1. **Polyethylene Terephthalate (PET or PETE):** Commonly used for bottles and containers for water, soft drinks, and condiments. It is lightweight, strong, and provides a good barrier to moisture and gases.
2. **High-Density Polyethylene (HDPE):** Used for milk jugs, juice bottles, and yogurt containers. It is known for its strength, durability, and resistance to moisture.
3. **Polyvinyl Chloride (PVC):** Occasionally used for food wraps and bottles. It is flexible and provides a good barrier to oxygen, but its use in food packaging is limited due to health concerns.
4. **Low-Density Polyethylene (LDPE):** Used for bread bags, frozen food bags, and squeezable bottles. It is flexible, tough, and resistant to moisture.
5. **Polypropylene (PP):** Commonly used for yogurt containers, straws, and microwaveable meal trays. It is heat resistant, making it suitable for hot-fill liquids and microwave use.
6. **Polystyrene (PS):** Used for disposable cutlery, plates, and cups. It is lightweight and provides good insulation but is not typically recommended for hot foods due to potential leaching of chemicals.
7. **Polycarbonate (PC) and Other Plastics:** Sometimes used for reusable water bottles and food storage containers. Polycarbonate is strong and durable but can release bisphenol A (BPA), a chemical of concern, especially when heated.
8. **Bioplastics and Compostable Plastics:** Made from renewable resources like corn starch, these are increasingly used for food containers as an eco-friendly alternative. They are designed to break down more easily than traditional plastics.
Each type of plastic has specific properties that make it suitable for different food packaging applications, balancing factors like safety, durability, and environmental impact.