... in fields such as chemical ,urethane elastic fiber, rubber, plastic, tyre, polyurethane, biological technology, intermediate, etc.3. Electronic industry: For encapsulation ... Nitrogen Purity:95%-99.9995% (95%, 97%, 98%, 99%, 99.5%, 99.9%, 99.99%, 99.999%, 99.9995%) ModelN2 Purity ...