The U.S. Department of Commerce has taken definitive action to address what it has determined to be unfair trade practices, issuing an antidumping duty order on polypropylene corrugated boxes imported from the Socialist Republic of Vietnam. Effective July 17, 2026, this order mandates the collection of duties on these products, a move that follows comprehensive investigations by both Commerce and the U.S. International Trade Commission. The decision underscores the federal government's commitment to enforcing trade laws designed to protect domestic industries from injurious foreign competition.
Background of the Investigation
This antidumping order stems from a lengthy investigative process. On May 20, 2026, Commerce published its affirmative final determination that polypropylene corrugated boxes from Vietnam were being sold in the United States at less than fair value. This finding was made in accordance with sections 735(d) and 777(i) of the Tariff Act of 1930, as amended. Following Commerce's determination, the U.S. International Trade Commission (ITC) played its crucial role. On July 6, 2026, the ITC notified Commerce of its final affirmative determination that a U.S. industry was materially injured by reason of these dumped imports from Vietnam. The ITC's finding satisfied the material injury requirement under section 735(b)(1)(A)(i) of the Act, paving the way for the formal imposition of duties.
Scope of the Order
The products subject to this antidumping duty order are broadly defined as polypropylene corrugated boxes. This includes boxes, bins, totes, or other load-bearing containers designed for holding goods. A key characteristic is that they are manufactured from corrugated polypropylene sheets, also known as polypropylene hollow core sheets, polypropylene fluted sheets, polypropylene twin wall sheets, or multi wall sheets. These sheets are specifically 'corrugated,' 'fluted,' or 'hollow core,' meaning they contain internal air channels or pockets that contribute to their lightweight nature while maintaining strength and durability. Typically, these boxes are made from a plastic resin comprising 50 percent or more polypropylene. The scope covers boxes irrespective of the specific blend of polypropylene homopolymer, copolymer, recycled or virgin polypropylene, or ancillary chemicals like electrostatic agents or flame retardants. They are formed by cutting corrugated polypropylene sheets to size, die-cutting them into specific shapes, and often scoring them to facilitate folding into box forms. They may also include a 'manufacturer's joint,' which is an attached portion of polypropylene corrugated sheet.
Assessment of Antidumping Duties
With the ITC's affirmative final injury determination now in place, Commerce is directing U.S. Customs and Border Protection (CBP) to assess antidumping duties on unliquidated entries of polypropylene corrugated boxes from Vietnam. These duties will be equal to the amount by which the normal value of the merchandise exceeds its export price or constructed export price. This assessment applies to relevant entries of subject merchandise entered or withdrawn from warehouse for consumption on or after December 31, 2025. This date corresponds to the publication of Commerce's Preliminary Determination in the investigation. However, there is a specific exception for entries occurring after the expiration of the provisional measures period and before the publication of the ITC's final injury determination.
Critical Circumstances Finding
An important aspect of the ITC's final determination was its finding regarding critical circumstances. The ITC concluded that critical circumstances do not exist for imports of polypropylene corrugated boxes from Vietnam. This finding has direct implications for importers. As a result, Commerce intends to instruct CBP to lift the suspension of liquidation and to refund all cash deposits for estimated antidumping duties that were collected on entries of subject merchandise made between October 2, 2025, and December 31, 2025. This period represents 90 days prior to the preliminary determination's publication date up to the preliminary determination's publication date itself.
Suspension of Liquidation and Cash Deposits
Effective upon the publication of the ITC's final affirmative injury determination, Commerce will instruct CBP to reinstitute the suspension of liquidation for polypropylene corrugated boxes from Vietnam. Concurrently, CBP will require cash deposits equal to the estimated weighted-average dumping margins. For the 'Vietnam-Wide Entity,' the weighted-average dumping margin has been set at 130.58 percent, a rate based on facts available with adverse inferences. These instructions for suspension and cash deposits will remain in effect indefinitely until further notice from Commerce.
Provisional Measures Period Clarification
Federal trade law stipulates that the suspension of liquidation under an affirmative preliminary determination cannot exceed four months, extendable to six months upon request. In this case, Commerce's Less-Than-Fair-Value (LTFV) Preliminary Determination was published on December 31, 2025, meaning the six-month provisional measures period ended on June 28, 2026. Therefore, Commerce will instruct CBP to terminate the suspension of liquidation and liquidate without antidumping duties all unliquidated entries of polypropylene corrugated boxes from Vietnam that entered or were withdrawn from warehouse between June 29, 2026, and the day preceding the publication of the ITC's final injury determination. The suspension of liquidation and collection of cash deposits resumed only upon the publication of the ITC's final determination.
Administrative Procedures for Interested Parties
To enhance transparency and administration, Commerce maintains an annual inquiry service list for each antidumping order. Interested parties, such as law firms representing importers or domestic producers, who wish to receive notifications regarding administrative reviews, scope rulings, or circumvention inquiries, must submit an entry of appearance to this list within 30 days of the order's publication. While petitioners and foreign governments are automatically placed on this list after their initial entry, they are responsible for updating their contact information annually. This system, accessible through Commerce's Antidumping and Countervailing Duty Electronic Service System (ACCESS), streamlines communication and ensures all relevant parties are informed of ongoing administrative actions related to the order.
