When seeds are coated with polyvinyl alcohol (PVOH), they are protected by a PVOH film, where the water solubility and mechanical strength of the film can be controlled. Polyvinyl alcohol coatings decrease dusting, improve germination and can be applied in a variety of ways. PVOH is used as a binder for seed coating. Seed coating is the process of applying materials like agrochemical or fertilizer to the natural seed surface. This technology is used for improving physical properties of the seed and the delivery of active ingredients.
Polyvinyl alcohol is used for improving soil structure and soil fertility. The polyvinyl alcohol can be either be mixed into the soil or sprayed onto the soil as a solution. The goal is to create a crumb structure to the soil, like this the roots can penetrate the soil more easily. With a crumb structure some parameters are improved, creating a good environment for soil organisms. These include water retention, drainage and good air permeability.
Fertilizer/ agrochemical binder
Polyvinyl alcohol is commonly used as a binder in fertilizer formulations. It can be applied as a solution or in powder form. The goal is to accelerate the aggregation of ingredients, and granulation speed, yields and physical properties of the granules (for example release control and water retention properties).
- Inherently biodegradable
- Good film formation
- Water retention & release control
- Low-dust off properties
- Improved germination