Three-dimensional printing

Patent metadata

Field	Value
Publication number	US-12384107-B2
Application number	US-201917417080-A
Country	US
Kind code	B2
Filing date	Jul 15, 2019
Priority date	Jul 15, 2019
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

An example of a kit for 3D printing includes a build material composition and a fusing agent to be applied to at least a portion of the build material composition during 3D printing. The build material composition of the kit includes a polyamide 6,13 material, a phosphorus-containing antioxidant, and a sulfur-containing antioxidant, or a polyamide 6 material, the sulfur-containing antioxidant, and a phenolic antioxidant. The fusing agent includes a radiation absorber to absorb radiation to melt or fuse the build material composition in the at least the portion.

First claim

What is claimed is:

1. A kit for three-dimensional (3D) printing, comprising:
a build material composition including:
a polyamide 6,13 material;
a phosphorus-containing antioxidant including tris(2,4-ditert-butylphenyl) phosphite or a phosphonate-based antioxidant; and
a sulfur-containing antioxidant including dilauryl thiodipropionate (DLTDP) or dioctadecyl 3,3′-thiodipropionate (DSTDP); and

a fusing agent to be applied to at least a portion of the build material composition during 3D printing, the fusing agent including a radiation absorber to absorb radiation to melt or fuse the build material composition in the at least the portion.

2. The kit as defined in claim 1 wherein the phosphorus-containing antioxidant is present in the build material composition in an amount ranging from about 0.2 wt % to about 0.8 wt %, based on a total weight of the build material composition.

3. The kit as defined in claim 1 wherein the sulfur-containing antioxidant is present in the build material composition in an amount ranging from about 0.2 wt % to about 2.4 wt %, based on a total weight of the build material composition.

4. A method for three-dimensional (3D) printing, comprising:
applying a build material composition to form a build material layer, the build material composition including:
a polyamide 6,13 material, a phosphorus-containing antioxidant including tris(2,4-ditert-butylphenyl) phosphite or a phosphonate-based antioxidant, and a sulfur-containing antioxidant including dilauryl thiodipropionate (DLTDP) or dioctadecyl 3,3′-thiodipropionate (DSTDP); or
a polyamide 6 material, the sulfur-containing antioxidant, and a phenolic antioxidant;

based on a 3D object model, selectively applying a fusing agent on at least a portion of the build material composition; and
exposing the build material composition to radiation to fuse the at least the portion to form a layer of a 3D part.

5. The method as defined in claim 4 wherein the build material composition includes the polyamide 6,13 material, the phosphorus-containing antioxidant, and the sulfur-containing antioxidant, and the method is accomplished in an environment containing air.

6. The method as defined in claim 4 wherein the build material composition includes the polyamide 6 material, the sulfur-containing antioxidant, and the phenolic antioxidant, and the method is accomplished in an environment containing 4 vol % or less of oxygen.

7. The method as defined in claim 4 wherein one of:
i) the build material composition includes the polyamide 6,13 material, the phosphorus-containing antioxidant, and the sulfur-containing antioxidant;
the phosphorus-containing antioxidant is present in the build material composition in an amount ranging from about 0.2 wt % to about 0.8 wt %, based on a total weight of the build material composition; and
the sulfur-containing antioxidant is present in the build material composition in an amount ranging from about 0.2 wt % to about 2.4 wt %, based on a total weight of the build material composition; or
ii) the build material composition includes the polyamide 6 material, the sulfur-containing antioxidant, and the phenolic antioxidant;
the phenolic antioxidant is present in the build material composition in an amount ranging from about 0.2 wt % to about 0.8 wt %, based on a total weight of the build material composition; and
the sulfur-containing antioxidant is present in the build material composition in an amount ranging from about 0.2 wt % to about 2.4 wt %, based on a total weight of the build material composition.

8. The method as defined in claim 4 , further comprising repeating the applying of the build material composition, the selectively applying of the fusing agent, and the exposing of the build material composition, wherein the repeating forms the 3D part including the layer.

9. The method as defined in claim 8 wherein the build material composition includes the polyamide 6,13 material, the phosphorus-containing antioxidant, and the sulfur-containing antioxidant, and the 3D part has an ultimate tensile strength greater than or equal to 50 MPa.

10. The method as defined in claim 8 wherein the build material composition includes the polyamide 6,13 material, the phosphorus-containing antioxidant, and the sulfur-containing antioxidant, and the 3D part has an elongation at break greater than or equal to 50%.

11. The method as defined in claim 8 wherein the build material composition includes the polyamide 6 material, the sulfur-containing antioxidant, and the phenolic antioxidant, and the 3D part has an ultimate tensile strength greater than or equal to 65 MPa.

12. The method as defined in claim 8 wherein the build material composition includes the polyamide 6 material, the sulfur-containing antioxidant, and the phenolic antioxidant, and the 3D part has an elongation at break greater than or equal to 5%.

13. The kit as defined in claim 1 wherein the sulfur-containing antioxidant and the phosphorus-containing antioxidant have an average particle size of about 5 μm or less.

14. The method as defined in claim 4 , wherein the sulfur-containing antioxidant and the phosphorus-containing antioxidant have an average particle size of about 5 μm or less.

15. The kit as defined in claim 1 wherein the build material composition consists of the polyamide 6,13 material, the phosphorus-containing antioxidant, and the sulfur-containing antioxidant.

16. The kit as defined in claim 15 wherein:
the phosphorus-containing antioxidant is present in an amount ranging from about 0.2 wt % to about 0.8 wt %, based on a total weight of the build material composition; and
the sulfur-containing antioxidant is present in an amount ranging from about 0.2 wt % to about 1.5 wt %, based on a total weight of the build material composition.

17. The kit as defined in claim 16 wherein the phosphorus-containing antioxidant is the phosphonate-based antioxidant and the sulfur-containing antioxidant is the dioctadecyl 3,3′-thiodipropionate.

Assignees

• Peridot Print Llc

Inventors

• Woodruff Shannon Reuben
• Discekici Emre Hiro
• Donovan Rachael
• Fleischmann Carolin

Classifications

• B29K2105/0044

  Stabilisers, e.g. against oxydation, light or heat · CPC title

• B29K2077/00

  Use of {PA, i.e.} polyamides, e.g. polyesteramides {or derivatives thereof}, as moulding material · CPC title

• B33Y30/00

  Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• C08K5/0041

  Optical brightening agents, organic pigments · CPC title