Dissolvable Sheet Pore Structure via Aging and Anti-Gravity Drying

The patent applies porous materials by creating a foam structure with controlled cell sizes during the drying process. The aerated pre-mixture is dried to form a porous network that allows water to penetrate through multiple layers simultaneously, maintaining fast dissolution rate while delivering sufficient surfactant quantity. The porous structure provides channels for water flow through the multi-layer assembly.

The patent transitions from a dense multi-layer structure to a three-dimensional porous foam structure. This dimensional change creates internal void space that allows water to access surfactants throughout the entire article volume simultaneously, rather than requiring sequential dissolution through each layer, thus maintaining fast dissolution rate while achieving sufficient surfactant delivery.

The patent applies equipotentiality by controlling the drying process to achieve uniform pore structure throughout the sheet. The drying conditions are optimized so that water evaporates uniformly from all regions, preventing the formation of a dense crust at the top surface. This results in consistent cell wall thickness and pore size distribution across the entire sheet, including the top surface region.

The patent applies parameter changes by carefully controlling drying temperature, humidity, and time parameters to prevent excessive water removal from the top surface. By adjusting these drying parameters, the process maintains adequate moisture during drying to preserve pore structure uniformity, resulting in consistent porosity throughout the sheet including the top surface region.

The patent applies preliminary action by allowing the aerated pre-mixture to rest before drying. This preliminary resting period enables the air bubbles to stabilize and distribute uniformly throughout the pre-mixture, creating a more homogeneous foam structure. When drying subsequently occurs, this pre-stabilized structure results in better pore uniformity and optimized dissolution profile.

The patent applies continuity of useful action by maintaining the aerated state of the pre-mixture for an extended period before drying. The aeration effect is sustained continuously, allowing thorough bubble distribution and stabilization throughout the material. This continuous aeration maintains the beneficial pore-forming action until the drying process begins, optimizing the final pore structure and dissolution characteristics.