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2. Twinwall plastic - Wikipedia

   en.wikipedia.org/wiki/Twinwall_plastic

   Roofing sheets made from twinwall plastic are primarily 10mm thick, however, they are also available in greater thicknesses such a 16mm, 25mm and 35mm. Any thickness over 10mm would usually be called a Multiwall Plastic Sheet due to having multiple internal layers. Twinwall plastic can refer to several different extruded polymers including:

3. Polycarbonate - Wikipedia

   en.wikipedia.org/wiki/Polycarbonate

   extrusion with cylinders into sheets (0.5–20 mm (0.020–0.787 in)) and films (below 1 mm (0.039 in)), which can be used directly or manufactured into other shapes using thermoforming or secondary fabrication techniques, such as bending, drilling, or routing. Due to its chemical properties it is not conducive to laser-cutting.

4. Corrugated plastic - Wikipedia

   en.wikipedia.org/wiki/Corrugated_plastic

   Corrugated plastic box used as reusable packaging Corrugated plastic dividers used to pack automotive components A Velomobile enclosed in corrugated plastic. Corrugated plastic or corriboard – also known under the trade names of Correx, Biplex, Cartonplast, Polyflute, Coroplast, FlutePlast, IntePro, Proplex, Twinplast, Corriflute and Corflute – refers to a wide range of extruded twin-wall ...

5. Carbon nanotube - Wikipedia

   en.wikipedia.org/wiki/Carbon_nanotube

   Researchers suggested that it can be either (5,1) or (4,2) SWCNT, but the exact type of the carbon nanotube remains questionable. [21] (3,3), (4,3), and (5,1) carbon nanotubes (all about 0.4 nm in diameter) were unambiguously identified using aberration-corrected high-resolution transmission electron microscopy inside double-walled CNTs. [22]

6. Polypropylene carbonate - Wikipedia

   en.wikipedia.org/wiki/Polypropylene_carbonate

   Polypropylene carbonate is soluble in polar solvents like lower ketones, ethyl acetate, dichloromethane and chlorinated hydrocarbons and insoluble in solvents like alcohols, water, and aliphatic hydrocarbons.

7. Comparative Tracking Index - Wikipedia

   en.wikipedia.org/wiki/Comparative_Tracking_Index

   To measure the tracking, 50 drops of 0.1% ammonium chloride solution are dropped on the material, and the voltage measured for a 3 mm thickness is considered representative of the material performance. Also term PTI (Proof Tracking Index) is used: it means voltage at which during testing on five samples the samples pass the test with no failures.