Malaysia will impose anti-dumping duties of up to almost 50 percent on companies from Taiwan, Indonesia, South Korea and Thailand for exporting plastic products that have hurt domestic producers, a report said Friday.

The Ministry of International Trade and Industry decided to impose the duties, ranging between 5.13 and 49.25 percent, after investigating the impact of polyethylene terephthalate or PET plastic exports to Malaysia, said the New Straits Times.

"The government has now completed the final investigations ... and has confirmed that dumping has occurred and the domestic industry was materially injured," the ministry was quoted as saying.

The duties on the companies, which produce PET for bottles, films and sheets and straps, will take effect from October 23 and last for a maximum of five years.

Anti-dumping probe

Among the companies to be hit by the duties are Taiwan-based Forlin Corporation and Far Eastern Textile, Indonesia's PT Bakrie/Kasei Corporation and PT Indorama Synthetics, Thailand's Bangkok Polyester Public and Thai PET Resin, and South Korea's Daehan Limited and Honam Petrochemical Corporation, said the newspaper.

The government started an anti-dumping investigation in January this year after receiving a petition from Malaysian PET producers, with preliminary findings that dumping had occurred.

It imposed provisional anti-dumping duties in June.