Three-dimensional printing

Patent metadata

Field	Value
Publication number	US-11384241-B2
Application number	US-201816499510-A
Country	US
Kind code	B2
Filing date	Jan 26, 2018
Priority date	Jan 26, 2018
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

According to examples described herein, methods, compositions, and parts comprising an antistatic agent are described. According to one example, a method of three-dimensional printing can comprise: (i) a layer of build material being deposited; (ii) a first fusing agent being selectively applied on the build material, wherein the first fusing agent can comprise at least one first antistatic agent; and (iii) repetition of (i) and (ii) at least once to form a core of a three-dimensional part.

First claim

What is claimed is:

1. A method of three-dimensional printing comprising:
(i) depositing a layer of build material;
(ii) selectively applying a first fusing agent on the build material, wherein the first fusing agent comprises at least one first antistatic agent; and
(iii) repeating (i) and (ii) at least once to form a core of a three-dimensional part.

2. The method of claim 1 further comprising:
(iv) applying a second fusing agent and a first detailing agent on the core of the three-dimensional part to form an inner shell at least partially enclosing the core, wherein the first detailing agent comprises at least one second antistatic agent; and
(v) applying a second detailing agent on the inner shell, wherein the second detailing agent is free of any near infrared absorbing compound.

3. The method of claim 2 , wherein:
the first fusing agent further comprises a first near infrared absorbing compound;
the second fusing agent further comprises a second near infrared absorbing compound; and
the second detailing agent further comprises at least one third antistatic agent.

4. The method of claim 3 , wherein:
the first antistatic agent, the second antistatic agent, and the third antistatic agent are different; and
the first near infrared absorbing compound and the second near infrared absorbing compound are different.

5. The method of claim 3 , wherein:
the first antistatic agent, the second antistatic agent, and the third antistatic agent are the same, and
the first antistatic agent, the second antistatic agent, and the third antistatic agent are independently selected from the group consisting of Li 2 NiBr 4 , Li 2 CuCl 4 , LiCuO, LiCu 4 O(PO 4 ) 2 , LiSOCl 2 , LiSO 2 Cl 2 , LiSO 2 , LiI 2 , LiN 3 , C 6 H 5 COOLi, LiBr, Li 2 CO 3 , LiCl, C 6 H 11 (CH 2 ) 3 CO 2 Li, LiBO 2 , LiClO 4 , Li 3 PO 4 , Li 2 SO 4 , Li 2 B 4 O 7 , LiAlCl 4 , AuCl 4 Li, LiGaCl 4 , LiBF 4 , LiMnO 2 , LiFeS 2 , LiAg 2 CrO 4 , LiAg 2 V 4 O 11 , LiSVO, LiCSVO, CF 3 SO 3 Li, LiPF 6 , LiBF 4 , LiClO 4 , LiCuS, LiPbCuS, LiFeS, LiBi 2 Pb 2 O 5 , LiBi 2 O 3 , LiV 2 O 5 , LiCoO 2 , LiNiCoO 2 , LiCuCl 2 , Li/Al—V 2 O 5 , lithium bis(oxalato)borate, LiN(SO 2 CF 3 ) 2 , LiN(SOCF 2 CF 3 ) 2 , LiAsF 6 , LiC(SO 2 CF 3 ) 3 , LiN(SO 2 F) 2 , LiN(SO 2 F)(SO 2 CF 3 ), LiN(SO 2 F)(SO 2 C 4 F 9 ), LiOSO 2 CF 3 , and combinations thereof; and
the first antistatic agent, the second antistatic agent, and the third antistatic agent are independently selected from the group consisting of a salt of an alkali or alkaline earth metal selected from the group consisting of quaternary amines, chlorates, phosphates, carbonates, borates, phosphonates, sulfates, acetates, citrates, perchlorates, and combinations thereof.

6. The method of claim 3 , wherein:
the first antistatic agent is present in an amount of from about 0.1 wt. % to about 10 wt. % based upon a total weight of the first fusing agent;
the second antistatic agent is present in an amount of from about 0.01 wt. % to about 7 wt. % based upon a total weight of the first detailing agent; and
the third antistatic agent is present in an amount of from about 0.01 wt. % to about 7 wt. % based upon a total weight of the second detailing agent.

7. The method of claim 1 , wherein the first fusing agent further comprises water, at least one organic solvent, at least one surfactant, and at least one biocide.

8. A three-dimensional printed part comprising:
a core comprising:
a build material selected from the group consisting of polyamides, polyethers, polyethylenes, polyethylene terephthalates, polystyrenes, polyacetals, polypropylenes, polycarbonates, polyesters, thermoplastic polyurethanes, and combinations thereof,
at least one first antistatic agent
an inner shell at least partially enclosing the core, the inner shell comprising the build material and (i) at least one second antistatic agent or (ii) free of any antistatic agent; and
an external shell at least partially enclosing the inner shell, the external shell comprising the build material and (i) at least one third antistatic agent or (ii) free of any antistatic agent.

9. The three-dimensional printed part of claim 8 , wherein the first antistatic agent, the second antistatic agent, and the third antistatic agent are the same.

10. The three-dimensional printed part of claim 8 , wherein the first antistatic agent, the second antistatic agent, and third antistatic agent are thermally stable at a polymer melt processing temperature.

11. The three-dimensional printed part of claim 8 , wherein:
the first antistatic agent, the second antistatic agent, and the third antistatic agent are independently selected from the group consisting of Li 2 NiBr 4 , Li 2 CuCl 4 , LiCuO, LiCu 4 O(PO 4 ) 2 , LiSOCl 2 , LiSO 2 Cl 2 , LiSO 2 , LiI 2 , LiN 3 , C 6 H 5 COOLi, LiBr, Li 2 CO 3 , LiCl, C 6 H 11 (CH 2 ) 3 CO 2 Li, LiBO 2 , LiClO 4 , Li 3 PO 4 , Li 2 SO 4 , Li 2 B 4 O 7 , LiAlCl 4 , AuCl 4 Li, LiGaCl 4 , LiBF 4 , LiMnO 2 , LiFeS 2 , LiAg 2 CrO 4 , LiAg 2 V 4 O 11 , LiSVO, LiCSVO, CF 3 SO 3 Li, LiPF 6 , LiBF 4 , LiClO 4 , LiCuS, LiPbCuS, LiFeS, LiBi 2 Pb 2 O 5 , LiBi 2 O 3 , LiV 2 O 5 , LiCoO 2 , LiNiCoO 2 , LiCuCl 2 , Li/Al—V 2 O 5 , lithium bis(oxalato)borate, LiN(SO 2 CF 3 ) 2 , LiN(SOCF 2 CF 3 ) 2 , LiAsF 6 , LiC(SO 2 CF 3 ) 3 , LiN(SO 2 F) 2 , LiN(SO 2 F)(SO 2 CF 3 ), LiN(SO 2 F)(SO 2 C 4 F 9 ), LiOSO 2 CF 3 , and combinations thereof, or
the first antistatic agent, the second antistatic agent, and the third antistatic agent are independently selected from the group consisting of a salt of an alkali or alkaline earth metal selected from the group consisting of quaternary amines, chlorates, phosphates, carbonates, borates, phosphonates, sulfates, acetates, citrates, perchlorates, and combinations thereof.

12. The three-dimensional printed part of claim 8 , wherein:
the first antistatic agent is present in an amount of from about 0.1 wt. % to about 10 wt. % based upon a total weight of the core;
the second antistatic agent is present in an amount of from about 0.01 wt. % to about 7 wt. % based upon a total weight of the inner shell; and
the third antistatic agent is present in an amount of from about 0.01 wt. % to about 7 wt. % based upon a total weight of the outer shell.

13. The three-dimensional printed part of claim 8 , wherein the build material is polyamide-12, polyether block amide, or a combination thereof.

14. A method of three-dimensional printing comprising:
(i) depositing a layer of build material;
(ii) selectively applying a first fusing agent comprising:
at least one antistatic agent on the build material,
at least one first near infrared absorbing compound,
at least one surfactant,
at least one organic solvent, and
water;

(iii) repeating (i) and (ii) at least once to form a core of a three-dimensional part;
(iv) applying a second fusing agent and a first detailing agent on the core of the three-dimensional part to form an inner shell at least partially enclosing the core, wherein the second fusing agent comprises at least one second near infrared absorbing compound, and wherein the first detailing agent is free of any antistatic agent; and
(v) applying a second detailing agent on the inner shell to at least partially enclose the inner shell and form an external shell, wherein the second detailing agent is free of (a) any near infrared absorbing compound and (b) any antistatic agent.

Assignees

• Hewlett Packard Development Co

Inventors

• Negri Jimenez Graciela Emma
• Kabalnov Alexey S
• Wright Jacob

Classifications

• B33Y70/10

  Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials · CPC title

• B33Y80/00 Primary

  Products made by additive manufacturing · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B29K2105/0008

  Anti-static agents · CPC title

• B29C64/165

  using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber · CPC title