Apparatus and process for continuously manufacturing microneedles

Patent metadata

Field	Value
Publication number	US-11511463-B2
Application number	US-201816764312-A
Country	US
Kind code	B2
Filing date	Jul 5, 2018
Priority date	Nov 15, 2017
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

The present disclosure relates to an apparatus and a process which can continuously produce microneedles using a conveyor system and decomposition or vacuum. By using the microneedle production method and apparatus according to the present disclosure, continuous mass production of microneedles is available, and therefore it is possible to reduce the input of manpower and produce a large amount of products compared to the conventional production method.

First claim

The invention claimed is:

1. A conveyor apparatus for continuous production of microneedles comprising:
a microneedle mold of a porous material;
a tray on which the mold is placed;
a conveyor belt on which the tray moves;
an applying unit which supplies and applies a microneedle mixed solution to the mold,

wherein the applying unit includes a hopper;
a filling unit which fills the mixed solution in the in a micro-space of the mold; and
a drying unit having a dryer which dries moisture of the mixed solution,
wherein the filling unit has an apparatus for forming decompression or vacuum to a bottom of the mold, and
wherein the production of microneedles takes place continuously on the conveyor belt.

2. The conveyor apparatus according to claim 1 ,
wherein a bottom of the tray has pathway(s) or hole(s) through which air can pass, and
wherein the apparatus forming decompression or vacuum is equipped under the tray.

3. The conveyor apparatus according to claim 2 , wherein the apparatus forming decompression or vacuum is a suction apparatus.

4. The conveyor apparatus according to claim 2 , wherein the microneedle mold has a fine engraved pattern.

5. The conveyor apparatus according to claim 2 , wherein the porous material is a porous polymer selected from the group consisting of Poly dimethyl siloxane (PDMS), Polymethyl hydrosiloxane (PMHS), porous silicon, porous polyurethane and porous Polymethyl methacrylate (PMMA).

6. The conveyor apparatus according to claim 2 , wherein a plurality of molds are arranged on the tray.

7. The conveyor apparatus according to claim 1 ,
wherein the tray has a space inside thereof containing air, and has pathway(s) or hole(s) in a ceiling of the space through which air can pass, and
wherein the apparatus forming decompression or vacuum is equipped so that decompression or vacuum is formed inside of the tray.

8. The conveyor apparatus according to claim 7 , wherein the apparatus forming decompression or vacuum is a suction apparatus.

9. The conveyor apparatus according to claim 7 , wherein the microneedle mold has a fine engraved pattern.

10. The conveyor apparatus according to claim 7 , wherein the porous material is a porous polymer selected from the group consisting of Poly dimethyl siloxane (PDMS), Polymethyl hydrosiloxane (PMHS), porous silicon, porous polyurethane and porous Polymethyl methacrylate (PMMA).

11. The conveyor apparatus according to claim 7 , wherein a plurality of molds are arranged on the tray.

12. The conveyor apparatus according to claim 1 , wherein the apparatus forming decompression or vacuum is a suction apparatus.

13. The conveyor apparatus according to claim 1 , wherein the microneedle mold has a fine engraved pattern.

14. The conveyor apparatus according to claim 1 , wherein the porous material is a porous polymer selected from the group consisting of Poly dimethyl siloxane (PDMS), Polymethyl hydrosiloxane (PMHS), porous silicon, porous polyurethane and porous Polymethyl methacrylate (PMMA).

15. The conveyor apparatus according to claim 1 , wherein a plurality of molds are arranged on the tray.

16. A method for producing microneedles by a continuous process using a conveyor, comprising
a) arranging a microneedle mold of a porous material on a tray;
b) putting the tray on a conveyor belt;
c) supplying and applying a microneedle mixed solution in the mold;
d) forming decompression or vacuum to a bottom of the mold to fill the mixed solution in a micro-space of the mold;
e) drying moisture of the mixed solution to produce microneedles; and
f) separating the produced microneedles from the mold,
wherein the steps of b) to d) take place continuously on the conveyor belt.

17. The method according to claim 16 , further comprising adhering a support comprising an adhesive to the produced microneedles between the steps e) and f).

18. The method according to claim 17 , wherein the support is a skin adhesive patch.

Assignees

• Lg Household & Health Care Ltd

Inventors

• Hwang Young-Min
• Kwon Koo-Chul
• Shim Woo-Sun
• Kang Nae-Gyu

Classifications

• A61M2037/0046

  Solid microneedles · CPC title

• B29C41/50 Primary

  Shaping under special conditions, e.g. vacuum · CPC title

• A61M2037/0053

  Methods for producing microneedles · CPC title

• A61M37/0015

  by using microneedles · CPC title

• B29L2031/7544

  Injection needles, syringes · CPC title