Mainland and Taiwanese polyvinyl chloride (PVC) makers will likely gain market share at the expense of Japanese producers if China announces preliminary anti-dumping tariffs today. The expected tariffs would have a similar impact as in the anti-dumping tariffs the mainland last year slapped on Korean polyester chip imports, which benefited Taiwanese makers. The Ministry of Foreign Trade and Economic Co-operation was expected to announce preliminary tariffs against major PVC exporting companies by the end of this month, with final tariffs expected by September, JP Morgan said in a research report. 'Tariffs on Japanese PVC imports may be so high as to significantly reduce [the presence of] Japanese PCV in the market,' the report said. 'Japan's share of China's PCV market was 27.4 per cent last year.' The report quoted industry sources in Japan, Taiwan and Korea as expecting United States producers to be the hardest hit with a tariff of 24 per cent; Japanese exporters 20 per cent or higher; Korean makers 6 per cent to 10 per cent and Taiwanese producers 5 per cent. 'A 20 per cent tariff against major PVC exporting nations like Japan, the US and Russia would translate into protection of US$140 per tonne [the present PVC price is US$700],' JP Morgan said. As China's imports accounted for about half global PVC trade, its prices dominated regional export prices, the brokerage said.