OPaL HDPE Opalene B55H03
OPaL HDPE Opalene B55H03 (also searched as Opalene B55H03 / HDPE B55H03 / OPAL HD B55H03) is a high density polyethylene (HDPE) polyolefin blow-moulding grade from ONGC Petro additions Limited (OPaL). OPaL documents this grade as a natural-colored HDPE produced using Mitsui CX slurry polymerization technology.
B55H03 is positioned for high impact strength, rigidity, low parison sag, and good ESCR (environmental stress crack resistance)—a performance set that matters most when you’re blow moulding large hollow parts where wall distribution, sag control, and long-term durability can make or break production yield.
This grade is intended for large rigid containers (up to 100 L) used for chemicals, detergent, and lube oil, and for blow-moulded water tanks (up to 1000 L). If your application involves bigger articles, heavier handling, and longer service life, B55H03 is typically evaluated as a purpose-built large-part blow-moulding material rather than a general packaging HDPE.
Manufacturer: ONGC Petro additions Limited (OPaL) (India)
Technical insights
OPaL HDPE Opalene B55H03 combines a very low melt flow at 5 kg load with strong impact and ESCR values—useful indicators for large blow-moulded parts that need melt strength, toughness, and crack resistance.
- MFI 0.35 g/10 min (190°C/5.00 kg, ASTM D1238): A low MFI at this load generally signals higher molecular weight and melt strength, supporting parison stability and helping reduce sag in large-part blow moulding.
- MFI 9.00 g/10 min (190°C/21.6 kg, ASTM D1238): The higher-load flow figure helps processors understand shear-thinning behavior and how the melt may respond under higher stress during processing.
- Density 0.955 g/cm³ (23°C, ASTM D1505): Indicates an HDPE designed for rigidity and shape retention, important for large containers and tanks.
- Tensile Strength 28 MPa at yield / 40 MPa at break (ASTM D638): Supports structural integrity for large-volume containers that face stacking, handling, and transport loads.
- Elongation at Break >600% (ASTM D638): Suggests strong ductility and toughness before failure—useful for impact and abuse resistance.
- Notched Izod Impact 500 J/m (23°C, ASTM D256A): A strong indicator for impact performance in large articles where drops and handling shocks are common.
- Flexural Modulus 1000 MPa (ASTM D790A) & Hardness 64 Shore D (ASTM D2240): Reinforces the grade’s rigidity positioning for bigger blow-moulded parts.
- ESCR >600 hours (ASTM D1693B, F50, 10% Igepal): A key evaluation metric for chemical/detergent containers where stress cracking is a real-world failure mode.
- Vicat 129°C (ASTM D1525) & HDT 80°C (ASTM D648): Helpful for assessing shape retention at elevated temperatures encountered in storage, transport, and outdoor use (application-dependent).
Processing guidance: 180–220°C (recommended). Storage guidance: protect from direct sunlight/heat, store dry and dust-free, and keep storage temperature below 50°C.
Applications
Large chemical, detergent, and lube oil containers (up to 100 L): Opalene B55H03 is designed for large blow-moulded containers where impact strength, rigidity, and ESCR influence field performance. These packs often face rough handling and long-term liquid contact, so toughness and crack resistance become primary selection criteria.
Blow-moulded water tanks (up to 1000 L): For large water tanks, processors typically prioritize parison stability (to control wall distribution), stiffness (to hold shape), and durability over time. OPaL positions B55H03 with low parison sag and high impact strength, aligning with the needs of large hollow articles.
Comparable alternatives
For SEO and buyer clarity, it’s safest to describe alternatives as comparable OPaL HDPE blow-moulding grades rather than claiming direct substitutes, because each grade differs in density, flow behavior, and intended container size.
- Opalene B5004: Documented for smaller bottles/containers and positioned strongly on ESCR and appearance. It may be “comparable” by process family (HDPE blow moulding), but it targets different container sizes and performance priorities.
- Opalene B6106: Documented for rigid blow-moulded packaging and mid-size containers; its typical density/rigidity profile and application positioning differ from B55H03.
How to choose: if your part is large (100 L to 1000 L) and you need sag control + impact + ESCR, B55H03 is positioned for that envelope. If your part is smaller and appearance-led (personal care) or general rigid packaging, other OPaL blow grades may be a better fit—confirm by matching manufacturer TDS values to your design and running trials.
Common search variants
Also searched as: Opalene B55H03, Opalene HD B55H03, HDPE B55H03, Opal B55H03, B 55H03, B55H03 MFI 0.35, water tank HDPE grade, HDPE dana / granules.
Key Features
Specifications
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FAQs
Frequently Asked Questions
What is Opalene B55H03 used for?
Why is “low parison sag” important for large blow moulding?
Is HDPE B55H03 suitable for chemical or detergent containers?
What does ESCR mean in simple terms?
What processing temperature is recommended for Opalene B55H03?
Can B55H03 be used for water tanks?
Is B55H03 interchangeable with Opalene B5004 or B6106?
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