Toray Industries Inc., the world's largest producer of carbon fiber, plans to increase capacity as customers from Daimler to Boeing. boost the use of the lightweight material to make fuel-efficient cars and planes.

Capacity at the end of the decade may double from a targeted level of 27,100 metric tons a year in 2015, Moriyuki Onishi, senior vice president and head of the carbon fiber composites division, said in an interview.

Toray expects sales of carbon fiber composite materials to increase 29 percent to ¥90 billion this business year, or 5 percent of its estimated ¥1.7 trillion revenue, an Aug. 6 statement said.