Made from an elastomer derived from rubber shaft (Hevea Brasiliensis), these balls have excellent mechanical properties, as well as high resistance to abrasion, friction, compression and low temperatures. Although they are not optimal against UV rays, they stand out for their durability. Marteau-Lemarie, with 40 years of expertise, assures you a stock available in France for fast delivery and personalized accompaniment.
Physical characteristics of natural rubber ball (nr)
| Ownership | Value | Unit |
|---|---|---|
| Density | 1.32 | g/cm3 |
| Young Module | 5 | MPa |
| Thermal expansion coefficient | 180 (T=0-100°C) | × 10−6 /°C |
| Thermal conductivity | 0.14 | W/m·K |
| Electrical resistivity | >10^19 | D·mm2/m |
| Relative magnetic permeability | <~1 | — |
| Magnetic behaviour | Diamagnetic | — |
| Friction coefficient | 0.85 | — |
| Fracture extension | max 700 | % |
| Remanent compression | 20 (70° 22h) | % |
Hardness and mechanical strength of natural rubber ball (nr)
| Ownership | Value | Unit |
|---|---|---|
| Hardness | 40-80 | Shore A |
| Tensile failure load | 10-25 | MPa |
| Tensile failure load | 1,45-3,63 | psix10^3 |
| Exercise temperatures | -50/80 | ° C |
| Exercise temperatures | -58/176 | °F |
Diameters and grades available for natural rubber ball (nr)
| Parameter | Value |
|---|---|
| Minimum diameter | 2 mm — 3/32′′′ |
| Maximum diameter | 152.4 mm — 6′′′ |
| Grades available | III |
Corrosion resistance of natural rubber ball (nr)
Good resistance to contact with water, acids and diluted bases, alcohols. Pretty good contact with ketones. Low resistance to contact with steam, oils, gasoline and aromatic hydrocarbons, oxygen, nitrogen.
Applications of natural rubber ball (nr)
Excellent sealing elements, especially in contact with metals, they are commonly used in various types of pumps and valves. Also employed in the toy and sports sector (golf balls).
Hardness available: 40-50/50-65/65-75/70-80 Shore A
