Preparation Method of Polyurethane Controlled-Release Fertilizer
Release Date:
2019-11-15
Have you heard of polyurethane‑coated controlled‑release fertilizers? Some farmers who grow crops may be somewhat familiar with them. But do you know how these fertilizers are manufactured? Below, our editor from a controlled‑release fertilizer manufacturer will provide a brief overview:
Preparation Method of Polyurethane Controlled-Release Fertilizer
Have you heard of polyurethane‑coated controlled‑release fertilizers? Some farmers who grow crops may be somewhat familiar with them. But do you know how these fertilizers are manufactured? Next, … Controlled-release fertilizer The manufacturer’s editor will briefly introduce it to everyone:
1. Place the granular fertilizer in a horizontal rotary drum equipped with several lifting plates for preheating.
2. The raw materials comprising the polyurethane coating solution are dripped or injected onto the fertilizer surface via a nozzle to form a preliminary coating.
3. Simultaneously apply the raw materials of the polyurethane coating solution onto the pre-coated layer of the granular fertilizer; after the polyurethane coating solution has cured, repeat the coating process 2 to 10 times.
And so, the polyurethane‑coated controlled‑release fertilizer was produced. It may sound straightforward, but the intricate manufacturing process is far from something that can be explained in a few short words.
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