Transparent barrier sheet and production method of transparent barrier sheet

Abstract

A transparent barrier sheet comprising: (a) a substrate; (b) a transparent inorganic thin layer; and (c) a transparent organic thin layer, wherein the transparent organic thin layer is formed by cross-linking: (i) a first compound having three or more isocyanate groups in the molecule; and (ii) a second compound having two or more hydroxyl groups in the molecule.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic sectional view showing one example of the layer configuration of the transparent barrier sheet of the present invention.

FIG. 2 is a schematic flow diagram of a production process of the transparent barrier sheet of the present invention.

Claims

1. A transparent barrier sheet comprising: (a) a substrate;(b) a transparent inorganic thin layer; and(c) a transparent organic thin layer,wherein the transparent organic thin layer is formed by cross-linking: (i) a first compound having three or more isocyanate groups in the molecule; and(ii) a second compound having two or more hydroxyl groups in the molecule.

2. The transparent barrier sheet of claim 1, wherein a content of the isocyanate groups in the first compound is 30 to 65 weight % based on the molecular weight of the first compound.

3. The transparent barrier sheet of claim 1, wherein a molecular weight of the second compound is from 100 to 2000.

4. The transparent barrier sheet of claim 1, wherein (b) the transparent inorganic thin layer and (c) the transparent organic thin layer are provided in that order on (a) the substrate sheet.

5. The transparent barrier sheet of claim 4, wherein a primary layer is provided between (a) the substrate sheet and (b) the transparent inorganic thin layer.

6. The transparent barrier sheet of claim 4, wherein (d) a second transparent inorganic thin layer is provided on (c) the transparent organic thin layer.

7. The transparent barrier sheet of claim 4, wherein (d) a second transparent inorganic thin layer; and (e) a second transparent organic thin layer are provided in that order on (c) the transparent organic thin layer.

8. The transparent barrier sheet of claim 4, wherein a thickness of the transparent organic thin layer is from 50 nm to 5.0 μm.

9. A method of producing a transparent barrier sheet of claim 1 comprising the steps of in the order named: (I) forming the transparent inorganic thin layer on the substrate sheet; and(II) forming the transparent organic thin layer,wherein a maximum attained temperature T (in K) of the substrate sheet is controlled to be in the range of 243 to 383 K during the formations of the transparent inorganic thin layer and the transparent organic thin layer.

10. The method of producing a transparent barrier sheet of claim 9, wherein the maximum attained temperature T (in K) of the substrate sheet is controlled to satisfy Formula (1): 1.41<(T×S)/1000≦460   Formula (1)wherein S (in second) represents a required time to form the transparent inorganic thin layer and the transparent organic thin layer.

11. The method of producing a transparent barrier sheet of claim 9, wherein the transparent inorganic thin layer and the transparent organic thin layer are formed by employing a vapor deposition method.

12. The method of producing a transparent barrier sheet of claim 9, wherein the step (II) to form the transparent organic thin layer comprises the steps of:(II-1) depositing on the transparent inorganic thin layer vapors of: (i) the first compound having three isocyanate groups in the molecule; and(ii) the second compound having two or more hydroxyl groups in the molecule,(II-2) polymerizing the deposited vapors by irradiating with actinic rays or by heating.