Posts Tagged PET Preform Injection Molding

In order to understand the PET bottle neck finish dimensions & PET bottle neck types, we need to know a number of things before talking the details. PET Bottle Neck Definition and Measurements The neck of the bottle is defined by its total height, its inner diameter, its outer diameter and its thread. The dimensions of a neck (expressed in mm). PET Bottle Neck Finish Dimensions Measurements “T” Dimension – The outside diameter of the thread. The tolerance range of the “T” dimension will determine the mate between bottle and closure. “E” Dimension – The outside diameter of the neck. The difference between the “E” and “T” dimensions divided by two determines the thread depth. “I” Dimension – The inner diameter of the bottle neck. Specifications require a minimum “I” to allow sufficient clearance for filling tubes. Linerless closures, with a plug or land seal, and dispensing plugs and fitments require a controlled “I” dimension for a proper fit. “S” Dimension – Measured from the top of the finish to the top edge of the first thread. The “S” dimension