Type5 protective clothing requirements for heat and humidity comfort: clothing comfort refers to the wearer's subjective perception and judgment of whether the clothing is comfortable or not in combination with various physiological, physiological and psychological processes. Among them, the thermal and wet comfort of clothing is an important indicator for evaluating the comfort of clothing.

Heat and humidity comfort refers to the coupling of heat and humidity in the microenvironment composed of the human body, clothing and the external environment, so that the human body and the external environment achieve the necessary thermal balance, and the energy exchange reaches a balanced state, so as to maintain a certain degree of comfort and achieve the human body. It is not hot or cold, not humid and airtight, and it is comfortable and satisfying. Since it is difficult to use a single index to characterize the heat and humidity comfort, the sweating dummy method and the thermal dummy method are commonly used to evaluate the heat and humidity comfort of clothing, and the requirement for moisture permeability is not less than 2500g/(m2d). Although better liquid barrier ability helps improve the protective performance of Type5 protective clothing, it also makes it difficult for the sweat produced by the human body to be excreted. In addition, the closed-opening garment structure makes Type5 protective clothing less comfortable in heat and humidity.

At present, Type5 protective clothing with a large market share is usually prepared by spunbond lamination method or spunbond-film-spunbond composite method. Although the disposable medical protective clothing prepared by this technology has good protective performance, it has some shortcomings in terms of heat and humidity comfort. This is mainly because polypropylene spunbond nonwovens do not absorb water, and the protective film used in the lamination method has poor air permeability.

Although a single polypropylene spunbond nonwoven fabric has good strength, it cannot effectively protect particles and bacteria in the barrier environment due to its large pores. Therefore, a single polypropylene spunbond nonwoven fabric needs to be compounded with a protective film to meet the Requirements for the use of disposable medical protective clothing. Compared with polypropylene spunbond nonwovens, the surface of the protective film is denser, so the use of the protective film improves the protective effect of Type5 protective clothing. However, due to the lack of pores on the surface of the protective clothing, the "sweat" produced by the wearer is difficult to discharge, which aggravates the wearer's sultry feeling. In order to improve the wearing comfort of protective clothing, most manufacturers currently use calcium carbonate powder to prepare micropores on the surface of the protective film in the production of special materials, thereby improving the breathability of the protective film. However, too much calcium carbonate powder will reduce the protective performance of the protective film. Therefore, balancing the protection and comfort of protective clothing is still an important issue for medical protective clothing.

Due to the heavy workload of medical workers, in the process of treating patients, medical workers often sweat a lot. If the Type5 protective clothing does not have the function of moisture absorption and quick drying, a large amount of moisture will not be discharged from the protective clothing. At present, the main material of medical protective clothing is polypropylene spunbond non-woven fabric. Since polypropylene has no hydrophilic group, it is difficult for the wearer to expel moisture, resulting in poor thermal and wet comfort experience for the wearer.