Introduction to low temperature plasma surface treatment technology
The energy of particles in low temperature plasma is generally about several to ten electron volts, which is larger than the bond energy of polymer materials (several to ten electron volts), and it can completely break the chemical bonds of organic macromolecules and form new bonds. However, it is much lower than high-energy radioactive rays and only involves the surface of the material without affecting the properties of the matrix. In the low temperature plasma in the non-thermodynamic equilibrium state, the electrons have high energy, which can break the chemical bonds of the molecules on the surface of the material and improve the chemical reactivity of the particles (greater than that of the hot plasma), while the temperature of the neutral particles is close to room temperature. These advantages provide suitable conditions for the surface modification of heat-sensitive polymer polymers. Through low temperature plasma surface treatment, a variety of physical and chemical changes occur on the surface of the material, or produce turbidity-etching and rough, or form a dense cross-linked layer, or introduce polar groups containing oxygen, so that the hydrophilicity, cohesiveness, chromability, biocompatibility and electrical properties are improved. When the material surface is treated under the appropriate technological conditions, the surface morphology of the material changes significantly. A variety of oxygen-containing groups are introduced to make the surface change from non-polar, difficult viscosity to a certain polarity, easy viscosity and hydrophilicity, which is conducive to bonding coating and printing. The air between the two electrodes generates gas glow discharge by applying AC high frequency and high voltage to the two electrodes. The electrons constantly collide with the gas molecules during their movement, producing a large number of new electrons. When these electrons reach the anode, they gather on the surface of the medium to modify the surface
Plasma cleaning applications
Aviation industry
With the development of the aviation industry, manufacturers are looking for products with longer life spans, more reliable quality and lower costs. In the past, the coating and stripping strips on aircraft were made of aluminum alloy, but now, these parts are mainly made of carbon fiber reinforced plastics. Plasmas play a big role in this. It is the carbon fiber reinforced plastic surface stability is better, so that the bonding and spraying process is more perfect
Metal industry
Whether it is from the metal ornaments in our clothes or the metal tables and chairs used in our homes, the surface may be treated by plasma. Nowadays, people have higher and higher taste for the design of products. Manufacturers in order to meet the needs of consumers will produce a variety of beautiful and durable metal products to attract the market, it can be said that plasma surface treatment of materials has infiltrated into our lives, nearly 30 years, low temperature plasma is widely used to change the mechanical properties of the surface of metal materials, plasma surface treatment of metal is:
1. The friction and corrosion resistance of iron and steel alloys can be improved by ion beam nitrizing 2. The metal surface can form metal solid solution and sediment, so the hardness and wear of metal materials can be improved
Medical industry
Medical materials refer to inanimate materials used in contact with biological tissues to form functions. They are very good auxiliary materials in medical treatment, including polymer materials, metals, ceramics, glass or composite of various materials, etc., which are widely used in artificial organs, surgical repair, dental materials, cladding materials, orthopedic devices and medicine. Functional and mechanical properties, these materials are very good, but good biocompatibility is also quite critical, using plasma surface modification method can make them good compatibility, plasma only on the surface of a thin layer of treatment, does not change the performance of the material, and sterilization effect. So plasma surface treatment is becoming more and more widely used in medical materials.
Household appliance industry
Surface coating, spraying and bonding processes of daily necessities and household appliances. Plasma pretreatment can improve the bonding and coating quality of products
Plastic industry
Plastic, rubber, metal and other pretreatment before bonding, improve the surface adhesion, mobile phones, computers, toys and other plastic shell spray pretreatment, improve the surface adhesion
Packaging industry
In the field of printing and packaging applications, perhaps in the plasma surface treatment before what is not much known to the public, in fact, we very early began to use corona discharge, flame treatment surface modification method, that is, the most common form of discharge in the ionosome - dielectric barrier discharge (DBD) but now low temperature plasma processor has been widely used in the packaging industry, Change the printability of the packaging surface and the adhesion of the composite surface, plasma processing function for UV, coating, glazing, polymer and other materials surface treatment; Professional improve coated paper, glazed paper polishing, gold and silver card, aluminum plated paper, UV, OPP, PP, PET and other color boxes, color box surface paste box fastness; Eliminate all kinds of packaging box opening problem. Improve work efficiency, reduce grinding pollution, eliminate paper powder pollution of box paste machine, save consumables, save glue cost.
Precision glass
Photoelectric glass and electronic industry applications
All kinds of glass surface cleaning, improve the glass surface hydrophilicity, optimize the glass coating, printing, bonding and spraying technology;
Flexible and non-flexible printed circuit board contact cleaning, LED fluorescent lamp "contact" cleaning and improve the surface adhesive firmness;
Electronic components PCB cleaning, IC surface cleaning, activation enhancement binding, etc.;
Plasma cleaning before laminating LCD terminal surface;
Electronic industry
Electronic components processing of plasma pretreatment PCB cleaning, electrostatic LED support IC surface cleaning and bonding
Automobile industry
EPDM rubber strip spray lubrication coating or flocking glue pretreatment process; Plasma surface pretreatment technology is used for car headlight bonding, brake pad wiper, hood, instrument and bumper
plasma cleaner (plasma cleaner), also known as plasma surface treatment instrument, is a new high-tech technology, the use of plasma to achieve the conventional cleaning method can not achieve the effect
Plasma cleaning machine has the following nine advantages:
First, the cleaning object is dry after plasma cleaning, and it can be sent to the next process without drying. Can be the processing efficiency of the whole process line;
Two, plasma cleaning machine enables users to stay away from harmful solvents to harm the human body, but also avoid the problem of wet cleaning is easy to wash the cleaning object;
Three, avoid the use of trichloroethane and other harmful solvents, so that there will be no harmful pollutants after cleaning, so this cleaning method belongs to the environmental protection of the green cleaning method. This becomes more and more important in the context of global concern for environmental protection;
Fourth, the plasma generated by the high frequency of the radio wave range is different from the direct light such as laser. Plasma is not very directional, which allows it to reach deep into the tiny holes and dents of an object to complete its cleaning task without much concern for the shape of the object being cleaned. And the cleaning effect of these hard-to-clean parts is even better than that of freon cleaning;
Five, the use of plasma cleaning machine, can make the cleaning efficiency can be greatly improved. The whole cleaning process can be completed in a few minutes, so it has the characteristics of high yield;
Six, plasma cleaning need to control the vacuum degree is about 100Pa, this cleaning condition is easy to achieve. Therefore, the equipment cost of this device is not high, and the cleaning process does not require the use of more expensive organic solvents, which makes the overall cost lower than the traditional wet cleaning process;
Seven, the use of plasma cleaning machine, avoid the cleaning liquid transportation, storage, discharge and other treatment measures, so the production site is easy to keep clean and sanitary;
Eight, plasma cleaning machine can be regardless of the treatment of objects, it can deal with a variety of materials, whether it is metal, semiconductor, oxide, or polymer materials (such as polypropylene, polyvinyl chloride, polytetrafluoroethylene, polyimide, polyester, epoxy resin and other polymers) can be used to deal with plasma. Therefore, it is especially suitable for materials that are not heat resistant and solvent resistant. It can also selectively clean the whole, part or complex structure of the material;
Nine, in the completion of cleaning decontamination at the same time, but also can improve the surface performance of the material itself. Such as improving the wettability of the surface, improving the adhesion of the film, etc., which is very important in many applications.
1. What does plasma surface processor (cleaning machine) do?
Plasma surface processor uses current to generate normal temperature plasma to act on the tongue surface of various packaging such as toothpaste box, cigarette box, wine box and gift box. After processing and gluing, there will be no ungluing problem, and you can paste the box with ordinary glue, greatly reducing the cost of glue.
Is your company using a fully automatic box paste machine? The plasma surface processor can be used together with the box paste machine.
What are the products of plasma surface processor?
A: Currently on the market is the common single nozzle plasma surface processor. And our company has developed a number of products such as double nozzle, three nozzle, rotating nozzle, etc. Our professional R & D team can also specialize in R & D and production according to customers' needs.
Main functions and advantages of plasma surface processor?
A: 1. Spray plasma flow is neutral, can be a variety of polymer, glass, metal, semiconductor, rubber, PCB circuit board and other materials for surface treatment.
2. Plasma surface processor after treatment to remove hydrogen carbide dirt, such as grease, auxiliary additives, is conducive to bonding, durable and stable performance, long retention time.
3 plasma temperature is high and low, for different materials to choose different temperature plasma, (power size can be adjusted) suitable for those surface materials sensitive to temperature products.
4. Every type of atmospheric pressure equipment has on-line function! Can be directly installed on the production line, with field equipment online operation processing! Relative to the reverse operation of edging machine, greatly improve the work efficiency.
5. Only air and electricity are consumed, so the operation cost is low and the operation is safer.
6. Dry method treatment without pollution, no waste water, meet the requirements of environmental protection; And replace the traditional edging machine, put an end to the impact of paper powder paper wool on the environment and equipment.
7. After plasma surface processor treatment, ordinary glue can be used to stick the box, reducing the production cost. Plasma processor introduction: plasma technology is a good solution to the coated paper, glazing paper, coated paper, aluminum plated paper, UV coating, PP, PET and other materials bonding is not strong, or unable to bond the problem. To solve the problem that many enterprises used to use the traditional local coating, local glazing, surface grinding or cutting paste line, the use of special glue to improve the bonding method.
Plasma technology after the use of ordinary water-based glue can be very good bonding, no longer because of different cardboard and replace different glue. Not only effectively solve the paste box, paste box production process problems, but also have a good guarantee for the enterprise's process, efficiency, quality.
Selective surface modification can be achieved by plasma processing:
1. Activation: greatly improve the wettability of the surface, forming an active surface
2. Cleaning: Remove dust and oil, fine cleaning and electrostatic remove
3. Coating: A functional surface is provided by a surface coating treatment
4. Improve the adhesion ability of the surface
5. Improve the reliability and durability of surface bonding
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