Abstract:
A plastic blow molded container (10) includes a hollow body portion (11), an upper dispensing end (14) having a dome (15) and spout (16), and a lower freestanding base (18). The container includes a main layer (19) of virgin polyethylene terephthalate that defines the upper dispensing end (14) and partially defines the hollow body portion (11) and the lower freestanding base (18), and the container also includes a gas barrier liner (20) that cooperates with the main layer (19) to define the freestanding base (18) and at least a portion of the body portion (11). The gas barrier liner (20) has an upper end (21) located below the dispensing end (14) and has a wall thickness that is less than 0.25 of the adjacent wall thickness of the polyethylene terephthalate main layer (19).
Abstract:
A container (10), desirably blow molded or extrusion molded, said container having barrier properties and including an upper wall portion (12) having an opening (13), an intermediate sidewall portion (14) positioned beneath the upper wall portion (12), and a base portion (16) positioned beneath the intermediate sidewall portion (14) to support the container. The container (10) includes a molded first layer (22) having an inner surface an an outer surface formed from high density polyethylene, and a carbon coating (26) formed on the inner surface of the first layer and adhered thereto and substantially coextensive with the first layer, wherein said carbon coating (26) has a thickness of less than about 10 microns.
Abstract:
A multilayer preform (26a, 26b, 26c) used for plastic blow molding and a method for making the preform provides an inner layer (28) of polyethylene naphthalate and an injection molded outer layer (30) of polyethylene terephthalate which has reduced transmission of gas upon blow molding as a container due to the gas barrier provided by the inner layer of polyethylene naphthalate. The inner layer (28) of polyethylene naphthalate by itself or along with a further inner layer (32) of virgin polyethylene terephthalate is thermoformed prior to the injection molding of the outer layer (30) of polyethylene terephthalate. A minimal amount of the polyethylene naphthalate which is relatively expensive can be utilized due to the thermoforming and injection molding as disclosed.
Abstract:
Various embodiments of a process for making hollow thermoplastic articles (180) are provided. In one embodiment, a process for producing hollow thermoplastic article (180) includes placing a sock preform (111, 113, 115, 117) of a first polymer composition about a core pin (110, 112, 114, 116) and injection molding a molten parison of a second polymer composition that is different than the first polymer composition into an injection mold cavity (150, 152, 154, 156) and onto the sock perform. The injection molding process produces an injection preform having two different material compositions. The process further include blow molding the injection preform to produce a hollow thermoplastic article having an interior surface of the first polymer composition and an exterior surface of the second polymer composition.
Abstract:
A blow molded container (10) having barrier properties and including an upper wall portion having an opening (13), an intermediate sidewall portion (14) positioned beneath the upper wall portion (12); and a base portion (16) positioned beneath the intermediate sidewall to support the container. The container includes a molded outer layer (24) having an inner surface (22) and an outer surface formed from at least 40% of recycled plastic, and a carbon coating formed on the inner surface of the outer layer (26) and adhered thereto and substantially coextensive with the outer layer, wherein said carbon coating has a thickness of less than about 10 microns.
Abstract:
Various embodiments of a process for making hollow thermoplastic articles are provided. In one embodiment, a process for producing hollow thermoplastic article includes placing a sock preform of a first polymer composition about a core pin and injection molding a molten parison of a second polymer composition that is different than the first polymer composition into an injection mold cavity and onto the sock perform. The injection molding process produces an injection preform having two different material compositions. The process further include blow molding the injection preform to produce a hollow thermoplastic article having an interior surface of the first polymer composition and an exterior surface of the second polymer composition.
Abstract:
A plastic blow molded container (10) and method for making the container with a hollow body portion (11), an upper dispensing end (14), and a lower freestanding base (18). The container (10) is biaxially oriented and has an outer layer (19) and an inner liner (20). The inner liner (20), which is a virgin resin having a nominal wall thickness that is less than 0.25 of the total wall thickness of the container, and the outer layer (19) is post consumer recycled, green colored polyethylene terephthalate. The virgin resin of the inner liner (20), which is preferably polyethylene terephthalate, polyethylene naphthalate or blends thereof with each other or with other resins, is extruded and then blow molded to form an inner liner about which the post consumer recycled, green colored polyethylene terephthalate is injection molded to provide the outer layer.
Abstract:
The present invention is directed to a method of manufacturing an article, the method comprising providing a tubular body having a neck area, positioning a finish mold on the neck area in a molding apparatus, molding a molten plastic material between the neck area of the tubular body and the finish mold, allowing the molten plastic material to solidify, and removing the finish mold.
Abstract:
Disclosed is a preferred mold design for producing plastic, molded preforms, which may be blow-molded into a container of a final, desired shape. A preferred mold includes a temperature control system for maintaining the preform mold at a desired temperature. The temperature control system can pass fluid through channels (302, 330, 403) within the preform mold to cool plastic that is injected into the preform mold. The mold comprises a neck finish mold (402) , the neck finish mold configured to transfer heat away from the molding surface toward a channel (403) conveying a working fluid. A heat transfer member (212) may be at least partially positioned within the channel to transfer heat to the working fluid. In some embodiments, the mold comprises a high heat transfer material .