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A finished PET drink bottle compared to the preform from which it is made. There are two basic molding methods for PET bottles, one-step and two-step. In two-step molding, two separate machines are used. The first machine injection molds the preform, which resembles a test tube, with the bottle-cap threads already molded into place.
The blow molding process. Blow molding (or moulding) is a manufacturing process for forming hollow plastic parts. It is also used for forming glass bottles or other hollow shapes. In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and injection stretch blow molding.
This ranges from bottle design and production, including mould making, to fully automatic packaging machines. ALPLA was a pioneer in the switch from PVC to PET in the form of the first two-stage PET bottle. The company is also involved in the research, development and production of alternative, bio-based and biodegradable packaging materials.
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This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Manufacturing processes This section does not cite any sources.
It specialises in manufacturing blow-moulding for production of PET bottles, plus fillers, labellers, pasteurisers, bottle and crate washer, packers, craters, and palletizers machines. The company has 50 offices and 5,487 employees, nine research centres and over 40,000 machines installed in more than 190 countries (2018).
Manufacture of PET-pellets or flakes for bottles (bottle to bottle) and A-PET [ edit ] This process is, in principle, similar to the one described above; however, the pellets produced are directly (continuously or discontinuously) crystallized and then subjected to a solid-state polycondensation (SSP) in a tumbling drier or a vertical tube reactor.
A process flow diagram (PFD) is a diagram commonly used in chemical and process engineering to indicate the general flow of plant processes and equipment. The PFD displays the relationship between major equipment of a plant facility and does not show minor details such as piping details and designations.