How to keep the clean room as clean as possible?
Updated: Nov 17, 2022
As we all know, dust-free workshops have very high requirements for the environment, but it is still difficult to ensure that there are no impurities in the dust-free workshops, so we should do our best to clean the workshops, so we should learn to reasonably control pollution sources. What should we do specifically?
Dust free workshop, also known as clean workshop, clean room and dust-free workshop, refers to a specially designed room that eliminates pollutants such as particles, harmful air and bacteria in the air within a certain space range, and controls indoor temperature, cleanliness, indoor pressure, air flow velocity and distribution, noise, vibration, lighting and static electricity within a certain demand range. That is to say, no matter how the external air conditions change, the interior can maintain the performance characteristics of cleanliness, temperature, humidity and pressure originally set.
Here are the cleaning requirements and precautions for the dust-free workshop:
(1) wipe the columns and support columns under the raised floor once every three months;
(2) Use 90% deionized water and 10% isopropanol to prepare cleaning agent;
(3) Wipe the floor after you have sucked it. Wipe the wall once a week;
(4) Check the garbage bins in the workshop and servicing room every day and remove them in time;
(5) Special vacuum cleaners with high-efficiency filters shall be used for dust collection in clean rooms;
(6) Every floor should be vacuumed. During each shift change, the completion of the work shall be indicated on the map, such as where to end and where to start;
(7) Dust and wipe under the raised floor;
(8) Use approved special detergent for clean room;
(9) When working, you must remember to always wipe from top to bottom, from the farthest place from the door to the door;
(10) Special mops shall be used to clean the floor of the clean room;
(11) All doors shall be inspected and dried;
(12) Clean room dust-free cloth shall be used when cleaning the walls in the clean room.
The control of pollution sources in dust-free workshops the maintenance and control of cleanliness in dust-free workshops need not only the matching investment of hardware and equipment, but also good software management systems to maintain good cleanliness. According to the test and analysis results of pollution sources in the dust-free workshop, operators account for about 80%. When operators enter and leave the dust-free workshop, the pollution sources in the dust-free workshop can be divided into external pollution and internal pollution. External pollution sources mainly include air supply from air conditioners, gap infiltration, buildings, work clothes, and general gases such as N2, O2, air, water supply, solvents, etc; The internal pollution sources include production equipment, staff, tools, processing and manufacturing, compartment materials, workbench, packaging materials, etc. All dust-free cloth manufacturers should not only use dust-free materials, such as dust-free cloth and dust-free clothes, but also strengthen the management of personnel in and out of the dust-free workshop to play its due role.
1、 Maintenance and management of hardware facilities in the dust-free workshop.
Keep proper positive pressure (> 0.5mmAq) in the dust-free workshop, do a good job in preventing air leakage in the construction project, clean and wipe personnel, equipment and raw materials before moving into the dust-free workshop, and properly manage and set air filters.
Prevention of indoor dust generation: proper selection of materials for dust-free workshops such as partition boards and floors, dust suppression of manufacturing equipment, production automation and non-gathering of personnel, relaxation of actions, management of clean clothes, use of special equipment for dust-free workshops, etc.
No accumulation of indoor dust: the wall should be smooth without dead corners, the dust-free workshop should be regularly maintained and cleaned, and there should be space around the process equipment.
Remove the dust immediately.
2、 The largest control object of cleanliness maintenance in the clean workshop is the operators. Therefore, the number of operators, their action status, the formulation and implementation of entry and exit rules should be improved, and the cleanliness awareness of operators in the clean workshop should be improved and repeatedly educated.
Personnel entering the dust-free workshop must have the ability to reach high cleanliness standards and maintain the best condition.
The number of operators entering the dust-free workshop shall be kept to a minimum (the less the better), and they shall enter and exit the dust-free workshop according to the standard procedures for entering and leaving the dust-free workshop.
3、Management of materials entering and leaving the dust-free workshop
The entry and exit of materials and equipment must also go through the cleaning process, so as not to affect the cleanliness of the dust-free workshop.
The staff must wear clean clothes when cleaning equipment or materials in their rooms. The wiping paper used is dust-free paper or dust-free cloth that will not shed wool. In addition to using ultra-pure water, the cleaning agent is added with 3-5% concentration of IPA or acetone chemicals to enhance the decontamination ability. Because IPA and acetone are volatile, the exhaust effect of this room must be specially considered.
In addition to the clean clothes, shoes, hoods, hats, gloves and masks used in and out of the clean workshop, the articles in the clean workshop also include paper stationery, tables, chairs, chip boxes, carts, notebooks, notice boards, garbage bins and vacuum cleaners. The basic condition for the materials of clean clothes is that they will not generate dust after washing or using other treatments, and the fabrics are non-combustible and non-hairy, and the weaving method or fabric structure are not easy to pass through pollutants and non- adhering pollutants. In addition, they will not generate static electricity or have very small electrification after friction, and are easy to wash and regenerate, not easy to wrinkle, and comfortable to wear. The head cover is made of dust-free paper or non-woven fabric, and the hat is made of the same material as the clean clothes. When wearing the two, except for the eyes and face surface, other parts need to be covered. The head part connected to the coat must also be fully covered, and no gap can be left, and the head hair cannot be exposed. Shoes for dust-free workshops should be fit and comfortable to wear.