SECONDARY GAS BARRIER FOR LIQUEFIED GAS STORAGE TANK HAVING FLEXIBILITY AND FATIGUE RESISTANCE PERFORMANCE IMPROVED BY MATERIAL CHANGE OF REINFORCING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a secondary gas barrier for a liquefied gas storage tank having flexibility and containing a reinforcing material fabric weaved by fiber yarn selected from two or more kinds among a glass fiber, a carbon fiber, an alamido fiber and a synthetic fiber in the present invention concerning the secondary gas barrier for the liquefied gas storage tank having the flexibility, and provide the secondary gas barrier for the liquefied gas storage tank having flexibility and containing the reinforcing material fabric weaved so that two kinds of fiber single yarn selected from among the glass fiber, the carbon fiber, the alamido fiber and the synthetic fiber or hybrid fiber yarn formed by 2 twisted yarn of single twist yarn may be contained in weft or/and warp.SOLUTION: A secondary gas barrier of the present invention uses a reinforcing material fabric obtained by mixing two kinds or more selected from among a glass fiber, a carbon fiber, an alamido fiber and a synthetic fiber, and thereby the repeated fatigue resistance performance is greatly improved even under cryogenic temperatures, and in the ultimate, there is an effect to solve a problem in which the repeated loading applied to the secondary gas barrier is increased as the thickness of the foamed body (LNGC Foam) of the liquefied natural gas carrier is increased.SELECTED DRAWING: Figure 1