HEAT STORAGE MATERIAL

PURPOSE: To obtain a heat storage material consisting essentially of paraffins and polyolefin based thermoplastics having low crystallinity, having high-level (≥35kcal/kg) latent heat and free from crack even when molded into sheet. CONSTITUTION: The aimed heat storage material consisting essentially of paraffins (e.g. paraffin, wax, stearic acid, polyethylene glycol, etc.) and polyolefin based thermoplastics (preferably having 5-40wt.% crystallinity, e.g. PE or PP) having low crystallinity and preferably used at an amount of 5-30 pts.wt. based on 100 pts.wt. of the paraffins. Furthermore, maximum crystal transfer temperature Tmax of the above-mentioned plastics is preferably at least 10°C higher than Tmax of paraffins.COPYRIGHT: (C)1992,JPO&Japio