SJYB-IIISD Class 100 Cleanroom-Grade Back-Seal Dual-Head Fully Automatic Liquid Packaging Machine

1. Product Overview

The SJYB-IIISD is an industrial-grade, cleanroom-certified Dual-Head Fully Automatic Back-Seal Liquid Packaging Machine engineered for the modern dairy, beverage, condiment, and liquid food industries. Designed to handle continuous, high-throughput production at 50–134 bags per minute, this advanced system fully automates the complete packaging process — from film feeding, top-mounted Class 100 clean purification, and UV sterilization through to precision metering, back sealing, cutting, batch coding, and finished bag discharge.

By integrating a modular PLC control architecture with servo-driven and pneumatic actuation, the SJYB-IIISD achieves consistent, high-precision filling at a metering accuracy of ±0.5–1% while accommodating a flexible fill range of 100–1,000 ml per bag. Supporting a wide product portfolio including pasteurized milk, yogurt, fruit juice, soy milk, drinking water, plant-based beverages, sauces, edible oils, liquid fertilizers, lubricants, and liquid detergents, it seamlessly interfaces with upstream processing lines to deliver a continuous, hygienic, and highly stable output — making it the premier turnkey solution for ESL and high-throughput liquid packaging operations requiring cleanroom-level contamination control.

2. Technical Parameters

Technical Parameters	Specifications
Model	SJYB-IIISD
Production Capacity	50–134 bags/min
Fill Volume Range	100–1,000 ml
Film Width	240–350 mm
Metering Accuracy	±0.5–1%
Working Pressure	0.65 MPa
Air Consumption	1.0 m³/min (at 0.8 MPa)
Power Supply	AC 220V ±10%, 50 Hz
Maximum Power	3.5 kW
Overall Dimensions (L×W×H)	1700 × 1600 × 3300 mm
Equipment Weight	700 kg
Packaging Film Material	PE Film

3. Four Core Advantages

• Top-Mounted Class 100 Clean Purification Unit: Equipped with an integrated, removable top-mounted Class 100 clean laminar flow purification device. This system blankets the film feeding and filling zones with positive-pressure purified sterile air, ensuring that the entire packaging process is completed in a strictly hygienic, cleanroom-grade environment — critically reducing mold, yeast, and airborne contamination risks for ESL and premium dairy products.

• Modular PLC Architecture with Touchscreen HMI: Features a fully modular design built on an industrial-grade PLC controller, paired with an intuitive human-machine interface (HMI) touchscreen panel. Operators can manage production parameters, recipe settings, speed control, and fault diagnostics in real time — minimizing changeover time and maximizing operational flexibility across diverse product SKUs.

• Elite Metering Accuracy & Full-Process Automation: Delivers exceptional dosing precision with a metering accuracy of ±0.5–1%, ensuring consistent fill weights across every bag. The system automates the full packaging sequence — including film drawing, bag forming, liquid filling, back sealing, cutting, and date printing — eliminating manual intervention and reducing labor dependency at every stage of the line.

• CIP-Ready Hygienic Design for Rapid Changeovers: Engineered with full CIP (Clean-In-Place) automatic circuit flushing compatibility. All fluid-contact pathways feature smooth-radius sanitary bends and polished internal surfaces to eliminate hygienic dead zones. When connected to your facility’s CIP loop, the system undergoes automated chemical cleaning and sanitizing cycles, ensuring contamination-free transitions between product batches and continuous industrial uptime.

4. Technical Workflows & Features

• Cleanroom-Grade Positive-Pressure Purification: The removable top-mounted Class 100 laminar flow unit continuously supplies HEPA-filtered, positive-pressure sterile air directly over the film unwinding and filling zones. This creates an invisible protective air curtain that isolates all product-contact surfaces from ambient factory air throughout the entire packaging cycle.

• Dual-Head Parallel Back-Seal Filling: The dual-head configuration allows two bags to be formed, filled, and back-sealed simultaneously in a single machine cycle, effectively doubling throughput relative to single-head designs without increasing the equipment footprint. The back-seal structure provides superior bag rigidity and leak-resistance for liquid products across a broad viscosity range.

• Inline UV Film Sterilization: Prior to reaching the filling zone, the inner surface of the PE film passes through a UV irradiation chamber. This contactless sterilization step deactivates surface bacteria and molds, extending product shelf life without the need for chemical preservatives or additional aseptic infrastructure — complementing the Class 100 purification system for a dual-barrier hygiene approach.

• Universal Downstream Integration: The SJYB-IIISD features a universal signal interface framework within its PLC control panel. It communicates directly with upstream liquid supply systems and downstream conveyors or secondary packaging equipment, enabling seamless integration into fully automated production lines across diverse factory environments.

5. Product FAQ

Q1: What makes the SJYB-IIISD different from a standard liquid packaging machine?

A: The defining difference is the integrated top-mounted Class 100 clean laminar flow purification system. While standard machines rely solely on UV sterilization for film hygiene, the SJYB-IIISD adds a positive-pressure sterile air curtain that blankets the entire filling and sealing zone — creating a dual-barrier contamination control approach. This makes it the preferred choice for premium ESL dairy products, pasteurized milk, and any liquid product where extended shelf life and microbial stability are critical requirements.

Q2: How does the back-seal design compare to a side-seal configuration?

A: The back-seal configuration forms a longitudinal seal along the rear of the bag, creating a more structurally rigid pouch that is less prone to leakage under internal liquid pressure. This design is particularly advantageous for higher-viscosity products such as yogurt, sauces, and thick beverages, as well as for larger fill volumes where bag integrity during transport and retail display is essential. The SJYB-IIISD back-seal structure also accommodates a wider film width of up to 350 mm, enabling a broader range of bag formats compared to side-seal alternatives.

Q3: How does the Class 100 purification unit work, and can it be removed for maintenance?

A: The Class 100 laminar flow purification unit is mounted directly above the film feeding and filling zones. It draws ambient factory air through a multi-stage HEPA filtration system and delivers a continuous, downward-flowing curtain of positively pressurized sterile air over all product-contact areas. This prevents airborne microorganisms from settling on the film, the fill nozzles, or the open bag mouth during the filling cycle. Critically, the unit is designed as a removable module, allowing operators to detach it quickly for routine filter replacement, deep cleaning, or maintenance without disrupting the main machine structure.

Q4: What product types and viscosities is the SJYB-IIISD compatible with?

A: The SJYB-IIISD is engineered for a broad spectrum of liquid and semi-liquid products spanning a wide viscosity range. Its standard configuration is compatible with pasteurized milk, yogurt, fruit juice, soy milk, drinking water, plant-based beverages, soy sauce, vinegar, edible oils, liquid fertilizers, lubricants, liquid detergents, and liquid cosmetics. The dual-head back-seal filling system handles both free-flowing liquids and moderately viscous products without requiring nozzle changes, making it one of the most versatile cleanroom-grade packaging platforms available for multi-category production facilities.

Q5: Can the SJYB-IIISD be integrated into an existing automated production line?

A: Yes, absolutely. The SJYB-IIISD is built as an open-architecture packaging platform. Its PLC control unit supports standard industrial signal protocols, allowing it to receive start/stop commands, speed synchronization signals, and fault interlocks from upstream liquid supply tanks, homogenizers, or pasteurizers, as well as downstream conveyors and case-packing equipment. The machine’s compact footprint at 1700 × 1600 mm makes it straightforward to incorporate into both greenfield line builds and the upgrade of existing packaging infrastructure with minimal civil works.