Hydraulic transfer base film, and hydraulic transfer printing film

Patent metadata

Field	Value
Publication number	US-12049546-B2
Application number	US-202117360098-A
Country	US
Kind code	B2
Filing date	Jun 28, 2021
Priority date	Dec 28, 2018
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

The present invention provides a monolayer base film for hydraulic transfer printing that is excellent in water solubility and allows high resolution transfer printing without rupture even in high speed printing and a film for hydraulic transfer printing using the same. The present invention is a base film for hydraulic transfer printing comprising a polyvinyl alcohol resin, the base film forming a printing layer to be transferred to an article by hydraulic transfer printing. In this base film for hydraulic transfer printing, the base film for hydraulic transfer printing has an amount (A1) of crystalline component of 60% or less and an amount (A2) of constrained amorphous component from 10% to 50%, the amounts being obtained from a spin-spin relaxation curve by 1 H pulse NMR measurement of the base film in deuterated methanol, and a moisture content from 1 to 5 mass %.

First claim

The invention claimed is:

1. A base film for hydraulic transfer printing comprising a polyvinyl alcohol resin, the base film for a printing layer to be transferred to an article by hydraulic transfer printing, wherein
the base film for hydraulic transfer printing has an amount (A1) of crystalline component of 60% or less and an amount (A2) of constrained amorphous component from 10% to 50%, the amounts being obtained from a spin-spin relaxation curve by 1H pulse NMR measurement of the base film in deuterated methanol, and a moisture content from 1 to 5 mass %, and
complete dissolution time of the base film for hydraulic transfer printing immersed in deionized water at 10° C. is 90 seconds or less.

2. The base film for hydraulic transfer printing according to claim 1 , wherein a ratio (A1/A2) of the amount (A1) of crystalline component to the amount (A2) of constrained amorphous component is from 0.1 to 5.

3. The base film for hydraulic transfer printing according to claim 1 , wherein a ratio (A2/A3) of the amount (A2) of constrained amorphous component to an amount (A3) of amorphous component obtained from the spin-spin relaxation curve is 1.5 or less.

4. The base film for hydraulic transfer printing according to claim 1 , further comprising wherein from 0.5 to 15 parts by mass of a plasticizer and/or from 0.1 to 15 parts by mass of starch blended based on 100 parts by mass of the polyvinyl alcohol resin.

5. The base film for hydraulic transfer printing according to claim 4 , comprising from 0.5 to 15 parts by mass of a plasticizer based on 100 parts by mass of the polyvinyl alcohol resin.

6. The base film for hydraulic transfer printing according to claim 5 , wherein the plasticizer includes glycerin.

7. The base film for hydraulic transfer printing according to claim 1 , wherein the base film for hydraulic transfer printing has a thickness from 15 to 50 μm.

8. A printing film for hydraulic transfer printing, comprising:
the base film for hydraulic transfer printing according to claim 1 ; and
the printing layer formed on a surface of the base film for hydraulic transfer printing.

9. The printing film for hydraulic transfer printing according to claim 8 , wherein the printing layer is a laminated printing layer having laminated printing patterns different in at least one of hue, saturation, and brightness.

10. The base film for hydraulic transfer printing according to claim 1 , wherein the amount (A1) of crystalline component is from 20% to 60%.

11. The base film for hydraulic transfer printing according to claim 1 , wherein the amount (A1) of crystalline component is from 20% to 50%.

12. The base film for hydraulic transfer printing according to claim 1 , wherein the amount (A2) of constrained amorphous component is from 20% to 50%.

13. The base film for hydraulic transfer printing according to claim 1 , wherein the base film for hydraulic transfer printing further has an amount (A3) of amorphous component from 10% to 60%.

14. The base film for hydraulic transfer printing according to claim 13 , further comprising from 0.1 to 15 parts by mass of starch blended based on 100 parts by mass of the polyvinyl alcohol resin, wherein:
the amount (A1) of crystalline component is from 20% to 60%,
the amount (A2) of constrained amorphous component is from 10% to 50%,
the amount (A3) of amorphous component is from 20% to 50%,
the moisture content is from 1.0 mass % to 4.5 mass %,
a ratio (A2/A3) of the amount (A2) of constrained amorphous component to the amount (A3) of amorphous component obtained from the spin-spin relaxation curve is 1.5 or less,
the polyvinyl alcohol resin has a degree of polymerization from 500 to 3,000, and
the polyvinyl alcohol resin has a degree of saponification from 80 mol % to 90 mol %.

15. The base film for hydraulic transfer printing according to claim 1 , wherein the moisture content is from 1.5 to 4.5 mass %.

16. The base film for hydraulic transfer printing according to claim 1 , wherein the moisture content is from 2 to 4 mass %.

17. The base film for hydraulic transfer printing according to claim 1 , wherein the base film is formed by a process including:
casting a solution including the polyvinyl alcohol resin on a support having a surface temperature from 50° C. to 110° C. to form a film, and
drying the film.

18. The base film for hydraulic transfer printing according to claim 17 , wherein the drying of the film includes contacting the film with a drying roll having a surface temperature from 40° C. to 110° C.

19. The base film for hydraulic transfer printing according to claim 1 , wherein a ratio (A1/A2) of the amount (A1) of crystalline component to the amount (A2) of constrained amorphous component is from 0.5 to 2.

Assignees

• Kuraray Co

Inventors

• Okamoto Minoru
• Shimizu Sayaka
• Kazeto Osamu

Classifications

• C08J2329/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• B65D65/46

  Applications of disintegrable, dissolvable or edible materials · CPC title

• C08K5/053

  Polyhydroxylic alcohols · CPC title

• C08J2331/04

  Homopolymers or copolymers of vinyl acetate · CPC title

• B65D65/42

  Applications of coated or impregnated materials · CPC title