Sleep Comfort Evaluation in Bedding that Utilized Phase Change Materials (PCM)

Abstract

The purpose of this study is to reveal the bedding influence degree to quality of sleep. This bedding utilized Phase Change Materials (PCM). We carried out two experiments. Firstly, we experimentally confirmed thermal properties of the PCM. Secondly, we carried out overnight sleep experiment in hot and cold environment. We prepared the PCM bedding and normal bedding that is commercially-supplied. Consequently, the PCM had been the property of cold tactile sensation rather than the normal bedding. From overnight sleep experiment, we found that subjects fell asleep earlier by using the PCM bedding. In cold environment, subjects' skin humidity was low and felt bad after sleep in the PCM bedding sleep. We concluded the PCM has a special endothermic property to deprive the temperature of skin surface.