Liquid-repellent structure, production method thereof, wrapping material, and separation sheet

Patent metadata

Field	Value
Publication number	US-11969977-B2
Application number	US-202017122747-A
Country	US
Kind code	B2
Filing date	Dec 15, 2020
Priority date	Jun 20, 2018
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

The liquid-repellent structure comprises a major surface to which liquid repellency is imparted, and a liquid-repellent layer formed on the major surface; wherein the liquid-repellent layer contains a scale-like filler having an average particle size of 0.1 to 6 μm, inclusive, a thermoplastic resin, and a fluorine compound, and has aggregates containing the scale-like filler; and the ratio W S1 /(W P +W FC ) of the mass W S1 of the scale-like filler contained in the liquid-repellent layer to the sum (W P +W FC ) of the mass W P of the thermoplastic resin and the mass W FC of the fluorine compound contained in the liquid-repellent layer is 0.1 to 10 inclusive.

First claim

What is claimed is:

1. A liquid-repellent structure, comprising:
a major surface to which liquid repellency is imparted, and
a liquid-repellent layer on the major surface; wherein
the liquid-repellent layer is a single layer;
the liquid-repellent layer contains a scale-like filler having an average particle size of 0.1 to 6 μm, inclusive, a thermoplastic resin, and a fluorine compound, and has aggregates containing the scale-like filler;
the thermoplastic resin is selected from the group consisting of low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-α olefin copolymer, homo, block, or random polypropylene, propylene-α olefin copolymer, ethylene-vinyl acetate copolymer and an acid modified polyolefin,
the thermoplastic resin constitutes 50 mass % to 95 mass % of a combination of the thermoplastic resin and the fluorine compound, and
the ratio W S1 /(W P +W FC ) of the mass W S1 of the scale-like filler contained in the liquid-repellent layer to the sum (W P +W FC ) of the mass W P of the thermoplastic resin and the mass W FC of the fluorine compound contained in the liquid-repellent layer is 0.1 to 10 inclusive.

2. The liquid-repellent structure of claim 1 , wherein
the liquid-repellent layer further contains a second filler having an average particle size of 5 to 1000 nm, inclusive, and
the ratio (W S1 +W S2 )/(W P +W FC ) of the sum (W S1 +W S2 ) of the mass W S1 of the scale-like filler and the mass W S2 of the second filler contained in the liquid-repellent layer to the sum (W P +W FC ) of the mass W P of the thermoplastic resin and the mass W FC of the fluorine compound contained in the liquid-repellent layer is 0.1 to 10 inclusive.

3. The liquid-repellent structure of claim 2 , wherein the liquid-repellent layer further contains a third filler having an average particle size of 10 to 100 μm, inclusive, and
the ratio (W S1 +W S2 +W S3 )/(W P +W FC ) of the sum (W S1 +W S2 +W S3 ) of the mass W S1 of the scale-like filler, the mass W S2 of the second filler, and the mass W S3 of the third filler contained in the liquid-repellent layer to the sum (W P +W FC ) of the mass W P of the thermoplastic resin and the mass W FC of the fluorine compound contained in the liquid-repellent layer is 0.1 to 10 inclusive.

4. The liquid-repellent structure of claim 1 , wherein
the liquid-repellent layer further contains a third filler having an average particle size of 10 to 100 μm, inclusive, and
the ratio (W S1 +W S3 )/(W P +W FC ) of the sum (W S1 +W S3 ) of the mass W S1 of the scale-like filler and the mass W S3 of the third filler contained in the liquid-repellent layer, to the sum (W P +W FC ) of the mass W P of the thermoplastic resin and the mass W FC of the fluorine compound contained in the liquid-repellent layer is 0.1 to 10 inclusive.

5. The liquid-repellent structure of claim 4 wherein the ratio W S3 /W S1 of the mass W S1 of the scale-like filler and the mass W S3 of the third filler contained in the liquid-repellent layer is 1.0 to 20.0 inclusive.

6. The liquid-repellent structure of claim 5 , wherein the ratio (W S1 +W S3 )/(W P +W FC ) of the sum (W S1 +W S3 ) of the mass W S1 of the scale-like filler and the mass W S3 of the third filler contained in the liquid-repellent layer, to the sum (W P +W FC ) of the mass W P of the thermoplastic resin and the mass W FC of the fluorine compound contained in the liquid-repellent layer is 0.1 to 10.0 inclusive.

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

8. The liquid-repellent structure of claim 1 , wherein the liquid-repellent layer does not contain a structural unit derived from pyrrolidone nor a derivative thereof.

9. The liquid-repellent structure of claim 1 , further comprising a foundation layer containing a thermoplastic resin, the foundation layer being disposed between the major surface to which liquid repellency is imparted and the liquid-repellent layer.

10. The liquid-repellent structure of claim 9 , wherein the foundation layer contains a fifth filler having an average primary particle size of 5 to 30 μm, inclusive.

11. The liquid-repellent structure of claim 10 , wherein the fifth filler has an average primary particle size of 10 to 20 μm, inclusive.

12. A wrapping material having the liquid-repellent structure of claim 1 on a side in contact with a substance.

13. The wrapping material of claim 12 , wherein the substance contains water.

14. The wrapping material of claim 12 , wherein the substance contains oil.

15. The wrapping material of claim 12 , wherein the substance contains a surfactant.

16. The wrapping material of claim 12 , wherein the substance is one member selected from the group consisting of hand soap, body soap, shampoo, rinse, creams, and cosmetics.

17. A separation sheet having the liquid-repellent structure of claim 1 on a side in contact with a substance.

18. The separation sheet of claim 17 , wherein the substance contains water.

19. The separation sheet of claim 17 , wherein the substance contains oil.

20. The separation sheet of claim 17 , wherein the substance contains a surfactant.

21. The separation sheet of claim 17 , wherein the substance is one member selected from the group consisting of hand soap, body soap, shampoo, rinse, creams, and cosmetics.

22. The liquid-repellent structure of claim 1 , wherein the thermoplastic resin constitutes 60 mass % to 95 mass % of the combination of the thermoplastic resin and the fluorine compound.

23. The liquid-repellent structure of claim 1 , wherein the thermoplastic resin constitutes 70 mass % to 90 mass % of the combination of the thermoplastic resin and the fluorine compound.

24. The liquid-repellent structure of claim 1 , wherein a melting point of the thermoplastic resin is 50 to 135° C.

Assignees

• Toppan Printing Co Ltd

Inventors

• Kato Ryoji
• Kinoshita Kosuke
• Suzuta Masayoshi
• Sekikawa Mina

Classifications

• B32B27/20 Primary

  using fillers, pigments, thixotroping agents · CPC title

• B32B5/16

  characterised by features of a layer formed of particles, e.g. chips, powder {or granules (layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02)} · CPC title

• B32B27/08

  of synthetic resin · CPC title

• B32B27/26

  using curing agents · CPC title

• B32B27/308

  comprising acrylic (co)polymers · CPC title