Acrylonitrile butadiene styrene (ABS) is a common thermoplastic polymer. Its glass transition temperature is approximately 105 °C (221 °F). ABS is amorphous and therefore has no true melting point.
ABS granules stands for Acrylo Nitrile Butadyne Styrene granules. Their chemical composition render them the physical properties like hardness, rigidity and the tendency to remain tough even at low temperatures. These ABS Granules consist of particles of a rubber like toughener suspended in a continuous phase of styrene acrylo nitrile (SAN) copolymer. In market, the various grades of these amorphous, medium-priced thermoplastics with different levels of impact strength, heat resistance, flame retardance and plat ability are easily available. Generally, most of the naturally occurring ABS Granules are translucent to opaque and they can be pigmented to almost any color. The various grades of granules are meant for injection molding, extrusion, blow molding, foam molding and thermoforming. These molding and extrusion grades provide surface finishes ranging from satin to high gloss. The surface roughness of thermoplastic parts is a very crucial aspect as it directly affects the optical behavior and the aesthethics of the plastic products. As per the requirement and the usage, the surface roughness of these granules varies from product to product. For instance, in several fibre products such as optical discs etc, the surface roughness are required to keep to the least possible level.