Sealing membrane application in the packaging industry's main advantage is to save the cost of the whole packing process.Sealing film is applied to automatic packing machine, packaging enterprises undertake any edge banding work only in a production enterprise for one-time sealing side operation.Therefore, packaging production enterprises to undertake printing operations only can, and since the supply of roll so transportation costs also fell.Sealing membrane reduces when the emergence of the whole process of plastic packaging printing, transportation, encapsulates three steps, greatly simplify the procedure of packaging to reduce the cost of the whole industry, is the first choice for small package