Development and evaluation of plastic parts used with hot waterTokyo Gas supplies equipment that utilizes hot water such as water heaters and the residential fuel cell cogeneration system ENE-FARM. Equipment that utilizes hot water tends to incorporate a large number of expensive metal parts. By replacing the metal parts with plastic parts, we aim to further reduce costs and weight of the relevant equipment. However, because the operating conditions of such equipment with hot water are relatively harsh environment for plastic parts, we conduct various evaluations to accurately estimate the durability of such plastic parts.
To accurately estimate the durability of plastic materials, it is important to use appropriate acceleration conditions in consideration of actual operating conditions. By conducting accelerated degradation test using various devices. We evaluate the durability of plastic parts, screen candidate materials, and suggest the specifications of plastic parts.
|Internal pressure creep testing equipment
－Exposure of plastic parts to hot water distinguished by high temperature and pressure－
|Heat medium immersion test
－Exposure of plastic parts to high-temperature heat medium－
|Plastic material after immersion test
(Top) virgin sample, (bottom) aged sample after 4,000 hours of immersion