And the best effects was using the reinforcing agent as the 5% of the total quality of urea,and the best charge method was putting with the second putti...

• 通过进一步研究发现,增强剂用量在尿素总质量的5%25时效果较好,增强剂的投料方式采用随第2次甲醛、第2次尿素同时加入为宜。