Packaging bag for plaster and packaged plaster

摘要

Packaged patch ( 10 ) according to the invention comprises patch ( 2 ) situated in space ( 4 ) inside patch package ( 3 ) composed of laminated packaging material ( 1 ), and its edges are sealed. Laminated packaging material ( 1 ) comprises hygroscopic material layer ( 13 ) made of LDPE containing 20-40 wt % of an inorganic filler, situated between moisture-permeable material layer ( 14 ) made of LDPE and having a moisture permeability of 40-120 g/m²/day and a screen material layer which blocks penetration of moisture, etc. and is composed of HDPE layer ( 12 ) and aluminum foil ( 11 ). The saturation hygroscopicity of laminated packaging material ( 1 ) is 2-30 g/m² under atmosphere conditions with a temperature of 25° C. and a relative humidity of 75%. This construction sufficiently reduces the effect of moisture on a drug in patch ( 2 ) and allows patch ( 2 ) to be held in a stable state for prolonged periods, while also improving the economy and handleability of patch package ( 3 ).