PET (Polyethylene terephthalate) is a general-purpose thermoplastic in the polyester family. Clear Rigid Pet Sheet is lightweight, strong and impact-resistant. It is often used in food processing machinery due to its low moisture absorption, low thermal expansion, and chemical resistant properties.
What are advantages of PET?
- It has higher strength and stiffness than PBT
- It is very strong and lightweight & hence easy and efficient to transport
- It is known for its good gas (oxygen, carbon dioxide) and moisture barrier properties
- It exhibits excellent electrical insulating properties
- PET has broad range of use temperature, from -60 to 130°C
- As compared to PBT, it also has higher heat distortion temperature (HDT)
- It has low gas permeability, in particularly with carbon dioxide
- PET is suitable for transparent applications, when quenching during processing
- PET doesn’t not break or fracture. It is practically shatter-resistant and hence, a suitable glass-replacement in some applications
- It is recyclable and transparent to microwave radiation
- PET is approved as safe for contact with foods and beverages by the FDA, Health Canada, EFSA & other health agencies
What is the disadvantages of PET?
- Lower impact strength than PBT
- Lower moldability than PBT, due its slow crystallization rate
- Affected by boiling water
- Attacked by alkalis and strong bases
- Attacked at high temperatures (>60°C) by ketones, aromatic and chlorinated hydrocarbons and diluted acids and bases
- Poor burning behavior
What are the main applications of PET?
Polyethylene Terephthalate is used in several packaging applications as mentioned below:
- Because Polyethylene Terephthalate is an excellent water and moisture barrier material, plastic bottles made from PET are widely used for mineral water and carbonated soft drinks
- Its high mechanical strength, makes Polyethylene Terephthalate films ideal for use in tape applications
- Non-oriented PET sheet can be thermoformed to make packaging trays and blisters
- Its chemical inertness, together with other physical properties, has made it particularly suitable for food packaging applications
- Other packaging applications include rigid cosmetic jars, microwavable containers, transparent films, etc.
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