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  2. Twinwall plastic - Wikipedia

    en.wikipedia.org/wiki/Twinwall_plastic

    Although single layer polycarbonate sheeting is more flexible than polycarbonate in twinwall configuration, it still retains significant advantages over alternative materials, including glass. A typical 6mm sheet has a density of 0.72 g/cm^2 [6] and a thermal insulation R value of 0.3 m^2°C/W, while allowing 80% of visible light pass through. [7]

  3. Polycarbonate - Wikipedia

    en.wikipedia.org/wiki/Polycarbonate

    Other applications, including polycarbonate sheets, may have the anti-UV layer added as a special coating or a coextrusion for enhanced weathering resistance. Polycarbonate is also used as a printing substrate for nameplate and other forms of industrial grade under printed products. The polycarbonate provides a barrier to wear, the elements ...

  4. Cross-linked polyethylene - Wikipedia

    en.wikipedia.org/wiki/Cross-linked_polyethylene

    A cross-linked polyethylene (PEX) pipe. Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links.It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, insulation for high tension (high voltage) electrical cables, and baby play mats.

  5. Polystyrene - Wikipedia

    en.wikipedia.org/wiki/Polystyrene

    Sheets of EPS are commonly packaged as rigid panels (common in Europe is a size of 100 cm x 50 cm, usually depending on an intended type of connection and glue techniques, it is, in fact, 99.5 cm x 49.5 cm or 98 cm x 48 cm; less common is 120 x 60 cm; size 4 by 8 ft (1.2 by 2.4 m) or 2 by 8 ft (0.61 by 2.44 m) in the United States). Common ...

  6. Philippine passport - Wikipedia

    en.wikipedia.org/wiki/Philippine_passport

    During the Spanish colonization of the Philippines, the Spaniards introduced a travel document to the Philippines called the chapa, or a writ of safety to go from one place to another, which the natives used from the 16th to 17th centuries. [2] Philippine passports were released after gaining independence from the United States in 1946.

  7. Nanofiltration - Wikipedia

    en.wikipedia.org/wiki/Nanofiltration

    Membrane materials that are commonly used are polymer thin films such as polyethylene terephthalate or metals such as aluminium. [2] Pore dimensions are controlled by pH, temperature and time during development with pore densities ranging from 1 to 106 pores per cm 2.

  8. List of piezoelectric materials - Wikipedia

    en.wikipedia.org/wiki/List_of_piezoelectric...

    The following table lists the following properties for piezoelectric materials The piezoelectric coefficients (d 33, d 31, d 15 etc.) measure the strain induced by an applied voltage (expressed as meters per volt).

  9. Wood preservation - Wikipedia

    en.wikipedia.org/wiki/Wood_preservation

    The depth obtained during regular steeping periods varies from 5 to 10 mm (0.20 to 0.39 in) up to 30 mm (1.2 in) by sap pine. Due to the low absorption, solution strength should be somewhat stronger than that in pressure processes, around 5% for seasoned timber and 10% for green timber (because the concentration slowly decreases as the ...

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