What is the Difference Between PET and PP Plastic？
2024-07-15
Share
The main difference between PET and PP plastic is that PET is formed through the polymerization of terephthalic acid and ethylene glycol, while PP is produced by the polymerization of propylene. Polyethylene terephthalate (PET) and polypropylene (PP) are two types of plastic polymers with distinct characteristics. Understanding the differences between PET and PP is crucial for selecting the most suitable material for specific applications.
They are known for their durability and resistance to moisture, chemicals, and impact.
Difference Between PET and PP Plastic
Definition
PET (Polyethylene Terephthalate) is a thermoplastic polymer made from repeating units of ethylene terephthalate, while PP (Polypropylene) is another thermoplastic polymer, but it is derived from propylene.
Formation
PET is formed through the polymerization of terephthalic acid and ethylene glycol, while PP is produced by the polymerization of propylene.
Transparency
PP is generally less transparent than PET.
Versatility
PET is considered more versatile and adaptable than PP, especially when working with intricate designs.
Temperature Resistance
PET can withstand fill temperatures up to 160 degrees Fahrenheit, while PP can handle temperatures up to 176 degrees Fahrenheit.
Impact Resistance
Moreover, PET plastic exhibits higher durability and impact resistance compared to PP.
FAQ: PET and PP Plastic
Why is PET better than PP?
In terms of impact resistance, PET plastic cups are slightly better than PP containers.
Is PP more expensive than PET?
Yes, PP is more expensive than PET.
What is the difference between PP and PET labels?
PP labels tend to crease and stretch slightly, in comparison to PET labels.
Conclusion
PET and PP are two types of plastic polymers with distinct features. The main difference between PET and PP plastic is that PET is formed through the polymerization of terephthalic acid and ethylene glycol, while PP is produced by the polymerization of propylene.
