Anti-curling film

Patent metadata

Field	Value
Publication number	US-11760853-B2
Application number	US-202117537728-A
Country	US
Kind code	B2
Filing date	Nov 30, 2021
Priority date	Nov 30, 2020
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

An anti-curling film is provided. The anti-curling film includes a first portion and a second portion covering the first portion. The first portion includes polylactic acid (PLA), polycaprolactone (PCL), polyethylene glycol dimethacrylate (PEGDMA) and a photoinitiator. The second portion includes polycaprolactone (PCL), gelatin, hyaluronic acid (HA), alginate (AA), polyvinyl alcohol (PVA) or a combination thereof.

First claim

What is claimed is:

1. An anti-curling film, comprising:
a first portion comprising polylactic acid (PLA), polycaprolactone (PCL), polyethylene glycol dimethacrylate (PEGDMA) and a photoinitiator; and
a second portion covering the first portion, wherein the second portion comprises polycaprolactone (PCL), gelatin, hyaluronic acid (HA), alginate (AA), polyvinyl alcohol (PVA) or a combination thereof.

2. The anti-curling film as claimed in claim 1 , wherein polyethylene glycol dimethacrylate (PEGDMA) has a grafting rate which is between 65% and 72%.

3. The anti-curling film as claimed in claim 1 , wherein polylactic acid (PLA), polycaprolactone (PCL) and polyethylene glycol dimethacrylate (PEGDMA) have a weight ratio which is between 0.5:1:1 and 0.5:1:6.

4. The anti-curling film as claimed in claim 1 , wherein the first portion comprises a first layer and a second layer.

5. The anti-curling film as claimed in claim 4 , wherein the first layer comprises polycaprolactone (PCL) and polyethylene glycol dimethacrylate (PEGDMA), and polycaprolactone (PCL) and polyethylene glycol dimethacrylate (PEGDMA) have a weight ratio which is between 1:6 and 1:12.

6. The anti-curling film as claimed in claim 4 , wherein the second layer comprises polyethylene glycol dimethacrylate (PEGDMA) and polylactic acid (PLA), and polyethylene glycol dimethacrylate (PEGDMA) and polylactic acid (PLA) have a weight ratio which is between 1:1 and 3:1.

7. The anti-curling film as claimed in claim 1 , wherein polyethylene glycol dimethacrylate (PEGDMA), polylactic acid (PLA) and the photoinitiator have a weight ratio which is between 1:1:0.005 and 3:1:0.015.

8. The anti-curling film as claimed in claim 1 , wherein polylactic acid (PLA), polycaprolactone (PCL), polyethylene glycol dimethacrylate (PEGDMA) and the photoinitiator have a weight ratio which is between 2:1:7:0.03 and 3:1:12:0.06.

9. The anti-curling film as claimed in claim 1 , wherein the second portion comprises a first layer and a second layer.

10. The anti-curling film as claimed in claim 9 , wherein the first layer comprises polycaprolactone (PCL), gelatin, alginate (AA) or a combination thereof.

11. The anti-curling film as claimed in claim 9 , wherein the second layer comprises polycaprolactone (PCL), hyaluronic acid (HA), polyvinyl alcohol (PVA) or a combination thereof.

12. The anti-curling film as claimed in claim 10 , wherein the first layer comprises polycaprolactone (PCL) and gelatin, and polycaprolactone (PCL) and gelatin have a weight ratio which is between 0.14:1 and 1:1.

13. The anti-curling film as claimed in claim 10 , wherein the first layer comprises polycaprolactone (PCL) and alginate (AA), and polycaprolactone (PCL) and alginate (AA) have a weight ratio which is between 8:1 and 4:1.

14. The anti-curling film as claimed in claim 10 , wherein the first layer comprises polycaprolactone (PCL), gelatin and alginate (AA), and polycaprolactone (PCL), gelatin and alginate (AA) have a weight ratio which is between 1:1:0.1 and 1:1.85:0.125.

15. The anti-curling film as claimed in claim 10 , wherein the first layer comprises alginate (AA), and alginate (AA) has a weight percentage which is between 1 wt % and 5 wt %.

16. The anti-curling film as claimed in claim 11 , wherein the second layer comprises polycaprolactone (PCL) and hyaluronic acid (HA), and polycaprolactone (PCL) and hyaluronic acid (HA) have a weight ratio which is between 10:1 and 35:1.

17. The anti-curling film as claimed in claim 11 , wherein the second layer comprises polycaprolactone (PCL) and polyvinyl alcohol (PVA), and polycaprolactone (PCL) and polyvinyl alcohol (PVA) have a weight ratio which is between 1:0.1 and 1:0.16.

18. The anti-curling film as claimed in claim 11 , wherein the second layer comprises polycaprolactone (PCL), hyaluronic acid (HA) and polyvinyl alcohol (PVA), and polycaprolactone (PCL), hyaluronic acid (HA) and polyvinyl alcohol (PVA) have a weight ratio which is between 10:1:0.5 and 35:1:1.

19. The anti-curling film as claimed in claim 1 , wherein the second portion comprises gelatin and alginate (AA), or gelatin.

20. The anti-curling film as claimed in claim 19 , wherein the second portion comprises gelatin and alginate (AA), and gelatin and alginate (AA) have a weight ratio which is between 4:1 and 14.5:1.

21. The anti-curling film as claimed in claim 19 , wherein the second portion comprises gelatin, and gelatin has a weight percentage which is between 10 wt % and 29.9 wt %.

22. The anti-curling film as claimed in claim 1 , wherein the first portion and the second portion have an area ratio which is between 5:100 and 65:100.

23. An anti-curling film, comprising: the second portion of the anti-curling film as claimed in claim 1 .

Assignees

• Ind Tech Res Inst

Inventors

• Chang Wei-Hong
• Chen Ching-Mei
• Chen Grace H
• Shen Hsin-Hsin
• Wang Yuchi
• Yang Ming-Chia
• Lin Li-Hsin
• Chen Sen-Lu
• Lee Yi-Hsuan
• Lin Jian-Wei
• Su Liang-Cheng

Classifications

• A61L31/06 Primary

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds {(A61L31/041 takes precedence)} · CPC title

• A61L15/225 Primary

  Mixtures of macromolecular compounds · CPC title

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title

• A61L31/042

  Polysaccharides · CPC title

• A61L31/045

  Gelatin · CPC title