Compared with non-woven fabrics, medical dialysis paper has the characteristics of low price, convenient use, etc. So what are the influencing factors for its permeability?
1. The permeability of paper is affected by many factors, such as raw materials, beating process (such as beating concentration, beating power, beating degree, etc.), papermaking process such as pressing pressure, drying method, calendering, etc. PAE has an important influence on the air permeability of medical dialysis paper. Some medical sterilization packages need to be sterilized by high pressure steam before use, which requires medical dialysis paper to have certain wet strength. Wet strength agent can be added in production. PAE is currently the most widely used wet strength agent.
2. Dry strength agent has an important influence on the air permeability of medical dialysis paper. Medical sterilization equipment packaging should have certain mechanical strength during production, transportation and use. Common dry strength agents are mainly anionic, cationic starch, cationic polyacrylamide, zwitterionic polyacrylamide or graft copolymer.
3. Sizing has an important influence on the air permeability of medical dialysis paper. It is required that sterilized packaged products should be opened without paper wool, and the peeling structure should be continuous and uniform, without polluting medical devices after opening. Therefore, it is necessary to ensure moderate heat sealing strength and further improve the internal bonding strength and surface properties of medical dialysis paper. Surface sizing is one of the commonly used methods to improve surface properties.
