Patent ID: 6991095

Claim:
A patch package adapted for receiving a pharmaceutical patch comprising: (a) a first sheet consisting of: a first moisture-permeable material layer comprising a first resin and having a moisture permeability of 40–120 g/m 2 /day; a first screen material layer that is comprised of two layers for blocking penetration of moisture and light; and a first hygroscopic material layer located between the first moisture-permeable material layer and the first screen material layer and comprising a first resin containing 20–40 wt % of inorganic filler; and (b) a second sheet consisting of: a second moisture-permeable material layer comprising a second resin and having a moisture permeability of 40–120 g/m 2 /day, the second moisture-permeable layer facing the first moisture-permeable material layer; a second screen material layer that is comprised of two layers for blocking penetration of moisture and light; and a second hygroscopic material layer located between the second moisture-permeable material layer and the second screen material layer and comprising a second resin containing 20–40 wt % of inorganic filler; wherein the first moisture-permeable layer and the second moisture-permeable layer being directly in contact with each other at peripheral areas thereof and fixed to each other at the peripheral areas by heat sealing to form a package shape, and at the peripheral areas, the first hygroscopic material layer and the second hygroscopic material layer are located, respectively, between the first moisture-permeable material layer and the first screen material layer, and between the second moisture-permeable material layer and the second screen material layer.