Custom Plastic transparent Acrylic CNC Machining Parts

acrylic, also known as PMMA or Plexiglas, from the English acrylic (acrylic plastic), the chemical name is polymethyl methacrylate. It is an important plastic polymer material developed earlier, with good transparency, chemical stability and weather resistance, easy to color, easy to process, beautiful appearance, has a wide range of applications in the construction industry. Plexiglass products can usually be divided into cast sheet, extruded sheet and molded plastic. People often say that the acrylic sheet is Polymeric Methyl Methacrylate (PMMA) sheet, which is made of "methyl methacrylate monomer Methyl Methacrylate (MMA)" polymerization. It is made by polymerizing "Methyl Methacrylate Monomer (MMA)" or by extruding acrylic pellets through an extruder. Previously known as Plexiglas. Acrylic is derived from the English acrylic, meaning PMMA sheet made from the organic compound MMA, which is as transparent and translucent as glass. Derived from all transparent plastics such as PS, PC, etc. or made of poor quality recycled MMA sheet are collectively referred to as plexiglass. In order to differentiate, the PMMA sheet made of high quality pure MMA is named acrylic sheet, so as to differentiate it from the general Plexiglas sheet.

Characteristics

1. Crystal-like transparency, light transmittance of more than 92%, soft light, visual clarity, with dye coloring acrylic and have a good color effect.

2. Acrylic sheet has excellent weather resistance, high surface hardness and surface gloss, and good high temperature performance.

3. Acrylic sheet has good processing performance, both thermoforming and mechanical processing can be used.

4. Transparent acrylic sheet has comparable light transmittance to glass, but only half the density of glass. In addition, it is not as fragile as glass, and even if it is damaged, it will not form sharp fragments like glass.

5. The wear resistance of acrylic sheet is close to aluminum, good stability, resistance to a variety of chemical corrosion.

6. Acrylic sheet has good printability and spraying, using the appropriate printing and spraying process, you can give acrylic products the ideal surface decorative effect.

7. Flame resistance: non-spontaneous combustion but flammable, not self-extinguishing.

Special Characteristics

1. Hardness

Hardness is one of the parameters that best reflects the production process and technology of cast acrylic sheet, and is an important part of quality control. Hardness can reflect the raw material PMMA purity, sheet weathering and high temperature resistance. Hardness directly affects whether the sheet will shrink and bend and deform, whether the surface will chafe when processing, etc.. Hardness is one of the hardness indicators to judge the quality of acrylic sheet.

2. Thickness (acrylic tolerance)

Acrylic sheet thickness there is an acrylic tolerance, so the control of acrylic tolerance is an important embodiment of quality management and production technology. Acrylic production have an international standard ISO7823

Tolerance requirements for casting plate: tolerance = ± (0.4 + 0.1 x thickness)

Extruded sheet tolerance requirements: tolerance = < 3 mm thickness: ± 10 % > 3 mm thickness: ± 5 %.

3.Transparency/Whiteness

Strict selection of raw materials, advanced formula follow-up and modern production processes ensure excellent transparency and pure whiteness of the sheets. Flame-polished and crystal clear.

PMMA is acrylic acid and its esters polymerization of polymers obtained collectively known as acrylic esters, the corresponding plastics collectively known as polyacrylic acid plastics, of which polymethyl methacrylate methyl ester is the most widely used. Polymethyl methacrylate abbreviation code for PMMA, commonly known as Plexiglas, is by far the most excellent quality of synthetic transparent materials.

PMMA is lightweight, inexpensive and easy to mold. Its molding methods are casting, injection molding, machining, thermoforming and so on. Especially injection molding, can be mass production, simple process, low cost. Therefore, its application is becoming more and more extensive, it is widely used in instrument parts, automobile lamps, optical lenses, transparent pipes and so on.

Advantages

Acrylic is the best new material to manufacture sanitary ware after ceramics. Compared with traditional ceramic materials, acrylic in addition to the unparalleled high brightness, there are the following advantages: good toughness, not easy to break; strong repair, as long as the soft foam dipped in toothpaste can be wiped with a new sanitary ware; soft texture, there is no cold and harsh feeling in the winter; brightly colored, to meet the pursuit of personality of different tastes. With acrylic production basin, bathtub, toilet, not only exquisite style, durable, and has the role of environmental protection, its radiation and the human body's own bone radiation level is comparable. Acrylic sanitary ware first appeared in the United States, has occupied more than 70% of the international market.

Disadvantages

Due to the difficulty and high cost of acrylic production, so there are many low-quality and inexpensive substitutes on the market. These substitutes are also known as "acrylic", in fact, is an ordinary organic board or composite board (also known as sandwich board). Ordinary organic board with ordinary plexiglass cracked material plus pigment casting and become, low surface hardness, easy to fade, with fine sand sanding after polishing effect is poor. Composite panels only a very thin layer of acrylic surface, the center is ABS plastic, the use of thermal expansion and contraction is easy to delamination. True and false acrylic, can be identified from the plate section of the subtle color difference and polishing effect to identify.

Acrylic has a wide range of applications, can be used for test racks, patch tray.

Application areas

1. Architectural applications: windows, soundproof doors and windows, light covers, telephone booths, etc.

2. Advertising applications: light boxes, signboards, signs, display racks, etc.

3. Transportation applications: doors and windows of trains, automobiles and other vehicles, etc.

4. Medical applications: baby care boxes, various surgical medical instruments Civilian products: sanitary facilities, handicrafts, cosmetics, stents, aquariums, etc.

5. Industrial applications: instrument surface plates and covers, etc.

6. Lighting applications: fluorescent lamps, chandeliers, street lampshades, etc.

Application areas: hotels, shopping malls, office buildings, clubs, villas, museums, medical care, education, restaurants, exhibitions and displays and so on.ceiling, integrated ceiling, partition, screen, sliding door, transparent wall, hotel furniture, office furniture, bar, lighting, chandelier, signs, signage, flooring, landscape and so on.