How to ensure the cleanliness and anti-static performance of the clean clothes worn in the clean room?

Dust-free clothes in clean rooms are often used in industries with high requirements for cleanliness and anti-static, such as bioengineering, medicine, semiconductors, etc. These enterprises have high requirements on the amount of dust generated in the production environment, the lower the better. . So how to ensure the cleanliness and anti-static performance of the clean clothes worn in the clean room? Here are a few suggestions from sz-pharma for reference. 1. Cleanliness guarantee of clean clothes in clean workshops The fabrics used to make clean clothes are generally ultra-clean fabrics, so how to maintain the cleanliness of clean clothes? Of course, cleaning is the most effective method. Dust-free clothing belongs to clean work clothes, and must also be cleaned and packaged in a clean room when cleaning. Usually, dust-free work clothes are washed at least once a week, and some types of work that require high cleanliness even need to be washed every day. Many people don't understand why they need to clean clean clothes in a clean room. They always think that the clothes can also be washed according to the usual laundry methods, but it is not the case. When washed in an ordinary room, the clothes can get attached with dust and bacteria, as well as be contaminated with cleaning agents. In addition, there is a risk of dust and microorganisms adhering during packing and transportation. Therefore, special methods must be used to clean clean clothes. The cleaning of clean clothes is generally carried out by professional cleaning companies. The following are the precautions when cleaning, for the reference of those in need. (1) The newly sewed clean clothes can be washed directly, and if oil stains are found in the recycled clean clothes, the oil stains should be carefully removed before the washing procedure. (2) Check the accessories such as scratches, damages and buckles before washing, and repair, replace or scrap the defective ones. (3) Cleaning, drying, and packing must be performed in a clean room with a higher degree of purification and cleanliness than a clean room using clean clothing. (4) Dry in a clean air circulation system dedicated to washing. 2. Dust-free pharmaceutical cleanroom dust-free clothing anti-static ensures that static electricity has great damage and influence on electronic products. The circuit is quite sensitive to electrostatic high voltage. When a person or object with static electricity touches these components, electrostatic discharge will occur. After the electrostatic high voltage impacts the circuit, the internal oxide film will be broken down and damaged, resulting in damage to the components or abnormal operation. Therefore, the prevention of static electricity is the key to the electronics industry that cannot be ignored. Dust and static electricity have become an important factor affecting the quality of electronic products. In order to strengthen the control of dust and static electricity in clean rooms, attention must be paid to the cleanliness and electrostatic properties of work clothes. Let's take a look at the material requirements and cleaning standard process of clean dust-free clothing. 1. The requirements for the material of clean and dust-free clothing (including hats and masks) are: (1) The amount of dust is small, and it is not easy to peel off and break the wire; (2) It is not easy to generate static electricity, and it is not easy to adhere to particles; (3) Organic resistance Solvent, cleaning resistance, steam sterilization resistance; (4) no mold. The clean dust-free clothing must cover all the hair, beard and feet in style, and can block the body shedding to the greatest extent. 2. Standard process for cleaning clean and dust-free clothing: (1) Sorting: After receiving the clean and dust-free clothing to be washed from customers, it is sorted first, and then stored in a covered plastic box to prevent aggravation of pollution. (2) Pretreatment: For some damages in the use of the clean clothes, such as button drop and other maintenance treatment. Pre-decontaminate the dust-free clothes to be cleaned. (3) Dust-free cleaning: The pre-treated dust-free clothes are cleaned by a washing machine with a special channel structure from the non-control area, and then enter the control area (clean room). In the final rinsing, antistatic agent can be used to improve the antistatic properties, but the selected antistatic agent should be well combined with the fibers, and no dust will fall off. To remove water-soluble contaminants, after washing with clean water, a final wash with distilled solvent is performed to remove oily contaminants. The water used for wet and dry cleaning should be filtered, and the solvent should be distilled after the filter membrane with a pore size of less than 0.2 μm is used at the point of use, and the filtration is performed more than once as required. (4) Dust-free drying: The cleaned anti-static dust-free clothing should be dried in a special clean air circulation system for washing (the drying hot air used is filtered by HEPA). (5) Folding inspection: After drying, fold it in a special clean room for washing, and put it in a clean polyester bag or nylon bag. It can be double-packed or vacuum-sealed as required. The packaging material is preferably antistatic. Good material. Since the folding process is the most likely to generate dust, the folding process must be carried out in a higher-level purified space. For example, the folding and packaging of a 100-level clean suit should be carried out in a 10-level environment. (6) Cleanliness test: Helmke Drum tester, which can test the cleanliness level of dust particles on the cleaned anti-static dust-free clothing (7) ESD test: ESD performance inspection to ensure the anti-static dust-free clothing. electrostatic properties. (8) Purification package: anti-static dust-free clothing that has passed all inspections,After being sealed and packaged in a vacuum bag, it becomes a qualified product and is finally delivered. The dust and static electricity in the clean room are extremely harmful to the product. The clean dust-free clothing can minimize the dust pollution of the human body and prevent the generation of static electricity. Therefore, the dust-free clothing in the clean room must be strictly tested to ensure its cleanliness and anti-static performance.

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