A plastic aerosol container includes a main body portion that is constructed and arranged to withstand aerosol pressurization within a range that is about 50-300 psig. The plastic aerosol container also includes a finish portion that is unitary with the main body portion. The finish portion may be threaded or unthreaded. The finish portion has a side wall, an upper sealing surface, at least one helical thread and a support ledge beneath the helical thread. Reinforcement structure is positioned beneath the support ledge for reinforcing the finish portion against deformation due to the pressurization. A method of stabilizing a plastic aerosol container is also disclosed.

Preform (1) made of a plastic material for the manufacturing of a container (2) by blow molding or stretch-blow molding, the preform (1) including a sidewall (20) extending along a main axis (Z), an open neck (4) and a substantially hemispherical closed bottom (21) having a thickness (T) which varies at least locally around the main axis (Z).

A stretch blow-molded plastic container, including a container body, one longitudinal end of which is closed by a container bottom and to whose other longitudinal end is connected a shoulder section; and a container neck, which connects to the shoulder section, the shoulder section having at least two hinge-like areas that run in a circumferential direction, and which areas are arranged at a distance (a) from one another and in each case have a wall thickness (v, w) that is reduced compared to the adjoining areas, the stretch blow-molded plastic container having a total stretching ratio of greater than 11 for a longitudinal stretching ratio of 2.5 to 3.5.

There is provided a system, a method and preform suitable for executing liquid forming of the preform into a final-shaped container. The present technology includes various improvements to methods, apparatuses, and systems for forming final-shaped containers from preforms using a liquid destined to be contained in the final-shaped container.

A method of manufacturing a pressure vessel that includes heating a preform formed of a thermoplastic polymer, inserting a blow pin assembly that includes a bung portion and a plunger portion into an opening of the heated preform, clamping the heated preform between the bung portion and sections of a blow mold, extending the plunger portion into an interior of the heated preform to stretch the heated preform in the blow mold, and blowing air into the stretched preform under pressure to form the pressure vessel such that: (a) the pressure vessel includes a tank having a neck portion, a cylindrical body portion having a diameter of at least about 200 mm, and a bottom portion, (b) at least the thermoplastic polymer in the cylindrical body portion is biaxially oriented, and (c) threads are formed in the neck portion. Also a pressure vessel formed in accordance with the method.

Multi-barrier bottles having tabbed preforms, as well as methods of forming the same are disclosed. A tabbed preform includes an elongate body extending into a cavity of a first barrier, where the cavity is defined by at least one piece having a recess therein. The tabbed preform further includes at least one preform extension piece extending from the elongate body at a predetermined distance from a top surface of the elongate body. The at least one preform extension piece is sized and shaped to correspond to a size and a shape of the recess.

Polyesters compositions comprising gas barrier enhancing additives and containers comprising such polyester compositions are provided herein. Also provided are methods for preparing polyester containers comprising said gas barrier enhancing additives. The polyester containers of the present invention exhibit decreased permeability to gases thereby providing improved shelf-life.

A method includes injection molding a preform using a two phase injection system having a first phase in which a material is injected into the preform and a second phase in which the material is injected into the preform. The preform is disposed in a mold. The preform is blow molded into an intermediate article. The intermediate article is trimmed to form a finished container. The first phase includes injecting a material into the preform to form a single layer of the preform and the second phase includes injecting the material to form inner and outer layers and an intermediate layer between the inner and outer layers. The inner and outer layers include the material and the intermediate layer includes at least one additive. Finished containers are disclosed.

A method for manufacturing a thermoplastic container may include locally heating a middle zone of a thermoplastic tube; gripping the tube on either side by using retaining members; pulling the tube apart, causing a middle zone to narrow; pushing the inner wall of the middle zone against each other to obtain a closure; and cutting through the closed-off middle zone to obtain two separate tubular parts. Further is provided a system for pulling apart a tube, the system may include a first retaining member which is provided for insertion into the first zone via the first end and a second retaining member provided for insertion into the second zone via the second end, each retaining member being adjustable between a first position in which the retaining member fits inside the tube and a second position in which, in use, the retaining member exerts a pressure on the inner wall of the tube.

A method, system, and preform for liquid forming of the preform into a final-shaped container using the liquid to be contained in the final-shaped container. The preform undergoes a stretching step to a size less than the size of a base of the final-shaped container, before being relocated and stretched to the final shape by the liquid. A stretch rod sealably connects with an interior surface of the preform to partially isolate a gate portion of the preform. The isolation is effected by a portion of the inner surface of the preform extending inwardly, or by a deformable member on the stretch rod which can selectively extend outwardly to contact the interior surface of the preform. The stretch rod includes a selectively heatable tip to heat the gate portion of the preform. The gate portion of the preform includes inner, outer, and core layers which comprise a material configured to affect the thermal properties of the gate portion.