Protective clothing with excellent waterproof, breathable and barrier properties

Abstract

The present invention provides a protective clothing with excellent waterproof, breathable and barrier properties. The protective clothing has excellent waterproof, breathable and barrier properties,is waterproof and precise in breathability, keeps effective barrier to blood and viruses, is prepared from a microporous laminated composite material, is used in a positive pressure type protective clothing manner, and mainly comprises a protective hood, and a jacket and trousers with waterproof and precise breathable functions, when the air inlet flow of the protective clothing is adjusted between 85 L / min and 510 L / min; the micro-porous laminated composite material adopted by the main body part of the protective clothing has the capability of stably leaking air and water vapor outwards; theair inlet flow and the leaked air flow of the protective clothing can be balanced, stable positive pressure ranging from 300 Pa to 1500 Pa can be established in the protective clothing, and the dehumidification capacity of the protective clothing is larger than 500 g / (m<2>*h). The micro-porous laminated composite material adopts a three-layer structure: a middle layer adopts a micro-porous PE filmwith a nanoscale aperture as a gas precision slow-release layer, two sides adopt non-woven fabrics as protective layers, and an interface adopts a hot melt adhesive for strip-shaped or gridding hot-pressing composite connection reinforcement.

Description

technical field [0001] The invention belongs to the field of medical protective clothing, in particular to a positive pressure protective clothing capable of blocking coronaviruses, germs, blood, etc., breathable, moisture permeable, and comfortable. Background technique [0002] Medical protective clothing is protective clothing worn by staff and patients in the medical and health system. Its function is to provide protection for medical staff and patients, effectively prevent bacteria, viruses, body fluids, blood, aerogels, etc. from penetrating to cause infection and prevent crossover. Infect. [0003] With the emergence of SARS caused by coronavirus during SARS in 2003, the Middle East Respiratory Syndrome with higher lethality caused by MERS virus around 2015, and the emergence of novel coronavirus (COVID-19) in 2019 and multiple local outbreaks around the world It reflects the shortage of high-quality medical protective clothing and isolation and protective equipment ...

AI Technical Summary

Problems solved by technology

[0003] With the emergence of SARS caused by coronavirus during SARS in 2003, the Middle East Respiratory Syndrome with higher lethality caused by MERS virus around 2015, and the emergence of novel coronavirus (COVID-19) in 2019 and multiple local outbreaks around the world It reflects the shortage of high-quality medical protective clothing and isolation and protective equipment worn by patients, as well as the serious shortage of product quality and performance. The overall performance is: 1. The pressure of medical masks and goggles on the head and face 2. The seal between the medical mask and the face is very unreliable and easy to be infected; 3. Disposable protective clothing made of ordinary non-woven fabrics (non-woven fabrics) cannot effectively block the penetration of virus carriers such as aerogels; The moisture permeability of disposable protective clothing is not good. When medical staff enter the intensive care unit to work, they are basically in a state of moderate to heavy physical exertion. They sweat a lot and cannot be discharged or volatilized in time. The human body is in a hot and humid state of severe discomfort; 4. Half of ordinary positive pressure protective clothing is made of rubber-coated fabric. Although it has good barrier properties and can send clean air from the hood, the coated fabric material used is basically airtight after swelling, mainly relying on the elastic closure. Partial leakage, the air supply volume is basically limited below 230L / min, it is difficult to achieve effective heat transfer and mass transfer, the wearer's sweat and volatilized water vapor cannot be effectively and timely volatilized to the outside of the protective clothing, and the wearer's stuffiness The comfort and comfort are still not well resolved. After the internal water vapor content is high, the humidity in the protective clothing gradually increases, and the goggles of the hood are easy to fog, which affects the visual effect; 5. The flash method is used to form HDPE at one time The microporous nonwoven material made of continuous fibers has uneven distribution of micropores, the pore size is on the order of microns, and the filtration efficiency of different parts varies greatly. The barrier property of sticky (SMS) PP nonwovens is relatively high, but because its air permeability is basically on the same order of magnitude as SMS PP, the air permeability is too large to achieve the state of positive pressure clothing, and generally needs to be used with medical masks and goggles , the perspiration and heat dissipation capabilities of medical staff are still poor after wearing, and the physical exertion is relatively large.

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