Three-dimensional printing antimicrobial products

Patent metadata

Field	Value
Publication number	US-12397499-B2
Application number	US-202018040907-A
Country	US
Kind code	B2
Filing date	Sep 23, 2020
Priority date	Aug 13, 2020
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

A method of preparing antimicrobial 3D-printed material with antimicrobial agents integrated with the 3D-printed material. The 3D-printed material fabricated with the method of the present disclosure includes antimicrobial agent (s) fully integrated throughout the product and display antimicrobial effect throughout the product, which is resistant to daily wear and tear.

First claim

The invention claimed is:

1. A method of preparing antimicrobial 3D-printed material, comprising the steps of:
a) mixing an antimicrobial agent with a 3D printing resin to form a mixture;
b) transforming the mixture through digital light processing in a 3D printer; and
c) printing the material;
wherein the antimicrobial agent comprises solid polyhexamethylene biguanide (PHMB);
wherein a mixing agent is added during the mixing step;
wherein the mixing agent is 99% ethanol, the mixing agent is added in an amount in the weight ratio of 1:1 of the antimicrobial agent, and the antimicrobial agent is provided in 0.25-1% by weight of the resin; and
wherein the resin is ABS based UV sensitive resin.

2. The method according to claim 1 , wherein the 3D-printed material does not contain nanotubes.

3. The method according to claim 1 , wherein the antimicrobial agent further comprises chloroxylenol, cetylpyridinum chloride (CPC), cetrimonium bromide (CTAB), zinc oxide, silver oxide, titanium dioxide or a combination thereof.

4. The method according to claim 1 , wherein the antimicrobial agent further comprises zinc oxide, silver oxide, or titanium dioxide.

5. The method according to claim 1 , wherein the antimicrobial agent is a combination of solid polyhexamethylene biguanide (PHMB) and zinc oxide.

6. The method according to claim 1 , the mixing step is performed using an ultrasonic mixer.

7. The method according to claim 1 , wherein the digital light processing is provided by a digital light projector.

Assignees

• Univ Hong Kong Polytechnic

Inventors

• Lo Kwan Yu
• Kan Chi Wai

Classifications

• C08K5/0058

  Biocides; (macromolecular substances as carriers for biocide material A01N25/10) · CPC title

• B29C64/10

  Processes of additive manufacturing · CPC title

• C08L55/02 Primary

  ABS [Acrylonitrile-Butadiene-Styrene] polymers · CPC title

• B29K2105/0035

  Medical or pharmaceutical agents · CPC title

• B29K2055/02

  ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers · CPC title