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2. High-density polyethylene - Wikipedia

   en.wikipedia.org/wiki/High-density_polyethylene

   HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]

3. Pipe cleaner - Wikipedia

   en.wikipedia.org/wiki/Pipe_cleaner

   A plain white pipe cleaner A model of a cat made from pipe cleaners A sculpture of a bird made from pipe cleaners. A pipe cleaner or chenille stem or furry wire is a type of brush originally intended for removing moisture and residue from smoking pipes [citation needed]. They can also be used for any application that calls for cleaning out ...

4. Chemical drain cleaners - Wikipedia

   en.wikipedia.org/wiki/Chemical_drain_cleaners

   The reaction is exothermic, releasing heat to soften the fats. Drain cleaners can also contain aluminum, which reacts with sodium hydroxide to produce bubbles of hydrogen gas that help to break up the clog. [11] The pressure buildup by gas generation can cause weaker pipes to burst, [11] and the heat generation can also soften plastic PVC pipes.

5. Filler (materials) - Wikipedia

   en.wikipedia.org/wiki/Filler_(materials)

   By using plastic filler, manufacturers can save production costs as well as raw materials. Undeniably the importance of filler masterbatch in improving the physical properties of plastics, especially minimizing cost and production efficiency. With the advantage of price and stability, plastic filler supports the production of: Blow molding

6. Plasticizer - Wikipedia

   en.wikipedia.org/wiki/Plasticizer

   PVC, used extensively in sewage pipes, is only useful because of plasticizers. [1]A plasticizer (UK: plasticiser) is a substance that is added to a material to make it softer and more flexible, to increase its plasticity, to decrease its viscosity, and/or to decrease friction during its handling in manufacture.

7. Descaling agent - Wikipedia

   en.wikipedia.org/wiki/Descaling_agent

   Limescale build-up inside a pipe reduces both liquid flow and thermal conduction from the pipe, so will reduce thermal efficiency when used as a heat exchanger.. A descaling agent or chemical descaler is a liquid chemical substance used to remove limescale from metal surfaces in contact with hot water, such as in boilers, water heaters, and kettles.

8. Fibre-reinforced plastic - Wikipedia

   en.wikipedia.org/wiki/Fibre-reinforced_plastic

   A suitable resin for combining the "fibreglas" with a plastic to produce a composite material, was developed in 1936 by du Pont. The first ancestor of modern polyester resins is Cyanamid's resin of 1942. Peroxide curing systems were used by then. [6] With the combination of fibreglas and resin the gas content of the material was replaced by ...

9. Polyvinyl chloride - Wikipedia

   en.wikipedia.org/wiki/Polyvinyl_chloride

   [37] [38] Buried PVC pipes in both water and sanitary sewer applications that are 100 mm (4 in) in diameter and larger are typically joined by means of a gasket-sealed joint. The most common type of gasket utilized in North America is a metal-reinforced elastomer, commonly referred to as a Rieber sealing system.