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  2. Low-density polyethylene - Wikipedia

    en.wikipedia.org/wiki/Low-density_polyethylene

    LDPE has SPI resin ID code 4 Schematic of LDPE branching structure. Low-density polyethylene (LDPE) is a thermoplastic made from the monomer ethylene.It was the first grade of polyethylene, produced in 1933 by John C. Swallow and M.W Perrin who were working for Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerization. [1]

  3. Nalgene - Wikipedia

    en.wikipedia.org/wiki/Nalgene

    Nalgene is a brand of plastic products developed originally for laboratory use, including items such as jars, bottles, test tubes, and Petri dishes, that were shatterproof and lighter than glass. The properties of plastic products make them suitable for work with many substances in various temperature ranges.

  4. Weather testing of polymers - Wikipedia

    en.wikipedia.org/wiki/Weather_testing_of_polymers

    The source has a central position and the samples are fixed on a sample holder animated by a uniform rotational movement around the source. The analysis of the chemical evolution under the accelerated conditions of a SEPAP 12-24 or MHE units and the analysis of the chemical evolution in an early phase of exposure in outdoor use in the field (1 ...

  5. Linear low-density polyethylene - Wikipedia

    en.wikipedia.org/.../Linear_low-density_polyethylene

    LLDPE has penetrated almost all traditional markets for polyethylene; it is used for plastic bags and sheets (where it allows using lower thickness than comparable LDPE), plastic wrap, stretch wrap, pouches, toys, covers, lids, pipes, buckets and containers, covering of cables, geomembranes, [1] and mainly flexible tubing. In 2013, the world ...

  6. Toxicity characteristic leaching procedure - Wikipedia

    en.wikipedia.org/wiki/Toxicity_characteristic...

    Toxicity characteristic leaching procedure (TCLP) is a soil sample extraction method for chemical analysis employed as an analytical method to simulate leaching through a landfill. The testing methodology is used to determine if a waste is characteristically hazardous, i.e., classified as one of the "D" listed wastes by the U.S. Environmental ...

  7. Geomembrane - Wikipedia

    en.wikipedia.org/wiki/Geomembrane

    Lifetime prediction methods use the following means of interpreting the data: Stress limit testing: A method by the HDPE pipe industry in the United States for determining the value of hydrostatic design basis stress. Rate process method: Used in Europe for pipes and geomembranes, the method yields similar results as stress limit testing.