial liquid testing and QC samples
Customization Options
The ZS-FS220UB can be configured and customized to match specific production requirements:
- Pump system selection — magnetic pump for low-viscosity liquids; piston pump for thicker semi-fluids and gels
- Sachet size and shape — custom forming tooling for different pouch dimensions and seal widths
- Multi-lane configuration — parallel lane production for higher throughput on the same machine footprint
- Date coding and printing integration — inline inkjet or thermal transfer coding for batch and expiry date marking
- Stainless steel food-grade upgrades — full SUS304/316 contact parts for food and pharmaceutical compliance
- OEM and branding — custom machine branding and configuration for OEM customers
Why Sachet Packaging Is the Smart Choice
Compared with traditional bottles, jars, or bulk containers, sachet packaging delivers measurable advantages across cost, logistics, and marketing:
- Lower packaging material cost — flexible film uses significantly less material per unit than rigid containers
- Easier transportation and storage — flat sachets stack efficiently, reducing shipping volume and warehouse space
- Ideal for product sampling and promotion — low-cost single-use packs drive trial and conversion in retail and e-commerce
- Reduced product waste — precise single-dose filling eliminates over-dispensing and product spoilage
- Increased consumer convenience — portable, hygienic, and easy-to-open format preferred in on-the-go and travel markets
"Automated sachet packaging systems typically deliver ROI within 12–18 months through combined savings in material cost, labor reduction, and increased production throughput."
— Packaging Digest, Flexible Packaging Automation Analysis
FAQ
What liquids can the ZS-FS220UB handle?
The ZS-FS220UB handles a wide range of liquid viscosities — from thin water-like liquids (serums, oral solutions, water) to thicker semi-fluids (sauces, gels, honey, lotions). Pump system selection (magnetic vs. piston) is matched to the product's viscosity and flow characteristics.
What is the minimum and maximum fill volume?
The standard fill range is approximately 0.1–20 ml per sachet, with the exact range depending on pump configuration and sachet size. Custom fill ranges outside this specification are available — contact ZONESUN's engineering team for your specific requirements.
What film materials are compatible with the ZS-FS220UB?
The machine is compatible with a range of flexible packaging films including PE, PET/PE laminate, BOPP/PE, aluminum foil laminate, and other heat-sealable composite films. Film selection depends on product compatibility, barrier requirements, and seal strength specifications.
Can the machine be integrated into an existing production line?
Yes. The ZS-FS220UB can be configured for inline integration with upstream filling systems, downstream conveyors, cartoning machines, or secondary packaging equipment. Multi-lane configurations are also available for higher throughput on the same machine footprint.
Does ZONESUN offer OEM or custom configurations?
Yes. ZONESUN provides full OEM and ODM customization for the ZS-FS220UB, including custom sachet sizes, pump systems, printing integration, food-grade material upgrades, and machine branding. Contact our engineering team to discuss your specific production requirements.
Find the Right Liquid Sachet Packaging Solution for Your Line
Tell us your product type, fill volume, and production speed requirements — ZONESUN's engineering team will recommend the right sachet packaging configuration for your operation.