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  2. List of insulation materials - Wikipedia

    en.wikipedia.org/wiki/List_of_insulation_materials

    R-value at 1 m (m 2 ·K/W) (cm) (in) (m 2 ·K/W) (ft 2 ·°F·h/BTU) Vacuum insulated panel: 2.54: 1 5.28–8.8: 14–66 [1] 208–346 Silica aerogel: 2.54: 1 1.76: 10.3 [2] 69 Polyurethane rigid panel (CFC/HCFC-expanded) initial 2.54: 1 1.23–1.41: 7–8: 48–56 Polyurethane rigid panel (CFC/HCFC-expanded) aged 5–10 years 2.54: 1 1.10: 6. ...

  3. Paper composite panels - Wikipedia

    en.wikipedia.org/wiki/Paper_composite_panels

    Since the last quarter of the 20th century, phenolic resin and cellulose based compound materials have been used as an alternative to ebony and rosewood to make stringed instrument fingerboards. [3] From 2012 to 2018 guitarmaker Gibson used Richlite , a paper composite material, for the fingerboard on several top-of-the-line production guitars.

  4. Phenolic paper - Wikipedia

    en.wikipedia.org/wiki/Phenolic_paper

    Phenolic paper is a material often used to make printed circuit board substrates (the flat board to which the components and traces are attached). It is a very tough board made of wood fibre and phenolic polymers. It is most commonly brown in colour, and is a fibre reinforced plastic. These PCB materials are known as FR-1 and FR-2 – FR-2 is ...

  5. Plywood - Wikipedia

    en.wikipedia.org/wiki/Plywood

    The most commonly used thickness range is from 1 ⁄ 8 to 3 inches (3.2–76.2 mm). The sizes of the most commonly used plywood sheets are 4 by 8 feet (1,220 mm × 2,440 mm) [ 20 ] which was first used by the Portland Manufacturing Company, who developed modern veneer core plywood for the 1905 Portland World Fair.

  6. Waferboard - Wikipedia

    en.wikipedia.org/wiki/Waferboard

    Waferboard belongs to the subset of reconstituted wood panel products called flakeboards. [1] It is a structural material made from rectangular wood flakes of controlled length and thickness bonded together with waterproof phenolic resin under extreme heat and pressure. The layers of flakes are not oriented, which makes it easier to manufacture.

  7. Building insulation material - Wikipedia

    en.wikipedia.org/wiki/Building_insulation_material

    Typically R-5.6 (RSI-0.99) [10] or slightly better after stabilization – higher values (at least R-7, or RSI-1.23) in stabilized boards. [11] Less flammable than polyurethane. Phenolic injection foam Such as Tripolymer R-5.1 per inch (ASTM-C-177). Known for its air sealing abilities.

  8. Puzzle solutions for Wednesday, Nov. 20, 2024

    www.aol.com/news/puzzle-solutions-wednesday-nov...

    Find answers to the latest online sudoku and crossword puzzles that were published in USA TODAY Network's local newspapers.

  9. Phenol formaldehyde resin - Wikipedia

    en.wikipedia.org/wiki/Phenol_formaldehyde_resin

    Phenolic resins are also used for making exterior plywood commonly known as weather and boil proof (WBP) plywood because phenolic resins have no melting point but only a decomposing point in the temperature zone of 220 °C (428 °F) and above. Phenolic resin is used as a binder in loudspeaker driver suspension components which are made of cloth.

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