Borouge MB7581: Bimodal PE-MD Resin for High-Performance Pipe Extrusion
Borouge MB7581 is a premium bimodal Medium Density Polyethylene (MDPE) resin, expertly manufactured by Borouge, specifically engineered for the high-performance extrusion of pipes. This low-flow grade is designed to provide an exceptional combination of long-term hydrostatic strength, superior toughness, and outstanding environmental stress crack resistance (ESCR), making it the ideal choice for durable pressure and non-pressure pipe systems.
The bimodal molecular weight distribution of Borouge MB7581 ensures an optimal balance of properties, allowing for stable and consistent extrusion while delivering finished pipes with a long service life and high reliability, even in demanding applications.
Key Features & Benefits
- Superior Environmental Stress Crack Resistance (ESCR): The bimodal structure provides excellent resistance to slow crack growth, a critical property for the long-term integrity of pressure pipes exposed to stress and various chemicals.
- Excellent Long-Term Hydrostatic Strength: Maintains exceptional mechanical integrity under continuous internal pressure, ensuring the reliability and safety of pipe systems over decades.
- Good Toughness & Impact Resistance: Provides durability during installation, handling, and service, particularly in cold environments where pipes may be subjected to impact.
- Consistent Processability: Optimized for stable and efficient pipe extrusion, allowing for high-quality production with a smooth, consistent melt flow.
- Corrosion Resistance: Inherently resistant to chemical corrosion, making it suitable for transporting a wide range of fluids, including potable water and natural gas.
- Lightweight & Easy Installation: Compared to traditional metal pipes, PE pipes are lighter and easier to transport, handle, and install, reducing overall project costs.
Typical Applications
Borouge MB7581 is highly recommended for extrusion processes focused on producing pipes for various infrastructure and industrial sectors:
- Pressure Pipes: For municipal water distribution, natural gas networks, and industrial liquid transport.
- Non-Pressure Pipes: For sewerage, drainage, and other fluid conveyance systems where pressure is not a primary concern.
- Pipe Fittings: Can be used to manufacture durable injection molded fittings for joining pipe sections.
- Industrial Pipes: For chemical transport and other industrial fluid handling systems.
Typical Properties (Representative Values)
Please note that specific values may vary slightly depending on the exact production batch and testing conditions. Always refer to the official Technical Data Sheet (TDS) from Borouge for the most accurate and up-to-date information for this specific grade.
- Melt Flow Rate (MFR) (190°C / 5 kg): ~0.7 – 0.9 g/10 min (ISO 1133)
- Density: ~0.941 – 0.943 g/cm³ (ISO 1183)
- Tensile Strength @ Yield: ~25 MPa (ISO 527-1, 2)
- Elongation at Break: >700 % (ISO 527-1, 2)
- Charpy Impact Strength (Notched, 23°C): >10 kJ/m² (ISO 179/1eA)
- Minimum Required Strength (MRS): Typically certified as PE80, indicating a minimum required strength of 8.0 MPa.
- Environmental Stress Crack Resistance (ESCR) (F50, 4 MPa, 80°C): >200 hours (ASTM D1693, Condition B)
Processing Guidelines (General Pipe Extrusion)
- Drying: Generally not required for polyethylene. Proper storage is recommended to prevent moisture absorption.
- Melt Temperature: 190 – 220 °C (optimize based on equipment type, die design, and desired pipe dimensions).
- Die Design: Requires a screw and die system optimized for low-flow PE extrusion.
- Cooling: Controlled cooling is essential to achieve the desired crystallinity and physical properties in the finished pipe.
Packaging & Storage
Borouge MB7581 is typically supplied in 25 kg bags or bulk containers. For optimal product quality and to prevent contamination, store in a dry, cool, and well-ventilated area, away from direct sunlight and heat sources. Keep packaging sealed until ready for use.
For detailed technical specifications, safety data sheets (SDS), and specific application support for Borouge MB7581, please contact your Borouge representative or your local authorized distributor. In Colombo, Western Province, Sri Lanka, you can reach out to your Ravago Lanka (Pvt) Ltd representative for expert assistance.
Hot Line : +94 77 6274625 /+94 714816833 / +94 705816883/+94 71 3090813
