PTFE in 1960s: Green pan lore
Read the condition on PTFE before the nickname. Year 1960s, line “Green pan lore,” figure 327. High-temp textile vs high-temp plastic. A material is what it is made of, the condition it survives, and where it goes afterward. PTFE under “Green pan lore” in 1960s should say which, with 327 tied to the condition. A figure with no condition is a boast. Readers meet the name on the back of a product, so the code and the history should not share one sentence.
Scores compare PTFE with the rest of the atlas on strength, heat, fire behaviour, insulation, workability and circularity. They are editorial, not certificates. Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.
PTFE ((C2F4)n) is a family of grades whose density ~2.2 g/cm³, heat band ~327 °C, and fire letter high OI but pyrolysis fumes. PTFE is sold as grades, not as a single substance. Chemistry (C2F4)n, density ~2.2 g/cm³, heat band ~327 °C. This atlas treats PTFE as a system: mill route, coatings, tests and the cavity it sits in.
Conductivity note: ~0.25 W/m·K. Insulation score 32/100 is relative to 32 entries — metals lose, VIPs and aerogels win. Fire letter in editorial use: high OI but pyrolysis fumes. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide. Origin: DuPont 1938 Plunkett, United States. The process chapter follows feedstock → conversion → forming → finish → install.
The label keeps PTFE, 1960s, and 327. “Green pan lore” is the condition on the figure.1960s
Figures to keep
- Year of the condition
- 1960s
- Property figure
- 327
- Material
- PTFE
- Use line
- Green pan lore
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