For any manufacturer involved in producing rigid polyurethane foam, a deep understanding of polyol specifications is essential for achieving desired product properties and ensuring efficient production processes. At NINGBO INNO PHARMCHEM CO.,LTD., we recognize that clarity on these technical details is crucial for our clients when they choose to buy polyols. As a dedicated chemical manufacturer and supplier, we aim to provide the highest quality materials that meet stringent industry standards.

The performance of rigid polyurethane foam, particularly in insulation applications for construction and appliances, is heavily dependent on the polyol's characteristics. Among the most critical specifications are the hydroxyl value and viscosity. The hydroxyl value, typically measured in mgKOH/g, indicates the reactive hydroxyl groups present in the polyol. For rigid foams, a hydroxyl value in the range of 170-220 mgKOH/g is common, as it contributes to the high cross-linking density required for a rigid structure and excellent thermal insulation. Our two-component polyurethane rigid foam spray blend polyols are precisely formulated to fall within this effective range.

Viscosity, measured in centipoise (CPS) at a specific temperature (e.g., 25°C), is also a vital parameter, especially for spray foam applications. A viscosity in the range of 800-1200 CPS/25°C is often preferred to ensure optimal sprayability, atomization, and coverage. This allows the foam to be applied evenly and efficiently, filling cavities without excessive sagging or uneven distribution. Low viscosity might lead to poor cell structure, while excessively high viscosity can make processing difficult.

Furthermore, the acid value, which should ideally be low (<2 mgKOH/G), and moisture content (<0.15%) are critical for preventing unwanted chemical reactions during the foaming process. High acid values can catalyze side reactions, and excess moisture can lead to CO2 generation, potentially creating foam defects or compromising mechanical properties. Ensuring these parameters are within specified limits is a hallmark of quality polyols.

NINGBO INNO PHARMCHEM CO.,LTD. prides itself on being a direct factory manufacturer, which means we maintain strict quality control over all our product specifications. This commitment ensures that when you buy polyols from us, you receive materials that are consistent, reliable, and perform as expected in your rigid foam production. We are a leading chemical supplier prepared to meet your bulk order requirements with competitive pricing and dedicated support.

For manufacturers seeking dependable polyols that meet precise specifications for rigid foam production, NINGBO INNO PHARMCHEM CO.,LTD. is your ideal chemical supplier and manufacturer. We are committed to delivering excellence in both product quality and customer service. Reach out to us today to discuss your specific needs and obtain a quote for your next order.