Silicones; in primary forms

HS code 391000 covers the classification of silicones in their primary forms. Silicones are a class of synthetic polymers that have a wide range of industrial and commercial applications. They are valued for their unique properties, such as heat resistance, water repellency, and chemical stability. The silicone industry plays a crucial role in various sectors, including construction, automotive, electronics, and personal care, contributing significantly to the global economy.

Silicones are typically produced through a process called polymerization, where small silicone molecules are linked together to form larger, more complex structures. The main steps involved in silicone production include the synthesis of the basic silicone monomer, the polymerization of the monomer into silicone polymers, and the further processing and formulation of the silicone materials into their final primary forms.

The primary inputs required for the silicone industry include silicon-based raw materials, such as silicon dioxide (sand), methyl chloride, and various catalysts. Additionally, the industry relies on specialized equipment and machinery for the polymerization and processing of silicone materials. Energy sources, such as electricity and natural gas, are also essential for the manufacturing process.

The primary outputs of the silicone industry covered under HS code 391000 include various forms of silicone polymers, such as silicone resins, silicone fluids, and silicone elastomers. These silicone materials are then further processed and incorporated into a wide range of products, including 401700 Rubber, vulcanized, other than hard rubber, in primary forms or in plates, sheets or strip, 392010 Plates, sheets, film, foil and strip, of plastics, non-cellular and not reinforced, laminated, supported or similarly combined with other materials, and 852990 Parts suitable for use solely or principally with the apparatus of headings 8525 to 8528, n.e.s., among others.