Polyethylene naphthalate (PEN) is a condensation polymer from the polyester family, chemically related to PET (polyethylene terephthalate), but offering improved properties such as higher heat resistance, better strength, and superior barrier performance. These enhanced characteristics make PEN suitable for more demanding packaging and technical applications.Polyethylene naphthalate (PEN) is a condensation polymer from the polyester family, chemically related to PET (polyethylene terephthalate), but offering improved properties such as higher heat resistance, better strength, and superior barrier performance. These enhanced characteristics make PEN suitable for more demanding packaging and technical applications.
• Food and beverage packaging: Premium bottles for carbonated drinks, beer, functional beverages, and light
• sensitive products.
• Electronics: PEN films for flexible circuits, capacitors, electromagnetic shielding, and heat
• stable electrical components.
• Photovoltaics: Substrates for thin
• film solar cells requiring UV resistance, low weight, and long life.
• Medical and pharmaceutical packaging: Wrapping films and ampoules demanding strong barrier properties and sterility.
• Optical applications: Transparent films and displays with UV durability and clarity.
• Higher heat resistance than PET: With a glass transition temperature around 120 °C, PEN withstands higher temperatures without deformation.
• Improved mechanical strength: PEN is stiffer and stronger than PET, allowing thinner, lighter parts with equal or better performance.
• Excellent barrier properties: Offers significantly lower permeability to oxygen and CO₂ than PET—extends product shelf life.
• Good dimensional stability: Greater rigidity and lower thermal expansion provide form stability under heat.
• UV resistance: Superior resistance to UV light exposure makes it suitable for outdoor or light
• sensitive applications.
• Higher cost than PET: More expensive due to complex synthesis and lower production volumes.
• Limited processing infrastructure: Requires adapted equipment and expertise.
• Not suited for high mechanical loads: Although stronger than PET, PEN does not match engineering plastics like PBT or PC.
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