Gas-barrier laminate
View Patent ↗In the gas-barrier laminate having an inorganic thin layer formed on at least one surface of a substrate having a polyethylene naphthalate layer, provided by the present invention is a gas-barrier laminate having not only high water vapor barrier property and oxygen barrier property abut also excellent adhesion between the substrate and the inorganic thin layer. The said gas-barrier laminate, comprising: a substrate comprising a polyethylene naphthalate layer; a layer formed from a composition comprising an acryl polyol and an isocyanate compound on at least one surface of the substrate; and an inorganic thin layer, arranged in the stated order.
1. A gas-barrier laminate, comprising:
a substrate comprising a polyethylene naphthalate (PEN) layer, a mixed PET-PEN layer comprising a mixture of polyethylene naphthalate and polyethylene terephthalate on the PEN layer, and a polyethylene terephthalate (PET) layer on the mixed PET-PEN layer;
an anchor coat layer formed from a composition comprising an acryl polyol and an isocyanate compound on a surface of the PEN layer; and
an inorganic thin layer, arranged in the stated order.
2. The gas-barrier laminate according to claim 1 , wherein a mass ratio of the acryl polyol to the isocyanate compound, (acryl polyol)/(isocyanate compound), is from 0.01 to 0.5.
3. The gas-barrier laminate according to claim 1 , wherein the gas-barrier laminate is suitable as a packaging material for a medical purpose.
4. The gas-barrier laminate according to claim 1 , wherein a mass ratio of the acryl polyol to the isocyanate compound, (acryl polyol)/(isocyanate compound), is from 0.05 to 0.15.
5. The gas-barrier laminate according to claim 1 , wherein the substrate is a biaxially stretched substrate.
6. The gas-barrier laminate according to claim 1 , wherein the ratio of each of the PEN layer, the PET layer, and the mixed PET-PEN layer relative to the total thickness is from 5 to 90%.
7. The gas-barrier laminate according to claim 1 , wherein a total thickness of the substrate is from 5 to 500 μm.
8. The gas-barrier laminate according to claim 1 , wherein a total thickness of the substrate is from 10 to 50 μm.
9. The gas-barrier laminate according to claim 1 , wherein a content of acryl polyol in the composition is from 1 to 20% by mass, relative to a total solid amount in the composition.
10. The gas-barrier laminate according to claim 1 , wherein a content of acryl polyol in the composition is from 2 to 10% by mass, relative to a total solid amount in the composition.
11. The gas-barrier laminate according to claim 1 , wherein a content of isocyanate compound in the composition is from 5 to 99% by mass, relative to a total solid amount in the composition.
12. The gas-barrier laminate according to claim 1 , wherein a content of isocyanate compound in the composition is from 50 to 95% by mass, relative to a total solid amount in the composition.
13. The gas-barrier laminate according to claim 1 , wherein a thickness of the anchor coat layer is from 0.001 to 1 μm.
14. The gas-barrier laminate according to claim 1 , wherein a thickness of the anchor coat layer is from 0.01 to 0 . 1 μm.
15. The gas-barrier laminate according to claim 1 , wherein a thickness of the inorganic thin layer is from 0.1 to about 500 nm.
16. The gas-barrier laminate according to claim 1 , wherein a thickness of the inorganic thin layer is from 1 to 100 nm.
17. The gas-barrier laminate according to claim 1 , wherein a total thickness of the gas-barrier laminate is in the range of 30 to 500 μm.