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Tyvek's properties—such as being difficult to tear but easily cut, and waterproof against liquids while allowing water vapor to penetrate—have led to it being used in a variety of applications. Tyvek is often used as housewrap, a synthetic material used to protect buildings during construction, or as personal protective equipment (PPE). [1]
Verner Eisby, a Danish engineer, the inventor of corona treatment. Corona treatment (sometimes referred to as air plasma) is a surface modification technique that uses a low temperature corona discharge plasma to impart changes in the properties of a surface.
A building wrapped with Tyvek-brand housewrap during construction. Housewrap (or house wrap), also known by the genericized trademark homewrap (or home wrap), generally denotes a modern synthetic material used to protect buildings.
Plague doctor wearing a plague doctor costume A radiographer wearing an early hazmat suit in 1918 during World War I.. An early primitive form of the hazmat suit arose during bubonic plague epidemics, when European plague doctors of the 16th and 17th centuries wore distinctive costumes consisting of bird-like beak masks and large overcoats while treating victims of the bubonic plague. [1]
Tempered glass can be made from annealed glass via a thermal tempering process. The glass is placed onto a roller table, taking it through a furnace that heats it well above its transition temperature of 564 °C (1,047 °F) to around 620 °C (1,148 °F). The glass is then rapidly cooled with forced air drafts while the inner portion remains ...
Inside a steel building, water vapor will condense whenever it comes into contact with a surface that is below the dew point temperature. Visible condensation on windowpanes and purlins that results in dripping can be somewhat mitigated with ventilation; however insulation is the preferred method of condensation prevention.
UVA rays are what can lead to premature aging and can be a cause of skin cancer. “Glass 100% blocks UVB rays — which is what you need to make vitamin D — while allowing in UVA rays,” Dr ...
Air barriers control air leakage into and out of the building envelope.Air barrier products may take several forms: Mechanically-attached membranes, also known as housewraps, usually a polyethylene-fiber or spun-bonded polyolefin, such as Tyvek is a generally accepted moisture barrier and an air barrier (ASTM E2178).