Claims
- 1. A laminate structure comprising a first material layer having a first and second surface, a barrier layer of a resin composition disposed on the first surface of the first layer, and a second material layer disposed on at least one of the second surface of the first layer or the barrier layer; in which said resin composition comprises:(a) a polyvinyl alcohol resin having a saponification degree of not less than 70% and (b) an inorganic laminar compound having an aspect ratio of 200 to 3000 having a layered crystal structure, wherein unit crystal layers are mutually stacked to form said layered structure, and said inorganic laminar compound is swollen or cleft when in a solvent; said composition has a volume ratio of: inorganic laminar compound/polyvinyl alcohol, in the range of 5/95 to 30/70, and said laminate structure exhibits an oxygen permeability of not more than 0.5 cc/m2-day-atm under the condition of 30° C. and 60% relative humidity.
- 2. The laminate structure according to claim 1, which has the shape of a film.
- 3. The laminate structure according to claim 1, wherein either the first material layer or the second material layer comprises polypropylene and is dry laminated to the barrier layer.
- 4. The laminate structure according to claim 1, wherein the barrier layer is formed by applying a coating liquid containing the resin composition mixture onto a surface of the first material layer or second material layer and then drying the resultant coating.
- 5. The laminate structure according to claim 1, wherein the barrier layer is formed and laminated onto at least one of the first and second material layers.
- 6. The laminate structure according to claim 1, wherein the first material layer or the second material layer is extrusion-laminated onto the barrier layer.
Priority Claims (2)
Number |
Date |
Country |
Kind |
6-6013 |
Jan 1994 |
JP |
|
6-6470 |
Jan 1994 |
JP |
|
Parent Case Info
Application Ser. No. 08/525,620, filed Sep. 22, 1995 was, in turn, the National Phase of International Application PCT/JP95/00072 filed Jan. 24, 1995 which designated the U.S. and that International Application was not published under PCT Article 21(2) in English.
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Entry |
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Continuations (1)
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Number |
Date |
Country |
Parent |
08/525620 |
|
US |
Child |
08/939951 |
|
US |