For providing a non-aqueous electrolyte secondary battery having excellent storage characteristics when stored in the charged state under a high temperature condition, the non-aqueous electrolyte or the negative electrode is made to contain divinylethylene carbonate, thereby to form a film derived from divinylethylene carbonate on the surface of the negative electrode material. The long-term signature data is configured by arranging ES, STS, verification information, ATS, and ATS in a predetermined long-term signature format. It is also the method for preparing a dialkyl carbonate with high yield, thus improving economical efficiency. A plug is received within a hole in the support and secured to the support by fasteners. Methods for producing a reinforced microcellular urethane component are also provided. The structural components are formed of a first material having a high creep strength and the ability to withstand corrosive effects of molten mineral materials.