Chapter 39 covers plastics and articles thereof, including polymers in primary forms, waste and scrap, semi-manufactures and finished products. This chapter is divided into headings by polymer type, such as polyethylene, polypropylene, polystyrene, etc. Primary forms refer to liquid, paste, block, powder and other unprocessed forms, including resins, pellets, etc. This chapter does not include rubber, chemical fibers, etc. Heading 3902 covers polymers of olefins in primary forms, including polypropylene, polyisobutylene, propylene copolymers, etc. Among these, propylene copolymers refer to copolymers of propylene with other olefins (such as ethylene), where the propylene monomer unit content is usually greater than that of other monomers. This heading is further subdivided by specific type, such as 3902.10 polypropylene, 3902.30 propylene copolymers, etc. First 2 digits 39: Chapter 39 plastics and articles thereof. Digits 3-4 02: Heading 3902, polymers of olefins in primary forms. Digits 5-6 30: Subheading 3902.30, propylene copolymers. This subheading is further divided into 3902.30.10 propylene copolymers in primary forms (by specific specifications), etc. Code 390230 refers to propylene copolymers in primary forms, excluding polypropylene homopolymer (3902.10) and other olefin copolymers (3902.40, etc.). This product is a copolymer of propylene with other olefins, and is in primary forms, so it is classified under 3902.30. If it were polypropylene homopolymer, it would be classified under 3902.10; if it were other olefin copolymers such as ethylene-propylene copolymer but propylene is not the predominant monomer, it might be classified under 3901.40, etc. The key difference lies in the monomer unit ratio and copolymer type.

Product Name: The specific name of the declared commodity, such as "propylene copolymer", "propylene-ethylene copolymer", etc., which must be consistent with the contract and invoice. Appearance: Describe the specific form of the primary shape, such as granules, powder, liquid, block, etc., and indicate the color. Composition and Content: List the name and content percentage of each monomer unit, such as propylene 95%, ethylene 5%, which must accurately reflect the copolymer composition. Types and Proportions of Monomer Units: Clearly specify the main monomer units and their proportions, such as propylene monomer unit having the highest proportion, and indicate other monomer units. Grade: Fill in the grade or model provided by the manufacturer to facilitate identification of the specific product. Use: Explain the main use of the copolymer, such as injection molding, film, fiber, etc. Brand: Fill in the product brand; if there is no brand, fill in "None". Manufacturer: Fill in the name of the manufacturing enterprise, which must be consistent with the invoice and contract. Customs declaration example: Product Name: Propylene copolymer Appearance: White granules Composition and Content: Propylene 95%, Ethylene 5% Types and Proportions of Monomer Units: Propylene monomer unit 95%, Ethylene monomer unit 5% Grade: K8003 Use: Used for injection molding of automotive parts Brand: None Manufacturer: XX Petrochemical Company HS Code: 390230 Specification: 25kg/bag Confusing propylene copolymer with polypropylene homopolymer, mistakenly classified under 390210. Inaccurate declaration of composition and content, failing to provide monomer unit ratios, leading to classification disputes. Appearance description is not specific, such as only writing "granules", without specifying color and shape.

The core basis for classification is: 1. The product is in primary forms; 2. It is an olefin polymer; 3. It is a copolymer of propylene with other olefins, and the propylene monomer unit content is the highest. According to the Import and Export Tariff and its notes, 3902.30 specifically refers to propylene copolymers, which must meet the definition of a copolymer, i.e., the monomer units are not simply mixed, and propylene is the main monomer. If the propylene content is lower than other monomers, it may be classified under other headings. 390210 Polypropylene in primary forms: 390210 is polypropylene homopolymer, i.e., propylene monomer unit content ≥95%; while 390230 is propylene copolymer, with propylene monomer unit content usually <95% but higher than other monomers. 390140 Ethylene-propylene copolymer in primary forms: 390140 is ethylene-propylene copolymer, in which the ethylene monomer unit content is greater than propylene; while in 390230, the propylene monomer unit content is the highest. 390190 Other ethylene polymers in primary forms: 390190 is copolymers of ethylene with other monomers, with ethylene as the main monomer; while 390230 is propylene copolymer, with propylene as the main monomer. 390290 Other olefin polymers in primary forms: 390290 is olefin polymers not elsewhere specified, such as polyisobutylene, etc.; while 390230 specifically refers to propylene copolymers. 390430 Vinyl chloride-vinyl acetate copolymer in primary forms: 390430 is vinyl chloride copolymer, belonging to a different polymer category; while 390230 is propylene copolymer. Is it in primary forms? Is it an olefin polymer? Is it a copolymer of propylene with other olefins? Is the propylene monomer unit the main component? Is it confused with polypropylene homopolymer or ethylene copolymer?

How to determine whether a propylene copolymer should be classified under 390230? First confirm that the product is in primary forms and is an olefin polymer. Then analyze the monomer unit composition. If the propylene monomer unit content is the highest and it is copolymerized with other olefins, classify under 390230. If the propylene content is ≥95%, it may be a homopolymer classified under 390210; if the ethylene content is higher, classify under 390140. How should the composition and content be filled in during declaration? The name and percentage of each monomer unit should be accurately filled in, such as propylene 95%, ethylene 5%. This should be based on the test report or technical specification provided by the manufacturer to ensure the data is authentic. If it cannot be determined, the supplier should be required to provide a composition analysis. What is the difference in classification between propylene copolymer and polypropylene homopolymer? Polypropylene homopolymer is polymerized solely from propylene monomer, with a propylene unit content ≥95%, classified under 390210; while propylene copolymer is polymerized from propylene with at least one other olefin, with a propylene unit content usually <95% but higher than other monomers, classified under 390230. The two belong to different subheadings in the tariff. If the propylene content in a propylene copolymer is 90% and the ethylene content is 10%, which code should it be classified under? With a propylene content of 90% and propylene being the main monomer, it meets the definition of propylene copolymer under 390230 and should be classified under 390230. However, note that if the ethylene content exceeds propylene, it should be classified under 390140. Does 390230 include propylene terpolymers? Yes. Propylene terpolymers such as propylene-ethylene-butene copolymer, as long as the propylene monomer unit is the main component, are still classified under 390230. However, the types and proportions of each monomer unit must be clearly stated during declaration. How to inquire about the import tax rate for 390230? The latest tax rate can be obtained through the official website of the General Administration of Customs of China, tariff inquiry platforms, or by consulting a customs broker. The tax rate may vary depending on trade agreements, country of origin, etc., and it is recommended to rely on the actual customs assessment. What should be noted in the appearance description during declaration? The appearance should specifically describe the form (such as granules, powder, liquid) and color. For example, "white granules" is more accurate than "granules". If it is a modified material, it is also necessary to indicate whether additives have been added. If the product is waste and scrap of propylene copolymer, should it be classified under 390230? No. 390230 only applies to propylene copolymers in primary forms. Waste and scrap should be classified under 3915 (plastic waste and scrap). If it is a semi-manufacture or finished product, it should be classified under other corresponding headings.