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Extrusion The simplest kind of blow molding is called blow molding. An extruder discharges a hot plastic tube, which is caught in a water-cooled mold.
After the molds are sealed, air is fed into the container through the top or neck, just like one does while blowing up a balloon.
PET is a type of polyester that is typically blow-injected into clear containers. Extrusion blow molding PET is not difficult, but it is less popular because the resin needs a lot of time to dry.
Water and soft drink bottles make up the largest segment of the PET blow molding industry. Reheating a pre-molded PET preform that is then automatically positioned into a mold is how the PET bottle blow molding process operates.
The preform is then injected with high pressure, food-grade compressed air, which causes the preform to expand and take on the form of the mold.
Plastic material feedstock is supplied through a hopper and onto a feeding transfer screw in extrusion blow molding.
This feeds material into a blow molding die that is specially made to guide the flow of the material to produce an extruded hollow tube known as a parison.
The global extrusion blow molding PET resin market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
Aspira One, a new recyclable PET polymer designed specifically for extrusion blow molding (EBM) processes and packaging applications like clear handleware and large-size bottles, has been added to Eastman Chemical Co.’s line of resins.
In comparison to other polyester resins on the market for the EBM industry, Eastman claims that the new PET polymer offers a “ideal balance of recyclability, product performance, production efficiency, and aesthetics.”
They were aware of a product line gap, “According to Eastman’s worldwide market development manager for speciality plastic packaging, PlasticsToday.
They had the chance to complete our product line and present extrusion blow molders with a fresh perspective on container resins.”