Standard Malaysian rubber 20 (SMR20)
Standard Malaysia rubber 20 (SMR20) is a revolutionary change in the grading and presentation of natural rubber in the struggle with synthetic rubber. Hence the Standard Malaysian Rubber (SMR20) scheme has a crucial role to play in the process of securing the status quo which natural rubber had been enjoying before the establishment of the synthetic industry. Standard Malaysian rubber (SMR20) is fast becoming a household word both among natural rubber (NR) producers and consumers.
It was first introduced as the result of a long felt need to improve the system of quality grading and presentation of Malaysian natural rubber NR. Formally launched by the minister for commerce and industry in 1965, the Standard Malaysian Rubber 20 (SMR20) scheme has , over the years, establishment full buyers confidence in the technical grading system adopted and consumers have unreservedly accepted the improvements in the presentation of Standard Malaysian Rubber 20 (SMR20).
Prior to the advancement of the Standard Malaysian Rubber 20 (SMR20) scheme natural rubber was only available in the conventional form of the sheets and creeps. The only method of grading was by visual appraisal. Color is the main concern of the producers. Hence the visual method of grading , Created many different classes and types and crepe rubber. As a result, buyers lost confidence in natural rubber because there is no guarantee of uniform quality and properties between the grades. Presentation is the accrued rubber itself, often viewed as the pool relative
| Parameter Unit | Unit | SMR CV50 | SMR CV60 | SMR L | SMR 5 | SMR GP | SMR 10 | SMR 10CV | SMR 20 | SMR 20CV |
| Dirt (max) | % wt | 0.02 | 0.02 | 0.02 | 0.05 | 0.08 | 0.08 | 0.08 | 0.16 | 0.16 |
| Ash (max) | % wt | 0.50 | 0.50 | 0.50 | 0.60 | 0.75 | 0.75 | 0.75 | 1.00 | 1.00 |
| Nitrogen (max) | % wt | 0.60 | 0.60 | 0.60 | 0.60 | 0.60 | 0.60 | 0.60 | 0.60 | 0.60 |
| Volatile Matter (max) | % wt | 0.80 | 0.80 | 0.50 | 0.80 | 0.80 | 0.80 | 0.80 | 0.80 | 0.80 |
| Po (min) | % wt | NA | NA | 35 | 30 | NA | 30 | NA | 30 | NA |
| PRI index (min) | 60 | 60 | 60 | 60 | 50 | 50 | 50 | 40 | 40 | |
| Lovibond Color: individual value (max) | NA | NA | 6.0 | NA | NA | NA | NA | NA | NA | |
| Lovibond Color: range (max) | NA | NA | 2.0 | NA | NA | NA | NA | NA | NA | |
| Mooney Viscosity (ML, 1, 100°C) | 50 | 60 | NA | NA | 65 | NA | ||||
SMR 20 (Standard Malaysian Rubber 20) are natural rubbers graded by technical specifications, not by the conventional visual standards. Malaysian Rubber 20 (SMR20) rubbers represent very high quality, clean latex grades of natural rubber. This product is known as one of the most valuable types of natural rubber in the world, which has attracted a wide market due to its organic nature and high elasticity. This natural rubber indicates very high and pure latex standards, which has the highest quality and the best features. This category of natural rubbers has been tested many times in industry and its quality and viscosity are carefully controlled , here is properties of SMR20.
Property | SMR20 |
Dirt content (% max. on 40 mesh) | 0.20 |
Ash content (% max.) | 1.00 |
Nitrogen content (% max.) | 0.60 |
Volatile matter (% max.) | 0.80 |
Wallace platicity Po (min.) | 30 |
Plasticity retension index (% min.) | 40 |