US 12,214,545 B2
Three-dimensional printing method
Fuke Wang, Singapore (SG); and Fei Wang, Singapore (SG)
Assigned to AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, Singapore (SG)
Appl. No. 17/610,729
Filed by AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, Singapore (SG)
PCT Filed Apr. 30, 2020, PCT No. PCT/SG2020/050260
§ 371(c)(1), (2) Date Nov. 12, 2021,
PCT Pub. No. WO2020/231329, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 10201904398P (SG), filed on May 15, 2019.
Prior Publication US 2022/0219385 A1, Jul. 14, 2022
Int. Cl. B29C 64/124 (2017.01); B29K 33/00 (2006.01); B29L 31/00 (2006.01); B33Y 10/00 (2015.01); B33Y 70/10 (2020.01); B33Y 80/00 (2015.01); C08L 33/08 (2006.01); C08L 33/10 (2006.01)
CPC B29C 64/124 (2017.08) [C08L 33/08 (2013.01); C08L 33/10 (2013.01); B29K 2033/08 (2013.01); B29L 2031/7536 (2013.01); B33Y 10/00 (2014.12); B33Y 70/10 (2020.01); B33Y 80/00 (2014.12)] 17 Claims
OG exemplary drawing
 
1. A method of three-dimensional printing an object having a varying degree of transmissivity to light along an axis of said object, the method comprising the steps of:
(a) providing a liquefied polymer resin having a plurality of particles therein, wherein said particles have densities in a range of 3 g/cm3 to 12 g/cm3, said particles being distributed in said liquefied polymer resin based on the density of said particles; and
(b) polymerizing said liquefied polymer resin to form said object layer-by-layer by exposing each layer to light.