Lab - used spiral wound membranes are divided into transfer - type and sealing - type categories. Transfer - type membranes, such as the Immobilon® series, can be flexibly cut into different sizes, suitable for experiments like protein immunoblotting and nucleic acid blotting, which can reduce fingerprint contamination and achieve high utilization rates. Sealing - type heat - sealable spiral wound membranes are commonly used in high - throughput experiments such as PCR and ELISA. They can tightly seal reagent plates after heating, preventing sample evaporation and contamination, and are compatible with automated operations to improve experimental efficiency.