But the reduced moisture nsitivity is accompanied by lower ength, lower stiffness, lower use temperres, and higher cost. Nylons 11 and 12 have lower moisture sorption combined with superior resisce to fuels, hydraulic oils, and most automotive fluids. These two polyaraides are often combined with plasticizers to generate a flexible, tough material suitable for tubing extrusion. Semicrystalline polymers maintain useful properties above the glass transition in contrast to amorphous polymers which transform into a viscous mass. Nylon resin is available in a wide range of reinforcement levels, filler types, toughening agents, stabilizers and flame-retardant additives.
Nylon is available in several physical forms.
Nylon 6 and certain block copolymers can be cast as monomer into large shapes that polymerize into solids at room temperature. Parts several inches thick and weighing several hundred pounds can be cast. Axially symmetric shapes can be extruded. Nylon rod, and plate and tubular bar are available as stock shapes. Tubing and profile extrusions are available as custom shapes.