Polyester in 1929: Carothers esters
Read the condition on Polyester before the nickname. Year 1929, line “Carothers esters,” figure 255. 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: low solid; fabrics trap air. Insulation score 50/100 is relative to 32 entries — metals lose, VIPs and aerogels win. Fire letter in editorial use: melts and drips unless FR. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide. Origin: Whinfield & Dickson 1941 / DuPont Dacron, United Kingdom / US. The process chapter follows feedstock → conversion → forming → finish → install.
Uses span buildings to defence / safety. Pairings matter: nylon. Circularity mark 34/100. Ask which scrap, which certificate, which year. Related atlas entries, a short glossary, and three threads that keep Polyester honest. The polyamide rival: tougher wet, different dye class. The blend that made drip-dry shirts.
Olefin cousin, different melting and hand. When polyester’s melt-drip is unacceptable. 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 Polyester, 1929, and 255. “Carothers esters” is the condition on the figure.1929
Figures to keep
- Year of the condition
- 1929
- Property figure
- 255
- Material
- Polyester
- Use line
- Carothers esters
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