Reliance PPCP Repol B250EG

Reliance Repol B250EG is a specialized, high-flow polypropylene (PP) impact copolymer (PPCP) engineered using the Unipol gas-phase process and a high-activity stereospecific catalyst. Its standout feature is a melt flow rate of 25 g/10 min, making it ideal for high-speed extrusion coating lines where uniform coating and process reliability are critical. B250EG is recommended for extrusion coating of PP woven fabrics—think woven sacks, tarpaulins, agro-textiles, and flexible packaging—where its flow, adhesion, and toughness ensure optimal product quality. This grade is trusted by woven sack manufacturers, laminators, packaging converters, and OEMs across India.

Technical specifications of Reliance Repol B250EG

Flow and physical properties

• Melt Flow Rate (MFR): 25 g/10 min (230°C/2.16 kg) – delivers excellent flow for thin, even coatings at high line speeds
• Density: 0.90 g/cm³ – standard for PP impact copolymers, supporting lightweight coatings

Mechanical performance of coated structures

• Tensile Strength at Yield: ~24 MPa – ensures coated fabrics retain strength and flexibility
• Flexural Modulus: ~0.9 GPa – provides a balance of stiffness and drapability
• Impact Resistance: Superior to PP homopolymer coatings, reducing cracking and improving durability under handling/folding

Thermal behaviour and service conditions

• Service Temperature Range: Suitable for moderate temperatures found in outdoor sacks, tarps, and packaging—not for continuous high-heat use
• Thermal Stability: Maintains coating integrity during high-speed extrusion and typical end-use conditions

Functional Features

B250EG is purpose-built for extrusion coating, delivering process efficiency, product durability, and surface quality. The grade’s high melt flow, impact copolymer matrix, and process consistency make it a top choice for converters seeking reliability and productivity gains.

Applications and industry use cases

Coating of PP woven fabrics and sacks

B250EG is the preferred PPCP for extrusion coating of polypropylene woven sacks, FIBC fabrics, and tarpaulins. Its high flow enables thin, uniform coatings at high line speeds, improving moisture barrier, printability, and seam strength. This results in tough, reliable sacks and tarps for cement, fertiliser, and agro applications.

Tarpaulins, agro-textiles, and industrial fabrics

For tarpaulins, ground covers, and agro-textiles, B250EG delivers abrasion resistance and flexibility, helping products withstand outdoor exposure and repeated handling. Its impact copolymer base reduces cracking and improves service life.

Flexible packaging and paper-poly laminates

B250EG is widely used for extrusion-coated films, paper-poly laminates, and board coatings. The PP layer adds chemical and moisture resistance to cartons and flexible packs, with high line speed compatibility.

Other extrusion-coating and lamination applications

Beyond woven fabrics, B250EG serves in general plastics, non-woven fabric coatings, and specialty laminates where high-flow, thin, and tough coatings are required.

Processing guidelines for PPCP Repol B250EG in extrusion coating

Recommended extrusion-coating conditions

• Melt temperature: 220–260°C (adjust as per line and substrate)
• Line speed: High MFR supports faster lines and thinner coatings at stable screw loads
• Substrate prep: Ensure clean, dry woven fabric for optimal adhesion

Coating design and thickness optimisation

• Target uniform, thin coatings for cost efficiency and performance
• Monitor edge stability and neck-in—B250EG’s flow helps control neck-in for consistent coverage
• Screw design: Standard PP IC screw with proper L/D and mixing section recommended

Common coating defects and troubleshooting

• Orange peel: May result from low melt temperature or poor substrate prep—raise temp, improve cleaning
• Neck-in: Excessive line speed or insufficient die temp—adjust line and thermal settings
• Poor adhesion: Check substrate moisture and surface tension; optimise melt temp and pressure

Performance advantages vs alternative PP grades

B250EG vs PP homopolymer coating grades

B250EG offers much better impact and crack resistance, especially in thin coatings on woven fabrics. This means fewer failures during folding, stacking, and transport.

B250EG vs lower-MFI PPCP grades

Its very high MFR enables higher throughput, thinner coatings, and better coverage—translating to productivity gains and material savings on modern extrusion lines.

Why choose Repol B250EG for extrusion coating?

• Faster lines: High flow means higher speed and lower energy use per unit
• Lighter coatings: Enables downgauging without sacrificing coverage or durability
• Stronger fabrics: Impact copolymer matrix improves resistance to cracking and abrasion
• Consistent finish: Uniform coating and reduced defects for better printability and appearance