Freeze-proof PET (Polyethylene Terephthalate) rigid film is a specialized type of plastic film designed to maintain its integrity and performance under low-temperature conditions. This type of film is commonly used in packaging applications where the contents may be exposed to freezing temperatures, such as in the food and beverage industry.

Features of Freeze-Proof PET Rigid Film:
1. Temperature Resistance:
    Low-Temperature Flexibility: The film remains flexible and does not become brittle even at very low temperatures, typically down to -40°C or lower.
    High-Temperature Stability: It can also withstand high temperatures, making it suitable for a wide range of thermal processing and storage conditions.

2. Mechanical Strength:
- Tensile Strength: High tensile strength ensures that the film can withstand the stresses of handling, transportation, and storage without tearing or breaking.
- Impact Resistance: Good impact resistance helps protect the packaged products from damage during shipping and handling.

3. Barrier Properties:
- Moisture Barrier: Effective at preventing moisture from entering the package, which is crucial for maintaining the quality of frozen foods.
- Oxygen Barrier: Reduces the permeability of oxygen, helping to extend the shelf life of the product by preventing oxidation.

4. Clarity and Printability:
- High Clarity: Provides excellent transparency, allowing the contents to be clearly visible.
- Printable Surface:Can be printed with high-quality graphics and text, enhancing the visual appeal of the packaging.

Applications:
- Frozen Foods: Packaging for frozen vegetables, fruits, meats, and ready-to-eat meals.
- Beverages: Containers for bottled water, juices, and other beverages that may be stored or transported in cold environments.
- Pharmaceuticals: Packaging for medications and medical devices that require cold storage.

Manufacturing Considerations:
- Additives and Coatings: Special additives and coatings may be applied to enhance the freeze-proof properties, such as plasticizers to improve flexibility at low temperatures.