METHOD FOR OBTAINING THREE-DIMENSIONAL STRUCTURE AND ELEMENTARY THREAD OF THREE-DIMENSIONAL PRINTER Russian patent published in 2021 - IPC B29C64/118 B33Y70/00 D02G3/04 

FIELD: three-dimensional printing.

SUBSTANCE: method for obtaining a three-dimensional structure is provided, including melting and deposition using a three-dimensional printer of an elementary thread containing mixed yarn and a reinforcing element for mixed yarn. Mixed yarn contains continuous reinforcing fiber (A) and continuous fiber (B) made of thermoplastic resin. The dispersion of continuous reinforcing fiber (A) in mixed yarn is from 60 to 100%, and the reinforcing element is fiber (C) made of thermoplastic resin. Mixed yarn is applied to at least part of the surface of fiber (C) made of thermoplastic resin, or fiber (C) made of thermoplastic resin and mixed yarn are entangled in the elementary thread. The difference between the melting point of thermoplastic resin (B) and the melting point of fiber (C) of thermoplastic resin is 50°C or less.

EFFECT: obtaining a three-dimensional structure with fewer internal voids or bubbles.

14 cl, 6 dwg, 3 tbl, 9 ex