Plastics have thousands of different base chemicals, derivatives and additives that are formulated to cover a wide range of functional and aesthetic properties. To simplify the process of finding the material that best fits a Pet Preform, let’s look at two broad categories of plastics: thermoplastics and thermosets.
Thermoplastics are the most common type of plastic. The main feature that makes them different from thermoset plastics is that they can undergo multiple cycles of melting and curing without significant degradation. Thermoplastics are typically provided in the form of small particles or flakes that are heated and formed into the desired shape by various manufacturing processes. This process is completely reversible because no chemical bonding occurs, which makes it possible to recover, melt and reuse thermoplastics.
Acrylic acid (polymethyl methacrylate)
Acrylonitrile butadiene styrene
Compared to thermoplastics, thermosets (also known as thermosets) remain permanently solid after curing. The polymer in the thermoset material crosslinks during curing caused by heat, light or suitable radiation. This curing process forms an irreversible chemical bond. Thermoset plastics decompose when heated, rather than melting, and do not reform upon cooling. It is impossible to recover the thermosetting material or return the material to its basic composition.
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