Tariff classification of nylon monomer castings turns on whether polymerisation during manufacture makes them plastic goods.

Nylon monomer castings made from caprolactum were treated as non-plastic goods for tariff purposes because caprolactum is a monomer and not a plastic material, and polymerisation occurred only during manufacture after pouring into moulds. The Tribunal followed Gujarat and Rajasthan High Court interpretations that Item 15A(2) covers articles made from plastic raw material, not goods produced from non-plastic material that becomes plastic in the course of manufacture. As no other specific tariff entry applied, the residuary Item 68 governed classification. The stated consequence was that duty demand, confiscation and penalties based on Item 15A(2) could not be sustained.

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Issues: Whether Nylon Monomer Castings manufactured from caprolactum were classifiable under Item 15A(2) of the Central Excise Tariff as articles made of plastic materials, or under the residuary Item 68.

Analysis: The agreed facts showed that caprolactum was a monomer and not a plastic material, and that polymerisation took place only during the manufacturing process after the molten mass was poured into moulds. The deciding factor was whether Item 15A(2) covered articles made from non-plastic raw material which became plastic only during manufacture. The Tribunal relied on the interpretation already adopted by the Gujarat and Rajasthan High Courts, which held that Item 15A(2) applied only where plastic material was used as raw material and did not extend to goods manufactured from non-plastic material undergoing polymerisation in the course of production. Since no contrary binding view was shown, and the goods were not covered by any other specific tariff entry, the residuary entry applied.

Conclusion: Nylon Monomer Castings manufactured from caprolactum did not fall under Item 15A(2) and were classifiable under Item 68 with effect from 1-3-1975.

Final Conclusion: The duty demand, confiscation and penalties based on classification under Item 15A(2) could not stand, and the appeal succeeded on the substantive classification issue.

Ratio Decidendi: Where the raw material is a non-plastic monomer and plastic character arises only through polymerisation during manufacture, the finished goods are not articles made of plastic under Item 15A(2) and fall to be classified under the residuary entry.

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