* Doubles polysilicon capacity at plant vs original plan * To spend 30 pct more on Malaysia plant than original plan * Shares close up 2.9 pct vs Nikkei's 0.6 pct rise (Adds background, details,...
SINGAPORE, April 2 - Japan's Idemitsu Kosan Co <5019.T> ramped up output at its 623,000 tonnes per year (tpy) Tokuyama naphtha cracker to 100 percent in late March, following the shutdown of its Chiba unit,...