The difference between PETG and PET
For a long time, the most common question that customers ask us is what is the difference between PETG and PET. Today I will use this blog to briefly explain the difference between them.
PET is polyethylene terephthalate; PETG is polyethylene terephthalate-1,4-cyclohexanedimethanol. Compared with PET, it has more 1,4-cyclohexanedimethanol comonomer, and more ethylene glycol comonomer than PCT. Therefore, the performance of PETG is very different from that of PET and PCT. PETG sheet has outstanding toughness and high impact strength, its impact strength is 3~10 times that of modified polyacrylate, and has a wide processing range, high mechanical strength and excellent flexibility, compared to PVC transparency High, glossy, easy to print. Compared with PET, the biggest feature of PETG is that PETG conforms to the concept of environmental protection and food FDA certification.
PETG is used in all kinds of long-lasting daily necessities, such as cosmetic bottles, perfume bottles, pharmaceutical packaging containers and so on. PET is mainly used in the packaging of various beverage containers, such as mineral water bottles and Coke bottles.
Advantages of PETG
1. Outstanding thermoforming properties
PETG sheets are easy to produce products with complex shapes and large stretch ratios. Also, unlike PC board and impact-modified acrylic, this sheet does not require pre-drying prior to thermoforming. Compared with PC board or acrylic, its molding cycle is short, the temperature is low, and the yield is higher.
Extruded sheets of PETG sheet are typically 15 to 20 times tougher than general-purpose acrylic and 5 to 10 times tougher than impact-modified acrylic. PETG sheet has sufficient bearing capacity during processing, transportation and use to help prevent cracking.
3. Weather resistance
PETG sheet provides excellent weather resistance. It keeps the product tough and prevents yellowing. It contains UV absorbers that can be co-extruded into a protective layer that protects the sheet from the harmful effects of UV rays.
4. Easy to process
PETG sheets can be sawed, die-cut, drilled, punched, sheared, riveted, edge-milled and cold-formed without breaking. Minor scratches on the surface can be removed with a heat gun. Solvent bonding is also routine. It is easier to process than general-purpose acrylic, impact-modified acrylic or PC board, and can be processed by flocking, electroplating, static electricity, etc.
5. Excellent chemical resistance
PETG sheets are resistant to many chemicals and common cleaning agents.
6. Environmentally friendly
PETG sheet substrates are all environmentally friendly materials and meet the requirements of food contact management.
PETG board is cheaper than PC board when its efficacy is similar to PC board, and it is more durable than acrylic.