US 9,808,990 B2
Method for printing three-dimensional items wtih semi-crystalline build materials
Luke M. B. Rodgers, Chaska, MN (US); and Vittorio L. Jaker, New Brighton, MN (US)
Assigned to Stratasys, Inc., Eden Prairie, MN (US)
Filed by Stratasys, Inc., Eden Prairie, MN (US)
Filed on May 27, 2015, as Appl. No. 14/723,330.
Application 14/723,330 is a continuation in part of application No. 14/532,465, filed on Nov. 4, 2014, granted, now 9,527,242.
Application 14/532,465 is a continuation of application No. 14/077,703, filed on Nov. 12, 2013.
Application 14/077,703 is a continuation in part of application No. 13/833,526, filed on Mar. 15, 2012, granted, now 9,592,530.
Claims priority of provisional application 61/909,611, filed on Nov. 27, 2013.
Claims priority of provisional application 61/729,043, filed on Nov. 21, 2012.
Prior Publication US 2015/0251353 A1, Sep. 10, 2015
Prior Publication US 2017/0225394 A9, Aug. 10, 2017
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 41/02 (2006.01); B29C 67/00 (2017.01); G03G 15/22 (2006.01); B33Y 10/00 (2015.01); B29K 105/00 (2006.01); B29C 71/00 (2006.01); B29K 71/00 (2006.01); B29K 79/00 (2006.01); B29C 71/02 (2006.01); B33Y 70/00 (2015.01)
CPC B29C 67/0055 (2013.01) [B29C 67/0059 (2013.01); B29C 67/0077 (2013.01); B29C 67/0081 (2013.01); G03G 15/224 (2013.01); B29C 71/0063 (2013.01); B29C 2071/022 (2013.01); B29K 2071/00 (2013.01); B29K 2079/085 (2013.01); B29K 2105/0002 (2013.01); B29K 2995/004 (2013.01); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); G03G 15/225 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for printing a three-dimensional part with an additive manufacturing system, the method comprising:
providing a consumable feedstock material comprising a semi-crystalline polymer containing one or more secondary materials wherein compositionally the consumable feedstock material is substantially uniform, wherein the consumable feedstock material has a process window in which crystalline kinetics are retarded utilizing a sufficient amount of the one or more secondary materials to be added to the build material such that an enthalpy of the build material with the secondary material is between about 2 J/g heat of fusion and about 80% of the heat of fusion of the build material that is compositionally about 100% of the semi-crystalline build material, as measured by differential scanning calorimetry (DSC) when cooling from the melting temperature to the hot crystalline temperature at a rate of 10° C./min;
melting the consumable feedstock material in the additive manufacturing system; and
forming at least a portion of the three-dimensional part from the melted consumable feedstock material in a build environment maintained within the process window.