Six-row Granule Back-seal Sachet Packaging Machine

A back-seal packaging machine is an automated system that forms, fills, and seals pouches by creating a seal along the center of the pouch back, leaving the front smooth for branding. It delivers high speed, consistent bag quality, and precise fill control for powders, granules, liquids, or solids.

The film is unwound and formed into a tube around a filling tube; after product dosing, sealing jaws compress the film at the back center, creating a back seal. The machine then cuts the filled pouch apart and advances film for the next cycle, ensuring continuous operation.

Back-seal machines handle a wide range of flexible films—such as polyethylene (PE), polypropylene (PP), laminated barrier films, and biodegradable plastics—provided they have adequate heat-seal properties and thickness (typically 40–150 μm).

Back-seal packaging machines offer rapid pouch making (up to 120 bags/min), minimal film waste, precise fill accuracy (±0.5 %), and a clean front surface ideal for eye-catching graphics and labeling.

These machines are widely adopted in food (snacks, sugar, coffee), pharmaceuticals (powdered drugs, supplements), chemicals (detergents, fertilizers), and consumer goods (spoon-able products, hardware components).

Schedule daily cleaning of sealing jaws and film paths, lubricate bearings weekly, inspect heaters and sensors monthly, and replace worn sealing bars or belts every 6–12 months to prevent downtime.

Selecting the appropriate filling machine involves considering several factors:

• Product Characteristics: Understand your liquid’s viscosity, presence of particulates, and foaming properties. For instance, thicker products may require piston fillers, while free-flowing liquids might be suitable for gravity fillers.

• Production Volume: Determine your daily or hourly production targets to decide between semi-automatic and fully automatic machines. Higher volumes typically benefit from automation.

• Container Specifications: Consider the sizes and shapes of your containers. Ensure the machine can accommodate various dimensions and has quick changeover capabilities if you use multiple container types.

• Budget and Future Growth: Align your investment with your current budget while considering scalability for future expansion. Opt for machines that can adapt to increased production demands.

• Wrinkled seals: Check film tension and adjust nip rollers.

• Incomplete seals: Ensure seal bar temperature and pressure are correct.

• Misfeeds: Clean sensor lenses and verify film tracking guides.

Depending on model and product viscosity, most back-seal packaging machines run between 30 and 120 pouches per minute, with fill volumes ranging from 5 mL up to 5 L per cycle.

Consider your product type (powder, liquid, granule), desired output rate, pouch size range, film compatibility, and available footprint; request demonstrations to verify fill accuracy and seal integrity under your operating conditions.

Look for emergency-stop buttons, safety light curtains, interlocked access doors, overheat protection on seal bars, and CE/UL certifications to ensure operator safety and compliance with international standards.