ABS has poor chemical resistance. These alloys offer improved strengths over ABS at a lower cost than Polycarbonate. Exceptional low temperature Impact Strength. Flame retardant grades are available. Due to the world shortage of polycarbonate production capacity, lead times for these materials are long, and availability is limited.
Acetal polymers are semi-crystalline.
They offer excellent inherent lubricity, fatigue resistance, and chemical resistance. Acetals suffer from outgassing problems at elevated temperatures, and are brittle at low temperatures. Glass filled, and added lubrication grades are available, flame retardant grades are not. Acrylic Acrylics are amorphous polymers with excellent clarity. They are widely used in optical applications.