| 摘要 |
PROBLEM TO BE SOLVED: To provide an expansion spacing water cutoff material, hardly causing wavy uneven deformation of becoming a sediment deposit factor of its surface layer, without water leakage and falling-off of the water cutoff material caused by breaking of an adhesive fixation part due to shearing expansion/contraction deformation, and without water leakage by adhesion breaking when deformation strain stress occurs due to high expansion/contraction deformation stress of the water cut off material, in expansion/contraction deformation of the expansion spacing water cutoff material by expansion displacement in an expansion spacing.SOLUTION: An expansion spacing water cutoff material is provided by integrally laminating a protective layer C composed of a foaming continuous air bubble sponge material, a water cutoff layer Q composed of a hydrophobic foaming continuous air bubble sponge material of communicating among air bubbles by a coating film crack formed by rupturing an inter-air bubble membrane and a backup layer B composed of a foaming continuous air bubble sponge material. |
