Ever wonder how PET plastic bottles and jars are made? Turns out it is a little different then other types of plastic bottles (Extrusion Blow Molding, Injection Blow Molding, etc.). Known for it’s quality and environmental friendliness, PET plastic bottles and jars are made using a unique process called Stretch Blow Molding, or SBM.
There are two SBM manufacturing techniques: Single Stage and Two Stage Process. Both divided into three similar and distinct steps: Preform, Conditioning, and Blow & Stretch. What’s really interesting is that the preform, a test tube shape plastic preform, can be stored in warehouse for later production. Since these preforms already have the neck finish portion shaped, the conditioning and blow & stretch stages focuses on blowing the preforms into it’s final shape that you and I use.
If you want a customized PET plastic bottle shape and color, please visit our parent company O.Berk, for detailed comparison of single stage and two stages SBM process.
For our stock PET plastic bottles and jars, please click here.