Recycling Pure Water Bags (Water Sachets) is one of the most profitable businesses in Nigeria today, especially around Lagos, Kano, and Onitsha. But many recycling plant owners face a painful reality. You spend heavily on buying baled waste, pay for labor and washing, and waste expensive diesel running your generators, only to get finished pellets that look like spongy popcorn. These granules are completely hollow inside, full of air bubbles, and they snap easily during production.

When you take these bad pellets to the market, downstream buyers will reject your materials immediately. Film blowing factories cannot use them because the trapped air causes constant film breakage on their blowing machines. Producing hollow granules means you are operating at a loss, losing your market reputation, and burning your costly diesel without making any clean profit.

To understand this quality disaster, you must look at the washing stage. Water sachets have a large surface area, meaning they hold a massive amount of surface moisture after crushing and washing. Because electricity from the grid is unstable and running a heavy drying line costs too much diesel, many local workshops skip the drying process entirely. Workers shovel these dripping wet plastic flakes straight into the granulator hopper, hoping the high heat inside the barrel will naturally dry the material.

This is a dangerous shortcut. When water-soaked flakes enter the heating barrel at over 200°C, the water explodes into superheated steam instantly. Since a standard single-stage extruder barrel is completely sealed, this heavy steam has nowhere to go. It is forced to mix directly with the molten plastic. When the plastic exits the mold and hits the cooling water, the trapped steam expands and collapses, leaving your finished pellets full of bubbles and structural weakness.

Fixing this problem requires a smart adjustment that fits the reality of a Nigerian factory. First, you must install a heavy-duty, high-speed centrifugal dewatering machine right before your granulator feeding mouth. But do not just buy any standard machine. Local water sachets often carry sand and residual dirt that block standard mesh screens within hours.

You need a dewatering machine equipped with a dynamic self-cleaning rotor and reinforced stainless steel screens. This system strips away over 95% of surface moisture within seconds using pure mechanical force. To save on your energy bills, you can use a gravity-fed buffer silo with bottom air vents right after the dewatering stage. This allows the material to flash-dry naturally using Nigeria’s ambient tropical heat, ensuring only dry plastic enters your screw.

If you want to eliminate manual mistakes completely, the permanent solution is upgrading to a specialized Two-Stage (Mother-Baby) Granulator System. A standard single screw compresses the material too quickly, locking the steam inside. Our engineered recycling extruder uses a multi-stage screw with a dedicated decompression zone exactly where the plastic melts. This design drops the internal pressure, allowing a high-efficiency vacuum degassing vent to draw out all trapped water vapor and gases before they travel down the barrel.

Many local recyclers complain that vented extruders always leak molten plastic from the gas holes when processing light water sachet materials. To solve this, our machine is fitted with a screw-driven forced feeding cleat inside the vent stack. This mechanical system pushes any rising molten plastic back into the barrel while letting the water steam escape freely into the air.

The final step to making high-profit pellets happens in the secondary baby extruder. Once the water vapor is removed, the plastic melt becomes much more dense. Our secondary extruder runs at a slightly lower, precisely controlled temperature profile to compress the polymer matrix before it passes through a hydraulic non-stop screen changer.

This intense compression packs the plastic tightly, forcing out any microscopic air pockets. The resulting extruded strands are perfectly solid, heavy, and clean. You will produce high-density granules that command the highest premium prices from international packaging buyers in Nigeria, giving you the maximum financial return on your daily diesel investment.