Specialty resins can broadly be classified into two categories - thermoplastic resins and thermosetting resins. Thermoplastic resins soften when heated and harden when cooled. They can be molded and formed repeatedly through heating and cooling cycles. Examples of commonly used thermoplastic resins include polycarbonate, polyamide, polypropylene, and polyvinyl chloride. https://www.newsanalyticspro.com/resin-development/