A preform-molding device has a nozzle section including three cylindrical layer-forming flow channels, which include an inner flow channel and an outer flow channel for forming the substrate layers of the main resin, and a middle flow channel for forming the intermediate layer, and also includes a predetermined number of vertical blocking rib pieces disposed at a downstream end of the middle flow channel, in parallel in the circumferential direction, so that the intermediate layer would be segmented in the circumferential direction into a predetermined number of vertically running streams, wherein flow behavior of the intermediate-layer resin flowing through the middle flow channel is adjusted by positioning the vertical blocking rib pieces in the circumferential direction so as to minimize a difference in height between a maximum height point and a minimum height point that appear in a leading edge of the intermediate layer of the preform.

The present invention relates to a multilayer container preform and a multilayer container, said preform or container comprising a base, a body and a neck finish, said base and body comprising an outer layer defining an exterior surface, an inner layer defining an interior surface and interior space, and an intermediate layer disposed between the outer layer and the inner layer, said outer layer and said inner layer comprising a primary material selected from the group consisting of a 2,5-furandicarboxylate polyester or co-polyester or a blend thereof, and said intermediate layer comprising a secondary material different from the primary material, but compatible with the primary material. The invention relates to methods of producing such a multilayer container preform and multilayer container

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 producing blow-molded structures where a preform is provided that encloses a cavity and has a preform wall limiting the cavity. The preform is placed into a blow mold and formed to a blow-molded structure, wherein the blow-molded structure has a structural wall. The preform wall or structural wall comprises an inner layer and an outer layer.

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.