ZHENGZHOU - PTA (purified terephthalic acid) futures closed higher Thursday in daytime trading on the Zhengzhou Commodity Exchange (ZCE).

The most active PTA contract for September 2020 delivery gained 28 yuan ($4) to close at 3,634 yuan per ton.

On Thursday, the total trading volume for 10 listed PTA futures contracts on the ZCE was 1.13 million lots with a turnover of 20.92 billion yuan.

As the world's largest producer and consumer of PTA, China listed PTA futures on the ZCE in 2006 and opened them to international investors in November 2018.

PTA, a commodity chemical and textile raw material, is a downstream product of petroleum and one of the most important bulk organic raw materials in China.