In the NPK fertilizer production line, coating and packaging are the final key processes that directly affect the market image and usage effect of the product.
After drying and screening, qualified fertilizer particles first enter the coating process. The main purpose of encapsulation is to form a protective film on the surface of particles, preventing them from absorbing moisture and clumping during storage and transportation, while also delaying the release rate of fertilizer nutrients and improving fertilizer utilization efficiency.
Common coating materials include paraffin, resin, etc. In the coating device, fertilizer particles are evenly sprayed with coating material. By precisely controlling the spraying amount and coating time, ensure that each fertilizer receives a suitable thickness of coating. During the coating process, attention should be paid to parameters such as temperature and stirring speed to ensure that the coating material adheres uniformly to the surface of the particles..jpg)
After the NPK fertilizer production line completes the coating, the fertilizer particles can be packaged. The packaging process begins with measurement, using automatic measuring equipment to pack fertilizers into packaging bags according to the specified weight. The measurement accuracy requirement is very high to ensure that the weight of each bag of fertilizer is accurate and meets market sales standards.
Packaging bags are generally made of plastic woven bags or composite bags, which have good moisture-proof and insect proof properties. The bagged fertilizer is sealed by a sealing machine to ensure that the packaging bag is tight and leak free.
On the packaging, important information such as the product name, ingredients, nutrient content, production date, and shelf life will be clearly labeled. These labels are not only convenient for consumers to understand the product, but also an important basis for product quality traceability.
Some high-end NPK fertilizer products also have a layer of exquisite paper boxes wrapped around the packaging to enhance the product’s grade and market competitiveness.
After being coated and packaged, NPK fertilizers are neatly stacked in warehouses, waiting to be transported to agricultural markets across the country, providing strong nutrient support for agricultural production and completing the mission journey from NPK fertilizer production lines to fields.