Multi-layer container

Abstract

To provide a reusable multilayer container in which a weakly alkaline aqueous solution can be easily prepared. [Solution] A multilayer container has an inner layer 2 and an outer layer 3 and is filled with an aqueous solution. The inner layer 2, which comes into contact with the aqueous solution, is a resin layer containing 3 to 60 mass % of a soluble basic additive, and the outer layer 3, which comes into contact with the outside air, is a resin layer that does not contain a basic additive. The basic additive contains at least one selected from calcium carbonate, calcium oxide, calcium hydroxide, magnesium carbonate, magnesium oxide, and magnesium hydroxide. The base resin of the inner layer 2 has a water vapor transmission rate of 150 g / m 2 per 24 hours. 2 It is preferable that the inner layer 2 is a foamed layer containing a foaming agent.

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