Resin composition laminate and laminate film
First Claim
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.
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Accused Products
Abstract
A resin composition comprising: a polyvinyl alcohol; and an inorganic laminar compound having an aspect ratio of not less than 50 and not more than 5000, which has a volume ratio of (inorganic laminar compound/polyvinyl alcohol) in the range of (5/95) to (30/70); and a laminate or laminate film comprising, as at least a portion thereof, a layer or portion (1) comprising such a resin composition. The resin composition, laminate or laminate film may exhibit a good gas barrier property while substantially retaining a good film strength.
49 Citations
6 Claims
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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.- View Dependent Claims (2, 3, 4, 5, 6)
- in which said resin composition comprises;
Specification