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  2. Polymer80 - Wikipedia

    en.wikipedia.org/wiki/Polymer80

    Polymer80, Inc. was an American manufacturer of firearms parts kits that included unfinished receivers (also known as "80 percent" receivers) used for making privately made firearms. The company was founded in 2013 by Loran Kelley Jr. and David Borges and was headquartered in Dayton, Nevada .

  3. IEEE P80 - Wikipedia

    en.wikipedia.org/wiki/IEEE_P80

    IEEE standard P80 is a technical standard of the Institute of Electrical and Electronics Engineers (IEEE), governing outdoor AC substations (although under special circumstances it may also be applied to indoor AC substations). [1]

  4. List of ISO standards 2000–2999 - Wikipedia

    en.wikipedia.org/wiki/List_of_ISO_standards_2000...

    ISO 2631-1:1997 Part 1: General requirements; ISO 2631-2:2003 Part 2: Vibration in buildings (1 Hz to 80 Hz) ISO 2631-3:1985 Part 3: Evaluation of exposure to whole-body z-axis vertical vibration in the frequency range 0,1 to 0,63 Hz [Withdrawn: replaced with ISO 2631-1]

  5. Polymer characterization - Wikipedia

    en.wikipedia.org/wiki/Polymer_characterization

    Polymer morphology is a microscale property that is largely dictated by the amorphous or crystalline portions of the polymer chains and their influence on each other. Microscopy techniques are especially useful in determining these microscale properties, as the domains created by the polymer morphology are large enough to be viewed using modern ...

  6. Comparative Tracking Index - Wikipedia

    en.wikipedia.org/wiki/Comparative_Tracking_Index

    The Comparative Tracking Index (CTI) is used to measure the electrical breakdown (tracking) properties of an insulating material.Tracking is an electrical breakdown on the surface of an insulating material wherein an initial exposure to electrical arcing heat carbonizes the material.

  7. Heat deflection temperature - Wikipedia

    en.wikipedia.org/wiki/Heat_deflection_temperature

    The heat deflection temperature or heat distortion temperature (HDT, HDTUL, or DTUL) is the temperature at which a polymer or plastic sample deforms under a specified load. [1] This property of a given plastic material is applied in many aspects of product design, engineering and manufacture of products using thermoplastic components.

  8. Poly(p-phenylene oxide) - Wikipedia

    en.wikipedia.org/wiki/Poly(p-phenylene_oxide)

    A printer cartridge made of PPE and polystyrene; it is an example of a product which requires good dimensional stability and accuracy to fit.. PPE blends are used for structural parts, electronics, household and automotive items that depend on high heat resistance, dimensional stability and accuracy.

  9. Relative thermal index - Wikipedia

    en.wikipedia.org/wiki/Relative_thermal_index

    A maximum correlation time of 60.000 hours is considered acceptable for many electrical applications, however it may also become as low as 5.000 hours according to UL 746B. If a material has not been investigated (yet), the RTI shown is based on the generic class (polymer type) of the material. Though the RTI is an index, it is given in Celsius ...