摘要:
A plastic container having a base portion adapted for vacuum pressure absorption. The base portion including a contact ring upon which the container is supported, an upstanding wall and a central portion. The upstanding wall being adjacent to and generally circumscribing the contact ring. The central portion being defined in at least part by a central pushup and an inversion ring which generally circumscribes the central pushup. The central pushup and the inversion ring being moveable to accommodate vacuum forces generated within the container.
摘要:
A plastic container for retaining a commodity during a high temperature pasteurization or retort process. The container includes a finish defining an aperture for receiving the commodity, a body portion generally extending downward from the finish portion, and a base portion generally extending inward from the body portion and closing off the bottom of the container. The body portion itself includes a sidewall having a crystallinity of greater than 30% and a shoulder portion flaring outward, from a generally transverse plane defined by the mouth of the container, at an angle of about 15° or less.
摘要:
A blow molding machine for producing a biaxially oriented, heat set plastic container, including a blow mold; a high-pressure gas source; a high-temperature gas source; a fluid source; a mixer coupled to the high-temperature gas source and to the fluid source; a blow core assembly having an exhaust; and a controller coupled to the high-pressure gas source, to the, high-temperature gas source, and to the fluid source. The PET containers produced by the machine have an average sidewall crystallinity greater than about 30%, which allows the PET container to maintain its material integrity during any subsequent pasteurization or retort process of the contents in the PET container, and during shipment of the PET container.
摘要:
A method for providing a thermally processed commodity in a plastic container. The container is exposed to elevated temperatures to form an—intermediate finish section. A commodity is dispensed within the plastic container. A closure engages the intermediate finish section. The container and the commodity are thermally processed. The finish section being within a predetermined range whereby the finish section and the closure result in retaining a hermetic seal.
摘要:
A plastic container for retaining a commodity during a high temperature pasteurization or retort process. The container includes a finish defining an aperture for receiving the commodity, a body portion generally extending downward from the finish portion, and a base portion generally extending inward from the body portion and closing off the bottom of the container. The body portion itself includes a sidewall having a crystallinity of greater than 30% and a shoulder portion flaring outward, from a generally transverse plane defined by the mouth of the container, at an angle of about 15° or less.
摘要:
A method for providing a thermally stable finish in a plastic container. A finish section is reformed, which in part requires crystallizing a portion of the finish. The finish section has a finish dimension that shrinks to an intermediate finish dimension. Thereafter, the crystallized finish is annealed such that the intermediate finish dimension conforms to a predetermined range.
摘要:
A method for producing a biaxially oriented, heat set plastic container, including the steps of providing a plastic preform within a mold cavity; expanding and stretching the plastic preform into conformity with the surfaces defining the mold cavity to form a biaxially oriented plastic container; inducing crystallinity in the plastic container by using convection heat transfer to heat a surface of the plastic container to a temperature of at least 120° C.; and removing the plastic container from the mold cavity. The PET containers produced by the method have an average sidewall crystallinity greater than about 30%, which allows the PET container to maintain its material integrity during any subsequent pasteurization or retort process of the contents in the PET container, and during shipment of the PET container.
摘要:
A pressure-motion compensating diaphragm for air and liquid tight sealing, in combination with a cap, of a container. The diaphragm has (1) an edge engaging at least one of the cap and the container, and positioning the diaphragm horizontally in the container proximate the neck of the container and under the cap; (2) a center deflector button; and (3) a plurality of silfon tori segments extending from the edge to the center deflector button. The dimensions and geometries of the edge, center deflector button, and tori segments are predetermined to compensate uniquely for forces applied to the diaphragm and created by pressure changes inside and outside the container that occur as the container is filled with a product and processed through filling, pasteurization, or cooling steps. Also provided is an apparatus including the cap, the container, and the diaphragm for releasably storing the product.
摘要:
A blow-molded PET container comprising a wall having a density of between about 1.370 g/cc and 1.385 g/cc, a heat-induced crystallinity of from about 18% to about 25%, and a strain-induced crystalinity of from about 55% to about 75%, wherein the PET container, when filled with a liquid having a temperature of from about 100° C. to about 132° C. or when subjected to a pasteurization or retort process, will not experience a change in volume of greater than 3%.