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Difference Between PP And SMS Nonwovens

 Medical non-woven fabrics, the commonly used polymer material is PP, that is, polypropylene as a raw material spinneret made of non woven fabrics, because PP has no hydrophilic group, so the surface of non-woven fabrics should be sprayed with a very small amount of 0.5% hydrophilic oil agent.

Difference between PP and SMS Nonwovens (PP S2040)
 
The material is made of fibers.
 
The full name of PP is polypropylene, and the Chinese name is polypropylene. NW is short for Nonwoven, which is either nonwoven or nonwoven. Is the fiber through the air flow or machinery into a net, and then after spunlaced, acupuncture, or hot rolling reinforcement after finishing the formation of no woven cloth.
 
PPNW stands for nonwoven fabric made of PP fiber. Due to the nature of PP itself, the cloth after the performance is strong, but the hydrophilicity is poor. The usual process flow of PPNW is spinning into mesh and hot rolling reinforcement. PPNW is widely used in sterilization pouches, surgical protective gown, industrial cloth, etc.
 
SMS non-woven fabric (English :Spunbond+Meltblown+Spunbond
 
Nonwovens is a composite nonwoven fabric, which is a composite product of spunbonded and melt-blown. It has the advantages of high strength, good filtration performance, no adhesive, non-toxic and so on. At present, it is mainly used for medical and health labor protection products, such as surgical gowns, surgical caps, protective gowns, hand washing gowns, handbags, etc.
 
S stands for spunbond, which translates into spunbonded non woven fabric in Chinese; M stands for Meltblown, Chinese translation of Meltblown non-woven cloth. In the process of non-woven fabric, there is a sandwich structure material called SMS, which is a spunbonded meltblown spunbonded structure. This material combines the characteristics of strong spunbonded fabric and good barrier of meltblown fabric, and is often used in medical medical materials. We don't use the abbreviations you mentioned.
 
SMP, I think it's spunbond melt-blown composite, using PP material.
 
SM is for Spunmelt.
 
SSPP is spunbond, with PP material. In general, SS is the representation of two layers of spunbond.
 
1. Changes in internal microscopic properties occur after antivirus
 
The main material of medical nonwoven fabric is polypropylene, which is processed through melt-blown and spunbonded process through multiple processes, and its microstructure is fine plastic fiber. Shrinkage after high temperature is the characteristics of plastic goods, high temperature resistant plastic is not, and high temperature resistance is also a relative concept, so it will also have the corresponding shrinkage reaction on the micro.
 
2. Aseptic barrier performance is lost after use
 
According to research, the shelf life of sterile articles is closely related to the thickness and the number of coating layers of medical non woven fabric. After a series of high-temperature steam antivirus and chemical washing, the fiber structure is deformed, the hole is sparse, the thickness is reduced, and even the small hole is not detectable to the naked eye. The bacteria resistance rate will suddenly decrease, or the bacteria resistance performance will be lost.
 
So used medical non-woven fabric, no matter use how long, no matter use what it made things, those who use shall be thrown away after using, because the hospital many germs, doctors in treating patients are using it will unknowingly brought many germs, so in order to cut off the route of transmission, prevent infection, who used shall be disposed of, It can no longer be used.

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