LOW-TEMPERATURE LIQUID STORAGE TANK, MANUFACTURING METHOD THEREFOR, AND THERMAL SHOCK REDUCTION METHOD

To reduce thermal shock transmitted to a first foamed resin layer coated on an inside surface of an outer tank of a low-temperature liquid storage tank.SOLUTION: In a low-temperature liquid storage tank 100, an under-blown layer 12, a first foamed resin layer 13, and a second foamed resin layer 14 a...

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Hauptverfasser: ITO KAZUTAKA, SAITO TATSUKI, IKUMA KENJI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To reduce thermal shock transmitted to a first foamed resin layer coated on an inside surface of an outer tank of a low-temperature liquid storage tank.SOLUTION: In a low-temperature liquid storage tank 100, an under-blown layer 12, a first foamed resin layer 13, and a second foamed resin layer 14 are laminated on the inner surface of an outer tank 30. Both the first foamed resin layer 13 and the second foamed resin layer 14 are hard urethane foam. The second foamed resin layer 14 has more cells Q having a continuous open cell structure than the first foamed resin layer 13 does. Most of the cells Q having an open cell structure in the second foamed resin layer 14 communicate in a plane direction.SELECTED DRAWING: Figure 4 【課題】低温液貯槽の外槽の内側面にコーティングされた第1発泡樹脂層に伝わる冷熱衝撃の緩和を図ることが求められている。【解決手段】本開示の低温液貯槽100では、外槽30の内面に、下吹き層12、第1発泡樹脂層13、第2発泡樹脂層14が積層されている。第1発泡樹脂層13と第2発泡樹脂層14とは共に硬質ウレタンフォームである。第2発泡樹脂層14は、第1発泡樹脂層13よりも、連通した連続気泡構造を有する気泡Qを多く有している。第2発泡樹脂層14における連続気泡構造を有する気泡Qは、多くが面方向に連通している。【選択図】図4