A preform, a synthetic resin container, and a method for manufacturing a synthetic resin container in which an air passage leading from an ambient air introduction hole to a trunk can be easily preserved. In the mouth, the inner body includes a large-diameter portion provided at an upper end thereof, and a small-diameter portion continuously extending below the large-diameter portion via a connecting portion. In the mouth, the outer body is provided with an ambient air introduction hole passing through the outer body, and a neck ring positioned within a height range of the small-diameter portion. The inner body is made of a crystalline resin, and a crystallized region is formed in part of the inner body, the crystallized region having a higher degree of crystallization than other regions.

A preform can be made from two different materials that do not bond together by a bi-injection process, using the same mold. First an outer preform can be fashioned first, then an inner preform molded through a center hole in the outer preform, and the preforms connected. Inner/outer preform materials can be different, e.g., PET/polyolefin or polyamide, or the same, e.g., PET/PET. To prevent mutual bonding during molding of the second, a non-stick coating can be sprayed on a surface portion of the first preform prior to molding, the second. Manufacturing order can be either outer/inner, or inner/outer, and the non-stick coating sprayed on the inside/outside of the perform first molded.

Preform (1) or preform assembly for blow molding a container (23), wherein the preform of preform assembly has a neck portion (4), a lid element (16) being provided at the neck portion, an opening extending into the neck portion, providing access to an internal space of the preform or preform assembly. Method for blow molding a container. Container blown from a preform or preform assembly.

An injection molded test-tube-shaped preform, which is subjected to biaxial stretch blow molding, includes a circumferential wall including a longitudinal strip-shaped portion that is made of a transparent or a semi-transparent B resin and that is formed in a longitudinal strip shape penetrating the circumferential wall in a circumferentially predetermined position in the circumferential wall over a predetermined height range. A remaining portion of the circumferential wall excluding the longitudinal strip-shaped portion is made of an A resin that is obtained by coloring a synthetic resin. A portion of the B resin constituting the longitudinal strip-shaped portion flows around an opposite side to the circumferentially predetermined position in which the longitudinal strip-shaped portion is formed, to be laminated in the vicinity of a portion of the circumferential wall made of the A resin that is close to an inner circumferential surface of the circumferential wall.

The invention is an integrally blow-moulded bag-in-container and preform for making it. The bag-in-container has an inner layer forming the bag and an outer layer forming the container, and a mouth fluidly connecting the volume defined by the bag to the atmosphere. The container further has at least one interface vent fluidly connecting the interface between inner and outer layers to the atmosphere, wherein the at least one vent runs parallel to the interface between inner and outer layers and opens to the atmosphere at a location adjacent to, and oriented coaxially with the bag-in-container's mouth. Processes for manufacturing a preform and a bag-in-container as defined above are defined too.

Container of a bag-in-container type, wherein a neck region of the container is provided with at least one opening extending substantially radially there through, into a space between the outer container and an inner container adjacent thereto, wherein the neck region is provided with coupling elements, preferably at opposite sides of the at least one opening, seen in circumferential direction, for coupling of a connecting device to the container for introducing a pressure fluid through the at least one opening into a space between the inner and outer container.

An aerosol container having an open neck at the top and a closed end bottom longitudinally spaced therefrom. The container has a valve cup and bag. The valve cup and bag are integral. The valve cup is attachable to the neck in sealing relationship. This arrangement provides for propellant to be disposed intermediate the container and bag. Product can be disposed in the bag for selective dispensing by a user actuated valve.

To solve a problem associated with formation of a transparent window portion in a biaxially stretch blow molded container by a nozzle structure of an injection molding apparatus, provided is a biaxially stretch blow molded container formed with a clearly transparent window portion in longitudinal strip shape by effectively preventing mixture of colored resin to window portion. Injection molding apparatus includes in nozzle portion a longitudinal groove flow path, wherein a transparent B resin flows. By, for example, reducing and increasing, respectively, the width and depth of the longitudinal groove flow path on the downstream side, and engraving slits in an inner mandrel and even in a front end portion of a stopper pin, flowability of the B resin in a horizontal direction is enhanced.

A syringe for use in a pressurized injection of a fluid includes a syringe barrel including a polymeric material having undergone expansion via blow molding. A preform for blow molding a blow molded syringe is described, the preform including a proximal end having a retention mechanism adapted to connect to the syringe to a powered injector, a distal end having a syringe outlet section, and a barrel section between the retention mechanism and the syringe outlet section, wherein the barrel section is adapted to be blow molded to form a cylindrical wall of a syringe barrel defined between the retention mechanism and the syringe outlet section.

Container comprising an inner container and an outer container with facing surfaces, wherein at least part of at least one of the facing surfaces has a surface roughness higher than about 0.1 Ra and/or wherein the difference in roughness of said facing surfaces is at least over a part more than about 0.1 Ra.