Select the appropriate type and brand of defoamer based on the specific requirements and production process of polyurethane products. Determine the amount of addition and determine the optimal amount through experiments to avoid negative effects caused by excessive use. Add timely during the mixing or reaction process of polyurethane raw materials to ensure defoaming effect, and ensure that the defoamer is fully and evenly mixed with the polyurethane raw materials to improve defoaming efficiency.

Check if the amount of defoamer added is sufficient, or try replacing it with a more efficient defoamer. If the defoamer is incompatible with the polyurethane system, a product with good compatibility should be replaced in a timely manner. Select environmentally friendly defoamers to ensure that the production process complies with environmental regulations. Reasonably control the cost of using defoamers and improve economic benefits while ensuring the defoaming effect.

Polyurethane defoamers should ensure good container sealing during storage to prevent the defoamers from evaporating or absorbing moisture. Avoid direct sunlight to prevent the defoamer from undergoing photochemical reactions. Store in a cool, ventilated, and dry environment to avoid the impact of high or low temperatures on the performance of defoamers. Defoamers are mostly flammable or combustible substances and should be kept away from sources of fire and heat.

When selecting defoamers for polyurethane, it is necessary to choose defoamers with efficient defoaming and long-lasting foam suppression properties based on the characteristics and production requirements of the polyurethane system. Ensure that the selected defoamer has good compatibility with the polyurethane system and will not have a negative impact on product performance. Prioritize the use of environmentally friendly defoamer products to reduce pollution to the environment. Taking into account factors such as price, dosage, and effectiveness of defoamers, choose products with high cost-effectiveness. Choose manufacturers or brands with good technical support and after-sales service to obtain timely technical support and solutions during use.

In summary, defoamers for polyurethane play a crucial role in the production process of polyurethane products. By rational selection and scientific use, product quality and production efficiency can be effectively improved, meeting the market's demand for high-quality polyurethane products.