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Polycarbonate is commonly used in eye protection, as well as in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Polycarbonate lenses also protect the eye from UV light.
Kinetic sand in a box as an office toy. Hydrophobic sand (or magic sand) is a toy made from sand coated with a hydrophobic compound. The presence of the hydrophobic compound causes the grains of sand to adhere to one another and form cylinders (to minimize surface area) when exposed to water, and form a pocket of air around the sand. [1]
[34] [35] Additives are therefore one of the reasons why plastic is used so widely. [36] Plastics are composed of chains of polymers. Many different chemicals are used as plastic additives. A randomly chosen plastic product generally contains around 20 additives. The identities and concentrations of additives are generally not listed on ...
Overall, sand and ASA plastic mixtures were found to be an adequate substitute for asphalt mixtures typically used for road surfaces. [7] ASA and sand can also be used in 3D printing and injection molding as a low-cost method of distributed recycling. [8] Compared to polycarbonate, ASA has higher resistance to environmental stress cracking, and ...
Sand animation: Performance artists draw images in sand. Makers of animated films use the same term to describe their use of sand on frontlit or backlit glass. Sand casting: Casters moisten or oil molding sand, also known as foundry sand and then shape it into molds into which they pour molten material. This type of sand must be able to ...
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 ...
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Sand mixed with potash and heat coalesced into pearls of water glass. Small round panes of water glass were first industrially manufactured for used as windows in the 19th century by Van Baerle in Gernsheim and Johann Gottfried Dingler in Augsburg. Johann Nepomuk von Fuchs made the first attempts to create paints with water glass.