Thermal Comfort Behaviour of Sanitary Napkin

Abstract

This study aimed to create a highly absorbent and comfortable sanitary napkin with a top layer made of 100% bamboo spun laced material and a core layer comprising different combinations of bamboo, flax, and hemp fibers. The napkins were designed to provide optimal air permeability, water vapor permeability, thermal conductivity, and thermal resistance. The materials and methods involved the use of sustainable and eco-friendly materials such as bamboo, flax, and hemp, along with a super absorbent polymer (SAP) for enhanced absorbency. Air permeability testing revealed that S1, S3 samples exhibited moderate to high breathability due to the bamboo spun laced top layer, which allows air circulation. However, the presence of SAP in the middle layer may have slightly affected overall air permeability. The combination of flax in the core layer positively impacted air permeability due to its inherent breathability and moisture-wicking properties. Water vapor permeability analysis showed that samples with a combination of bamboo and flax or hemp in the core layer demonstrated excellent water vapor transmission. Thermal conductivity evaluation indicated that all samples exhibited good thermal conductivity due to the bamboo spun laced top layer and the inclusion of flax and hemp in the core layer. Thermal resistance testing showed that sample 2, with a core layer of bamboo 40%: hemp 60%, displayed higher thermal resistance, suggesting better insulation and warmth in cooler conditions. In conclusion, the developed sanitary napkins with bamboo spun laced top layers and various combinations of bamboo, flax, and hemp in the core layers demonstrated satisfactory air permeability, water vapor permeability, thermal conductivity, and thermal resistance. These findings underscore the importance of using natural fibers and SAP in creating comfortable and functional sanitary napkins for enhanced user experience.