SYB/SJYB-IIISD-F Composite Film Back-Seal Dual-Head Automatic Liquid Packaging Machine

1. Product Overview

The SJYB-IIISD-F is an industrial-grade, cleanroom-capable Dual-Head Fully Automatic Composite Film Back-Seal Liquid Packaging Machine engineered for the premium dairy, food service, and condiment industries. Designed to handle continuous production at 36–90 bags per minute, this advanced system fully automates the complete packaging process — from composite film feeding, optional Class 100 clean purification, and UV sterilization through to precision metering, multi-layer 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-F achieves consistent, high-precision filling at a metering accuracy of ±0.5–1% across a broad fill range of 100–1,200 ml per bag. Its height-adjustable lift frame and stepless format adjustment enable rapid, tool-free transitions between different bag sizes and product SKUs. Supporting premium product categories including whipping cream, egg liquid, cheese, fresh milk, yogurt, soy milk, condiments, edible oils, liquid detergents, and paints, it seamlessly interfaces with upstream processing lines to deliver a continuous, hygienic, and highly stable output — making it the premier turnkey solution for high-value composite film liquid packaging operations.

2. Technical Parameters

Technical Parameters	Specifications
Model	SYB/SJYB-IIISD-F
Production Capacity	36–90 bags/min
Fill Volume Range	500–100 ml / 1,200–500 ml (dual-range configuration)
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	4 kW
Overall Dimensions (L×W×H)	1700 × 1650 × 3300 mm
Equipment Weight	700 kg
Packaging Film Material	Composite Film

3. Four Core Advantages

• Optional Class 100 Clean Purification Unit: Available with an integrated, removable top-mounted Class 100 clean laminar flow purification device. This system delivers positive-pressure HEPA-filtered sterile air over all film feeding and filling zones, enabling the entire packaging process to be completed in a cleanroom-grade environment — a critical safeguard for high-value, contamination-sensitive products such as whipping cream, egg liquid, and premium dairy.

• Stepless Height-Adjustable Lift Frame: Features a motorized, stepless lift frame that accommodates a wide range of bag height formats without manual tooling or fixed mechanical stops. Operators can transition between different product sizes and packaging formats rapidly and continuously, dramatically reducing format changeover downtime and enabling a single machine to serve multiple SKUs across diverse product lines.

• Multi-Layer Seal Jaw Design for Composite Film Integrity: Engineered with a proprietary multi-layer seal jaw system optimized specifically for composite film structures. The staggered multi-point sealing design distributes heat and pressure evenly across the full seal width, achieving superior bond strength and hermetic integrity — preventing delamination, liquid seepage, and seal failure even for high-fat, high-acid, or high-viscosity contents.

• Modular PLC Architecture with Full-Process Automation: Built on an industrial-grade PLC controller paired with an intuitive HMI touchscreen panel. The system automates the complete packaging sequence — film drawing, bag forming, metered filling, multi-layer back sealing, cutting, and date printing — while supporting CIP automatic circuit flushing for rapid, contamination-free batch transitions and continuous industrial uptime.

4. Technical Workflows & Features

• Composite Film Handling & UV Sterilization: The SJYB-IIISD-F is purpose-designed for composite film substrates, which require precisely controlled tension, unwinding speed, and thermal sealing parameters that differ significantly from standard PE film. An integrated inline UV irradiation chamber sterilizes the inner film surface prior to filling, providing a primary hygienic barrier that complements the optional Class 100 purification unit for dual-layer contamination control.

• Stepless Format Changeover System: The height-adjustable lift frame operates through a motorized stepless mechanism, allowing operators to dial in the precise bag height for any product format within the machine’s range without stopping the line for manual adjustments. This capability enables the SJYB-IIISD-F to serve as a single flexible platform across multiple product SKUs, reducing capital expenditure on dedicated packaging lines.

• Dual-Head Parallel Back-Seal Filling: The dual-head configuration forms, fills, and back-seals two bags simultaneously in each machine cycle, maximizing throughput within the composite film speed envelope. The back-seal structure provides superior pouch rigidity and leak resistance — particularly important for high-fat dairy products such as whipping cream and egg liquid, where seal integrity directly impacts product safety and shelf life.

• Universal Upstream & Downstream Integration: The SJYB-IIISD-F PLC control unit supports standard industrial signal protocols for bidirectional communication with upstream supply tanks, homogenizers, and pasteurizers, as well as downstream conveyors and secondary packaging systems. This open-architecture design makes it straightforward to embed the machine into both new greenfield lines and existing packaging infrastructure upgrades.

5. Product FAQ

Q1: Why is composite film used instead of standard PE film, and what products require it?

A: Composite film consists of multiple bonded layers — typically combining polyethylene, nylon, aluminum foil, or other barrier materials — to achieve properties that single-layer PE film cannot provide, including superior oxygen and moisture barrier performance, puncture resistance, and UV light blocking. These characteristics are essential for high-value, shelf-life-sensitive products such as whipping cream, egg liquid, cheese, premium yogurt, and flavored milk, where extended freshness, fat oxidation prevention, and structural bag integrity are non-negotiable. The SJYB-IIISD-F’s seal jaw system and film tension controls are specifically calibrated for composite film’s unique mechanical and thermal properties.

Q2: What is the benefit of the stepless height-adjustable lift frame?

A: Traditional packaging machines use fixed mechanical stops or manual spacer plates to change bag height formats, requiring the line to halt while technicians physically reconfigure the machine — a process that can take 30 minutes or more per changeover. The SJYB-IIISD-F’s motorized stepless lift frame eliminates this entirely. Operators enter the target bag height on the HMI touchscreen, and the frame adjusts continuously and precisely to any dimension within its range. This enables rapid transitions between, for example, a 200 ml yogurt pouch and a 1,000 ml cooking oil bag, with minimal downtime and no specialized tooling.

Q3: How does the multi-layer seal jaw design improve seal quality on composite film?

A: Composite films present sealing challenges that single-layer PE does not — the bonded layers can delaminate under uneven heat distribution, and the higher thermal mass of multi-layer structures requires more precise temperature and dwell-time control. The SJYB-IIISD-F addresses this with a staggered multi-point seal jaw system that applies calibrated heat and pressure across multiple contact zones simultaneously. This distributes sealing energy evenly across the full composite film cross-section, producing hermetic bonds that resist both internal liquid pressure during transport and external mechanical stress during retail handling — preventing the leakage and delamination failures common with standard single-jaw sealers on composite substrates.

Q4: When should I choose the SJYB-IIISD-F over the standard SJYB-IIISD?

A: The choice depends primarily on two factors: packaging material and product value. If your products require composite film packaging for barrier performance, structural integrity, or brand differentiation — such as whipping cream, egg liquid, cheese sauces, or premium flavored milk — the SJYB-IIISD-F is the correct platform, as its seal jaw system and film handling are purpose-engineered for composite substrates. Additionally, if your production line serves multiple SKUs with significantly different bag heights, the SJYB-IIISD-F’s stepless lift frame provides a flexibility advantage that the standard model’s fixed format system cannot match. For standard PE film dairy and beverage applications at higher speeds, the SJYB-IIISD remains the more cost-efficient choice.

Q5: Can the SJYB-IIISD-F handle both the 100–500 ml and 500–1,200 ml fill ranges on the same machine?

A: Yes. The SJYB-IIISD-F is configured with a dual-range fill volume system covering 100–500 ml and 500–1,200 ml within a single machine platform. Switching between ranges is managed through the HMI recipe system, which adjusts fill timing, pump speed, and volumetric metering parameters automatically. Combined with the stepless lift frame for bag height adjustment and the wide 240–350 mm film width accommodation, the machine can serve the full spectrum from small-format retail pouches to large-format food service bags without requiring separate dedicated equipment for each format.