Styrene polymers; styrene-acrylonitrile (SAN) copolymers, in primary forms

HS code 390320 covers the production and trade of styrene polymers and styrene-acrylonitrile (SAN) copolymers in their primary forms. These materials are widely used in the manufacturing of a diverse range of consumer and industrial products, making them an essential component of the global economy. Styrene polymers and SAN copolymers are known for their versatility, durability, and cost-effectiveness, contributing to their widespread adoption across various industries.

The primary production techniques for styrene polymers and SAN copolymers involve polymerization processes. Styrene monomers are typically polymerized through processes like bulk polymerization, suspension polymerization, or emulsion polymerization to create polystyrene. SAN copolymers are produced by copolymerizing styrene and acrylonitrile monomers, often using similar polymerization methods. The resulting polymers are then extruded or molded into their primary forms, such as pellets, sheets, or other shapes, ready for further processing and manufacturing.

The main inputs required for the production of styrene polymers and SAN copolymers include styrene and acrylonitrile monomers, as well as various catalysts, initiators, and other additives used in the polymerization process. Additionally, specialized machinery, such as reactors, extruders, and molding equipment, are essential for the efficient production and shaping of these materials. Energy, in the form of heat and electricity, is also a significant input for the various stages of the manufacturing process.

The primary outputs of HS code 390320 are styrene polymers and SAN copolymers in their primary forms, such as pellets, sheets, or other shapes. These materials are then further processed and transformed into a wide range of end-products, including 392010 Plates, sheets, film, foil and strip, of plastics, non-cellular and not reinforced, laminated, supported or similarly combined with other materials, 392030 Plates, sheets, film, foil and strip, of plastics, cellular, 392190 Other plates, sheets, film, foil and strip, of plastics, non-cellular and not reinforced, laminated, supported or similarly combined with other materials, and various molded or extruded plastic parts and components used in the automotive, construction, packaging, and consumer goods industries.