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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site plastic fiber insulation Insulation made from recycled plastic bottles An insulation material made primarily from recycled plastic milk bottles (polyethylene terephthalate or PET). The fibers are then formed into batt insulation similar to high-density fiberglass. The insulation is treated with a fire retardant so it doesn't readily burn; however, it does melt when exposed to flame. The R-values of plastic fiber insulation vary with batt density: R-3.8 per inch at 1.0 lb./ft3 density to R-4.3 per inch at 3.0 lb/ft3 density. Plastic fiber insulation is relatively non-irritating to work with, but the batts reportedly can be difficult to handle and cut with standard tools. Related category    • INSULATION TOPICS Source: US Department of Energy Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP