Propertymoisture-absorptioncharacteristicsSince all nylons absorb some moisture fromenvironmental humidity, ranging from 8 - 1o%for PA6 and PA66 to 2 - 3% forPA11 and PA12at saturation. Mechanical properties areaffected by moisture, with toughness improvingwith the absorption of moisture whereasmodulus is reduced. Hence moisture-absorptionproperties do not have to limit the use of nylons
Property moisture-absorption characteristics Since all nylons absorb some moisture from environmental humidity, ranging from 8 - 10% for PA6 and PA66 to 2 - 3% for PA11 and PA12 at saturation. Mechanical properties are affected by moisture, with toughness improving with the absorption of moisture whereas modulus is reduced. Hence moisture-absorption properties do not have to limit the use of nylons
TypeSome common commercially available nylons are6/6, 6, 6/10, 8, 11, and 12. PA11 is more flexiblethan PA66. Grades 6 and 6/6 are the strongeststructurallyi grades 6/10 and 11 have the lowestmoisture absorption, best electrical properties, andbest dimensional stability; and grades 6, 6/6, and6/10 are the most flexible. Grades 6, 6/6, and 8 areheat-sealable, with nylon 8 being capable of cross-linking. Another grade, nylon 12, offers advantagessimilar to those of grades 6/10 and 11, but lowercost possibilities due to being more easily andeconomically processed. Also a high-temperaturetype of nylon exists
Type Some common commercially available nylons are 6/6, 6, 6/10, 8, 11, and 12. PA11 is more flexible than PA66. Grades 6 and 6/6 are the strongest structurally; grades 6/10 and 11 have the lowest moisture absorption, best electrical properties, and best dimensional stability; and grades 6, 6/6, and 6/10 are the most flexible. Grades 6, 6/6, and 8 are heat-sealable, with nylon 8 being capable of crosslinking. Another grade, nylon 12, offers advantages similar to those of grades 6/10 and 11, but lower cost possibilities due to being more easily and economically processed. Also a high-temperature type of nylon exists
TypeNylon 6Nylon 6 is used mainly as a molding andextrusion compound. It is very useful alsowhen as fabric, of as high pressure molds.Nylon 6 is one of the most valuable polyamidesthat are used today because of their cost andstrength after cold rolling.Melting Temperature: 223CTensileStrength= 41-166MpaImpact resistance = 0.3 - 1.2 J/cm
Type Nylon 6 Nylon 6 is used mainly as a molding and extrusion compound. It is very useful also when as fabric, of as high pressure molds. Nylon 6 is one of the most valuable polyamides that are used today because of their cost and strength after cold rolling. Melting Temperature: 223C Tensile Strength= 41 - 166 Mpa Impact resistance = 0.3 - 1.2 J/cm
TypeNylon66Nylon 6,6 is a very important polyamide in usetoday. Because of it can have a very high elasticmodulus, on the other side of toughness, a veryhigh ductility. Nylon 6,6, because it is anexcellent molding compound, is used for manythings including, fabric for clothing, shockabsorbers at high temperatures.Glass Transition Temperature = 5oCMelting Temperature: 255-265CTensileStrength=95MpaImpact resistance = .3-.5 J/cm
Type Nylon 66 Nylon 6,6 is a very important polyamide in use today. Because of it can have a very high elastic modulus, on the other side of toughness, a very high ductility. Nylon 6,6, because it is an excellent molding compound, is used for many things including, fabric for clothing, shock absorbers at high temperatures. Glass Transition Temperature = 50C Melting Temperature: 255-265C Tensile Strength = 95 Mpa Impact resistance = .3-.5 J/cm
TypeStrength and rigidity of these materials can bedramatically enhanced by the addition of glass orcarbon fibre reinforcement: the leyel of saturationwater absorption is also reduced. However, thedesigner needs to be aware of the anisotropicproperties that can result in moulding due to the flowand alignment of the reinforcing phase that occursduring moulding.Glass reinforced polyamides are the material ofchoice for applications such as power tool housings
Type ◼ Strength and rigidity of these materials can be dramatically enhanced by the addition of glass or carbon fibre reinforcement; the level of saturation water absorption is also reduced. However, the designer needs to be aware of the anisotropic properties that can result in moulding due to the flow and alignment of the reinforcing phase that occurs during moulding. ◼ Glass reinforced polyamides are the material of choice for applications such as power tool housings