Tosoh Corp. (TYO:4042) has announced plans to expand production capacity of polyvinyl chloride (PVC) at local affiliate Philippine Resins Industries Inc. (PRII). Tosoh will be investing approximating 4.2 billion yen ($37.05 million) to take annual production capacity from its current level of 100,000 tons up to 210,000 tons. Construction is slated to start in February this year and conclude in…