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Digitally-controlled three-dimensional printing of polymerizable materials

a technology of polymerizable materials and digital control, applied in printing, inks, manufacturing tools, etc., can solve the problems of narrowing the choice of materials and chemical reactions that can be utilized in this technology

Inactive Publication Date: 2018-02-01
STRATASYS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention describes a method for inkjet printing objects using chemical compositions that form the building material when cured. This method allows for the creation of objects with different chemical compositions in different areas, resulting in different properties at a detailed level. The method can produce printed objects with changing or continuous properties in different areas.

Problems solved by technology

Until today, most 3D inkjet methodologies have utilized photopolymerizable materials, and photo-induced curing, typically UV curing, thus narrowing the choice of materials and chemical reactions that can be utilized in this technology.

Method used

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  • Digitally-controlled three-dimensional printing of polymerizable materials
  • Digitally-controlled three-dimensional printing of polymerizable materials
  • Digitally-controlled three-dimensional printing of polymerizable materials

Examples

Experimental program
Comparison scheme
Effect test

example 1

Polyamide-Forming Materials

[0451]Materials:

[0452]A caprolactam monomer and a catalyst for anionic ring opening polymerization (ROP), were obtained from Bruggerman, in accordance with a monomer and a catalyst used for preparing NYRIM® products.

[0453]The monomer and catalysts were mixed to form composition A (an exemplary first composition according to some embodiments of the present invention).

[0454]A caprolactam activator used for preparing NYRIM® products, was also obtained from Bruggerman. The caprolactam activator is 1,3-Benzenedicarbonyl dichloride, polymer with 2-methyloxirane polymer with oxirane ether with 1,2,3-propanetriol (3:1), caprolactam-terminated; otherwise referred to as Polyoxypropylene-polyoxyethylene-block copolymer isophthalic acid biscaprolactam ester; CAS No. 718612-97-6; C20H24N2O4·[C3H8O3·3(C3H6O·C2H4O)x], the chemical structure of which is shown below:

wherein R is:

wherein k is approx. 23 and j is approx. 5.

[0455]The polymer has Mn of 10,485 Da; and Mw of 27,...

example 2

Polyamide-Forming Materials

[0462]Materials:

[0463]Table 3 below presents materials usable for forming polyamide materials while using a method as described herein.

TABLE 3Trade name / ChemicalCompoundFunctionCompositionSourceε-CLCurableAP-NYLON ® CaprolactamBruggemannmonomerKGε-CLECurableε-Caprolactone; Capa ™Perstorpmonomer / MonomerImpactmodifierC10CurableBRUGGOLEN ® C10BruggemannMonomer +(about 17-18% of NaCL inKGcatalystε-CL)C20CurableBruggolen ® C20PBruggemannMonomer +(about 80% of ε-CL blockedKGactivatorHDI in ε-CL)BruggolenTPActivatorBruggolen TP C-1312BruggemannC-1312(PPG / PEG based highKGmolecular weight ε-CLblocked isocyanatemacroactivator)LLCurableLaurolactamSigma-monomer(12-Aminododecanolactam,Aldrich98%)PDLCurableω-Pentadecalactone, ≧98%Sigma-monomerAldrichPEI FGImpactLupasol ® FGBASFmodifier / (polyethyleneimine, aboutamine800 g / mol, 99%)boosterPEI PR8515ImpactLupasol ® PR8515BASFmodifier / (polyethyleneimine, aboutamine2000 g / mol, 99%)boosterPEI WFImpactLupasol ® WFBASFmodifier / ...

example 3

Exemplary Process

[0488]Post-process treatment:

[0489]The present inventors have uncovered that following a 3D inkjet printing process of polyamide-forming compositions, the obtained cured material is not fully polymerized, and typically exhibits a relatively low HDT of about 40-50° C.

[0490]In order to achieve higher HDT values, thermal post process is required in order to complete the polymerization and obtain cured material featuring HDT of 150° C.

[0491]For example, the present inventors have successfully practiced a thermal post-process curing for 1 hour at 150° C.

[0492]In order to monitor polymerization completion, weight loss upon the post-process thermal treatment was measured. Weight of the cured material was measured prior to and following thermal post process.

[0493]A minimum weight loss during post-process (e.g., of about 1.5-2.5% by weight), is indicative of a successful printing and of obtaining a printed object with mechanical properties identical to those polymerized in m...

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Abstract

Provided are methods of fabricating an object, effected by jetting two or more different compositions, each containing a different material or mixture of materials, which, when contacted on a receiving medium, undergo a chemical reaction therebetween to form the building material. The chemical composition of the formed building material is dictated by a ratio of the number of voxels of each composition in a voxel block. Systems for executing the methods, and printed objects obtained thereby are also provided.

Description

FIELD AND BACKGROUND OF THE INVENTION[0001]The present invention, in some embodiments thereof, relates to three-dimensional printing and, more particularly, but not exclusively, to methods of performing three-dimensional inkjet printing, to compositions utilized in these methods and to objects obtained by these methods.[0002]Three-dimensional (3D) inkjet printing is a known process for building three dimensional objects by selectively jetting chemical compositions, for example, polymerizable compositions, via ink-jet printing head nozzles, onto a printing tray in consecutive layers, according to pre-determined image data. 3D inkjet printing is performed by a layer by layer inkjet deposition of chemical compositions. Thus, a chemical composition is dispensed in droplets from a dispensing head having a set of nozzles to form layers on a receiving medium. The layers may then be cured or solidified using a suitable methodology, to form solidified or partially solidified layers of the bu...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B29C64/112B41J2/01B33Y70/00B33Y10/00B33Y30/00C09D11/30B29C64/393
CPCB29C64/112C09D11/30B41J2/01B29C64/393B33Y10/00B33Y30/00B33Y70/00B33Y50/02C09D11/101
Inventor MATZNER, EYNATYUDOVIN-FARBER, IRAHIRSCH, SHAIKUNO, LEV
Owner STRATASYS LTD