There are no dead wrinkles, no bubbles, no holes and impurities on the surface that affect appearance and performance;The end face of the film roll is flat and tightly wound, with no obvious gaps inside, and the printing is clear and clean, and there is no obvious color difference;No shrinkage, caking, hot film phenomenon when hot-covered with asphalt;When the membrane is used, lt can be roasted and melted quickly without caking.