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The root cause of non-woven fabrics that cannot be reused

by:XINYU Non-woven     2022-02-26

Many people question why medical non-woven fabrics cannot be reused, and what is the root cause. Today, Xinyu Non-woven Technology will explain to you.

The sterile barrier properties are missing after use

According to analysis, the storage period of sterile items is closely related to the thickness of non-woven fabrics and the number of layers of wrapping cloth. After a series of high-temperature steam sterilization and chemical cleaning of disposable non-woven packaging materials, the fiber structure is deformed, the holes are sparse, the thickness is reduced, and even small holes that are not easily detectable by the naked eye occur, and the bacteria resistance rate will drop suddenly or is the loss of bacteriostatic properties. The requirements for packaging raw materials in the 'Technical Specification for Disinfection' are: in the storage process, provide a bacterial barrier and maintain a sterile state. If the disposable packaging material packaging device is reused, the storage after sterilization cannot reach the safe validity period.

Internal microscopic properties change after sterilization

The non-woven packaging material is generally SMS composite non-woven fabric. The key material of this type of non-woven fabric is polypropylene, which is produced and processed through multiple processes using meltblown and spunbond processes. The microstructure is fine plastic fibers. Shrinkage after being exposed to high temperature is a characteristic of plastic articles. There is no real high temperature resistant plastic, and high temperature resistance is also a relative definition, so non-woven fabrics will also have corresponding shrinkage reactions on the microscopic level.

After high temperature sterilization, the fine plastic fibers of the non-woven fabric will shrink to a certain extent, and the performance is that the non-woven fabric after sterilization is more brittle and flexible than before sterilization. has declined. The change of non-woven packaging materials is one of the fundamental reasons why non-woven fabrics can only be used once.


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