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Particleboard with veneer. Particle board, also known as particleboard or chipboard, is an engineered wood product, belonging to the wood-based panels, manufactured from wood chips and a synthetic, mostly formaldehyde-based resin or other suitable binder, which is pressed under a hot press, batch- or continuous- type, and produced. [1]
Chipboard may refer to: Particle board, a type of engineered wood known as chipboard in some countries; See also. White-lined chipboard, a grade of paperboard;
Solid bleached board, made purely from bleached chemical pulp and usually has a mineral or synthetic pigment. Solid unbleached board, typically made of unbleached chemical pulp. White lined chipboard, typically made from layers of waste paper or recycled fibers, most often with two to three layers of coating on the top and one layer on the ...
[11] [12] [13] Considered by historians to be the world's first residential university [14] and among the greatest centres of learning in the ancient world, it was located near the city of Rajagriha (now Rajgir) and about 90 kilometres (56 mi) southeast of Pataliputra (now Patna) and operated from 427 until 1197 CE.
The Scottish-born Robert Gair invented the pre-cut cardboard or paperboard box in 1890 – flat pieces manufactured in bulk that folded into boxes. Gair's invention came about as a result of an accident: he was a Brooklyn printer and paper-bag maker during the 1870s, and one day, while he was printing an order of seed bags, a metal ruler ...
Oral diseases such as untreated tooth decay and gum disease affect 3.5 billion people in 2022
Oriented structural straw board is an engineered board made by splitting straw and formed by adding P-MDI adhesives and then hot compressing layers of straw in specific orientations. [7] Strand board can also be made from bagasse .
In 132, polymath Zhang Heng invented the seismoscope for detecting earthquakes, which was not invented anywhere else in the world until 1,100 years later. [25] Huan Tan's Xinlun is the earliest text to describe the trip hammer device powered by hydraulics (i.e., a waterwheel), which was used to pound and decorticate grain. [26]