Natural rubber in : Olmec balls
Read the condition on Natural rubber before the nickname. Year , line “Olmec balls,” figure 1. Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.
Conductivity note: ~0.15 W/m·K. Insulation score 38/100 is relative to 32 entries — metals lose, VIPs and aerogels win. Fire letter in editorial use: combustible; tyres are a fire load. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide. Origin: Mesoamerican use / Goodyear 1839 / Wickham 1876, Amazonia → Malaysia. The process chapter follows feedstock → conversion → forming → finish → install.
Uses span buildings to defence / safety. Pairings matter: silicone. Circularity mark 46/100. Ask which scrap, which certificate, which year. Related atlas entries, a short glossary, and three threads that keep Natural rubber honest. The high-temp elastomer NR cannot be. Another C-H chain, thermoplastic not elastic.
Bead wire and belts in radial tyres. EN 13501-1 reaction-to-fire letter (A1–F), not a wall rating. Thermal conductivity in W/m·K. Lower means better bulk insulation. Declared performance after blowing-agent or moisture drift. The zone where heat or chemistry changes the datasheet.
The label keeps Natural rubber, , and 1. “Olmec balls” is the condition on the figure.1
Figures to keep
- Year of the condition
- 1
- Property figure
- 1
- Material
- Natural rubber
- Use line
- Olmec balls