Abstract: An objective of the present invention is to provide a method for producing a cork stopper by compression molding cork grains, which can provide a cork stopper excellent in sealability and safety. There is provided a method for producing a cork stopper, comprising: mixing cork grains and an adhesive; compression molding the mixture to give an intermediate; and then heating the intermediate to expand the cork grains.

Abstract: An objective of the present invention is to provide a method for producing a cork stopper by compression molding cork grains, which can provide a cork stopper excellent in sealability and safety. There is provided a method for producing a cork stopper, comprising: mixing cork grains and an adhesive; compression molding the mixture to give an intermediate; and then heating the intermediate to expand the cork grains.

Abstract: A cork stopper is coated by a resin coating layer, having a columnar cork stopper body constituted with a molded cork body, and a resin coating layer covering an outer surface of the cork stopper body. The resin coating layer has a resin adhesion layer directly adhered onto the outer surface of the cork stopper body, and a resin layer adhered onto the outer surface of the cork stopper body with the resin adhesion layer interposed therebetween, and the resin coating layer on a circumferential face of the cork stopper body has a layer thickness from 100 to 240 ?m.

Abstract: A cork stopper coated with a resin layer having a columnar cork stopper body formed by a compression molding of a cork granule with a binder resin, and a resin coating layer covering an outer circumferential surface of the cork stopper from an end side to another end of the cork stopper body along an axial direction. The cork stopper body and the resin coating layer constitute a core portion, and the core portion, when being pressed in a hollow tubular portion with a tightening allowance of 1.5 mm, experiencing a compression stress of 100N to 300N in case of a moisture content ratio of the core portion being 6 percent by weight and experiencing a compression stress 100N to 150N smaller than that in case of a moisture content ratio of the core portion being 2 percent by weight.