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  2. Sandpaper - Wikipedia

    en.wikipedia.org/wiki/Sandpaper

    Sandpaper backings may be glued to the paper or form a separate support structure for moving sandpaper, such as used in sanding belts and discs. Stronger paper or backing increases the ease of sanding wood. The harder the backing material, the faster the sanding, the faster the wear of the paper and the rougher the sanded surface.

  3. Composite material - Wikipedia

    en.wikipedia.org/wiki/Composite_material

    However, under particular process conditions, it can deform. The melding event for a thermoset polymer matrix material is a curing reaction that is caused by the possibility of extra heat or chemical reactivity such as an organic peroxide. The melding event for a thermoplastic polymeric matrix material is a solidification from the melted state.

  4. Polymer - Wikipedia

    en.wikipedia.org/wiki/Polymer

    Polymer nomenclature is generally based upon the type of monomer residues comprising the polymer. A polymer which contains only a single type of repeat unit is known as a homopolymer, while a polymer containing two or more types of repeat units is known as a copolymer. [22] A terpolymer is a copolymer which contains three types of repeat units ...

  5. Pounce (powder) - Wikipedia

    en.wikipedia.org/wiki/Pounce_(powder)

    Pounce is gently sprinkled all over the writing on the paper. When using a quill or a steel nib, and with inks that are made up to match those typically in use during the 18th and 19th centuries, and provided the pen has been used with the fine strokes typical of handwriting of that period, the handwriting will be sufficiently dry within 10 seconds to allow the paper to be folded without blotting.

  6. Alkyd - Wikipedia

    en.wikipedia.org/wiki/Alkyd

    Alkyd or oil-urethane binders are used in casting for the creation of sand-based moulds. The alkyd resin is mixed with a polymeric isocyanate and a metallic drier, which speeds up the reaction. [9] Unlike other no-bake mould technologies, the process yields no toxic fumes, but the moulds need more air-curing time. [10]

  7. Superabsorbent polymer - Wikipedia

    en.wikipedia.org/wiki/Superabsorbent_polymer

    Superabsorbent polymers are now commonly made from the polymerization of acrylic acid blended with sodium hydroxide in the presence of an initiator to form a poly-acrylic acid sodium salt (sometimes referred to as sodium polyacrylate). This polymer is the most common type of SAP made in the world today.

  8. Pavers (flooring) - Wikipedia

    en.wikipedia.org/wiki/Pavers_(flooring)

    This raised concrete sand helps lock the pavers in place so that they can handle more weight. [9] [10] Concrete sand is a more preferable bedding layer than rock dust. Because rock dust retains rather than drains water, it prevents polymeric sand from drying and curing.

  9. Geosynthetics - Wikipedia

    en.wikipedia.org/wiki/Geosynthetics

    Geofoam is a polymeric product created by processing polystyrene into a foam consisting of many closed cells filled with air and/or gases. The skeletal nature of the cell walls resembles bone-structures made of the unexpanded polymeric material.

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