Scope of application
The plasma cleaner cleaning machine is mainly used in the pre-processing of mobile phone case printing, coating, and dispensing in the electronics industry, the surface treatment of mobile phone screens, the surface cleaning of connectors, and the pre-processing of screen printing and transfer printing in general industries.
There are two key to the reaction between the plasma of the atmospheric pressure plasma surface treatment machine and the surface of the substance, one is the chemical change caused by free radicals, and the other is the physical reaction caused by the plasma.
1. Chemical reaction
The gases generally used for chemical reactions include hydrogen (H2), oxygen (O2), carbon tetrafluoride gas (CF4), etc. This gas reacts in the plasma of the atmospheric pressure plasma surface treatment machine as highly active free radicals, and interacts with The surface layer of the material reacts further. Its mechanism is mainly to use the free radicals in the plasma to produce chemical changes on the surface of the material. When the working pressure is very high, the free radical activity is high and the movement is intense. Therefore, if the chemical changes are to be dominant, a great deal of manipulation is required. Only work pressure can carry out a close response.

2. Physical reaction
Using the ions in the plasma as a purely physical impact, the plasma cleaner mainly knocks off the molecules on the surface of the chemical substance or the molecules on the surface of the chemical substance. Because the ions are at a low working pressure, their average free radicals are relatively light. It is long and has a certain accumulation of kinetic energy. Therefore, in a physical impact, the higher the kinetic energy of the ion, the more molecules it impacts. If you want to take the physical reaction as the leading factor, you need to carry out the reaction under a lower working pressure to make the actual cleaning The effect is stronger. The principle of the plasma cleaning machine is based on the "active effect" of the active particles in the plasma to achieve the goal of removing dirt. Plasma cleaning generally includes the following processes: agitating inorganic gas into a plasma state; absorption of gas-phase substances to the solid surface; reaction of absorption functional groups and solid surface molecules into product molecules; analysis of the product molecular structure into gas phase; reaction residues Get rid of the surface. The major feature of the plasma cleaner technology is that it does not need to distinguish the types of objects to be cleaned. For metal materials, semiconductor materials, metal oxides, and most fiber materials, such as polypropylene, polyester, polyimide film, and polyimide film, there is no need to distinguish between the types of objects to be cleaned. Ethylene chloride, epoxy resin, and even polytetrafluoroethylene, etc., can be processed to obtain corresponding effects, and can carry out overall, partial and complex structure cleaning.
Plasma cleaning machine plasma cleaning connector aviation application
At present, many related products will use plasma cleaners for surface treatment. Aerospace connectors are one of them. Chengfeng Zhizao has accumulated rich experience in this area.
High-precision fields such as aviation and aerospace generally have higher product requirements, and plasma cleaners are required to perform surface treatment on connectors and some metal parts. Next, take the connector as an example to introduce the related processing technology of plasma cleaning connector in aviation and other fields.
Generally, the connectors used in aviation and other fields are relatively small, mainly including fluorosilicone rubber FVMQ connectors, thermoplastic polyester PBT connectors, polyphenylene sulfide plastic PPS connectors, polyether amide PEI connectors, etc., for bonding and printing The requirement of plasma cleaning machine is high. The original wiping and special glue bonding are replaced by plasma cleaning machine pretreatment, which can not only meet the environmental protection requirements, but also improve the reliability and consistency of the treatment.