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XF-270; XF-B-3; XF-B-4;
The XINFA Polyester Polyol Coating Agent is an advanced, reactive liquid resin engineered specifically for the production of polyurethane-coated controlled-release fertilizers. Presenting as a light yellow to brownish-yellow viscous liquid, this agent reacts seamlessly with isocyanates to form a highly durable, ultra-thin protective shell around fertilizer granules, such as urea. By transitioning from traditional coating methods to our specialized polyurethane system, fertilizer manufacturers can achieve superior nutrient management and structural integrity.
Polyurethane-coated films have distinct advantages over other coating materials in controlled-release fertilizers, such as a significantly thinner thickness, shorter degradation time, lower material cost, and better environmental degradability. These characteristics make our polyester polyol coating agent exceptionally competitive and highly suitable for large-scale field applications, ensuring that modern agricultural operations can maximize yield while minimizing ecological impact.
Implementing our polyester polyol in your fertilizer production line brings a multitude of operational and agronomic benefits. Specifically, the advantages of our polyurethane-coated films include:
Polyurethane-coated films can achieve a remarkably thinner thickness without compromising structural integrity. The resulting shell exhibits outstanding resilience and wear resistance, maintaining a smooth, tactile finish that prevents granule breakage during rigorous processing, bagging, and transportation. For example, a fertilizer technology article pointed out that the coating film thickness of Maoshi polyurethane controlled-release fertilizer is only one-third of that of similar products in Japan, which directly reduces raw material consumption and production costs.
The dense, uniform polyurethane matrix provides a highly controlled barrier against moisture penetration. This ensures a steady, precise, and flat nutrient release curve that can be meticulously adjusted to match the specific growth cycles of varied crops. Improved nitrogen utilization efficiency is a direct result: polyurethane-coated fertilizer can reduce nitrogen volatilization and leaching, improving utilization efficiency and reducing environmental pollution in surrounding water systems.
Formulated with an optimized hydroxyl value and moderate reaction activity, this polyol integrates smoothly with various isocyanates. Its adaptable viscosity ensures excellent spreadability over fertilizer granules inside the coating drum. This high processing compatibility means it can be rapidly deployed into existing large-scale fertilizer production lines with minimal equipment modifications, ensuring efficient, continuous output.
Due to the reduction in coating film thickness and the improvement in degradability, polyurethane-coated films have advantages in reducing production costs, making the large-scale application of controlled-release fertilizers possible. According to Maoshi fertilizers, Maoshi polyurethane controlled-release fertilizer technology is at the world-leading level in this regard, allowing manufacturers to scale operations profitably.
Polyurethane-coated films have a shorter degradation time in soil, reducing environmental residues and negative impacts. As a vegetable oil-based formulation, these polyurethane-coated films have good degradability, significantly reducing environmental pollution. Once the nutrient release cycle concludes, the residual shell breaks down efficiently, aligning with stringent international agricultural and environmental sustainability standards.
In summary, polyurethane-coated films have significant advantages in the field of controlled-release fertilizers, making them a promising coating material choice for forward-thinking agricultural suppliers.
To accommodate diverse production requirements and equipment setups, we offer multiple grades of our biodegradable resin. Each variant is rigorously tested to ensure optimal hydroxyl values, minimal acid presence, and precise viscosity for flawless fertilizer coating. Please refer to the exact parameters below to select the right specification for your formulation needs.
Specification | XF-270 | XF-B-3 | XF-B-1 |
Appearance | Light yellow to brownish yellow transparent liquid | Light yellow to brownish yellow transparent liquid | Light yellow to brownish yellow transparent liquid |
Hydroxyl value，mgKOH/g | 260±10 | 300±30 | 370±20 |
Acid value，mgKOH/g | 3±0.2 | ≤3.0 | ≤3.0 |
Moisture content，% | ≤0.1 | ≤0.15 | ≤0.15 |
Viscosity，mPa·s（25℃） | 3000±500 | 3000±500 | 3500±500 |
Uses | This product is a biodegradable resin, suitable for fertilizer coating. | This product is a biodegradable resin, suitable for fertilizer coating. | This product is a biodegradable resin, suitable for fertilizer coating. |
Packaging, storage and transportation | Packed in iron drums, net weight 200kg per drum. | Packed in iron drums, net weight 200kg per drum. | Packed in iron drums, net weight 200kg per drum. |
Securing a reliable supply chain and consistent material performance is critical for continuous fertilizer manufacturing. We back our polyester polyol coating agents with robust infrastructure and dedicated engineering support to ensure your operations run smoothly.
