Views:6 Author:Site Editor Publish Time: 2020-07-17 Origin:Site
Protective coverall has a history of more than 100 years, and modern applications are also very extensive. What is the history of protective coverall and what are performance requirements of protective coverall?
The history of protective coverall
Performance requirements of protective coverall
More than 100 years ago, in order to prevent microorganisms from invading sterile operating rooms and to protect patients from bacterial infections caused by medical staff, hospitals began to use specialized protective coverall.
In 1952, William C. Beck pointed out that the material of protective coverall should be able to block the entry of liquids. In the past, surgical gowns had the ability to prevent bacterial penetration when dry, but they were unable to resist the invasion of bacteria in the wet state.
During World War II, the U.S. military developed a high-density woven fabric treated with fluorinated carbon and benzene compounds to enhance its waterproof performance. Civil hospitals began to use these fabrics as fabrics for medical protective clothing after the war.
Since the 1980s, with the deepening of human understanding of blood borne pathogens such as HIV (HIV), HBV (Hepatitis B virus), and HCV (Hepatitis C virus), people have paid more and more attention to the possible impact of medical staff in treating patients. The risk of infection, so countries began to focus on the development of medical protective clothing, so that the protective clothing industry has flourished. In particular, during the SARS outbreak in 2003, medical workers were constantly being infected, making people realize the importance of self-protection.
In addition to the specifications and safety requirements of the material itself, the performance of protective coverall mainly includes protection, comfort, and physical and mechanical properties.
Protective properties are the most important performance requirements for medical protective clothing, including liquid barriers, microbial barriers, and barriers to particulate matter.
Liquid barrier means that medical protective clothing should be able to prevent the penetration of liquids such as water, blood, alcohol, etc., and have a hydrophobicity of level 4 or higher to avoid contamination of clothing and human body. Prevent the blood, body fluids and other secretions of the patient from transmitting the virus to the medical staff during the operation.
Microbial barriers include barriers to bacteria and viruses. The barrier to bacteria is mainly to prevent contact transmission (and back propagation) of medical personnel to the patient's surgical wound during the surgery. The isolation of the virus is mainly to prevent the medical staff from contacting the patient's blood and body fluids, and the virus carried in it causes cross infection between the doctor and the patient.
Particulate matter barrier refers to preventing viruses transmitted through the air from being inhaled or attached to the skin surface and absorbed by the human body in the form of aerosols.
Comfort includes breath ability, water vapor permeability, drape, quality, surface thickness, electrostatic properties, color, reflectivity, odor, and skin sensitization. The most important is breath ability and moisture permeability. In order to enhance the protective effect, protective clothing fabrics are usually laminated or laminated, resulting in heavy, breathable and poor moisture permeability, which is not conducive to perspiration and heat. The antistatic requirement is to prevent the static electricity in the operating room from adsorbing a large amount of dust and bacteria to the wound of the patient, and to prevent sparks generated by static electricity from detonating volatile gases in the operating room and affecting the accuracy of precision instruments.
Physical and mechanical properties
Physical and mechanical properties mainly refer to the ability of medical protective coverall materials to resist tearing, puncture and abrasion. Avoid tears and punctures to provide a channel for bacteria and viruses to spread, and abrasion resistance can prevent flocs from providing a place for bacteria and viruses to multiply.
In addition to the properties listed above, medical protective coverall needs to have disinfection tolerance, good color fastness to washing, prevention of shrinkage, non-combustibility, non-toxicity and non-irritant, and harmless to the skin.
The purpose of protective clothing is mainly to protect the human body from the external environment and the human body on the product and the working environment. It has a wide range of applications, such as: 1) exterior wall coating construction, glass wool insulation construction, polyurethane wall decoration , Machinery and ship surface treatment spray painting. Polished surface polishing, frosted spray paint treatment of wooden surfaces and other highly polluted environments. 2) The production of high-precision electronic components, the assembly of precision optical equipment, the experimental study of biochemical organic matter, the use of pesticides, pesticides, and fertilizers for agriculture, forestry, animal husbandry and animal husbandry. 3) Bio-pharmaceutical industry production, vaccine culture laboratory. 10,000-level purification workshop protection. 4) Food processing: dairy products production and filling.
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