Natural Rubber · Caramel Rubber (NR) · Antacid Gum
- The rubber or gum natural, also called rubber or candy gum is excellent for its recovery properties .
- Offers good resistance to most inorganic salts and weak acids and bases.
- However it is not recommended for use with oils and solvents, or where exposure to ozone, oxygen or >sunlight is noticeable.
- It has excellent mechanical properties and high resistance to abrasion.
- Due to its chemical properties, it is known as antacid rubber
| Property | Unit | Test | Value |
| Color | Caramel | ||
| Specific weight | gr/cm3 | 1,00 | |
| Indentation hardness | Shore A | ASTM D2240 | 43 |
| Breaking load | MPa | ASTM D412 | 20,0 |
| Elongation at break | % | ASTM D412 | 650 |
| Tearing | N/mm | ASTM D624 Die C | 30 |
| Abrasion resistance | mm3 | DIN 53516 (5N) | 80 |
| Temperatures | ºC | -40 / 80 | |
Thermal aging (70ºC 70h) | Shore A % % | ASTM D573 | 5 -15 -25 |
Permanent deformation (70ºC 22h) | ASTM D395 Método B | 30 | |
| Chemical Resistances: | |||
| to Ozone | Moderate | ||
| to dilute acids and bases | EXCELLENT | ||
| to concentrated acids and bases | Good | ||
| to hydrocarbons | Not recommended | ||
| to organic solvents | Not recommended | ||
