| abstract |
A method of preparing a delivery system using a 3D printer, the method comprising: (a) depositing a first impression material, a second impression material, or both, to form a first outer layer, (b) depositing the first material printing material, the second printing material, or both, to form one or more inner layers, (c) depositing the first printing material, the second printing material, or both, to form a second outer layer on top of the inner layers, so as to thereby prepare a solid or semi-solid build layer by layer, and (d) curing the build, thereby preparing the delivery system, wherein the first impression material contains a polymer having a melting point of 45°C to 300°C, wherein the second printing material contains an active material, and the active material is a fragrance, a flavor, a malodor counteracting agent, or a combination thereof; and wherein the inner layer contains a higher concentration of the active material and/or a higher vapor pressure than the outer layers. |