The Blowing Technique

Behind every Plastivalle bottle and canister there is a precise and reliable process: blowing.
It is thanks to this technology that plastic takes shape and becomes a durable, functional container designed to last.
The blowing process is a plastic transformation technique used to create hollow objects, such as bottles and containers. There are several variations of blowing but the most common method is that of Extrusion Blow Molding (EBM).

Process steps
Parison extrusion: Plastic (such as polyethylene or PVC) is melted and a hollow tube of molten plastic is extruded in the form of a "parison" preform.
Mold Insertion: The parison is inserted between two halves of an open mold. The mold is closed around the parison, locking it. 
Blowing: Compressed air is blown into the parison, which expands and conforms to the internal shape of the mold.
Cooling: The piece is allowed to cool inside the mold until it solidifies into the desired shape.
Opening the mold and removing the part: the mold is opened and the formed bottle is removed. 
In short, the blowing process consists of forming a tube of molten plastic, which is then expanded inside a mold using compressed air, giving shape to the object.
We process selected materials such as HDPE, LDPE, PET and PP, always choosing the best combination based on the final application.
Experience, technology and production flexibility: this is how at Plastivalle we shape our customers' ideas, every day.