Patent ID: 6981617

Claim:
An extrusion container comprising: a blow-molded, bottle-shaped, main container body, comprising: in turn, a separably laminated outer shell layer, forming an outer container body that is squeeze-deformable and has a restoration-enabling flexibility, and inner layer, forming an inner container body that contains contents in its interior and is deflated inwardly and deformed in a volume-reducing manner by decrease of internal pressure, and an extrusion cap body, having an opening and being fitted to a mouth part of said main container body, where said extrusion cap body is provided with a first non-return function part, having a function of preventing the reverse flow of the contents from said opening into the inner container body and the inflow of external air, and said outer container body has an external air introduction part for introduction of external air into an interlayer part between said outer shell layer and inner layer, said external air introduction part being arranged to be in communication with a second non-return function part, having a function of sealing air in the interlayer part during the squeezing process, and at least two adhesive bands of longitudinal band form, each of which adheres and fixes said outer shell layer and inner layer together along the entire height range while avoiding the external air introduction part, wherein the width of each of said adhesive bands is set so as to disable complete closure of the plane cross section by free deformation of non-adhered inner layer parts, which are the inner layer parts between said adhesive bands, and wherein the rigidity of the outer shell layer is set so that, in the state where free deformation of said non-adhered inner layer parts reaches a limit due to decrease of the contents and tension acts at said non-adhered inner layer parts and the side end parts of the adhesive bands, the outer shell layer is deformed in a region of the adhesion bands in a direction toward the interior of said main container body by tension generated by further normal squeezing operation by a human hand, to reduce a volume of a contents passage formed between the inner layer in the region of the adhesion bands and said non-adhered inner layer parts.