Comparison Guide: What is the difference between PETG and PET?
PETG and PET are two different types of plastic materials with distinct properties and applications. Here are the key differences between PETG (Polyethylene Terephthalate Glycol) and PET (Polyethylene Terephthalate):
- Chemical Composition:
PETG (Polyethylene Terephthalate Glycol): PETG is a modified version of PET, where a small amount of glycol is added to the polymer chain during the manufacturing process. This modification enhances the material's properties, making it more suitable for certain applications.
PET (Polyethylene Terephthalate): PET is a polymer made from ethylene glycol and terephthalic acid. It is a thermoplastic material commonly used in the production of food containers, and various other packaging applications. - Transparency:
PETG is transparent, and it offers excellent optical clarity similar to PET. This property makes PETG suitable for applications that require see-through or clear materials.
PET is also transparent, making it an excellent choice for packaging applications where product visibility is essential. - Impact Resistance:
PETG is known for its higher impact resistance compared to standard PET. It can withstand significant impacts without cracking or breaking, making it suitable for applications where durability is essential.
PET is tough with high impact strength also at temperatures down to -20°C. - Processing:
PETG is suitable for printing and is easily fabricated through thermoforming, vacuum forming, line bending, bonding or welding techniques due to its high impact resistance.
PET is also commonly used in thermoforming processes and like PETG is also printable. - Applications:
PETG is used in applications where impact resistance and optical clarity are important, such as clear display cases, signage, retail displays, and medical equipment components.
PET is primarily used for food packaging applications but the thicker gauges are also suitable for printing, signage and retail displays. - Recycling:
PETG is recyclable and falls into resin identification code 07 (mixed/other recycling).
PET is one of the most widely recycled plastics globally and can be reused for various applications.
PETG and PET are both versatile plastics with unique properties and applications. PETG is ideal for applications that require higher impact resistance, optical clarity, chemical resistance and it is also flame retardant rated B-s1, d0 according to EN 13501-1 (difficult-to-ignite). The thinner grade PET is tough with high impact strength even at temperatures down to -20°C and offers very high chemical resistance against cleaning agents, mineral oils, solvents. It is also 100% recyclable within its own waste category 1 (PET).
For more information on PETG or PET, please get in touch on 01727 863138 or email sales@stephen-webster.co.uk.
