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  2. Twinwall plastic - Wikipedia

    en.wikipedia.org/wiki/Twinwall_plastic

    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] These attributes, coupled with a service temperature range in excess of 120 °C (-51 °C to 71 °C), makes polycarbonate the ideal material for twinwall application.

  3. Vapor barrier - Wikipedia

    en.wikipedia.org/wiki/Vapor_barrier

    Polyethylene plastic sheet, 4 or 6 thou (0.10 or 0.15 mm), 0.03 US perm (1.7 SI perm). Advanced Polyethylene vapor retarders that pass the ASTM E 1745 standard tests ≤0.3 US perm (17 SI perm). Asphalt-coated kraft paper, often attached to one side of fiberglass batts, 0.40 US perm (22 SI perm). Metallized film

  4. Polycarbonate - Wikipedia

    en.wikipedia.org/wiki/Polycarbonate

    (OC 6 H 4) 2 C(CH 3) 2 CO ) n + O 2, R* → (OC 6 H 4) 2 C(CH 3 CH 2)CO) n. This product can be further oxidized to form smaller unsaturated compounds. This can proceed via two different pathways, the products formed depends on which mechanism takes place. [38] Pathway A (OC 6 H 4) 2 C(CH 3 CH 2)CO + O 2, H* HO(OC 6 H 4)OCO + CH 3 COCH 2 (OC 6 ...

  5. Closed-cell PVC foamboard - Wikipedia

    en.wikipedia.org/wiki/Closed-cell_PVC_foamboard

    It is available in densities varying from 3 to 25 pounds per cubic foot (0.048 to 0.400 g/cm 3). [ 3 ] It has a low flammability rate. [ 4 ] A universal cross-linked closed-cell PVC that was used in a comparison with three heat-resistant cross-linked had a glass temperature of 83.2 °C.

  6. Polycarbonate (functional group) - Wikipedia

    en.wikipedia.org/wiki/Polycarbonate_(functional...

    A polycarbonate is an oxocarbon dianion consisting of a chain of carbonate units, where successive carbonyl groups are directly linked to each other by shared additional oxygen atoms. That is, they are the conjugate bases of polycarbonic acids , the conceptual anhydrides of carbonic acid , or polymers of carbon dioxide .

  7. Flour Bugs Are a Real Thing—Here’s an Easy Way to ... - AOL

    www.aol.com/lifestyle/flour-bugs-real-thing-easy...

    A food safety expert weighs in on flour bugs, also known as weevils, that can infest your pantry after one TikToker found her flour infested with the crawlers.

  8. Jay Leno Says He Only Sleeps 4 Hours a Night and Never Drinks ...

    www.aol.com/jay-leno-says-only-sleeps-223106981.html

    Related: Jay Leno Steps Out in Los Angeles with Bruised Face, Broken Wrist After Rolling 60 Ft. Down a Hill. The comedian is currently gearing up to embark on a 2025 tour, which will see him make ...

  9. Plastic film - Wikipedia

    en.wikipedia.org/wiki/Plastic_film

    Film strip (photographic film) 6 mil polyethylene plastic sheet as vapor barrier in construction Confectionery packaging made of PLA-blend bio-flex bioplastic Shrink-wrapped OH-58 Kiowa helicopters to be shipped. Plastic film is a thin continuous polymeric material. Thicker plastic material is often called a "sheet".

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