On June 9, the 40,000t / a styrene-butadiene rubber production line of Dushanzi Petrochemical Company maintained 102% high load operation, with an SBST161B output of 5.1t per hour. For the first time, the company optimizes the innovative conversion mode and realizes the online conversion of two different types of products, which not only increases the output of SBS products by more than 700t, but also saves 6 days maintenance time and saves more than 300,000 yuan.