Patent ID: 7490990

Claim:
An inner bag to be loaded in an approximately cylindrical transport tank in a removable manner, comprising: an inner bag body having an envelope shape, wherein length of said inner bag body is IL, width thereof is IW, an inner peripheral length of said transport tank in a longitudinal cross-sectional surface in a longitudinal direction is TLt, and the inner peripheral length of said transport tank in the longitudinal cross-sectional surface in a width direction is TLr, the following conditions are satisfied: 0.47 ·TLt≦IL ≦0.6 ·TLt, 0.47 ·TLr≦IW ≦0.6 ·TLr ; and a second supply-discharge opening to be fitted in a first supply-discharge opening formed in one end of a lower portion of said transport tank, filler being filled in said inner bag body through said second supply-discharge opening.