Back Sealing Strip Packaging Machine
The Back Sealing Strip Packaging Machine is a compact, fully automatic VFFS (vertical form-fill-seal) solution designed for stable forming, accurate filling, and high-integrity sealing of small sachets. Built for composite plastic films and flexible production demands, it integrates bag making, dosing coordination, sealing, and cutting into a continuous workflow that supports reliable output on modern packaging lines. With a bag width range of 20–80 mm and a maximum bag length of 150 mm, it is well suited for brands and factories that require consistent pouch appearance, dependable seal strength, and efficient changeover for different products. From free-flowing granules to fine powders and leak-sensitive liquids, the machine is engineered to deliver repeatable performance while keeping daily operation straightforward through PLC-based control and stable film tracking.
Product Features
Stable Speed for Continuous Production
Running at 20–40 bags per minute, the machine supports continuous packaging with consistent sealing and cutting results. Automated forming and sealing minimize manual intervention, helping improve overall line efficiency and reduce operator workload in repetitive sachet packaging tasks.
Clean Back Seal with Adjustable Sealing Width
The back sealing strip is adjustable from 5–10 mm and uses a clean, pattern-free finish to maintain a neat appearance across different film structures. This design supports a professional shelf look while maintaining sealing reliability for various product categories.
Reinforced Horizontal Sealing Options
Horizontal sealing width is 8–10 mm, with optional surface patterns to match packaging film behavior and sealing requirements. Users can select a diagonal mesh pattern (1 mm spacing) or a straight pattern (2 mm spacing) to enhance seal strength, improve consistency, and support stable performance on printed and unprinted films.
Leak-Prevention Design for Liquid Sachets
For liquid packaging, an optional 1 mm horizontal sealing leak-proof line increases sealing integrity and helps reduce the risk of seepage during handling, transport, and storage. This is especially valuable for products that are sensitive to leakage, such as sauces, concentrates, detergents, and cosmetic liquids.
Accurate Dosing Coordination and Repeatable Bag Length
Measurement accuracy is ±1–10% (depending on material characteristics and fill quantity), supporting stable output across different product types and packaging sizes. Film transport and bag length control are handled by a variable-frequency motor crank structure combined with heat-sealed bag pulling, delivering smooth pulling, consistent bag forming, and reliable synchronization with sealing and cutting.
PLC Control with Reliable Registration Tracking
A PLC control system enables fast parameter setting, stable operation, and repeatable production performance. The JULONG dual-color photoelectric eye supports accurate film tracking for printed film registration marks, improving alignment, cutting position consistency, and overall sachet appearance—particularly important for branded packaging.
Flexible Cutting Styles for Different Presentation Needs
The machine supports flat cut or serrated cut using an independent cutter design, with 3 mm spacing between cutters. This allows manufacturers to choose a cut style that best suits consumer opening experience, downstream packing, and display requirements.
Technical Specifications
| Item | Specification |
|---|---|
| Machine Name | Back Sealing Strip Packaging Machine |
| Type | Automatic |
| Bag Making Range | Bag Width: 20–80 mm; Bag Length: ≤150 mm |
| Speed | 20–40 bags/min |
| Measurement Accuracy | ±1–10% (depending on packaging materials and fill quantity) |
| Packaging Film | Composite packaging materials (compatible with plastic films) |
| Back Sealing Width | 5–10 mm, no pattern |
| Horizontal Sealing Width | 8–10 mm; diagonal mesh (1 mm spacing) or straight pattern (2 mm spacing) |
| Horizontal Sealing Leak-Proof Line | 1 mm (liquid packaging only) |
| Sealing Form | Twisted edge adhesive sealing |
| Bag Pulling Method | Variable frequency motor crank structure; heat-sealed bag pulling |
| Cutting Method | Flat cut or serrated cut (independent cutter); 3 mm spacing between cutters |
| Control System | PLC control |
| Optoelectronic Eye | JULONG dual-color photoelectric |
| Machine Material | Stainless steel |
| Weight | 350 kg |
| Size | Customized |
Application Areas
The machine is designed for automated sachet packaging using composite plastic films in industries that require compact bag sizes and dependable sealing. Typical applications include liquid sachets that benefit from enhanced leak prevention, as well as powder and granule products that demand stable bag forming and consistent cutting. It is widely used in food and beverage (seasonings, sauces, drink concentrates), daily chemicals (shampoo, detergent samples), agricultural products (seeds, additives, granules), and general industrial packaging where clean back sealing, accurate tracking on printed films, and reliable horizontal sealing are key production requirements.
