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In general, acrylic sheet scratches easily and retains a static charge, which can be problematic when framing pastels or charcoals. Some manufacturers, add dyes to acrylic glass to filter the UV light transmittance, and its surface can also be treated with both anti-static and anti-reflective coatings .
The type of acrylic used in tanning beds is most often formulated from a special type of polymethyl methacrylate, a compound that allows the passage of ultraviolet rays. Sheets of PMMA are commonly used in the sign industry to make flat cut out letters in thicknesses typically varying from 3 to 25 millimeters (0.1 to 1.0 in).
Note that the sheet resistance quoted above depends on the thickness of the layer of material, and the value is the resistance of a square of the material for a current flowing from one edge to the opposite edge.
Cast acrylic has a better ability to be reworked hot and it is known for its superior surface finish and optical properties. Also cast acrylic is more scratch resistant than extruded acrylic. Cast acrylic is also preferred over extruded in applications that require machinings, such as turning on Engine Lathe or milling/drilling.
Edge-banding or edge tape can refer to the narrow strip of material being used as the veneer. [2] Edge banding is used to cover the exposed sides of materials such as plywood, particle board, or MDF. This increases durability and gives the appearance of a solid or more valuable material. Common substitutes for edge banding include face frames ...
Another commonly used shielding method, especially with electronic goods housed in plastic enclosures, is to coat the inside of the enclosure with a metallic ink or similar material. The ink consists of a carrier material loaded with a suitable metal, typically copper or nickel, in the form of very small particulates.
By the 1970s, the Occupational Safety and Hazard Administration (OSHA) was established and began issuing standard updates for fall protection in the construction industry. In 1994, OSHA also issued Subpart M Fall Protection Standard which required roof edge protection to be in place where employees were working six feet or more above a lower level.
Aramid fibre (e.g. Twaron) is used for flame-retardant clothing, cut-protection, and armour. Acrylic is a fibre used to imitate wools, [104] including cashmere, and is often used in replacement of them. Nylon is a fibre used to imitate silk; it is used in the production of pantyhose. Thicker nylon fibres are used in rope and outdoor clothing.