Abstract: A method for making a partially crystalline, biaxially oriented heat set hollow polyethylene terephthalate free standing container from a hollow parison having an open end and a closed end including engaging the open end of a plastic parison which is at a temperature within its molecular orientation temperature range, positioning a mold base in axial alignment with said engaged hot parison, enclosing a hot mold about the mold base, the mold being at heat setting temperature and the mold base being at a temperature preferably significantly lower than the mold, expanding the plastic parison within the hot mold and mold base by internal pressurization to induce biaxial orientation of the plastic parison and force the plastic parison into intimate contact and conformance with the hot mold and to maintain contact by such internal pressurization between the mold and mold base and the biaxially oriented container for a time sufficient to induce partial crystallization in the side wall and base of the biaxially orien

Abstract: A method and apparatus for making a partially crystalline, biaxially oriented heat set hollow plastic container from a hollow parison having an open end and a closed end including engaging the open end of a plastic parison which is at a temperature within its molecular orientation temperature range, enclosing the hot parison in a hot mold, which is at heat setting temperature, expanding the plastic parison within the hot mold by internal pressurization to induce biaxial orientation of the plastic parison and to induce partial crystallization in the biaxially oriented container, exhausting the blow molding fluid while continuously introducing a cooling fluid such as liquid carbon dioxide into the biaxially oriented container and continuously removing the cooling fluid while the hot mold is closed for a period of time, opening the hot mold while continuing to introduce, circulate and remove coolant fluid for a predetermined period of time until the container is cooled sufficiently to prevent significant shrinka

Abstract: A method including engaging the open end of a first plastic parison which is at a temperature within its molecular orientation temperature range, enclosing a hot mold which is at heat setting temperature about the parison at a first position, simultaneously enclosing a cold mold at a second position about a container previously blown in the hot mold to cool the previously blown container, expanding the plastic parison within the hot mold by internal pressurization through the open end to induce biaxial orientation of the plastic parison and force the plastic parison into intimate contact and conformance with the hot mold and to maintain contact by such internal pressurization between the mold and biaxially oriented container for a time sufficient to induce partial crystallization in the biaxially oriented container, moving the hot mold and the cold mold in unison to bring the hot mold to the second position and the cold mold to a third position during the expanding of the parison within the hot mold and durin

Abstract: A method and apparatus of forming a hollow partially crystalline heat set biaxially oriented polyethylene terephthalate container having a hemispherical base comprising blowing a heated parison at orientation temperature outwardly against the confines of a mold which is at heat setting temperature wherein the side wall and the major portion of the base of the container are subjected to a heat setting temperature and the center of the base of the container is subjected to a temperature not greater than 150.degree. C. so that the central portion is crystallized a substantially lesser amount than the side wall and the major portion of the base. The container is then quenched. The resultant container can be formed at a rapid cycle and has good drop impact properties and obviates the problems of sticking to the hot mold or blow out when the hot mold is opened.

Abstract: A method for making a partially crystalline, biaxially oriented heat set hollow plastic container from a hollow poly(ethylene) terephthalate parison having an open end and a closed end comprising engaging the open end of a plastic parison which is at a temperature within its molecular orientation temperature range, enclosing a hot mold about the hot parison, the mold being at heat setting temperature, expanding the plastic parison within the hot mold by internal pressurization to induce biaxial orientation of the plastic parison and force the plastic parison into intimate contact and conformance with the hot mold and to maintain contact by such internal pressurization between the mold and the biaxially oriented container for a time sufficient to induce partial crystallization in the biaxially oriented container, maintaining a lower internal pressurization of the container to prevent significant shrinkage, opening the hot mold while maintaining engagement of the open end of the blown hollow container, enclosin

Abstract: A method for making a partially crystalline, biaxially oriented heat set hollow plastic container from a hollow parison having an open end and a closed end comprising engaging the open end of a plastic parison which is at a temperature within its molecular orientation temperature range, positioning a mold base in axial alignment with said engaged hot parison, enclosing a hot mold about the mold base, the mold being at heat setting temperature, expanding the plastic parison within the hot mold and mold base by internal pressurization to induce biaxial orientation of the plastic parison and force the plastic parison into intimate contact and conformance with the hot mold and to maintain contact by such internal pressurization between the mold and the biaxially oriented container for a time sufficient to induce partial crystallization in the biaxially oriented container, lowering the internal pressure in the container, opening the hot mold while maintaining engagement of the open end and engagement of the mold b

Abstract: A multilayer biaxially oriented heatset article and method of making forming a preform comprising an outer layer and an inner layer of poly(ethylene terephthalate) (PET), an intermediate layer of olefin-vinyl alcohol copolymer, a layer of adhesive laminating the olefin-vinyl alcohol copolymer layer and the outer layer and a layer of adhesive laminating the inner olefin-vinyl alcohol copolymer layer and the inner layer. The preform is then heated to orientation temperature and blown against a heatset hot mold to produce an article such as a container that has high barrier properties, improved thermal stability, i.e., capable of being hot filled at elevated temperatures, have layer uniformity, good interlayer adhesion., good transparency and is light in weight.

Abstract: A high barrier heatset intimate fusion blend article is disclosed where the article includes a blend of a high barrier copolyester, formed from terephthalic acid, ethylene glycol and 1,3 bis(2-hydroxyethoxy) benzene, and poly(ethylene terephthalate) (PET). The PET/copolyester blend articles are formed using a blowmolding and heatsetting process to rapidly achieve a high percentage of crystallinity of the PET in the article. The articles have excellent gas barrier and mechanical strength properties, high thermal stability and remain optically clear after heatsetting.

Abstract: A hollow transparent delamination resistant heatset multilayer article is disclosed where the article includes at least one barrier layer containing a copolyester formed from terephthalic acid, ethylene glycol and 1,3 bis(2-hydroxyethoxy) benzene directly adhered to at least one layer containing poly(ethylene) terephthalate (PET). The multilayer articles are blowmolded using a heatsetting process. The heatset multilayer articles retain high gas barrier properties, uniform thickness in layers, and desirable mechanical strength properties even after the heatsetting process. Also, the multilayer heatset articles have excellent interlayer adhesion without the need for an adhesive layer, high thermal stability, and remain optically clear after the heatsetting process.