PP Rod Polypropylene Round Bar

Discover the strength and versatility of DoonX’s wholesale PP rods. Available in a range of diameters to meet your project requirements. Take advantage of our volume discounts—larger orders mean lower prices.

Polypropylene (PP) is a versatile polymer widely used in a variety of applications due to its excellent balance of properties. Below is a detailed analysis of PP’s characteristics across mechanical, thermal, chemical, and electrical domains:

Mechanical Properties:

• Tensile Strength: Polypropylene typically has a tensile strength of 30 to 35 MPa, which is quite strong for a lightweight plastic. This property makes it suitable for products that require hinge or bending applications such as living hinges.
• Impact Resistance: PP has good resistance to impact, which allows it to withstand sudden forces making it ideal for containers and automotive bumpers.
• Elongation at Break: PP can elongate between 100% to 600% before breaking, indicating good ductility.
• Flexural Modulus: The flexural modulus of PP is around 1,500 MPa, signifying it has good stiffness and is able to retain its shape under stress.

Thermal Properties:

• Melting Point: PP has a relatively high melting point around 160°C to 170°C, which allows it to be used for applications that may experience higher temperatures.
• Thermal Expansion: Polypropylene has a coefficient of thermal expansion of about 100 to 150 x 10^-6 per °C, which is higher than that of many other plastics, necessitating considerations in designs where thermal variation is significant.

Chemical Properties:

• Chemical Resistance: PP is resistant to bases and acids, making it useful in containers and pipings for chemicals. However, it is susceptible to chlorinated solvents and aromatics.
• Solvent Resistance: It is less resistant to solvents like ketones and chlorinated hydrocarbons, which can lead to swelling and deformation.

Electrical Properties:

• Dielectric Constant: Typically around 2.2 to 2.6 at 1 kHz, indicating low permittivity, which makes PP a good insulator.
• Dielectric Strength: With a dielectric strength of 19-30 kV/mm, PP is used in electrical applications as an insulating material.

Additional Properties:

• Water Absorption: PP has very low water absorption, under 0.1%, making it suitable for applications where water or moisture exposure is common.
• Density: One of PP’s most significant features is its low density, around 0.855 to 0.946 g/cm³, which contributes to its lightweight nature.

 

Polypropylene (PP) rods are highly versatile and find applications across multiple sectors due to their excellent chemical resistance, mechanical properties, and durability. Here are some common uses for PP rods:

Industrial Applications

• Chemical Processing Equipment: PP rods are used in chemical tanks, valves, and pumps because of their resistance to a wide array of chemical solvents, bases, and acids. This makes them ideal for handling corrosive materials.
• Welding Rods: PP rods are often used as welding rods for plastic welding processes, especially for fabricating and repairing PP components.

Automotive Industry

• Automotive Parts: Due to their toughness and resistance to fatigue, PP rods are used in manufacturing various automotive parts, including bumpers, dashboards, and storage containers.

Building and Construction

• Water or Fluid Handling Systems: PP’s low water absorption and resistance to most forms of corrosion make it suitable for use in fluid handling systems, such as pipes and fittings, particularly for industrial wastewater systems.

Consumer Goods

• Furniture: PP rods are utilized in creating durable and lightweight furniture, often used for outdoor or garden furniture because of their resistance to moisture and chemical exposure.
• Toys: The high impact strength and safety profile of PP make it suitable for use in children’s toys, where durability and non-toxicity are essential.

Medical Devices

• Medical Equipment: PP is commonly used in non-implantable medical items, such as containers and lab equipment, due to its good chemical resistance and ability to be sterilized.

Agricultural and Horticultural Applications

• Plant Stakes and Supports: PP rods are used in agriculture for plant stakes and vine supports, benefiting from PP’s resistance to moisture and bacterial growth, ensuring longevity in outdoor conditions.