Wuhan Jinzhifei Purification Equipment Co., Ltd.

1. The human body is the largest source of pollution in clean rooms
The human body is a serious source of pollution. The surface of human skin will emit particles, and the intensity of the emission will change and vary with time and different people. The surface area of a person On average, it is . square meter, and the outer layer of skin undergoes metabolic renewal every few days. Therefore, people are emitting hundreds of thousands and millions of particles with particle diameters of . micron and above every minute, and the total amount of particles emitted is up to grams every day and night.
2. Function of clean clothes
The function of clean clothes is like a shielding filter, protecting products and processes from human contamination. Therefore, clean clothing should be made from fabrics that can filter contamination. Cleanroom clothing should also be designed to cover people and prevent large amounts of unfiltered human body emissions from entering the clean room. Spread can be better reduced by using effective clean room clothing and scrubs.
Most contamination comes from human skin and non-clean room clothing, but contamination can also spread on the surface of clean clothing fabrics. Fabrics made for clean use should not increase the pollution burden.
People emit inert and microorganism-carrying particles when they sneeze, cough and talk. People can spread contamination from their hands to cleanroom surfaces when they touch surfaces. Depending on the class of cleanroom, it may be necessary to wear face masks, ventilated hats and gloves to minimize the spread of this type of contamination.
Clean clothing should be selected according to the cleanliness of the product and process requirements, but under normal circumstances, it generally consists of a hood, a hat, a full-body suit with a hood, high-waisted boots, a mask and safety glasses.
3. General Choices for Cleanroom Clothing
The best designed cleanroom garments cover the entire body and have good closure at the wrists, neck and ankles. Although the selection is based on the level of the clean room, the standard for clean rooms with higher cleanliness requirements is to use a one-piece full-body suit, high-waisted boots and pockets with sleeves or skirts that can be folded under the stand collar of the garment. cap. The higher the technical requirements for a clean room, the greater the restriction or discomfort to people. Therefore, one should consider what exactly is required in relation to the cleanliness standards of the room. Coveralls with lower coverage are acceptable as long as cleanliness and workmanship requirements permit. Some enhanced units have built-in clean air systems, which can simplify the cleaning clothing requirements.
There are two broad categories of clean room clothing: disposable (or restricted use) and reusable. Typically, disposable or limited-use garments are made of non-woven materials and are used once or a few times and then discarded. Reusable garments are processed regularly and are usually made from densely woven synthetic fabrics. More critical applications will require thin film barrier technology. Natural fabrics made from fibers such as cotton are generally not used in clean rooms because they break easily and spread contamination.
4. Characteristics of fabric
.Shielding characteristics
The fabric used in the clean room should be able to prevent the pollution caused by people from dispersing into the clean room. The textile fabric can act as a filter and its effectiveness depends on the tightness of the fabric weaving. sex. The effectiveness of the weave can be tested by measuring the pore size and how efficiently the fabric removes particles. The shielding effectiveness of a fabric can be assessed by measuring its air penetration, particle retention and pore size. When people move, as the penetration rate decreases, the pressure inside the clothes will increase accordingly, which may cause unfiltered air to be forced out through the clean clothes. Therefore, fast walking in the clean room should be avoided.
.Durability
Cleanroom clothing should be resistant to breakage and abrasion, and the fabric should emit as few particles as possible.
3. Electrostatic properties
In some clean rooms (such as microelectronics or rooms with flammable or explosive chemicals), the accumulation of static charges on the surface of clothing can endanger manufactured components or cause harm operator. The efficiency of a fabric in dissipating an electrostatic charge can be measured indirectly by measuring the surface resistance of the fabric. A more effective test is to apply an electrostatic charge to a fabric at a known voltage, and then measure the static dissipative properties by the time it takes for the voltage to decrease by a percentage of the original voltage.
.Other physical properties
Fabric performance will decrease due to ageing, wear, washing, drying and disinfection, and this phenomenon should be detected. One of the physical properties that should be considered is the fabric's resistance to chemicals such as those used in the production process, cleaning and disinfection of clean rooms and clean clothes respectively.
5. Design and production of clean clothes
. Production of clean clothes
The production of clean clothes should be able to minimize the pollution in the clean room. The fabric is cut first and then sewn, and the resulting raw edges will produce particles if not processed. These edges should be machined in the following manner: All edges of the fabric should be wrapped, staggered, heat-stamped, or laser-cut to prevent fraying, and seams should be double-stitched, glued, or taped to provide good barrier and does not produce fibers. The thread should be synthetic continuous filament thread, zippers, clips and fasteners, and laces should not be flaking or fraying, and should be able to withstand multiple washings, including multiple sterilizations when necessary.
.General Design
Cleanroom clothing should come in a wide variety of sizes to ensure comfort. To minimize trapped contamination, pockets, pleats, pencil cases, and many fasteners should be eliminated as much as possible. Elastic or braided cuffs should not trap or shed contaminants and should not accumulate static charges. Garment closures should be both airtight and comfortable. Other design parameters that should be considered are:
) Zipper material (covered clinker zipper fastener), type and location
b) Location and effectiveness of buckle adjusters and waistband
) Sleeve construction (inner or outer)
) Collar form
) Ability to wear a variety of shoes or boots
) Hood form (face exposed or hidden) , snaps or pull-on)
) Hood passive or active adjustment fit
) Type and location of bags on the boot.
6. Comfort
When choosing the materials used to make clean clothing, the comfort of workers in the clean room should be considered. The air and moisture penetration of the fabric under consideration helps determine this. Generally speaking, the higher the shielding rate of clean clothing, the less comfortable it is for people to wear it. A simple and effective method is to choose among clean clothes made of different fabrics and try them on in the clean room. Getting feedback from those who will be wearing the scrubbing suits can be valuable in making better material choices.
7. Disposal and replacement frequency of clean clothes
Clean clothes will be contaminated during use and should be washed regularly before use. Cleanroom clothing should be finalized and packaged under conditions that match or exceed the standards of the cleanroom in which it is used. Clean clothes can also be contaminated by bacteria. In clean rooms with serious bacterial problems, the cleaning cycle of clean clothes should also include steps such as hot water treatment and disinfection. After washing, sampling should be done in the laundry room to test for the type and level of contamination.
The frequency of replacement of clean clothes varies depending on the purpose of the clean room. The more sensitive the process is to contamination, the more frequently the cleanroom clothing should be changed and cleaned.
8. Storage of Clean Clothes
If clean clothes are to be reused, they should be stored or hung using techniques appropriate to maintaining the cleanliness level of the clean clothes. Use laundry bags or disposable bags to avoid cross-contamination. The following are several effective ways to store clean clothes:
) Hangers with efficient, independent, filtered air supply
b) Fixed and portable hangers with hangers
) Installed in Locking or non-locking hooks in the dressing area or on the wall or frame
) Clothes storage compartments or storage spaces.
The space for storing clean clothes for everyone working in the clean room depends on the number of people working in the clean room and the frequency of change of clean clothes. A large central area should be set up to accommodate the package number of clean clothes. For this purpose, a storage closet can be used. The storage closet should be included in the cleaning schedule to ensure that no pollution is caused. Cleaned scrubbers should be packaged in clean, non-shedding bags to avoid contamination during transportation, storage and distribution. The shelf life of disinfectant products should be specified and it is recommended that they should be stored in a controlled environment in or near the changing area. This can better control the storage volume and reduce the risk of clean clothes being taken out of the clean room and contaminated.
The above is Wuhan Jinzhifei Company’s decryption of clean room clean work clothes for you. If you have any questions, please contact us. Wuhan Jinzhifei is a company specializing in anti-static clean clothes. To buy good quality clean clothes, look for Wuhan If Jin Zhifei is looking for a purchase, please contact Wuhan Jin Zhifei. What we do is not a brand, but a sales concept with service first. When solving customer problems, we always put customers first. Whatever the customers say, we will do it until you are satisfied. Welcome to call us! !
Company name: Wuhan Jinzhifei Purification Equipment Co., Ltd.
Address: 3rd Floor, Guangtong Science and Technology Park, middle section of Jiangguo Road, Baishazhou Urban Industrial Park, Wuhan City (opposite Wuchang Railway Station, take the bus to the terminal and get off at Jiangguo Road)
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