Nylon: The “workhorse” of mechanical plastics...
Nylon is one of the most common and most used due to the variety of shapes, sizes and fillers available. Some of its key properties are:
• Very good wear and abrasion resistance
• Excellent Impact resistance
• FDA/USDA/NSF compliant
• Outstanding chemical resistance
• Continuous use temperature of 210 degrees F
Nylon comes in 2 basic forms; Extruded and Cast. The properties are similar for both methods for manufacturing. The main differences are the sizes available, and specific grades and fillers available in each.
Extruded Nylon is most often a 6/6 nylon. It is available in very thin sheets and small diameters, as well as larger sizes. It is a natural color and is also available in black. Some common variations are:
Molybdenum Disulphide filled (nylon MD) increases the surface hardness of nylon, thus increasing it’s sliding ability. Greater wear resistance and lubricity are achieved. MD is noted by it’s gray– black color which is often seen as swirls.
Glass filled Nylon enhances stiffness, strength, and dimensional stability. Glass content can range from 10% to 30%. The addition of glass makes it abrasive and not well-suited for sliding applications.
Low-Moisture–Nylon 612 is the most common. Absorbs less moisture than 6/6, thus offering better dimensional stability in a wet or humid application.
ST801– Super tough nylon has better impact strength over standard nylon.
Cast Nylon– is a type 6 nylon. It is available in very thick sheets, large diameter rod, and tubular bar. It is a natural color and is available in blue.
Oil–Impregnated– this has a much lower coefficient of friction than regular cast nylon. This makes it ideal for bearings, bushings, and rollers. The oil becomes an integral part of the nylon during the manufacturing process, and will never drain, spill, or dry out. The increased lubricity also enhances machinabilty.