MDPE Rotomoulding Powder
Rototech Industries is one of the leading manufacturers, suppliers, and exporters of MDPE Rotomoulding Powder. MDPE (Medium-Density Polyethylene) is a thermoplastic polymer that bridges the performance gap between LLDPE and HDPE, offering an outstanding combination of toughness, rigidity, and environmental stress crack resistance (ESCR). Its uniquely balanced molecular structure makes it the preferred choice for rotational moulding applications that demand both strength and flexibility — from large water storage tanks and chemical containers to underground pipes, agricultural products, and industrial enclosures.
MDPE Rotomoulding Powder from Rototech is specially pulverised to an optimum particle size for smooth, uniform melting inside the mould cavity. The result is seamless, stress-free products with consistent wall thickness, excellent surface finish, and long-term durability even under demanding environmental conditions.
MDPE Rotomoulding Powder — Product Specifications
| Material Type | MDPE Rotomoulding Powder |
| Packaging Size | 20 Kg / 25 Kg Bags |
| Packaging Type | HDPE Woven Bags (moisture-proof) |
| Physical State | Fine Powder |
| Brand | Rototech |
| Colour Availability | Natural (Off-White), Black, White, Blue, Red, Yellow, Sea Green, Grey, Custom |
| Applications | Water Tanks, Chemical Storage Tanks, Underground Tanks, Septic Tanks, Agricultural Containers, Road Barriers, Livestock Feeders, Industrial Bins, Large Hollow Containers, Irrigation Tanks |
| Grade | Prime / Technical Grade |
| Usage | Industrial & Commercial Rotational Moulding |
| Density | 0.926 – 0.940 gm/cm³ |
| Melt Flow Rate (MFR) | 3 – 6 gm/10 min (190°C / 2.16 kg load) |
| Tensile Strength (Yield) | (180–210) (17.5–20.5) (2540–2970) (kg/cm²) (MPa) (Psi) |
| Tensile Strength at Break | (120–150) (11.75–14.7) (1704–2132) (kg/cm²) (MPa) (Psi) |
| Elongation at Break | ≥ 400 % |
| ESCR | Excellent (≥ 500 Hours — ASTM D1693) |
| Vicat Softening Point | 110 – 125°C |
| UV Stabilization | Available on request |
| Storage | Bags should be stored in dry / closed conditions at temperature below 50°C |
| Price | 100 Rupees to 180 Rupees Per Kilogram |
| Minimum Order Quantity | 500 Kilograms |
| Sample | Paid Sample Available |
Reliable Performance and Expected Outcomes
MDPE’s molecular architecture places it in a density range of 0.926 – 0.940 g/cm³, which is precisely the sweet spot for rotational moulding applications that require above-average rigidity without sacrificing toughness. The polymer chains in MDPE are moderately branched — more so than HDPE but less than LLDPE — resulting in a material with excellent environmental stress crack resistance (ESCR), superior to standard HDPE grades, while still maintaining the stiffness required for structural applications.
The intermediate crystallinity of MDPE allows the powder to melt uniformly and flow predictably inside the mould during the rotomoulding cycle. This uniform melt behaviour minimises pinhole formation, prevents uneven wall thickness, and ensures that large and complex mould geometries fill consistently. Products made from Rototech MDPE Rotomoulding Powder regularly demonstrate outstanding impact performance even at sub-zero temperatures — making them ideal for cold-chain storage, agricultural use in frost-prone regions, and outdoor infrastructure applications.
When paired with appropriate UV stabilisers and antioxidant packages, MDPE moulded articles retain their mechanical properties over extended service lives, with minimal colour fade or surface degradation. The combination of ESCR, toughness, and UV stability positions MDPE as the material of choice for potable water tanks, large chemical storage vessels, underground septic systems, and rural irrigation infrastructure — products that must perform reliably for 15–25 years with minimal maintenance.
Customised For Your Requirement
Diverse rotomoulding applications demand materials tailored for specific performance criteria. At Rototech, we develop custom MDPE grades by compounding select base resins with precisely measured additive packages — UV stabilisers, antioxidants, carbon black, colour masterbatches, ESCR improvers, and flame-retardant systems — all engineered to meet the exact requirements of your end product.
From fine-tuning the melt flow index to adjusting the particle size distribution for your specific mould configuration, Rototech’s technical team works alongside your engineers to develop formulations that maximise cycle efficiency and product quality. Custom compounds are available for applications ranging from food-grade water containers to heavy-duty chemical storage tanks and large-format agricultural vessels.
Packed and Ready to Go On-Demand
Our MDPE powder is filled in heavy-duty HDPE woven bags lined with an inner moisture barrier film. Each bag is sealed on automated lines that ensure accurate net weight, leak-proof closure, and excellent moisture resistance during transit and storage. Standard pack sizes of 20 kg and 25 kg are designed for ergonomic handling during loading and unloading. Batch details, product grade, manufacturing date, and storage instructions are printed on both sides of each bag — ensuring traceability regardless of stacking orientation.
For high-volume customers, jumbo bags (500 kg – 1 MT) are also available. All bags must be stored in dry, closed conditions at a temperature below 50°C to maintain powder flow characteristics and prevent caking.
Grades Detail
Grading of Rototech MDPE Powders is based on:
- Density
- Melt Flow Index (MFI)
- Impact Resistance
- Rigidity / Stiffness
- ESCR (Environmental Stress Crack Resistance)
- Grind Type & Particle Size
- Custom Compound Colours and Additive Packages
ROTOETHENE MDPE Grade — RM35I05 Technical Specifications
Parameter | Standard | UOM | Compression Moulded | Rotomoulded |
MFI | ASTM D1238 | gm/10 min | 5 | 5 |
Density | ASTM D1505 | gm/cm³ | 0.933 | 0.933 |
Recommended PIAT | In-lab Std | °C | — | 200°C |
Tensile Strength Yield | ASTM D638 | (kg/cm²) (MPa) (Psi) | (195) (19.0) (2755) | (185) (18.1) (2625) |
Tensile Strength Break | ASTM D638 | (kg/cm²) (MPa) (Psi) | — | (135) (13.2) (1915) |
IZOD Impact Strength | ASTM D256 | Kg.cm/cm | 55 (Partial Break) | — |
ARM Low Temperature | ARM Standard | (J/mm) (ft/lbs) | — | (30) (120) |
Flexural Modulus 1% | ASTM D790 | (kg/cm²) (MPa) (Psi) | (6800) (665) (96480) | (2400) (235) (34090) |
Elongation at Yield | ASTM D638 | % | 18 | 12 |
Elongation at Break | ASTM D638 | % | 920 | 400 |
ESCR | ASTM D1693 | Hrs | 500 | 500 |
Key Features of MDPE Rotomoulding Powder
Outstanding Environmental Stress Crack Resistance (ESCR)
MDPE’s moderate branching provides excellent resistance to stress cracking caused by detergents, surfactants, and chemical agents — far superior to standard HDPE. Ideal for tanks storing aqueous solutions, agricultural chemicals, and cleaning agents.
Balanced Stiffness and Impact Toughness
Unlike LLDPE’s flexibility or HDPE’s rigidity, MDPE delivers a balanced modulus that keeps large moulded containers dimensionally stable while absorbing impact loads without cracking or shattering.
Excellent Low-Temperature Impact Performance
MDPE retains high toughness and ductility at temperatures as low as −40°C, making it suitable for cold-chain containers, refrigeration housings, and outdoor applications in cold climates.
Uniform Melt and Consistent Wall Thickness
The optimised particle size distribution and controlled MFI of Rototech MDPE ensures a smooth, bubble-free melt pool during the rotomoulding cycle, delivering defect-free, uniform-wall products even in large and complex mould geometries.
Good Chemical Resistance
MDPE resists a broad range of acids, alkalis, alcohols, and organic solvents. It is particularly well-suited for storing fertilisers, pesticides, and mild industrial chemicals.
UV-Stabilised Grades Available
Rototech offers UV-stabilised MDPE formulations using HALS (Hindered Amine Light Stabilisers) and carbon black, providing long-term protection against UV-induced degradation and colour fading for outdoor water tanks, road products, and agricultural containers.
100% Recyclable and Sustainable
MDPE carries Resin Identification Code #4 (LDPE/MDPE family) and is fully recyclable. It can be reprocessed into secondary grades without significant loss of mechanical properties.
Applications of MDPE Rotomoulding Powder
Water Storage & Treatment
Drinking Water Tanks — Potable water storage tanks (100 litres to 100,000 litres) requiring BPA-free, non-toxic, odour-free inner surfaces.
Underground Water Tanks — Buried tanks requiring excellent ESCR and long-term soil-contact durability.
Overhead Tanks & Loft Tanks — Lightweight yet rigid containers for residential and commercial water storage.
Chemical & Industrial Storage
Chemical Storage Tanks — Tanks for acids, alkalis, fertilisers, and industrial chemicals where ESCR and chemical resistance are critical.
Waste Water / Effluent Tanks — Large-volume containers for industrial effluent collection and treatment.
Fuel Additives & Lubricants Storage — Containers for non-aromatic fuel additives and lubricant storage.
Agricultural & Rural Applications
Irrigation Tanks & Sprayer Tanks — Chemical-resistant containers for pesticides, herbicides, and liquid fertilisers used in field spraying equipment.
Livestock Water Troughs — Durable, UV-stabilised water troughs for cattle, poultry, and other livestock.
Grain & Feed Storage Hoppers — Large hoppers and bins for on-farm grain and animal feed storage.
Sanitation & Infrastructure
Septic Tanks & Bio-digesters — Large underground septic systems requiring outstanding ESCR and long service life.
Sanitation Units & Mobile Toilets — Self-contained portable sanitation structures for construction sites and events.
Road Barriers & Traffic Management Products — UV-resistant MDPE ensures long outdoor service life for water-filled road safety barriers.
Marine & Material Handling
Marine Buoys & Floats — MDPE’s toughness and UV resistance make it ideal for offshore and coastal buoys.
Bulk Bins & IBCs (Intermediate Bulk Containers) — Large industrial containers for transport and storage of dry and liquid materials.
Material Handling Pallets & Crates — Reusable, impact-resistant plastic pallets for logistics and warehousing.
Advantages of MDPE Rotomoulding Powder
Superior ESCR vs. Standard HDPE
MDPE’s moderate molecular branching delivers environmental stress crack resistance that significantly exceeds standard HDPE grades, greatly extending service life in chemical and agricultural storage applications.
Seamless, Leak-Proof Construction
Rotomoulded MDPE products have no welds, joints, or seams — eliminating common failure points and ensuring complete leak-proof integrity for liquid storage and containment applications.
Wide Processing Window
MDPE’s moderate melt viscosity provides a forgiving processing window, reducing sensitivity to oven temperature variations and making it easier to process consistently across a range of machine types.
Excellent Food-Contact Safety
Food-grade MDPE grades from Rototech are BPA-free, non-toxic, and compliant with food-contact regulations — suitable for potable water tanks and food storage containers.
Cost-Effective Long-Term Solution
MDPE’s combination of durability, chemical resistance, and minimal maintenance requirements delivers a superior total cost of ownership compared to metal, fibreglass, and concrete alternatives.
Disadvantages of MDPE Rotomoulding Powder
Lower Rigidity Compared to HDPE
MDPE is less stiff than HDPE; for applications requiring maximum structural rigidity under heavy load, HDPE or reinforced grades may be more appropriate.
Not Suitable for Very High-Temperature Applications
MDPE is a thermoplastic with a Vicat softening point of 110–125°C. It is not recommended for applications involving prolonged exposure to temperatures above 80°C.
Longer Processing Cycle vs. Injection Moulding
Rotational moulding has inherently longer cycle times compared to injection moulding or blow moulding, making it less suited for very high-volume, small-part production runs.
Why Choose Rototech for MDPE Rotomoulding Powder?
Industry-Leading Quality & Consistency
Every batch of Rototech MDPE Rotomoulding Powder is manufactured under strict quality control protocols, with full compliance to ASTM and in-house testing standards for MFI, density, ESCR, and particle size distribution.
Custom Formulations Available
From UV-stabilised outdoor grades to food-grade potable water formulations and chemical-resistant ESCR-enhanced compounds, we tailor every grade to your exact application and performance requirements.
Pan-India Reach & International Export
With a presence in 20+ Indian states and exports to 5+ countries, Rototech ensures reliable, on-time supply for manufacturers across India and internationally.
Competitive Bulk Pricing
We offer transparent, competitive pricing for orders of all sizes — from 500 kg MOQ to multi-tonne monthly contracts — with volume discounts for high-frequency buyers.
Dedicated Technical Support
Our technical team provides application-specific guidance on grade selection, processing parameters, colour matching, and additive customisation — from enquiry to production.
Points to Consider While Purchasing MDPE Rotomoulding Powder
Melt Flow Index (MFI)
Select the MFI range that matches your mould complexity. Lower MFI (3–4) is preferred for large, thick-walled products; higher MFI (5–6) suits thinner walls and intricate geometries.
ESCR Requirement
For chemical tanks, agricultural sprayers, or surfactant storage, confirm the ESCR rating of the chosen grade meets or exceeds ASTM D1693 requirements for your stored substances.
UV Stabilisation
For outdoor applications such as water tanks, road barriers, or agricultural containers, always specify a UV-stabilised grade to prevent photo-oxidative degradation and extend product life.
Food-Grade or Potable Water Compliance
If the end product will store drinking water or food, specify a food-grade MDPE formulation free of restricted additives and compliant with applicable food-contact regulations.
Colour and Additives
Decide on custom colours, carbon black content (for UV protection), flame-retardant additives, or antistatic packages early in the specification stage to ensure proper compounding lead times.
Supplier Certification & Batch Traceability
Always buy from manufacturers with documented QC procedures and batch-level test certificates covering density, MFI, and ESCR — essential for maintaining consistent end-product quality.
MDPE vs. LLDPE vs. HDPE — Rotomoulding Comparison
Property | MDPE Powder | LLDPE Powder | HDPE Powder |
Density (g/cm³) | 0.926 – 0.940 | 0.915 – 0.925 | 0.938 – 0.965 |
Flexibility | Moderate–High | High | Low–Moderate |
Stiffness / Rigidity | Medium | Low | High |
Impact Resistance | Very Good | Excellent | Good |
ESCR | Excellent | Good | Excellent (specific grades) |
UV Stability | Good (with additives) | Good (with additives) | Excellent |
Chemical Resistance | Good | Moderate | Excellent |
Typical Applications | Gas pipes, large tanks, containers | Flexible tanks, kayaks | Water tanks, road barriers |
Available Colours
Note: We can also make the Custom MDPE Rotomoulding Powder based on your requirements.
Application Industries
MDPE Rotomoulding Powder from Rototech is widely used across the following industries and applications:
Industry / Sector | Key Products / Applications |
Water & Sanitation | Overhead water tanks, underground tanks, septic tanks, water treatment vessels |
Agriculture | Irrigation tanks, sprayer tanks, livestock troughs, fertiliser storage containers |
Chemical Industry | Chemical storage tanks, effluent tanks, acid storage containers, solvent drums |
Infrastructure / Roads | Road safety barriers, traffic management products, cable ducts |
Marine | Buoys, floats, dock fenders, boat hulls, marine containers |
Material Handling | Bulk bins, IBCs, pallets, crates, industrial bins and hoppers |
Sanitation & Hygiene | Mobile toilets, portable sanitation units, septic chambers |
Cold Chain / Food | Ice boxes, insulated containers, food-grade storage vessels |
Construction | Temporary water storage, formwork components, safety equipment |
Municipal / Government | Dustbins, waste containers, public water supply tanks |
FAQs — MDPE Rotomoulding Powder
What is MDPE Rotomoulding Powder, and how does it differ from LLDPE and HDPE powders?
MDPE (Medium-Density Polyethylene) Rotomoulding Powder is manufactured from a polyethylene resin with a density in the range of 0.926–0.940 g/cm³ — precisely between LLDPE (~0.915–0.925 g/cm³) and HDPE (~0.941–0.965 g/cm³). This intermediate density gives MDPE a unique blend of properties: better stiffness than LLDPE, better toughness and ESCR than standard HDPE, and better flexibility than rigid HDPE grades. The result is a powder ideally suited to large-format containers and tanks that need to be rigid yet impact-resistant over long service lives.
What are the primary applications of MDPE Rotomoulding Powder?
The most common applications include potable water tanks (overhead and underground), chemical storage tanks, agricultural sprayer and irrigation tanks, septic tanks and bio-digesters, road safety barriers, marine buoys, livestock troughs, bulk bins, and portable sanitation units. MDPE is the industry standard for large-volume liquid containment applications where ESCR and long-term durability are critical.
What is the Melt Flow Index (MFI) of Rototech MDPE Rotomoulding Powder?
The standard MFI range is 3–6 g/10 min at 190°C / 2.16 kg load (ASTM D1238). Lower MFI grades (3–4 g/10 min) produce thicker, stronger walls and are preferred for heavy-duty tanks and chemical containers. Higher MFI grades (5–6 g/10 min) flow more readily, making them suitable for thinner walls, complex mould shapes, and faster cycles. Custom MFI grades are available on request.
What is the density of MDPE Rotomoulding Powder?
MDPE Rotomoulding Powder from Rototech has a density in the range of 0.926–0.940 g/cm³ as measured by ASTM D1505. This intermediate density is the defining characteristic of MDPE and is responsible for its balanced combination of toughness, stiffness, and ESCR.
What is ESCR, and why is it important for MDPE products?
ESCR (Environmental Stress Crack Resistance), measured by ASTM D1693, indicates a material’s resistance to cracking when subjected to mechanical stress in the presence of chemical agents such as detergents, surfactants, alcohols, and other stress-cracking agents. MDPE typically achieves ESCR values of ≥500 hours — significantly better than standard HDPE — making it the preferred material for tanks and containers that will store chemical solutions, agricultural chemicals, and cleaning agents over many years.
Is Rototech MDPE Rotomoulding Powder food-grade / safe for potable water?
Yes. Rototech offers food-grade MDPE formulations that are BPA-free, non-toxic, and free from restricted additives, making them fully suitable for potable water storage tanks and food-contact applications. Please specify food-grade compliance when placing your order so the correct formulation is supplied.
What UV stabilisation options are available for MDPE Rotomoulding Powder?
For outdoor applications, Rototech offers MDPE grades incorporating HALS (Hindered Amine Light Stabilisers) and/or carbon black to provide long-term resistance to UV-induced degradation. UV-stabilised grades are strongly recommended for water tanks, road barriers, agricultural containers, and marine products exposed to direct sunlight over extended periods.
What is the particle size distribution of MDPE Rotomoulding Powder?
Rototech MDPE powder is pulverised to a standard 35 mesh (approximately 500 microns) particle size distribution, optimised for uniform melting, even wall thickness, and bubble-free fusion in rotomoulding ovens. Custom grinds are available for specific mould and processing requirements.
What is the storage requirement for MDPE Rotomoulding Powder?
Bags should be stored in dry, covered conditions at temperatures below 50°C to maintain free-flowing powder properties and prevent moisture absorption or caking. Bags must be kept away from heat sources, direct sunlight, and strong oxidising agents. Shelf life is 24 months from the date of manufacture when stored under recommended conditions.
How does MDPE compare to HDPE for rotomoulded water tanks?
Both MDPE and HDPE are widely used for rotomoulded water tanks. MDPE offers significantly better ESCR, making it more resistant to long-term stress cracking from chemical contact and mechanical stresses in buried or constrained installations. HDPE provides higher stiffness and rigidity, which may be preferred for very large above-ground tanks that must resist internal hydrostatic pressure. For underground tanks, septic systems, and chemical storage, MDPE’s superior ESCR typically makes it the preferred choice.
What is the minimum order quantity and what packaging is available?
The minimum order quantity is 500 kilograms. Standard packaging is in 20 kg and 25 kg moisture-proof HDPE woven bags. Jumbo bags (500 kg and 1 MT) are available for bulk orders. Paid samples are available for evaluation prior to bulk ordering.
Can MDPE Rotomoulding Powder be customised for specific applications?
Yes. Rototech offers fully customised MDPE formulations including adjustments to MFI, density, UV stabiliser level, antioxidant package, colour, particle size, flame retardancy, and ESCR-enhancement additives. Custom compounds are developed in consultation with our technical team based on your specific end-product requirements and processing conditions.
What is the price range for MDPE Rotomoulding Powder?
MDPE Rotomoulding Powder is priced between ₹100 and ₹180 per kilogram, depending on grade, order quantity, additive package, and colour specification. Please contact Rototech for the current market price and volume discount structure.
Is MDPE Rotomoulding Powder recyclable?
Yes. MDPE is fully recyclable and carries Resin Identification Code #4 (LDPE/MDPE family). Scrap, off-cuts, and rejected mouldings can be reprocessed into secondary recycled grades without significant loss of key mechanical properties. Rototech also offers recycled/reprocessed grades for cost-sensitive applications where virgin-grade performance is not required.