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Insulation R Values: polyester
680 to 683
Insulation R-values and thermal conductivity data from NIST SRD 81 — covers fiberglass, foam, cellulose, mineral wool, and other building insulation materials
| material id | record id | date | delta t (F) | delta x (in) | density (lb/ft3) | description | form | k w mk (W/mK) | manufacturer | material | mean temp (F) | r value per inch (ft2hF/BTU/in) | rsi per inch (m2K/W/in) | standard | test method |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| polyester | 680 | 6/21/1949 | 23.96 | 0.9704 | 10.15 | Specimen pair unlike | Block | 0.3374 | NBS | Polyester | 71.2 | 0.427469 | 0.075282 | NIST SRD 81 API | ASTM C 177 |
| polyester | 683 | 7/20/1949 | 24.11 | 0.9874 | 9.543 | — | Block | 0.3677 | Monsanto Chemical Co. | Polyester | 71.43 | 0.392243 | 0.069078 | NIST SRD 81 API | ASTM C 177 |
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