ASTM International - ASTM D2227-96(2020)
Standard Specification for Natural Rubber (NR) Technical Grades
|Publication Date:||1 June 2020|
|ICS Code (Latex and raw rubber):||83.040.10|
significance And Use:
4.1 The general end-use quality of manufactured rubber products depends on the physical and chemical properties of the rubber.
1.1 This specification covers minimum physical and chemical quality requirements or specifications for five grades of raw natural rubber.
1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
This specification covers the minimum physical and chemical requirements for five technical grades of raw natural rubber. Materials are classified into grades according to retained dirt content,... View More
This specification covers the minimum physical and chemical requirements for five technical grades of raw natural rubber. Materials are classified into grades according to retained dirt content, ash content, volatile matter content, nitrogen content, initial plasticity, plasticity retention index, color index, and Mooney viscosity. Skim rubber is not permitted in any grade.View Less