Multilayer structure, method for producing same, packaging material and product including same, and protective sheet for electronic device

Patent metadata

Field	Value
Publication number	US-10414144-B2
Application number	US-201515539393-A
Country	US
Kind code	B2
Filing date	Dec 24, 2015
Priority date	Dec 24, 2014
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

The present invention relates to a multilayer structure including a base (X) and a layer (Y) stacked on the base (X). The layer (Y) contains a reaction product (D) of an aluminum-containing compound (A) and a phosphorus compound (B), and the reaction product (D) has an average particle diameter of 5 to 70 nm.

First claim

The invention claimed is:

1. A multilayer structure, comprising a base (X) and a layer (Y) stacked on the base (X), wherein:
the layer (Y) comprises a reaction product (D) of an aluminum-containing compound (A) and a phosphorus compound (B), and
the reaction product (D) has an average particle diameter of 5 to 70 nm.

2. The multilayer structure according to claim 1 , wherein the phosphorus compound (B) is an inorganic phosphorus compound (BI).

3. The multilayer structure according to claim 1 , wherein the aluminum-containing compound (A) is an aluminum-containing metal oxide (Aa).

4. The multilayer structure according to claim 1 , wherein the base (X) comprises at least one layer selected from the group consisting of a thermoplastic resin film layer and a paper layer.

5. A method for producing the multilayer structure according to claim 1 the method comprising:
(I) applying a coating liquid (S) comprising the aluminum-containing compound (A), the phosphorus compound (B), and a solvent onto the base (X) to form a layer (Y) precursor comprising a reaction product (D) precursor; and
(II) heat-treating the layer (Y) precursor at a temperature of 140° C. or higher to form the layer (Y),
wherein:
the layer (Y) precursor formed in the step (I) has a solvent content of 0.4 wt % or less, and
the reaction product (D) precursor has an average particle diameter of less than 5 nm.

6. The production method according to claim 5 , wherein the step (I) comprises a drying step of removing the solvent from the coating liquid (S) after applying the coating liquid (S) onto the base (X), and a drying temperature in the drying step is lower than 140° C.

7. The production method according to claim 6 , wherein, in an infrared absorption spectrum of the layer (Y) precursor obtained in the step (I), a ratio A R /A P of a maximum A R of absorbance in a region from 1,080 to 1,130 cm −1 to a maximum A P of absorbance in a region from 850 to 950 cm −1 is 2.0 or less.

8. A packaging material, comprising the multilayer structure according to claim 1 .

9. The packaging material according to claim 8 , further comprising a layer formed by extrusion coating lamination.

10. The packaging material according to claim 8 , being a vertical form-fill-seal bag, a vacuum packaging bag, a pouch, a laminated tube container, an infusion bag, a paper container, a strip tape, a container lid, or an in-mold labeled container.

11. A product, comprising the packaging material according to claim 8 in at least a part of the product.

12. The product according to claim 11 , which is adapted to function as a vacuum insulator, the product having an interior with a reduced pressure, the product comprising a substance contained in the interior, the substance being a core material.

13. A protective sheet for electronic devices, comprising the multilayer structure according to claim 1 .

14. The protective sheet for electronic devices according to claim 13 , being a protective sheet for protecting a surface of a photoelectric conversion device, information display device, or lighting device.

15. An electronic device, comprising the protective sheet according to claim 13 .

16. The multilayer structure according to claim 1 , having an oxygen transmission rate of 2 mL/m 2 ·day·atm or less at 20° C. and 85% RH after retorting under 130° C. for 60 minutes.

Assignees

• Kuraray Co

Inventors

• Inubushi Yasutaka
• Sasaki Ryoichi
• Ota Masahiko

Classifications

• B32B2307/7246

  Water vapor barrier · CPC title

• B32B2307/306

  Resistant to heat · CPC title

• B65D81/24

  Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants (with thermal insulation B65D81/38) · CPC title

• B32B2307/7244

  Oxygen barrier · CPC title

• B32B2307/412

  Transparent · CPC title