Polyethylene in 1898: von Pechmann
The behaviour of Polyethylene is written as 1898’s “von Pechmann,” fixed by 110. An advert’s adjective is not a melting point. “Room temperature” alone is not a figure. The world’s volume plastic — bags, bottles, pipes and the UHMWPE cousin in medical and ballistic fibre.
Polyethylene is one of 32 materials in this atlas, grouped under polymers: history, structure, measured properties, process routes, uses, safety and market — not a product catalogue. Scores compare Polyethylene 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. Polyethylene ((C2H4)n) is a family of grades whose density 0.91–0.97 g/cm³, heat band LDPE ~110 °C; HDPE ~130 °C, and fire letter combustible olefin.
Polyethylene is sold as grades, not as a single substance. Chemistry (C2H4)n, density 0.91–0.97 g/cm³, heat band LDPE ~110 °C; HDPE ~130 °C. This atlas treats Polyethylene as a system: mill route, coatings, tests and the cavity it sits in. Conductivity note: ~0.4 W/m·K. Insulation score 44/100 is relative to 32 entries — metals lose, VIPs and aerogels win.
“von Pechmann” for Polyethylene in 1898 carries 110. Praise without that figure is not a property.1898
Figures to keep
- Year of the condition
- 1898
- Property figure
- 110
- Material
- Polyethylene
- Use line
- von Pechmann
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