China’s Ministry of Commerce has issued a preliminary ruling on the anti‑dumping investigation of MMA (Methyl Methacrylate) monomer imported from Japan and South Korea. A provisional anti‑dumping deposit measure officially takes effect on **August 20, 2026**, valid for three months. This policy targets raw MMA monomer only and does **not** cover finished PMMA acrylic sheets. It brings multi‑layer impacts on China’s domestic acrylic‑sheet manufacturing industry.

Key Policy Details

• The provisional deposit rate stands at 12.7% for non‑responding enterprises. Importers must pay the deposit to Chinese customs upon import. Funds will be refunded or converted into formal anti‑dumping duties after the final verdict in three months.
• Subject product: MMA monomer under HS code 29161400. PMMA pellets, colored acrylic sheets and other finished products are excluded from this measure.
• Main involved suppliers: LG Chem, Lotte Chemical from South Korea; Mitsubishi Chemical, Asahi Kasei, Sumitomo Chemical from Japan.

Impacts on Domestic Acrylic Industry

1. Higher cost for enterprises relying on imported Japanese‑Korean MMA:Companies that import Japanese‑Korean MMA monomer for self‑polymerization will face increased raw‑material costs. Cash deposit payments occupy working capital and raise capital turnover pressure.
2. Boost market competitiveness of domestic MMA producers:Domestic MMA manufacturers gain obvious cost advantages. More acrylic‑sheet factories shift purchasing toward local MMA resources. Domestic MMA product demand is further supported.
3. Stable export performance of finished acrylic sheets:Since this measure applies only to raw monomer, China‑made colored acrylic sheets, craft‑grade acrylic panels and commercial‑display sheets for export are not directly affected. Export orders to Southeast Asia, Middle East, Africa and Europe remain unaffected.
4. Accelerate domestic supply‑chain independent development:Domestic acrylic sheet manufacturers are motivated to optimize raw‑material supply chains and reduce reliance on overseas monomer supplies. It accelerates the whole‑chain upgrading from MMA monomer to PMMA pellets and finished acrylic sheets.
5. Market expectation: watch for final‑verdict changes:The provisional deposit is not formal anti‑dumping tax. Industry participants need to follow the final‑verdict result. If dumping is not confirmed, the deposit will be fully returned.

Industry Outlook

 Against the backdrop of global chemical supply‑chain reshuffling, Chinese acrylic enterprises face both challenges and opportunities. Short‑term cost pressure exists for partial raw‑material importers. In the long run, the policy encourages the whole domestic acrylic industry to move toward high‑purity raw‑material localization, stable quality control and diversified supply layout. For export‑oriented acrylic sheet manufacturers, selecting qualified domestic MMA sources helps stabilize quotation and delivery cycles, which will become a key selling point for winning overseas commercial‑display and craft‑processing orders.