JIS K 6380 standard, titled "Rubber packing material -- Classification system," provides a critical framework for identifying and categorizing rubber materials used in sealing and packing applications. While the full PDF is a copyrighted document published by the Japanese Standards Association (JSA)
The standard uses a coded system to define the performance characteristics of a rubber material: Type (Heat Resistance): jis k 6380 pdf
Measures volume changes when exposed to test oils, which is vital for automotive and machinery seals. Application & Material Compatibility JIS K 6380:1999 Rubber packing material - Intertek Inform JIS K 6380 standard, titled "Rubber packing material