Printing and Packaging Industry
Release time:2019-09-27 source:
With the development of society, the products of printing industry and packaging industry have also been improved. Large-scale printing equipment has entered the purification workshop, which can greatly improve the quality of printing products, and the qualified rate of products has also increased significantly. This is also the best integration of purification industry and printing industry. Printing mainly reflects the temperature and humidity of the product in the painting space environment, the number of dust particles, directly plays a key role in the product quality, qualified rate, and packaging industry is mainly reflected in food packaging and drug packaging two aspects of the temperature and humidity of the space environment, the number of dust particles in the air, water quality. Aspect. Of course, the standardized operation procedures of production personnel are also crucial.
Dust-free spraying is an independent closed production workshop composed of steel sandwich panels, which can effectively filter the pollution caused by bad air environment and reduce the bad rate of dust Egyptian products in the spraying area. The application of dust-free technology further improves the appearance quality of products, such as TV/computer, mobile phone shell, DVD/VCD, game machine, video recorder, PDA palm computer, camera shell, audio, hair dryer, MD, cosmetic, toys and other workpieces. Processes: upper part area manual dust removal electrostatic dust removal manual / automatic spraying drying area UV paint curing area cooling area silk printing area product inspection area receiving area.
In order to prove that the dust-free workshop for food packaging works satisfactorily, it is necessary to prove that it meets the requirements of the following criteria:
1. Food packaging dust-free workshop has sufficient air supply to dilute or eliminate indoor pollution.
2. The air in the dust-free workshop of food packaging flows from the clean area to the area with poor cleanliness. The flow of polluted air reaches the lowest level. The air flows in the doorway and indoor buildings in the right direction.
3. The air supply in the dust-free workshop of food packaging will not significantly increase indoor pollution.
4. The movement state of indoor air in dust-free workshop of food packaging can ensure that there is no high concentration gathering area in the airtight room. If the cleanroom meets the requirements of these criteria, the particle concentration or microbial concentration (if necessary) can be measured to determine that it meets the required cleanroom standards.
Testing in food packaging dust-free workshop:
1. Supply air volume and exhaust air volume: If it is a turbulent clean room, then it is necessary to measure its supply air volume and exhaust air volume. If it is a one-way flow clean room, the wind speed should be measured.
2. Air flow control between zones: In order to prove the correct direction of air flow between zones, i.e. from clean zone to poor cleanliness zone, it is necessary to detect:
(1) The pressure difference of each interval is correct;
(2) The direction of airflow movement is correct at the entrance or the opening of the wall or floor, that is, from the clean area to the area with poor cleanliness.
3. Leak detection of filters: High-efficiency filters and their frames should be inspected to ensure that suspended pollutants do not pass through:
(1) Damaged filters;
(2) The gap between the filter and its outer frame;
(3) The other parts of the filter device invade the room.
4. Isolation leak detection: This test is to prove that suspended pollutants do not penetrate building materials into the clean room. 5. Indoor air flow control: The type of air flow control test depends on the air flow pattern of the clean room - turbulence or unidirectional flow. If the air flow in the clean room is turbulent, it is necessary to verify that there is no insufficient air flow in the clean room. If one-way flow clean room, it must be verified that the wind speed and direction of the whole room is in line with the design requirements.
6. Suspended Particle Concentration and Microbial Concentration: If these tests meet the requirements, then the particle concentration and microbial concentration (when needed) are measured to verify that they meet the technical requirements of clean room design.
7. Other tests: In addition to these pollution control tests mentioned above, sometimes one or more of the following tests must be carried out: temperature; relative humidity; indoor heating and cooling capacity; noise value; illumination; vibration value.