In the early stage of application, the clean workshop (clean room) was called "windowless workshop" or "closed workshop", which shows that the clean workshop has very strict requirements for the setting of doors and windows and the structure of doors and windows, so as to ensure the cleanliness required by the clean room and prevent contaminants from leaking from the doors and windows during operation. To this end, in the current domestic and foreign standards and specifications for doors and windows are the corresponding provisions and requirements, these regulations and requirements mainly include:
When external windows are set up in clean rooms (areas) and personnel purification rooms, double-layer windows should be used, and should have good air tightness, and anti-condensation measures should be taken at the same time;
The doors and windows of the clean room (area) should meet the requirements of the use function, and the structure and construction gaps should adopt airtight measures;
The windows in the clean room or between different grades should not be equipped with window sills, the windows of the medical clean room should be flush with the inner wall, and the windows of the sterile clean room should be double-glazed;
Wood materials produce a large amount of dust and are easy to corrode, so the doors and windows in the clean area of medicine should not be made of wood materials, and they should be treated with anti-corrosion treatment when they need to be used, and there should be a strict covering layer;
The doors and windows of the sterile clean room (area) of the clean workshop of the pharmaceutical industry should not be made of wood;
The airtight door in the clean room should be opened towards the room with higher air cleanliness, and a door closer should be added, and an observation window should be set on the airtight door of the windowless clean room.
The door of the pharmaceutical clean room (area) should not be set with a threshold to avoid the accumulation of indoor dust in the cracks of the ground, and it can also facilitate the departure of transportation vehicles during the production process. However, if there is no threshold, it may also cause the air inside and outside the clean room to circulate through the gap between the door frame and the ground, resulting in the leakage of pollutants.
In addition, the doors and windows of the clean room should also have excellent properties such as easy to use, climate change resistance, less natural deformation, small production error, and easy to control gaps. Metal products should be used for the production of clean room doors and windows, and the sealing materials of doors and windows mainly include rubber strips, silicone rubber, sealing glue and single-sided and double-sided pressure-sensitive tapes.