HDPE Granules / GP50 Granules
GP50 is a black, reprocessed high-density polyethylene compound supplied by Grano Pipe Industries for pipe manufacturing. The supplied technical data sheet describes a stabilized bimodal HDPE compound and records a typical melt flow index of 0.7–1 g/10 min at 190°C under a 5 kg load.
Available in 25 kg net moisture-proof bags, GP50 is accompanied by typical mechanical and processing properties to support material selection. Share your intended application, quantity and pipe sizes with our team to discuss your requirement.
GP50 Granules are a black HDPE compound intended for pipe production. The supplied data sheet describes a formulation based on selected bimodal HDPE resin with carbon black and antioxidant.
Its typical properties include a density of 0.950–0.962 g/cm³, tensile strength at yield of 19–22 MPa and elongation at break above 400%. The specification table also includes flexural modulus, notched impact strength, hardness, Vicat softening point and environmental stress crack resistance.
Packaging: 25 kg net moisture-proof poly bags.
Storage and handling: Store the granules in their original packaging in a shaded area, away from sunlight and moisture, at an ambient temperature not exceeding 50°C. The data sheet recommends use within 12 months of production and drying before use.
Review the technical data sheet alongside your processing and end-use requirements. Contact Grano Pipe Industries for further material information and to discuss your production needs.
| Property | Test Method (ASTM / ISO) | Unit | Typical Value |
|---|---|---|---|
| Density | ASTM D1505 / ISO 1183 | g/cm³ | 0.950–0.962 |
| Melt Flow Index (190°C / 5 kg) | ASTM D1238 / ISO 1133 | g/10 min | 0.7–1 |
| Tensile Strength at Yield | ASTM D638 / ISO 527 | MPa | 19–22 |
| Elongation at Break | ASTM D638 / ISO 527 | % | >400 |
| Flexural Modulus | ASTM D790 / ISO 178 | MPa | 700–900 |
| Izod Impact Strength (Notched, 23°C) | ASTM D256 / ISO 180 | J/m | >80 |
| Hardness (Shore D) | ASTM D2240 | — | 62 |
| Vicat Softening Point | ASTM D1525 / ISO 306 | °C | 120–125 |
| Environmental Stress Crack Resistance (ESCR) | ASTM D1693 | h | >900 |
| Colour | Visual | — | Black/Natural/Blue |
| Moisture Content | Internal Method | % | <0.2 |
Typical values from the supplied technical data sheet. The Colour row lists the sheet’s generic colour options; this page refers to the black variant.
Download the GP50 Granules technical data sheet for typical material properties, packaging and storage guidance.
The supplied technical data sheet identifies GP50’s black HDPE compound for pipe manufacturing.
The BLACK technical data sheet gives 0.7–1 g/10 min at 190°C under a 5 kg load, using ASTM D1238 / ISO 1133.
GP50 is supplied in 25 kg net moisture-proof poly bags.
GP50 is the black variant and GP20 is the blue variant. Their supplied data sheets list different melt flow and tensile-strength values. Compare the separate specification tables when discussing your production requirements.
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