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  2. Polyolefin - Wikipedia

    en.wikipedia.org/wiki/Polyolefin

    Elastolefin is a fiber used in fabrics. [16] IKEA's Better Shelter uses structural panels made out of polyolefin foam, stating, "They are tough and durable.". [17] Piping systems for the conveyance of water, chemicals or gases are commonly produced in Polypropylene, and to a much greater extent Polyethylene. Piping systems in high-density ...

  3. Stain removal - Wikipedia

    en.wikipedia.org/wiki/Stain_removal

    This is the most common way of treating non-washable fabrics. The front of the fabric is sponged with a sponge that is soaked in the solvent being used. The rear of the fabric should be backed up with a clean, absorbent, material. The stain is rubbed with the sponge radially, from the centre of the stain towards its edge.

  4. Conservation and restoration of ceramic objects - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    Damage can occur when ceramics are exposed to freezing temperatures and frost. The problem occurs when ice crystals form inside of the pores of the ceramic piece. The frost inside of the pores will exert pressure onto the fabric of the pottery and cause the material to crack and break. [4]: p.24

  5. Acetone - Wikipedia

    en.wikipedia.org/wiki/Acetone

    Acetone (2-propanone or dimethyl ketone) is an organic compound with the formula (CH 3) 2 CO. [22] It is the simplest and smallest ketone (>C=O).It is a colorless, highly volatile, and flammable liquid with a characteristic pungent odour, very reminiscent of the smell of pear drops.

  6. Crazing - Wikipedia

    en.wikipedia.org/wiki/Crazing

    However, while plastic deformation essentially occurs at constant volume, crazing is a cavitation process that takes place with an increase in volume. The initiation of crazing normally requires the presence of a dilative component of the stress tensor and can be inhibited by applying hydrostatic pressure.

  7. Propylene - Wikipedia

    en.wikipedia.org/wiki/Propylene

    Polypropylene manufacturers consume nearly two thirds of global production. [17] Polypropylene end uses include films, fibers, containers, packaging, and caps and closures. Propene is also used for the production of chemicals such as propylene oxide, acrylonitrile, cumene, butyraldehyde, and acrylic acid. In the year 2013 about 85 million ...

  8. Composite repair - Wikipedia

    en.wikipedia.org/wiki/Composite_repair

    Other common damage types include heat damage and bolt hole damage. The heat damage is caused by the exposure at high temperature which causes a local fracture with separation of surface plies. The bolt hole damage is cause by the bearing stresses at the contact surfaces of the composite structure with a bolt or rivet used for joining purposes.

  9. Bisphenol A - Wikipedia

    en.wikipedia.org/wiki/Bisphenol_A

    Bisphenol A (BPA) is a chemical compound primarily used in the manufacturing of various plastics.It is a colourless solid which is soluble in most common organic solvents, but has very poor solubility in water.