PLC Automatic Back Seal Strip Packaging Machine for Liquid/Powder/Granules Pouches

All-in-one auto bag forming, filling & back sealing for liquids/powders/granules—boost output, cut labor. PLC control ensures repeatable sealing & fast changeovers. VFD crank + heat-sealed pulling delivers smooth, stable film feed. Leak-proof line option for liquids. Choose mesh/straight seal textures + flat/serrated cuts for premium pouch looks. 350kg heavy-duty build, 1-year warranty.

Product Details

Product Introduction

The Back Sealing Strip Packaging Machine is a fully automatic vertical packaging solution that integrates bag forming, dosing, filling, and sealing into one continuous cycle. Designed for liquids, powders, and granulated products, it converts composite packaging film into neat back-sealed pouches with stable output quality, making it well suited for long-hour, high-efficiency production. The machine adopts PLC-based control and a variable-frequency motor crank pulling structure to coordinate motion and sealing parameters with high repeatability. With heat-sealed bag pulling for dependable traction and a robust 350 kg mechanical body, it maintains smooth film feeding, consistent pouch length, and reliable sealing performance across a wide range of packaging scenarios. Multiple sealing textures and cutting styles are available to match different brand aesthetics, handling convenience, and downstream packing requirements, while the clean, pattern-free back seal helps deliver a professional shelf appearance.

Product Features

All-in-One Automatic Packaging Workflow

Bag making, product filling, and final sealing are completed automatically in a single system, reducing manual intervention and improving line efficiency. This integrated workflow helps standardize pouch appearance and supports stable output in continuous production environments.

PLC Control for Stable, Repeatable Operation

The PLC control system enables clear parameter setting and coordinated control of key actions such as pulling, sealing, and cutting. This improves operational consistency, shortens changeover time, and supports smoother integration into automated packaging lines.

Stable Film Feeding with Heat-Sealed Bag Pulling

A variable-frequency motor crank structure provides smooth, controllable bag pulling. Combined with heat-sealed pulling, the machine enhances grip on composite films, improving running stability and helping maintain consistent pouch forming during higher-speed operation.

Strong Sealing with Flexible Texture Options

The machine uses twisted edge adhesive sealing to support firm closure and reliable sealing integrity. Horizontal sealing supports multiple pattern choices: a diagonal mesh texture (1 mm spacing) for enhanced grip and a more textured visual effect, or a straight pattern (2 mm spacing) for a clean and classic presentation. Back sealing is pattern-free, producing a neat, uncluttered finish.

Liquid-Oriented Leak-Proof Sealing Option

For liquid applications, the horizontal sealing can be configured with a 1 mm leak-proof line to strengthen seal reliability and reduce the risk of seepage during storage, handling, and transportation.

Independent Cutter with Optional Edge Styles

Equipped with an independent cutting structure, the machine supports flat cut or serrated cut, allowing manufacturers to choose the pouch edge style that best fits product positioning, consumer opening experience, and secondary packing needs. Cutter spacing is designed for stable, repeatable cutting performance.

Wide Product Compatibility

Compatible with liquid, powder, and particle packaging, the system supports diverse industries using composite packaging materials to improve barrier properties and help protect product quality and shelf life.

Technical Specifications

Item Specification
Machine Name Back Sealing Strip Packaging Machine
Type Automatic
Control System PLC Control
Packaging Film Composite Packaging Material
Bag Pulling Method Variable Frequency Motor Crank Structure; Heat Sealed Bag Pulling
Horizontal Sealing Width 8–10 mm; Diagonal Mesh Pattern (1 mm spacing) or Straight Pattern (2 mm spacing)
Back Sealing Width 5–10 mm; No Pattern
Horizontal Sealing Leak-Proof Line 1 mm (only applicable to liquid packaging)
Cutting Method Flat Cut or Serrated Cut (independent cutter); 3 mm spacing between cutters
Sealing Form Twisted Edge Adhesive Sealing
Packaging Type Liquid; Powder; Particles
Measurement Accuracy ±1–10% (depending on packaging materials and quantity)
Machine Weight 350 kg
Warranty 1 Year

Application Areas

Food and Ingredient Packaging

Suitable for packaging powdered ingredients such as flour and mixes, as well as granulated products including seasonings, dry blends, and food additives. Stable film handling and consistent sealing support neat presentation and dependable storage performance.

Liquid Pouch Packaging

Ideal for pouch-style packaging of liquid products that require reliable sealing integrity. The optional horizontal sealing leak-proof line helps enhance seal strength and supports stable, repeatable liquid packaging results.

Daily Chemical and General Industrial Products

Applicable to a broad range of liquid, powder, and particle products in daily chemical and general industrial segments. Composite film compatibility, clean back sealing, and flexible cutting and sealing textures help manufacturers adapt packaging appearance and functionality to different markets and channel requirements.

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