INTERNAL POUCH TO BE HOUSED IN DOUBLE-STRUCTURE AEROSOL CAN

摘要

The present invention relates to an internal pouch which is to be housed in a double-structure aerosol can that can eject both a first preparation of an oxidation hair dye composed of the first preparation and a second preparation and the second preparation of the oxidation hair dye simultaneously, wherein the first preparation contains a strongly alkaline component, the second preparation comprises an acidic component, and the internal pouch comprises a first internal pouch in which the first preparation is to be housed and a second internal pouch in which the second preparation is to be housed. In the internal pouch, the first internal pouch has a layered structure composed of at least a polyolefin inner layer, an inner-layer-side adhesive resin layer, an aluminum foil, an outer-layer-side adhesive resin layer and an impact-resistant thermoplastic resin outer layer in this order, the second internal pouch has a layered structure composed of at least a polyolefin inner layer, an inner-layer-side adhesive resin layer, a polyester resin layer, an outer-layer-side adhesive resin layer and an impact-resistant thermoplastic resin outer layer in this order, and the adhesive resin for the inner-layer-side adhesive resin layer in the first internal pouch comprises a polyether-type urethane resin. In the internal pouch, the interlayer peeling can be prevented effectively even when the internal pouch is subjected to dropping impact or the like.