Eastman Chemical Co. says it will need a month or more to bring its specialty copolyester production back to full operations following a Jan. 31 steam line failure that shut down operations across its Kingsport plant.In a news release detailing expected financial impacts, the company said all areas of the massive plant “are safely returning to operations as quickly as possible.” Eastman noted specialty copolyesters was “the primary impacted area.” It expects a four to six-week recovery period.