OPAL PP Opalene MH55N

OPAL PP Opalene MH55N is a polypropylene homopolymer injection moulding grade manufactured by ONGC Petro Additions Limited (OPaL) under the OPaLene PP portfolio. Produced using Ineos Gas Phase polymerization technology, this natural coloured grade is designed for converters who need very high flow, excellent stiffness, good dimensional stability, and anti-static performance in fast-cycle injection moulding environments.

MH55N is positioned as a high flow nucleated PP homopolymer for processors working with thin-wall parts, multi-cavity moulds, high-volume consumer products, housewares, and compounding applications. Its nucleated formulation supports faster crystallization and more stable part formation, while the anti-static property helps reduce dust attraction and improves handling in production and storage.

Manufacturer Snapshot

ONGC Petro Additions Limited (OPaL) is one of India’s major petrochemical manufacturers with a broad polypropylene portfolio serving injection moulding, film, raffia, and specialty industrial applications. OPaLene PP grades are widely used in the Indian plastics market for application-focused performance, dependable product consistency, and regulatory documentation that supports industrial and compliance-sensitive end uses.

Technical Insights and Data Sheet Highlights

OPAL PP Opalene MH55N has a melt flow index of 55 g/10 min, placing it in the very high-flow category for polypropylene homopolymer injection moulding grades. This makes it especially suitable for thin-wall moulding, multi-cavity tools, and applications where fast cavity filling and shorter cycle times are commercially important.

The grade has a density of 0.90 g/cm³, consistent with lightweight rigid polypropylene applications. In mechanical performance, MH55N offers 35 MPa tensile strength at yield, giving processors a reliable stiffness-oriented resin for moulded parts that need shape retention and structural stability. Its 15% elongation at break reflects a controlled balance between rigidity and practical handling toughness.

For stiffness, MH55N delivers a flexural modulus of 1600 MPa, which is a strong indicator of rigid part performance in consumer products, housewares, and packaging components. Its notched Izod impact strength of 22 J/m at 23°C supports everyday durability, while Rockwell hardness of 100 on the R scale reinforces the hard surface character expected in rigid injection moulded parts.

Thermally, MH55N provides a Vicat softening point of 150°C and a heat deflection temperature of 115°C, helping parts retain dimensional integrity under moderate heat exposure. The nucleated nature of the grade improves crystallization speed and dimensional control, while the anti-static additive supports cleaner surfaces and easier downstream handling.

Injection Moulding Performance

MH55N is engineered for processors who need a polypropylene homopolymer that can run efficiently in demanding injection moulding lines. Its very high flow helps fill thin sections quickly, supports multi-cavity productivity, and reduces processing difficulty in complex mould geometries.

The nucleated formulation is especially valuable in high-output moulding because it supports faster crystallization and more predictable part dimensions. Combined with anti-static performance, this makes MH55N a practical choice for converters focused on throughput, part consistency, and cleaner handling behavior.

Applications

Consumer Products

OPAL PP Opalene MH55N is well suited for consumer product moulding where fast processing, good stiffness, and stable part quality are required. It can be used in utility items, personal care packaging components, and other high-volume moulded products where production efficiency and rigid performance are key buying factors.

Housewares

For housewares, MH55N offers the combination of high flow, stiffness, and dimensional stability needed for repeat-volume moulding. It is suitable for moulded home-use products such as storage items, kitchen-related articles, organizers, and rigid daily-use plastic components that benefit from fast cycles and reliable shape retention.

Thin-Wall Rigid Packaging

MH55N is particularly relevant for thin-wall rigid packaging because its 55 MFI flow profile supports easy filling of thinner sections and efficient moulding in high-speed production environments. This makes it a strong candidate for rigid packaging components where lightweight design, cycle-time efficiency, and dimensional consistency are important.

Multi-Cavity Moulding

One of the strongest use cases for MH55N is multi-cavity moulding. Its very high flow and nucleated behavior help processors maintain productivity across multiple cavities, improve repeatability, and support better output in commercial moulding operations where speed and consistency directly affect profitability.

Base Resin for Compounding

MH55N also works well as a base resin for compounding applications where processors need a high-flow polypropylene homopolymer for downstream formulation. Its flow profile and stiffness characteristics make it useful for compounders targeting injection moulding applications that require easy processing and rigid end-use performance.

Comparable Alternatives

Within the OPaL injection moulding portfolio, OPAL PP Opalene MH25N is a strong alternative for processors seeking a high-flow clarified grade for transparent containers and medical syringe applications. MH55N, however, is better positioned where very high flow, nucleation, anti-static performance, and multi-cavity productivity are more important than clarity.

Compared with OPAL PP Opalene MH23, MH55N offers much higher flow and is better suited for ultra-fast filling, thin-wall packaging, and high-output moulding lines. MH23 remains a strong general-purpose high-flow grade, but MH55N is the better fit when processors need a more productivity-driven resin for demanding tooling conditions.

Against OPAL PP Opalene MH13 and MH13A, MH55N is clearly the faster-flow option. MH13 and MH13A are more aligned with stiffness-led injection moulding, with MH13A adding anti-static benefit, while MH55N is assigned to applications where very high flow, nucleation, and multi-cavity efficiency are the main selection drivers.