The mark on a bottle where two halves of a mold meet in closing.

The property of a material that will permit its being bent or twisted without breaking.

A surface coating to improve permeation resistance and/or protect the container from scuffing.

Protection from deterioration or admittance of moisture or other elements (such as oxygen and other gases) through the package material. Barriers can consist of an additive to the resin or a coating o [..]

A chemical substance that can be added to a plastic resin to minimize or prevent the effects of oxygen attack on the plastic (e.g. yellowing or degradation).

Filling to a specific level in a clear or transparent package where the fill level is visible.

The bottom of the bottle or jar, often marked with an SPI plastic identification code and indentations (called deco ramps or lugs) used to orient a bottle during filling and labeling.

On Hinge-Guard/J-Cap style neck finishes, the collar of plastic beneath the neck area that snap-on caps rest against. On 2-stage PET bottles, the bead is known as a transfer bead, and provides a surfa [..]

A process in which a warm plastic parison or preform (hollow tube) is placed between the two halves of a mold (cavity) and blown into the desired shape. This improves the gas barrier, stiffness, clari [..]

The pressure required to form the parison or preform into the shape of the mold cavity, in a blow molding operation.