Liquid-repellent structure, production method therefor, packaging material, and separation sheet

Patent metadata

Field	Value
Publication number	US-11939485-B2
Application number	US-202217841906-A
Country	US
Kind code	B2
Filing date	Jun 16, 2022
Priority date	Dec 19, 2019
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A liquid-repellent structure includes a surface to which liquid repellency is to be imparted; a foundation layer having a surface and disposed to face the surface to which liquid repellency is to be imparted; and a liquid-repellent layer disposed to face the surface of the foundation layer, wherein the foundation layer contains an acid-modified polyolefin, the liquid-repellent layer contains a fluorine-containing resin and particles, and the fluorine-containing resin contains a hydrophilic structural unit having at least one of an amino group and an amide group. A packaging material has the liquid-repellent structure disposed to face a product. The packaging material can also be applied to a product that is a selected one of hand soap, body soap, shampoo, rinse, creams, and cosmetics and that contains a surfactant.

First claim

What is claimed is:

1. A liquid-repellent structure, comprising:
a surface to which liquid repellency is to be imparted;
a foundation layer having a surface and disposed to face the surface to which liquid repellency is to be imparted; and
a liquid-repellent layer disposed to face the surface of the foundation layer,
wherein
the foundation layer contains an acid-modified polyolefin,
the liquid-repellent layer contains a fluorine-containing resin and particles,
the fluorine-containing resin contains a hydrophilic structural unit having at least one of an amino group and an amide group, and
the acid-modified polyolefin is obtained by graft-modifying a polyolefin with an unsaturated carboxylic acid, an unsaturated carboxylic acid anhydride, or an unsaturated carboxylic acid ester.

2. The liquid-repellent structure of claim 1 , wherein the particles include scale-like particles having an average primary particle size of 0.1 to 6 different ones of the scale-like particles constituting respective aggregates.

3. The liquid-repellent structure of claim 1 , wherein the liquid-repellent layer contains spherical particles having an average primary particle size of 5 to 1000 nm.

4. The liquid-repellent structure of claim 1 , wherein the foundation layer contains a filler having an average primary particle size of 5 to 100 μm.

5. The liquid-repellent structure of claim 1 , wherein the fluorine-containing resin does not contain a structural unit derived from pyrrolidone nor a derivative of pyrrolidone.

6. A packaging material for packaging a product, comprising:
the liquid-repellent structure of claim 1 , the liquid-repellent structure being disposed to face the product.

7. The packaging material of claim 6 , wherein the product is a selected one of hand soap, body soap, shampoo, rinse, creams, and cosmetics and contains a surfactant.

8. A separation sheet for covering a product, comprising:
the liquid-repellent structure of claim 1 , the liquid-repellent structure being disposed to face the product.

9. The separation sheet of claim 8 , wherein the product is a selected one of hand soap, body soap, shampoo, rinse, creams, and cosmetics and contains a surfactant.

10. The liquid-repellent structure of claim 1 , wherein the surface to which liquid repellency is to be imparted is a surface of a substrate having a melting temperature of 170° C. or lower.

11. The liquid-repellent structure of claim 1 , wherein the surface to which liquid repellency is to be imparted is a surface of a substrate having a melting temperature of 150° C. or lower.

12. The liquid-repellent structure of claim 1 , wherein the fluorine-containing resin is a copolymer of a fluorine-containing monomer and a monomer containing a hydrophilic structural unit having at least one of an amino group and an amide group.

13. The liquid-repellent structure of claim 12 , wherein a total amount of the monomer containing the hydrophilic structural unit in the fluorine containing resin is 0.01 to 12 mmol/g.

14. The liquid-repellent structure of claim 1 , wherein the fluorine-containing resin does not contain a structural unit derived from pyrrolidone.

15. The liquid-repellent structure of claim 12 , wherein the fluorine-containing resin does not contain a structural unit derived from pyrrolidone.

16. A method for producing the liquid-repellent structure of claim 1 , comprising:
forming the foundation layer on the surface to which liquid repellency is to be imparted;
preparing a coating liquid for forming the liquid-repellent layer;
forming a coating film of the coating liquid on the surface of the foundation layer; and
drying the coating film.

Assignees

• Toppan Inc

Inventors

• Kato Ryoji
• Kinoshita Kosuke
• OGIHARA Yu

Classifications

• C09D127/12 Primary

  containing fluorine atoms · CPC title

• B05D7/546

  each layer being cured, at least partially, separately · CPC title

• B65D65/42

  Applications of coated or impregnated materials · CPC title

• C09D5/002 Primary

  Priming paints (C09D5/08 takes precedence) · CPC title

• C09D7/67

  Particle size smaller than 100 nm · CPC title