Abstract: A plastic pressure container has an essentially cylindrical container body with an opening closable in a pressure-tight manner by a valve attachment for dispensing a filling product. An interior plunger is arranged in a longitudinally displaceable manner along a longitudinal axis to subdivide the container body into a receiving chamber adjacent to the opening for the filling product and into a separated reservoir in a pressure tight manner, for a pressure medium. The plunger includes two circumferential sealing lips separated in the axial direction. An upper sealing lip extends into the receiving chamber and a lower sealing lip extends into the reservoir, and these are pressed in a fluid-tight manner onto an inner wall which delimits the interior of the container body, by pressure in the receiving chamber and reservoir.

Abstract: A plastic pressure container has an essentially cylindrical container body with an opening closable in a pressure-tight manner by a valve attachment for dispensing a filling product. An interior plunger is arranged in a longitudinally displaceable manner along a longitudinal axis to subdivide the container body into a receiving chamber adjacent to the opening for the filling product and into a separated reservoir in a pressure tight manner, for a pressure medium. The plunger includes two circumferential sealing lips separated in the axial direction. An upper sealing lip extends into the receiving chamber and a lower sealing lip extends into the reservoir, and these are pressed in a fluid-tight manner onto an inner wall which delimits the interior of the container body, by pressure in the receiving chamber and reservoir.

Abstract: The invention relates to a process for coating a rigid foam molding on both sides with a plastic film, wherein a) the molding is arranged and fixed in a spacing ratio between films in a capsule, b) the air is evacuated from the capsule and c) the films are as a result pressed onto opposite surfaces of the molding while a reduced pressure is maintained between the films.

Abstract: The invention relates to a method of coating a fiber-cement or concrete molding with a polymeric film, which comprises a) placing and securing the molding in a capsule, the polymeric film being mounted between capsule wall and molding, b) evacuating the air in the chamber between polymeric film and molding, c) heating the polymeric film, d) letting down a second chamber between polymeric film and capsule wall to atmospheric pressure with external air, and e) thereby pressing the polymeric film onto the molding, and maintaining a vacuum during this pressing operation; and also to fiber-cement and concrete moldings coated using this method.