Styrene polymers; in primary forms, n.e.c. in heading no. 3903

HS code 390390 covers a diverse range of styrene-based polymers that are used in a wide variety of applications across numerous industries. These thermoplastic materials are known for their excellent mechanical properties, chemical resistance, and versatility, making them essential components in the production of a wide range of consumer and industrial products. The global styrene polymers market is a significant contributor to the broader chemicals and plastics industry, with a growing demand driven by the increasing use of these materials in packaging, construction, automotive, and other key sectors.

Styrene polymers classified under HS code 390390 are typically produced through polymerization processes, such as bulk polymerization, suspension polymerization, or emulsion polymerization. These techniques involve the conversion of styrene monomers into long-chain polymer molecules, which are then further processed into various primary forms, including pellets, granules, and powders. The specific production methods used can vary depending on the desired properties and applications of the final styrene polymer product.

The main inputs required for the production of styrene polymers under HS code 390390 include styrene monomers, which are typically derived from the petrochemical industry. Additionally, various additives and catalysts may be used to modify the properties of the final polymer, such as impact modifiers, flame retardants, and stabilizers. The production process also requires specialized machinery and equipment, including polymerization reactors, extruders, and molding machines.

Styrene polymers classified under HS code 390390 are used in the manufacture of a wide range of products, including 392010 Plates, sheets, film, foil and strip, of plastics, non-cellular and not reinforced, laminated, supported or similarly combined with other materials, 392020 Plates, sheets, film, foil and strip, of plastics, cellular, 392030 Plates, sheets, film, foil and strip, of plastics, non-cellular and not reinforced, laminated, supported or similarly combined with other materials, and 392190 Other plates, sheets, film, foil and strip, of plastics, n.e.c. in heading no. 3921. These materials are also used in the production of 392510 Reservoirs, tanks, vats and similar containers, of plastics, with a capacity exceeding 300 l, 392520 Doors, windows and their frames and thresholds for doors, of plastics, and 392590 Builders' ware of plastics, n.e.c. in heading no. 3925.