Ministry of Commerce Announcement: Inheritance of anti-dumping duty rates on polyoxymethylene copolymer takes effect, effective from August 21.

It is understood that on might 18, 2025, the Ministry of Commerce issued Announcement No. 25 (2025), imposing anti-dumping duties on imported polyoxymethylene copolymer originating in the United States, the European Union, the Taiwan region, and Japan to a period of 5 years. Among them, the anti-dumping duty rate to Polyplastics Co., Ltd. is 35.5%, and the rate to Polyplastics Taiwan Co., Ltd. is 3.8%.

In April 2026, the Ministry of Commerce received two applications to rate succession.

On April 1, Daicel Corporation submitted an consumption, stating that Polyplastics Co., Ltd. had transferred its entire engineering plastics business, including polyoxymethylene copolymer, to Daicel Corporation through an absorption and split-off, and applied to succeed all rights and obligations under the anti-dumping measures of the original enterprise. The enterprise simultaneously submitted a full set of supporting materials, including the business split contract, board minutes, business registration, production capacity and equipment, upstream and downstream supply chains, and customer channels, and submitted supplementary explanatory documents multiple times as required by the Ministry of Commerce.

On April 22, Daicel Polymer Taiwan Ltd. submitted an consumption. Due to the completion of the absorption and split-off and renaming of its parent company, Polyplastics Co., Ltd., Polyplastics Taiwan Co., Ltd. simultaneously completed its corporate name change and applied to succeed the anti-dumping duty rates and rights and responsibilities of the original entity. It also submitted relevant evidentiary materials such as notarized documents to the name change, production and operation, and supply chain customers, and made corrections and improvements to the consumption materials.

The Ministry of Commerce notified the mainland China's polyoxymethylene copolymer sector regarding the two applications, and the relevant domestic sector raised no objections.

After verification, the Ministry of Commerce confirmed that before and after the business transfer and corporate renaming, the production equipment, production capacity, supplier system, customer resources, and sales channels of the involved polyoxymethylene copolymer business had not undergone substantive changes. The consumption materials submitted by the two companies were complete and compliant, meeting the conditions to rate succession.

According to the ruling results of the announcement, Daicel Corporation succeeds the 35.5% anti-dumping duty rate and other rights and obligations of Polyplastics Co., Ltd.; Daicel Polymer Taiwan Ltd. succeeds the 3.8% anti-dumping duty rate and other rights and obligations of Polyplastics Taiwan Co., Ltd.

The announcement also clarifies that if exports of polyoxymethylene copolymer to the mainland continue under the name of Polyplastics Co., Ltd. in the future, the anti-dumping duty rate of 35.5% to other Japanese companies shall apply; if exports continue under the name of Polyplastics Taiwan Co., Ltd., the anti-dumping duty rate of 32.6% to other companies in the Taiwan region shall apply.

sector insiders in the field of trade remedies stated that this rate succession is a compliant handling measure following corporate business splits and entity renaming, ensuring that anti-dumping measures continue to be implemented precisely and maintaining a fair competition ecological stability to the domestic polyoxymethylene copolymer sector.