PROBLEM TO BE SOLVED: To provide an airtight pressure-resistant container having high pressure-resistant performance which solves the problem that when a seal structure having the same material as that of a container is provided therein, a space between an annular seal material and a container is welded, the welded portion becomes a starting point of breakage at the time of pressure application and pressure-resistant performance is lowered.SOLUTION: An airtight pressure-resistant container is a container formed by welding a cylindrical bottle 2 formed of a thermoplastic resin material, a lid body 3 and an annular seal material 4, where a contact area of the lid body 3 and the annular seal material 4 is smaller than a contact area of the cylindrical bottle 2 and the annular seal material 4.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】気密性耐圧容器において、内部に容器と同材料のシール構造を設けた場合、環状シール材と容器の間が溶着し、その溶着箇所が圧力印加時に破壊の起点となり耐圧性能が低下する課題があった。そこで、高い耐圧性能を有する気密耐圧容器を提供する。【解決手段】熱可塑性樹脂材からなる筒状ボトル２と、蓋体３と、環状シール材４を、溶着してなる容器であって、蓋体３と環状シール材４の接触面積が筒状ボトル２と環状シール材４の接触面積よりも小さい気密性耐圧容器。【選択図】図２
