HMEL PP Polysure M20CR

Polysure M20CR is a clarified, controlled rheology polypropylene homopolymer manufactured by HPCL-Mittal Energy Ltd (HMEL) via advanced Spheripol-II technology. Specially designed for medical syringes, high clarity consumer packaging, and multicavity thin wall injection molding, M20CR delivers superior transparency, fast cycle times, and excellent dimensional stability. Produced at HMEL’s Bathinda Spheripol-II unit-I, M20CR features nucleating agents for crystal clarity and CR design for low warpage. Fully IS 10910, IS 16738:2018, and FDA 21 CFR 177.1520 compliant, M20CR is gamma sterilization compatible, making it the grade of choice for medical device and pharma packaging manufacturers in Delhi NCR and beyond.

Deep Technical Insights & Specifications

• Melt Flow Index (ASTM D1238, 230°C/2.16 kg): 20 g/10 min, enabling excellent flow characteristics for thin-wall injection molding and faster production cycles.
• Tensile Strength at Yield (ASTM D638): 34 MPa, providing reliable mechanical strength for molded industrial and consumer components.
• Tensile Elongation at Yield (ASTM D638): 12%, offering a balanced combination of rigidity and controlled flexibility during processing and use.
• Flexural Modulus – 1% Secant (ASTM D790A): 1600 MPa, indicating high stiffness and strong dimensional stability in thin-wall and precision molded parts.
• Notched Izod Impact Strength at 23°C (ASTM D256A): 35 J/m, delivering good resistance to sudden impact under standard conditions.
• Vicat Softening Temperature (ASTM D1525, 10N): 151°C, demonstrating reliable thermal resistance during high-temperature processing and application environments.
• Heat Deflection Temperature (ASTM D648, 0.455 MPa): 110°C, allowing the material to maintain structural integrity under elevated thermal loads.

Processing Guidelines (Thin Wall/Medical)

Barrel: 180–250°C (progressive)
Mold: 30–40°C
Injection Speed: High
Back Pressure: 10–20 bar
Cooling Time: 8–15 seconds (fast cycle)

Regulatory Compliance

IS 10910, IS 16738:2018, FDA 21 CFR 177.1520, gamma sterilization compatible

Technical Strength

M20CR’s Spheripol-II CR formulation delivers superior clarity, rapid crystallization, and low warpage. With a 1600 MPa flexural modulus, 110°C HDT, and nucleated structure, it enables multicavity high-speed molding with outstanding clarity and dimensional stability. Gamma compatibility ensures no yellowing or brittleness post-sterilization, meeting stringent medical and pharma standards.

Applications & Industry Use Cases

Medical Syringe Manufacturing

M20CR is the preferred choice for 1–20ml disposable syringes, providing superior clarity for dosage visibility and stability under gamma sterilization (25–50 kGy). Its fast cooling and high stiffness support multicavity (64–128) high-speed syringe production, with drop resistance and consistent plunger fit.

Pharmaceutical & Laboratory Packaging

Used in medicine bottles (ISBM), tablet blister trays, petri dishes, and diagnostic cassettes, M20CR delivers low extractables, high clarity, and dimensional precision. IS 10910 and FDA compliance make it ideal for sensitive pharma and lab consumables.

High Clarity Consumer Products

M20CR’s nucleated structure provides crystal clarity for cosmetic jars, serum droppers, and transparent yogurt/dessert cups. The 151°C Vicat softening point and 110°C HDT enable hot-fill packaging and microwaveable trays.

Multicavity Thin Wall Packaging

Yogurt pots, pharma trays, and food service containers benefit from M20CR’s 20 MFI fast fill and low cycle times (8–12 sec), supporting high-volume, high-precision production with minimal warpage and excellent mold release.

Alternatives & Comparative Overview

Several polypropylene grades provide comparable performance to M20CR, particularly for thin-wall injection molding and clarity-focused applications such as medical and packaging components.

• M20CR1 – MFI 20, produced using Spheripol-II Controlled Rheology (CR) technology with superior clarity and a flexural modulus of ~1600 MPa. Used in syringes and clarity-based thin-wall injection molding (TWIM). It is considered an identical twin grade with nearly the same specifications and performance as M20CR.
• M50NR – MFI 50, manufactured using Spheripol-II technology, offering good clarity and a flexural modulus of ~1500 MPa. Suitable for TWIM and compounding applications. Compared to M20CR, it provides higher flow for faster processing but slightly lower clarity.
• M18NH – MFI 18, produced using Spheripol-II technology, with medium clarity and a flexural modulus around ~1550 MPa. Applied in thin-wall containers. It offers lower melt flow and reduced clarity compared to M20CR.
• P20R – MFI 20, manufactured with IOCL Spheripol-II technology, delivering good clarity and a flexural modulus near ~1550 MPa. Used in medical and clarity-focused applications. As a reactor-based grade, it typically provides slightly less clarity than CR-modified grades like M20CR.
• RH20 – MFI 20, produced using OPaL Ineos gas-phase technology, with medium clarity and a flexural modulus of ~1550 MPa. Suitable for medical containers and packaging. Its gas-phase polymerization leads to lower clarity compared to CR-based grades.

These alternatives allow processors to select materials based on clarity requirements, melt flow performance, processing technology, and application needs, helping optimize production efficiency and product quality.

M20CR Competitive Advantages

M20CR’s clarified, controlled rheology design delivers best-in-class clarity, low cycle time, and gamma sterilization stability. Compared to reactor and gas-phase alternatives, M20CR offers superior transparency, lower extractables, and medical-grade dimensional stability. For maximum speed, M50NR is available (less clarity); for thin wall balance, M18NH is an option.

Please note: M20CR has been superseded by M20CR1 – superior alternative with improved performance metrics and cost efficiency. Explore full specifications, applications, and advantages to see how it delivers better value for your manufacturing needs.