Abstract: Provided is a packaging body having excellent pressure resistance. The packaging body includes a front surface film, a rear surface film, an adhesive layer on the front surface film, and a seal on the rear surface film. A closed section is formed at a first longitudinal direction-end side and a tightly sealed section is formed at a second longitudinal direction-end side. The tightly sealed section includes at least a layered structure I in which the front surface film, rear surface film, and adhesive layer are stacked in an order of adhesive layer/front surface film/rear surface film/rear surface film/front surface film/front surface film/rear surface film, and a layered structure II in which these films are stacked in an order of adhesive layer/rear surface film/front surface film/front surface film/rear surface film in a packaging body thickness direction. The layered structure I and layered structure II are covered by the seal.

Abstract: Provided is a packaging body having excellent pressure resistance. The packaging body includes a front surface film, a rear surface film, an adhesive layer on the front surface film, and a seal on the rear surface film. A closed section is formed at a first longitudinal direction-end side and a tightly sealed section is formed at a second longitudinal direction-end side. The tightly sealed section includes at least a layered structure I in which the front surface film, rear surface film, and adhesive layer are stacked in an order of adhesive layer/front surface film/rear surface film/rear surface film/front surface film/front surface film/rear surface film, and a layered structure II in which these films are stacked in an order of adhesive layer/rear surface film/front surface film/front surface film/rear surface film in a packaging body thickness direction. The layered structure I and layered structure II are covered by the seal.

Abstract: In order to provide a check valve capable of sufficiently suppressing the mixing of air into the container even if a certain impact is applied to the container and also capable of stably maintaining good pouring of the content, a check valve 10 of the invention is formed of rubber material and manufactured by integral molding. The check valve 10 has a tubular main body 1 having openings 1a and 1b at opposite ends, a lid 3 arranged to close one opening 1a of the main body 1, and a hinge 5 that connects the main body 1 and the lid 3. The lid 3 has a projection 3a on the side surface 3b, the projection 3a coming in contact with a peripheral edge of the opening 1a of the main body 1.