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2. Polystyrene - Wikipedia

   en.wikipedia.org/wiki/Polystyrene

   Due to the low density of polystyrene foam, it is not economical to collect. However, if the waste material goes through an initial compaction process, the material changes density from typically 30 kg/m 3 to 330 kg/m 3 and becomes a recyclable commodity of high value for producers of recycled plastic pellets.

3. List of insulation materials - Wikipedia

   en.wikipedia.org/wiki/List_of_insulation_materials

   Extruded expanded polystyrene (XPS) high-density 2.54: 1 0.88–0.95: 5–5.4: 26–40 [3] Polystyrene board [6] 2.54: 1 ... High-density fiberglass batts 2.54: 1 0. ...

4. Building insulation material - Wikipedia

   en.wikipedia.org/wiki/Building_insulation_material

   Foil-faced polystyrene. This laminated, high density EPS is more flexible than rigid panels, works as a vapor barrier, and works as a thermal break. Uses include the underside of roof sheathing, ceilings, and on walls. For best results, this should not be used as a cavity fill type insulation. Foil-backed bubble pack.

5. List of synthetic polymers - Wikipedia

   en.wikipedia.org/wiki/List_of_synthetic_polymers

   Low-density polyethylene (LDPE) High-density polyethylene (HDPE) Polypropylene (PP) polyethylene (PP) Polyvinyl chloride (PVC) Polystyrene (PS) formaldehyde. Nylon, nylon 6, nylon 6,6; Teflon (Polytetrafluoroethylene) Thermoplastic polyurethanes (TPU)

6. Styrofoam - Wikipedia

   en.wikipedia.org/wiki/Styrofoam

   Styrofoam insulation extruded polystyrene foam (XPS), owned and manufactured by DuPont. Styrofoam is a genericized trademarked brand of closed-cell extruded polystyrene foam (XPS), manufactured to provide continuous building insulation board used in walls, roofs, and foundations as thermal insulation and as a water barrier.

7. High-density polyethylene - Wikipedia

   en.wikipedia.org/wiki/High-density_polyethylene

   HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]