Rubber; synthetic, isobutene-isoprene (butyl) rubber (IIR), in primary forms or in plates, sheets or strip

HS v2022 Code: 400231

About rubber; synthetic, isobutene-isoprene (butyl) rubber (iir), in primary forms or in plates, sheets or strip

HS code 400231 covers the classification of synthetic isobutene-isoprene (butyl) rubber, a versatile and widely used material in various industries. Butyl rubber is known for its exceptional air-tightness, resistance to weathering, and low permeability to gases, making it a critical component in numerous applications such as tire inner liners, pharmaceutical stoppers, and industrial gaskets. As a key player in the broader 400000 Rubber and articles thereof industry, the production and trade of butyl rubber holds significant economic importance globally.

Production process

The production of synthetic isobutene-isoprene (butyl) rubber involves a complex polymerization process. The primary raw material, isobutylene, is combined with small amounts of isoprene and subjected to cationic polymerization under controlled temperature and pressure conditions. This process results in the formation of the characteristic butyl rubber polymer, which is then further processed into various primary forms, such as sheets, plates, or strips, to meet the specific needs of downstream industries.

Production inputs

The main inputs required for the production of HS code 400231 butyl rubber include the raw materials isobutylene and isoprene, as well as specialized machinery and equipment for the polymerization and processing stages. Additionally, energy sources, such as electricity or natural gas, are necessary to power the production facilities. The availability and cost-effectiveness of these key inputs can significantly impact the overall competitiveness of the butyl rubber industry.

Production outputs

The primary output of HS code 400231 is synthetic isobutene-isoprene (butyl) rubber in various forms, including sheets, plates, and strips. This material is widely used in the manufacture of 401110 New pneumatic tyres, of rubber under HS code 401110, as well as in the production of 401120 New pneumatic tyres, of rubber under HS code 401120. Butyl rubber is also a crucial component in the production of 401699 Other articles of vulcanized rubber other than hard rubber under HS code 401699, which encompasses a broad range of rubber-based products used in diverse industries.

Revisions to 400231

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 400231. The most recent 1 version of this code (400231) is in the HS v2022 system (this version):

This page shows the most recent version of code 400231.

Family tree for rubber; synthetic, isobutene-isoprene (butyl) rubber (iir), in primary forms or in plates, sheets or strip

    graph LR
    A["<a href='/classifications/hs/v2022/40'>40: Rubber and articles thereof</a>"]
A --> B["<a href='/classifications/hs/v2022/4002'>4002: Synthetic rubber and factice derived from oils, in primary forms or in plates, sheets or strip; mixtures of heading no. 4001 and 4002, in primary forms or in plates, sheets or strip</a>"]
B --> C["<a href='/classifications/hs/v2022/400231'>400231: Rubber; synthetic, isobutene-isoprene (butyl) rubber (IIR), in primary forms or in plates, sheets or strip</a>"]

    B --> D["<a href='/classifications/hs/v2022/400211'>400211: Rubber; synthetic, styrene-butadiene rubber (SBR) and carboxylated styrene-butadiene rubber (XSBR) latex, in primary forms or in plates, sheets or strip</a>"]
B --> E["<a href='/classifications/hs/v2022/400219'>400219: Rubber; synthetic, styrene-butadiene rubber (SBR) and carboxylated styrene-butadiene rubber (XSBR), (other than latex), in primary forms or in plates, sheets or strip</a>"]
B --> F["<a href='/classifications/hs/v2022/400220'>400220: Rubber; synthetic, butadiene rubber (BR), in primary forms or in plates, sheets or strip</a>"]
B --> G["<a href='/classifications/hs/v2022/400239'>400239: Rubber; synthetic, halo-isobutene-isoprene rubber (CIIR or BIIR), in primary forms or in plates, sheets or strip</a>"]
B --> H["<a href='/classifications/hs/v2022/400241'>400241: Rubber; synthetic, chloroprene (chlorobutadiene) rubber (CR), latex, in primary forms or in plates, sheets or strip</a>"]
B --> I["<a href='/classifications/hs/v2022/400249'>400249: Rubber; synthetic, chloroprene (chlorobutadiene) rubber (CR), (other than latex), in primary forms or in plates, sheets or strip</a>"]
B --> J["<a href='/classifications/hs/v2022/400251'>400251: Rubber; synthetic, acrylonitrile-butadiene rubber (NBR), latex, in primary forms or in plates, sheets or strip</a>"]
B --> K["<a href='/classifications/hs/v2022/400259'>400259: Rubber; synthetic, acrylonitrile-butadiene rubber (NBR), (other than latex), in primary forms or in plates, sheets or strip</a>"]
B --> L["<a href='/classifications/hs/v2022/400260'>400260: Rubber; synthetic, isoprene rubber (IR), in primary forms or in plates, sheets or strip</a>"]
B --> M["<a href='/classifications/hs/v2022/400270'>400270: Rubber; synthetic, ethylene-propylene-non-conjugated diene rubber (EPDM), in primary forms or in plates, sheets or strip</a>"]
B --> N["<a href='/classifications/hs/v2022/400280'>400280: Rubber; mixtures of natural and synthetic rubbers of heading no. 4001 and 4002, in primary forms or in plates, sheets or strip</a>"]
B --> O["<a href='/classifications/hs/v2022/400291'>400291: Rubber; synthetic, n.e.c. in heading 4002, latex, in primary forms or in plates, sheets or strip</a>"]
B --> P["<a href='/classifications/hs/v2022/400299'>400299: Rubber; synthetic, n.e.c. in heading 4002, (other than latex), in primary forms or in plates, sheets or strip</a>"]

    

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class G level6
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class I level6
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class K level6
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class N level6
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