EPDM is extremely well-established in the manufacturing field as a polymer formed by the copolymerization reaction of ethylene and propylene. Since commercial production began in 1963, up to 800,000 tons have been consumed worldwide each year.
This article is a complete guide for manufacturers of EPDM.
EPDM Material Properties
Short for ethylene propylene diene monomer, EPDM is a synthetic rubber made from ethylene, propylene, and non-conjugated diolefins through the copolymerization reaction, with excellent resistance to aging, ozone, heat, chemical corrosion, and other characteristics.
Properties of EPDM Rubber
| Appearance |
|
| Chemical Structure |
|
| Density(raw rubber) | 0.85 – 0.89 g/cm³ |
| Density(kneaded rubber) | 1.1 – 1.6 g/cm³ |
| Temperature Resistance |
|
| Glass Transition Temperature | -60°C to -40°C |
| Thermal Stability | Low physical property changes at 180°C |
| Thermal Diffusivity |
Typically between 0.1 – 0.2 mm²/s |
| Specific Heat Capacity |
0.9 – 1.2 J/g-K |
| Electricity Resistivity | Up to 10^16 Ω-cm |
| Dielectric Constant |
2.27/kHz |
| breakdown voltage |
30-40 MV/m (reliable in high voltage environments) |
| Aging Resistance |
Good resistance to ozone, UV, and weather changes |
| Chemical Resistance |
|
| Commonly Used Processing Methods |
|
| Tensile Strength |
1000 psi (6.9 MPa) |
| Elastic Properties |
The recovery rate is typically 300% |
| Hardness | 40-90 Shore A |
| Stiffness | Typically 2000 – 3000 MPa·cm³/g |
| Mechanical Properties |
|
| Shock Absorption Properties |
|
| Adhesion |
|
| Recycling Methods |
|
| Biodegradability |
Difficult to degrade in the natural environment |
Pros and Cons of EPDM
Pros
- Weather Resistance: The ability to withstand extreme temperatures and UV radiation contributes to its long lifespan.
- Low maintenance requirement: It requires minimal upkeep over time, which also benefits its cost-effectiveness.
- Ease of installation: The installation method is relatively straightforward. EPDM can be installed either fully adhered, mechanically attached, or ballasted systems.
Cons
- Susceptibility to punctures: Particularly in areas with frequent foot traffic or sharp objects. This can lead to costly repairs if not monitored closely.
- Cost of installation: The initial investment can be significant compared to other materials like asphalt shingles.
- Low Substitutability: If damaged, finding matching patches or materials can be difficult, leading to aesthetic inconsistencies.
Applications apart from the EPDM roofing system
In the construction and Industrial Sectors
As a roofing material, EPDM membranes are ideal material for flat roofs.
These membranes are lightweight, easy to install, and withstand harsh environmental conditions, providing long-lasting protection against leaks and moisture infiltration.
In Water Treatment
It is increasingly used in these facilities due to its chemical resistance and non-toxic properties.
It is effective in sealing and protecting various components within treatment systems, ensuring that water remains uncontaminated during processing.
In Sealing Material
It provides reliable seals for joints and connections in industrial settings.
Its flexibility and resilience make it an excellent choice for both new installations and repairs, enhancing the longevity and efficiency of numerous systems.
EPDM vs Neoprene
EPDM and Neoprene(Polychloroprene) are two popular synthetic rubber materials, each with distinct properties and applications.
| EPDM | Neoprene | |
| Application |
|
|
| Resistance |
Good weather resistance(extreme temperatures, UV radiation, and ozone exposure) |
Good oil, chemical, and heat resistance |
| In Outdoor Application | Well-suited | It works, but not that suitable |
| When Exposure to Oils and Solvents | Relatively worse | Better |
EPDM vs Viton
When comparing EPDM and Viton(also called FKM, which means Fluoroelastomer), it’s essential to understand their distinct properties and applications.
| EPDM | Viton | |
| Application |
|
|
| Resistance | Excellent weather resistance |
superior chemical resistance, particularly against oils, fuels, and solvents |
| Cost-Effectiveness | More affordable | More expensive |
| Use Difficulty | Ease of use | Harder |
| Temperature Resistance | Better in low temperature | Maintain performance in high-temperature |
EPDM vs Buna
EPDM and Buna-N (a brand name for a type of synthetic rubber, referring to nitrile rubber, short for NBR) are two widely used elastomers with distinct properties and applications.
| EPDM | Buna | |
| Application |
|
|
| Better Resistant in |
|
|
| Suitable Temperature Range | Broader | More narrow |
| Use in Oil | Not suitable | Maintains its integrity in the presence of petroleum-based products |
EPDM vs Silicone
EPDM and Silicone are two popular materials used in various applications, particularly in sealing and insulation.
While both serve similar purposes, they have distinct characteristics that make them suitable for different environments.
| EPDM | Silicone | |
| Application |
|
|
| Temperature flexibility | Wider temperatures range from extremely cold to hot. | Exhibits superior thermal stability and can withstand higher temperatures |
| More Resistant to |
|
|
| Cost-Effectiveness | More affordable | More expensive |
| Longevity | Shorter life span | Longer-lasting performance |
EPDM vs PTFE
EPDM and PTFE (Polytetrafluoroethylene) are two distinct synthetic materials, each with unique properties and applications.
| EPDM | PTFE | |
| Application |
|
|
| Thermal Stability | More versatile | Better in higher temperature |
| Elasticity | Better | Worse |
| Durability | Better | Worse |
| Chemical Inertness | Worse | Better |
| Friction | Worse | Better(non-stick properties) |
Contact XMAKE for EPDM Products
As the world’s leading digital manufacturing platform, EPDM is manufactured by XMAKE as a material ideal for use in 3D printing, CNC machining, and injection molding.
We can also source other types of rubber on request, but quotes take up to 48 hours. Click here for an instant quote.
FAQ
Q1: What are the advantages of using EPDM rubber in roofing systems?
A: It offers several advantages for roofing systems, including its durability, weather resistance, and elasticity. It is ideal for low-slope applications and can withstand extreme temperatures, making it a reliable choice for both commercial and residential roofing.
Q2: How thick is a typical EPDM rubber roofing membrane?
A: The membrane thickness typically ranges from 45 mils to 90 mils, with 60 mils being a common choice for many applications. The thickness chosen can affect the membrane’s durability and performance.
Q3: Can EPDM be used for both residential and commercial roofing systems?
A: Yes, it is commonly used in both residential and commercial roofing systems. Its versatility and durability make it suitable for a variety of roofing needs, including low-slope roofs.
Q4: Are there different types of EPDM available for roofing?
A: Yes, it is available in different colors, primarily black and white. Black is more common, while white is often used for its reflective properties, which can help reduce energy costs.
Q5: What makes EPDM rubber roofing an ideal choice for low-slope roofs?
A: EPDM’s flexibility and ability to form seamless membranes make it ideal for low-slope roofs. Its durable synthetic rubber roofing membrane can effectively resist water ponding, which is a common issue in low-slope applications.
Reference
- Performance and advantages of EPDM rubber-Industry News-Carbon Black Industry Net. (n.d.). https://www.tanhei.com/news/knowledge/202107/1073.html
- What is ethylene propylene diene (EPDM) rubber made of, its properties, and applications? (n.d.). http://www.zjtpe.com/articleinfo/404.html
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LegenDay. (2024, June 13). EPDM Rubber: Discover its Properties, Grades, Benefits, Limitations, & Applications. LegendDay Silicone Product Manufacturer. https://legenday.com.cn/epdm-rubber/
