Why is PP better than PVC?

Why is PP better than PVC?

Polypropylene (PP) and polyvinyl chloride (PVC) are both popular materials used in various industries. However, PP offers several advantages over PVC, making it a preferred choice in certain applications.

Chemical Resistance: PP exhibits excellent chemical resistance compared to PVC. It is resistant to a wide range of chemicals, including acids, alkalis, and solvents. This makes PP suitable for applications where contact with corrosive substances is expected, such as chemical storage tanks, pipes, and laboratory equipment.

Temperature Resistance: PP has a higher melting point and better heat resistance compared to PVC. It can withstand higher temperatures without deforming or losing its physical properties. PVC, on the other hand, has a lower melting point and can release toxic fumes when exposed to high temperatures. This makes PP more suitable for applications that involve heat, such as manufacturing processes and automotive components.

Impact Resistance: PP has superior impact resistance compared to PVC. It is more durable and less prone to cracking or breaking under mechanical stress. This property makes PP suitable for applications that require high impact resistance, such as packaging materials, containers, and automotive parts.

Environmental Friendliness: PP is considered more environmentally friendly than PVC. PP can be recycled and has a lower environmental impact during production compared to PVC, which requires the use of additives and stabilizers that may be harmful to the environment. Additionally, when PVC is incinerated, it releases toxic chlorine-based gases, while PP incineration is less hazardous.

Flexibility and Weldability: PVC is known for its flexibility, while PP is more rigid. However, PP can be welded using various methods, such as hot gas welding and ultrasonic welding, allowing for seamless jointing of PP components. PVC, on the other hand, requires adhesive or solvent welding, which may not provide the same strength as welded PP joints.

In summary, PP offers advantages over PVC in terms of chemical resistance, temperature resistance, impact resistance, environmental friendliness, and weldability. These factors make PP a better choice in applications where these properties are critical.