摘要
采用无溶剂喷涂成型法制备了聚氨酯包膜缓释肥，讨论了喷涂比例对包膜量和耐磨性的影响以及不同包膜量对缓释性能的影响。结果表明，聚氨酯预聚体与扩链剂的喷涂比例为7.50∶1、实际包覆量为7.23％时，包膜缓释肥的初溶率范围在10.00％～12.50％、微溶率范围在1.80％～2.40％，包膜效果最好；包覆肥颗粒的表面光滑度、均匀度和耐磨性能好，优于日本产包膜肥。
Polyurethane coated slow release fertilizer was prepared with solvent free spraying. Influence of spra-ying proportion on coating amount, wear resistance of enveloped fertilizer and coating amount on slow release per-formance were discussed. The results showed that coating effect was the best when spraying proportion of polyure-thane prepolymer and chain extender was 7.40∶1 , the coating amount was 7.23%, the initial solubility of slow re-lease fertilizers was 10.0% to 12.5%, the slightly solubility was 1.8% to 2.4%. Coated fertilizer particle surface was smooth, evenness and wear resistance was better than the coated fertilizer in Japan.
出处
《聚氨酯工业》
2014年第2期33-36,共4页
Polyurethane Industry
关键词
聚氨酯
包膜
缓释肥
耐磨性
polyurethane
coated
slow released fertilizer
wear resistance
