How to use SMS nonwoven fabric to produce surgical gowns with three antibodies by spunbond non woven machine in Saudi Arabia/Thailand?
Since the outbreak of the epidemic, protective clothing and surgical clothing materials have become the “fragrant buns” in the medical textile industry.
This time, we will introduce a textile fabric that is very suitable for making protective clothing – SMS composite non-woven surgical gown material.
During the operation of medical staff, HBV (Hepatitis B virus), HCV (Hepatitis C virus), HIV (HIV), SARS, New Coronary Pneumonia and other viruses transmitted through blood or mouth spray will threaten their life safety. Therefore, medical surgical gowns and isolation gowns with good isolation are essential.
Disadvantages of woven protective clothing：
1.After repeated use, washing, and disinfection, woven protective clothing can reduce its toughness.
2.Repeated use of cloth products after 25 cycles of washing can significantly reduce their resistance to microorganisms, increase the risk of infection for patients, and also be detrimental to protecting the health of medical staff.
3.During the surgical process, it is easy to shed the fabric villi, making it difficult to ensure that the entire surgical process is in a sterile state.
Faced with such a situation, medical protective clothing products in developed countries, especially materials such as surgical gowns and isolation gowns, are gradually developing towards disposable materials.
Polypropylene spunbond and melt blown composite nonwoven fabrics have become popular in the entire market due to their unique properties.
According to incomplete statistics, SMS nonwoven is the main material used for disposable surgical gowns, accounting for about 60%, while some use spunlaced fabric (wood pulp/polyester composite fabric) and laminating materials, accounting for about 30%.
Isolation clothing mainly uses SS or SMS. SMS spunbond and meltblown non-woven fabrics dominate.
What is SMS spunbond nonwoven fabric?
SMS refers to the material of polypropylene spunbond and melt blown composite nonwoven surgical gowns.
S — Spunbond, also known as spunbond;
M — Meltblow, also known as melt blown nonwoven fabric.
Spunbond nonwoven fabric – providing good tensile resistance
Melt blown nonwoven fabric – with excellent filtering and shielding performance
SMS composite nonwoven fabrics, combined with spunbonded and melt blown nonwovens, fully utilize the advantages of both and overcome their shortcomings, with good adsorption, filtration, bacterial resistance, and high permeability resistance.
However, the safety guarantee performance of medical protective equipment directly made from it is not enough.
Therefore, it is necessary to improve performance through post processing.
Three Resistance Finishing of SMS Composite Non woven Fabric:
1.Anti alcohol (blood)
-SMS composite non-woven fabric alcohol resistance test chart
Alcohol is a commonly used disinfectant in hospitals, and it often comes into contact with blood and body fluids carrying pathogens during medical emergencies. However, due to the slightly higher critical surface tension of ethanol compared to polypropylene, the alcohol resistance of ordinary SMS composite non-woven fabrics cannot effectively shield alcohol and blood.
Therefore, it is necessary to screen out finishing agents with lower critical surface tension, such as fluorinated hydrocarbon chain compounds with groups such as – CF3 and – CF2H -. The critical surface tension of these substances is much lower than that of water and alcohol, and the SMS treated with them has excellent waterproof and alcohol resistance properties.
2.Resistance to static water pressure
-Textile static water pressure tester
Anti hydrostatic pressure refers to the ability of a test material to resist the rise of water pressure. The higher the anti hydrostatic pressure, the better the product’s resistance to blood splashing during surgery.
3.Antistatic
-Portable surface resistance tester
Anti static electricity is an important indicator of safety and comfort. The accumulation of static charges not only causes discomfort when clothes rub against the body, but also has adverse effects on precision instruments.
Therefore, it is necessary to organize the disposable surgical clothing materials with three antibodies to meet the requirements of disposable medical protective clothing.
Handling Difficulties:
1. Alcohol resistant finishing requires reducing the surface tension of the object, making the SMS surface resistant to hydrostatic pressure and alcohol (blood) penetration, and reducing the absorption performance of liquids.
2. Anti static electricity requires the surface to have strong moisture absorption and moisturizing properties, in order to reduce the generation of static electricity and quickly conduct static electricity to dissipate charges as soon as possible.
3. The static water pressure of SMS comes from the high shielding effect of its M-layer, so the water pressure resistance performance of SMS fabrics of different specifications also varies. Both alcohol resistance and anti-static finishing can have a negative impact on the water pressure resistance effect.
4. These three types of functional finishing are contradictory and contradictory to each other. Considering their mutual influence, the best method is to choose a finishing agent with good compatibility and use a one-step one bath method to finish it, so that it has seemingly contradictory multiple functions at the same time. However, since it is a combination of multiple test agents, it is necessary to consider the compatibility of the product.
