Insulation layer for forming sheath of storage element, particularly for hot water tank, is formed by multi-layered fabric made of nonwoven fibers, where major portions of fibers have specified fiber orientations

摘要

The insulation layer (3) is formed by multi-layered fabric made of nonwoven fibers (7). The major portions of the fibers have specified fiber orientations. The fiber orientations are aligned in the longitudinal direction of the fibers, and are designed parallel to an outer surface (8) or inner surface (9) and in the vertical direction relative to a longitudinal front surface (10).