1kg Salt Packaging Machine Case in Tunisia – Anti-Corrosion Design with Measuring Cup Dosing and PE Film

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Customer Requirements

Why Salt Packaging Requires Anti-Corrosion Design

Salt packaging is different from sugar, rice, beans, or other common granules. Salt can be corrosive, especially when the production environment has humidity or when salt dust remains on machine surfaces for a long time.

If the machine is not properly designed, long-term salt packaging may cause:

• Corrosion on product contact surfaces

• Faster wear of exposed metal parts

• Salt dust accumulation around dosing and forming areas

• Difficult cleaning after production

• Reduced service life of key parts

• Possible contamination risk if corrosion is not controlled

For this Tunisia project, Samfull did not treat salt as a standard granular product. Instead, the machine was customized with anti-corrosion protection for the salt contact area.

Teflon Coating on Product Contact Parts

One of the key technical points of this project is that the product contact parts were sprayed with Teflon coating.

Teflon coating helps improve machine performance in salt packaging because it provides:

1. Better corrosion resistance

The coating creates a protective layer between salt and the metal surface, helping reduce direct salt corrosion during long-term production.

2. Lower material adhesion

Salt particles and salt dust are less likely to stick strongly to coated surfaces, making production smoother and cleaning easier.

3. Easier cleaning after production

For salt packaging factories, daily cleaning is important. Teflon-coated contact parts help operators remove salt residue more easily.

4. Longer service life of contact parts

By reducing direct corrosion and residue accumulation, the coated parts can support more stable long-term operation.

5. More suitable for humid environments

In some coastal or humid markets, salt can absorb moisture more easily. Anti-corrosion treatment becomes especially important for long-term machine reliability.

Why Measuring Cup Dosing Was Selected for 1kg Salt

The customer’s salt product had good flowability and relatively stable bulk density. Therefore, a measuring cup dosing system was selected.

For 1kg salt packaging, measuring cup dosing offers:

• Simple mechanical structure

• Easy volume adjustment

• Stable filling for free-flowing salt

• Lower maintenance cost than complex weighing systems

• Better cost-performance for standard 1kg retail bags

• Suitable for continuous medium-scale production

For projects requiring higher weighing accuracy, a linear weigher or multihead weigher can also be used. But for this customer’s 1kg salt application, the measuring cup dosing system was more practical and economical.

Machine Configuration

The machine was configured according to the customer’s 1kg salt bag size and PE film material. Since PE film is softer than laminated film, the machine required stable film pulling, accurate sealing temperature control, and reliable end sealing strength.

layout drawing of 1kg Salt Packaging Machine

Bag Size Reference

For 1kg salt bags, sealing strength is very important because each bag must withstand product weight, stacking, handling, and transportation.

PE Film Packaging Technical Points for 1kg Salt

PE film is widely used for economical salt packaging, but it requires careful machine adjustment.

Stable sealing temperature

PE film is sensitive to heat. If the temperature is too low, the seal may be weak. If the temperature is too high, the film may deform or stick to the sealing jaws.

Strong back seal and end seal

Each bag contains 1kg of salt, so the back seal and end seal must be strong enough for transportation and storage.

Smooth film pulling

Stable film pulling helps maintain consistent bag length and reduces bag deviation during continuous operation.

Static elimination

PE film may generate static electricity during operation. Static elimination helps improve film running stability and reduce film adhesion problems.

Anti-corrosion cleaning routine

Even with Teflon coating, regular cleaning is still important. Salt residue should be removed after production, especially around the measuring cup, hopper, forming area, sealing area, and machine surfaces exposed to salt dust.

Production Capacity

Each machine was designed to run at approximately 25–28 bags per minute.

This capacity is suitable for salt producers, food packaging factories, local distributors, and contract packaging companies in Tunisia.

Why the Tunisia Customer Chose Samfull

The Tunisia customer needed a practical 1kg salt packaging solution that could balance cost, speed, and long-term reliability.

Samfull provided a customized solution based on the actual production requirements:

• 1kg salt packaging

• PE film material

• Measuring cup dosing system

• Back seal pillow bag format

• 25–28 bags/min speed requirement

• Teflon coating on product contact parts

• Anti-corrosion design for salt packaging

• Chinese / English / French machine interface

• 2-machine production arrangement

This case shows that Samfull does not simply use a standard granular packaging machine for every product. For corrosive materials such as salt, the machine structure, contact parts, coating treatment, cleaning convenience, and long-term durability must all be considered.