Black polypropylene (PP) sheets have several advantages when used to make food boxes:

1. Food Safety:
- Approved by food safety regulations in many countries
- Non-toxic and safe for food contact
- Resistant to chemicals found in most foods

2. Durability:
- High strength-to-weight ratio
- Impact resistant
- Flexible without becoming brittle

3. Heat Resistance:
- Can withstand hot food items
- Microwave-safe in some applications

4. Moisture Barrier:
- Excellent water vapor barrier properties
- Prevents moisture from entering or escaping the container

5. Odor Barrier:
- Blocks odors, keeping food smelling fresh

6. Lightweight:
- Easy to handle and transport
- Reduces shipping costs

7. Cost-effective:
- Inexpensive compared to other food-safe materials
- Long-lasting, reducing replacement costs

8. Recyclable:
- Can be recycled at the end of its life
- Supports sustainability initiatives

9. Versatile Design Options:
- Can be thermoformed into various shapes
- Allows for transparent windows or opaque designs

10. Chemical Resistance:
- Resistant to acids, bases, and many food-related chemicals

11. Easy to Clean:
- Can be washed and reused multiple times

12. UV Resistance:
- Some grades offer protection against UV light degradation