Reusable Diaper with Hydrophobic Layer and Collection Unit

The diaper is divided into multiple functional layers including a liquid-permeable inner layer, a collection chamber, and a liquid-impermeable outer layer. Each layer performs a specific function: the inner layer allows urine passage, the collection chamber stores and absorbs urine, and the outer layer prevents leakage. This segmentation enables both ease of use and improved absorption rate by optimizing each layer's function.

The inner layer is designed as a porous, liquid-permeable material that allows urine to pass through quickly while the collection chamber uses absorbent material with controlled porosity to rapidly absorb and retain urine. This use of porous materials with appropriate pore sizes and distributions enhances the absorption rate while maintaining ease of operation.

The diaper structure separates the skin-contact inner layer from the urine collection chamber, allowing urine to be quickly drawn away from the skin through the porous inner layer and stored in the collection chamber. This segmentation reduces prolonged skin contact with urine, thereby minimizing skin irritation while maintaining ease of use.

The porous inner layer rapidly wicks urine away from the skin surface through capillary action, keeping the skin dry and reducing irritation. The controlled porosity of the absorbent material in the collection chamber also helps regulate moisture levels, preventing skin maceration and irritation.

The diaper is designed with a reusable outer shell that can be cleaned and reused multiple times, while only the inner absorbent layers need to be replaced. This approach reduces waste compared to completely disposable diapers, as the majority of the diaper structure is recovered and reused. The replaceable inner layers are designed for easy disposal, maintaining ease of manufacture while improving environmental performance.

The diaper uses composite materials including biodegradable components in the absorbent layers and durable, reusable materials in the outer shell. This combination allows the product to be manufactured efficiently while reducing environmental impact through selective use of biodegradable materials that can break down naturally, contrasting with conventional fully synthetic disposable diapers.

The diaper is segmented into distinct functional modules: a reusable outer shell, a collection chamber with absorbent material, and replaceable inner layers. This segmentation allows the absorption capacity to be enhanced by adding more or larger absorbent layers without making the entire diaper excessively complex, as each module can be independently manufactured and assembled.

The collection chamber is nested within the outer shell, and the absorbent layers are nested within the collection chamber. This nested structure allows multiple absorption layers to be contained within a compact form factor, increasing absorption capacity without proportionally increasing overall device complexity. The nested design also simplifies assembly and manufacturing.