The main differences between polypropylene (PP) and polyester (PET) strapping lie in their strength, elasticity, durability, and intended use cases. Here's a comparison to help you understand which is better suited for various applications:
🔹 1. Strength & Load Capacity
- Polypropylene (PP):
- Lower tensile strength.
- Suitable for light to medium-duty applications.
- Can deform under high tension.
- Polyester (PET):
- Higher tensile strength, close to that of steel strapping.
- Ideal for medium to heavy-duty loads.
- Holds tension better over time.
🔹 2. Elongation & Recovery
- PP Strapping:
- More flexible and stretches more.
- Doesn't recover tension well after stretching.
- Best for loads that don't shift much.
- PET Strapping:
- Has better recovery and tension retention.
- Ideal for loads that might settle or shrink over time.
🔹 3. Durability & Environmental Resistance
- PP Strapping:
- More sensitive to UV light and temperature changes.
- Tends to become brittle over time outdoors.
- PET Strapping:
- Better UV resistance and temperature tolerance.
- More abrasion-resistant and durable.
🔹 4. Cost
- PP:
- Cheaper, more economical for general-purpose use.
- PET:
- More expensive, but better for demanding applications.
🔹 Common Uses
- PP Strapping:
- Bundling newspapers, cartons, light pallets.
- Short-term indoor storage or shipping.
- PET Strapping:
- Securing bricks, timber, heavy pallets, and industrial loads.
- Long-term storage or outdoor shipping.
Summary Table:
|
Feature |
Polypropylene (PP) |
Polyester (PET) |
|
Strength |
Low to Medium |
High |
|
Elasticity |
High (less recovery) |
Moderate (better recovery) |
|
Tension Retention |
Poor |
Good |
|
UV Resistance |
Low |
High |
|
Cost |
Lower |
Higher |
|
Ideal Use |
Light-duty bundling |
Heavy-duty load securing |
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