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Concrete

Within engineering plastics can is also known by its acronym PMMA. Is obtained from the polymerization of methyl methacrylate and the most frequent presentation found in the plastic industry is in granular or sheet. The granules are in the process of injection or extrusion and thermoforming sheets or machining.

Compete in terms of applications to other plastics such as polycarbonate or polystyrene, but it stands out from other transparent plastics in terms of weather resistance, transparency and scratch resistance.

For these qualities is used in the automotive industry lighting, cosmetics, entertainment, construction and optics, among others. In the world of medicine is used polymethylmethacrylate resin for the manufacture of dental prostheses and bone powder as an additive in the formulation of many of the pills we take by mouth. In this case acts as a retardant to the action of the drug for it to be progressive. In

granules acrylic is a hygroscopic material, ie it tends to hold moisture to the medium in which it is, why it must be dried before processing.

PMMA applications are numerous, including signaling, signage or displays. The advantages of this material are many. Recently we found many designs, colors and finishes on the plates that open a world of possibilities for use in architecture and decoration.

Its properties include transparency

• about 93%. The most transparent plastics.
• High impact resistance is 10 to 20 times greater than that of glass.
• Weatherproof and UV, as there is no appreciable aging in 10 years of exterior exposure.
• Excellent thermal and acoustic insulation.
• Lightweight compared to glass, more or less half and is almost as dense as water. Easy
• combustion, does not turn off when removed from heat and gases have a fruity smell. Not produce any toxic gases on burning so we can consider it a very safe product.
• Very easy machining and molding. Can be machined
• cold but not bend. If we want to fold, we apply heat to a part or to the whole piece of PMMA
• methacrylate presents great resistance to attack by many compounds but is attacked by others, including: ethyl acetate, acetone, glacial acetic acid, sulfuric acid dichromate, amyl alcohol, benzene, butanol, dichloromethane, trichloromethane (chloroform), toluene.

Source: VICTOR RODRIGUEZ Caldevilla