Three-dimensional printing

Patent metadata

Field	Value
Publication number	US-2024391164-A1
Application number	US-202118689772-A
Country	US
Kind code	A1
Filing date	Sep 30, 2021
Priority date	Sep 30, 2021
Publication date	Nov 28, 2024
Grant date	—

Abstract

A polyol stiffening additive in a powder bed material for three-dimensional (3D) printing is disclosed herein. In an example, the 3D powder bed material includes an elastomeric build material and a polyol stiffening additive having 3 to 7 carbon atoms that is about 2 weight percent to about 20 weight percent of a total weight of the 3D powder bed material.

First claim

What is claimed is:

1 . A three-dimensional (3D) powder bed material that forms a 3D printed article, the 3D powder bed material comprising:
an elastomeric build material; and a polyol stiffening additive having 3 to 7 carbon atoms that is from about 2 weight percent to about 20 weight percent of a total weight of the 3D powder bed material.

2 . The 3D powder bed material of claim 1 , wherein the elastomeric build material is a polyamide thermoplastic elastomer (TPA) or a thermoplastic polyurethane (TPU).

3 . The 3D powder bed material of claim 2 , wherein the elastomeric build material further comprises 100 weight percent of the TPA or the TPU.

4 . The 3D powder bed material of claim 1 , wherein the polyol stiffening additive is a diol, a triol, a tetrol, or any combination thereof.

5 . The 3D powder bed material of claim 4 , wherein the polyol stiffening additive is pentaerythritol.

6 . The 3D powder bed material of claim 1 , the polyol stiffening additive is less than 10 weight percent of a total weight of the 3D powder bed material.

7 . The 3D powder bed material of claim 1 , wherein the 3D powder bed material, when fused in a 3D printing process, provides the 3D printed article having a Young's Modulus that is increased by at least 10% as compared to a Young's Modulus of a 3D printed article formed from the elastomeric build material in the absence of the polyol stiffening additive.

8 . The 3D powder bed material of claim 1 , wherein the 3D powder bed material, when fused in a 3D printing process, provides the 3D printed article having an ultimate tensile strength that is greater than or equal to 3 megapascals.

9 . The 3D powder bed material of claim 1 , wherein the 3D powder bed material, when fused in a 3D printing process, provides a 3D printed article having an elongation at break that is greater than or equal to 500 percent.

10 . The 3D powder bed material of claim 1 , wherein a sum of a weight percent of the elastomeric build material and a weight percent of the polyol stiffening additive is equal to a total weight of the 3D powder bed material.

11 . A method to making a three-dimensional (3D) printed article, comprising:
applying a 3D powder bed material comprising a mixture of an elastomeric build material and a polyol stiffening additive having 3 to 7 carbon atoms to a fabrication bed; and fusing the 3D powder bed material to form a 3D printed article.

12 . The method of claim 11 , further comprising:
selectively applying a fusing agent to the 3D powder bed material, and responsive to selectively applying the fusing agent to the 3D powder bed material, fusing the 3D powder bed material to form the 3D printed article.

13 . The method of claim 12 , wherein the fusing agent comprises water and a absorber agent, and wherein fusing the 3D powder bed material further comprises exposing the fabrication bed to radiation energy to selectively fuse portions of the 3D powder bed material in contact with the absorber agent and thereby form the 3D printed article.

14 . A three-dimensional (3D) printed article formed by:
applying a 3D powder bed material comprising a mixture of an elastomeric build material and a polyol stiffening additive having 3 to 7 carbon atoms to a fabrication bed; selectively applying a fusing agent to the 3D powder bed material, and responsive to selectively applying the fusing agent to the 3D powder bed material, fusing the 3D powder bed material to form the 3D printed article.

15 . The 3D printed article of claim 14 , wherein the 3D printed article has a Young's Modulus that is increased by at least 10% as compared to a Young's Modulus of a 3D printed article formed from the elastomeric build material in the absence of the polyol stiffening additive.

Assignees

• Hewlett Packard Development Co

Inventors

• Fleischmann Carolin
• Discekici Emre Hiro
• Levin Emily

Classifications

• B29K2995/0077

  Yield strength; Tensile strength · CPC title

• B29K2275/00

  Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof,} as reinforcement · CPC title

• B29K2105/251

  Particles, powder or granules (expandable particles B29K2105/046) · CPC title

• B29K2077/00

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

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title