Possible Clues:

• Plastic substance used in telephony?
• College formerly and subsequently needing energy for material
• Packaging material openly moulded around article
• Cut back the old, accepting the new packaging material
• They open parcel finally -- awkward wrapping?
• Openly upset about article offering invented material
• Lightweight thermoplastic
• Synthetic resin
• Lightweight thermoplastic, used in packaging
• A light plastic material used for wrapping