Acrylics sheet

Plexiglas Acrylic Sheet, PE-783a, Rohm and Haas Co., Philadelphia, Pa. 

Cyanohydrins are used primarily as intermediates in the production of other chemicals. Manufacture of methyl methacrylate, used to make acrylic mol ding resins and clear sheet, eg, Plexiglas acrylic sheet, from acetone cyanohydrin is the most economically important cyanohydrin process (see Methacrylic polymers). Cyanohydrins are also used as solvents in appHcations including fiber-spinning and metals refining. Cyanohydrins and derivatives reportedly act as antiknock agents in fuel oil and motor fuels and serve as electrolytes in electrolytic capacitors. 

Panel numbering on acrylic sheet or aluminium anodized plates may be fixed on the front and the rear of each vertical panel for quick identification of each panel section (Figure 13.1). 

Deformation of low molecular weight polymer or polymer precursor such as in the casting of acrylic sheet and preparation of glass-reinforced laminates. 

Figure 15.6. Effect of temperature on tensile strength of acrylic sheet (Perspex) at constant rate of strain (0.44% per second). (Reproduced by permission of ICl)...

The methacrylic polymer remains a useful glazing material. In aircraft applications it is used extensively on aircraft which fly at speeds less than Mach 1.0. They form the familar bubble body of many helicopters. On land, acrylic sheet is useful for coach roof lights, motor cycle windscreens and in do-it yourself cabins for tractors and earth-moving equipment. Injection mouldings are frequently used for plaques on the centre of steering wheels and on some fascia panelling. 

Transparent guards for foodstuffs, machines and even baby incubators may be fabricated simply from acrylic sheet. It should, however, be pointed out that due to rather rapid surface deterioration and the lack of sparkle the material is not ideally suited as a cover for displayed goods. 

Acrylic sheet is also employed for many other diverse applications, including baths and wash-basins, which have considerable design versatility, are available in a wide range of colours, and are cheaper and much lighter than similar products from other materials. 

If the surface of an acrylic sheet, rod or tube is roughened or carved, less light is internally reflected and the material is often rather brighter at these non-polished surfaces. The use of this effect enables highly attractive carvings to be produced. Similarly, lettering cut into sheet, particularly fluorescent sheet, becomes Tit-up and this effect is useful in display signs. 

Such lenses may be made by machining from rod. More recently processes have been developed where the monomers are cast polymerised in tiny plastics moulds whose cavity corresponds to the dimensions of the lens and using procedures very reminiscent of those described for the manufacture of acrylic sheet (see Section 15.2.2). 

A number of injection mouldings have been prepared from CAB with about 19% combined acetic acid and 44% combined butyric acid. Their principal end products have been for tabulator keys, automobile parts, toys and tool handles. In the United States CAB has been used for telephone housings. Extruded CAB piping has been extensively used in America for conveying water, oil and natural gas, while CAB sheet has been able to offer some competition to acrylic sheet for outdoor display signs. 

Example 2.19 During tensile tests on 4 mm thick acrylic sheets of the type shown in Fig. 2.63(a), the force-displacement characteristics shown in Fig. 2.64(a) were recorded when the crack lengths were as indicated. If the sheet containing a 12 mm long crack fractured at a force of 330 N, determine the fracture toughness of the acrylic and calculate the applied force necessary to O acture the sheets containing the other crack sizes. 

Acrylic Sheet (e.g. Perspex) Acrylonitrile Butadiene Styrene Resins (1) Nylon 66 Fibre (m) Nylon 66 Plastics (m) PCTFE PTFE (n) PVDF (y) Rigid Unplasticised PVC Plasticised PVC ... 

Material Safety Data Sheet Plexiglas Acrylic Sheet. Atofina, Inc., http //www.atofinachemicals.com/msds/421.pdf... 

Thermofor catalytic cracker (TCC), 11 819 Thermoformed acrylic sheet, 20 116 Thermoformed food packaging, 18 48-49 Thermoforming, 10 179, 19 555 ABS, 1 427-428... 

Glazing, domes, skylights... consume 20% of all polycarbonate. Acrylic sheets account for 66% of total acrylics. 

Uses. Production of polymethyl methacrylate polymers for use in acrylic sheet and acrylic molding, extrusion powder, acrylic surface coatings, printing inks, and adhesives used in surgery and dentistry... 

Lumasite Acrylic sheet American Acrylic Corp. 

Micro-Matte Extruded acrylic sheet with Extrudaline... 

Most commercial acrylic sheets have an index of refraction of about 1.5 and a total luminous transmittance of about 90%. PC sheet has an index of refraction of about 1.6 and a total luminous transmittance of about 88%, Polysulfone sheet (IJdel) has an index of refraction of about 1.63 and a total luminous transparency of 80%. 

Sanitary ware, including tubs, showers, combined units, basins, and toilet tank, may be made of thermoformed ABS or acrylic sheet, molded glass-fiber-reinforced polyester, or cast acrylic resins. The glass-polyester type dominates the tub/shower market. It is possible to install the units as a two-component system, assembled in place. Gel coats may be of thermoformed decorative acrylic skins. To reduce the smoke generated by fire, methyl... 

Thermoformed acrylic sheet is displacing gel coats in some bathtub applications spas have converted almost exclusively to formed acrylic sheet reinforced with glass-reinforced polyester laminations due to higher temperatures and higher structural requirements. 

Methyl methacrylate, accounting for 4% of methanol consumption, is produced by the cyanohydrin process utilizing methanol. Methyl methacrylate is used to produce acrylic sheet, surface coating resin, and molding and extrusion powder. Also, there exist minor miscellaneous uses such as modification of acrylic fiber and polyester resin. 

Acetone Cyanohydrin (ACH). ACH is made when HCN reacts with acetone. It is a key ingredient in many methyl methacrylate (MMA) plants. MMA is used to make acrylic sheeting and related products. 

Methyl Methacrylate Acrylic Sheet Products Acrylic Resins Composites Building Materials... 

---