| 摘要 |
Seeded particle of polyamide (PA) powder comprises shell and core polyamide, where the polyamide core and shell is identical natural polyamide but molecular weight of natural polyamide is different. Independent claims are included for: (1) a preparation of the powder comprising anionic polymerization in a dissolved solvent, where the polymerization of lactam 6, lactam 12 or their mixture is performed in the presence of a catalyst, an activator of at least a amide containing N, N'-alkylene bis amide and an organic filler; and (2) a use of the powder for manufacturing objects by agglomeration of the powder by melting caused by radiation of laser, IR or UV radiation. |
