Patent ID: 8317056

Claim:
A liquefied natural gas tank, comprising: an interior wall configured to contact a liquefied natural gas; a first heat-insulation structure; a second heat-insulation structure interposed between the first heat-insulation structure and the interior wall; and wherein the first heat-insulation structure comprises: a first insulation wall comprising a first surface, a second insulation wall laterally abutting the first insulation wall and comprising a second surface, a joint sheet comprising a first portion and a second portion, the first portion being placed over the first insulation wall, the second portion being placed over the second insulation wall, and a bonding layer placed between and bonding the first portion of the joint sheet and the first insulation wall, the bonding layer further placed between and bonding the second portion of the joint sheet and the second insulation wall, wherein the bonding layer comprises a bonding material and at least one device embedded in the bonding material, wherein the at least one device comprises two opposing surfaces, one of which contacts the joint sheet and the other of which contacts the first insulation wall, wherein the at least one device is configured to inhibit cracks from propagating in the bonding layer, wherein the bonding of the joint sheet with the first and second insulation walls forms a substantially liquid-tight sealing between the first and second insulation walls.