What type of resin can be re-formed after curing?

The correct answer is thermoplastic. Thermoplastic resins have the unique ability to be re-melted and re-formed after they have been cured. This means that they do not undergo a chemical change when they are heated, allowing them to be reshaped multiple times without losing their essential properties. This characteristic makes thermoplastics ideal for applications where flexibility and recyclability are important.

In contrast, thermosetting resins, such as those included in the thermoset category, undergo a chemical change during curing that creates a rigid structure. Once cured, they cannot be remelted or reshaped. Polyester resins typically fall into the thermoset category as well, further reinforcing that they cannot be re-formed after curing. The term "thermal" is not specific to a type of resin and does not accurately describe the behavior of resins in terms of their ability to be reshaped after curing.