Principle and application of plasma cleaning machine

A plasma cleaner, also known as a plasma surface treatment, is a new high-tech technology that uses plasma to achieve results that are not possible with conventional cleaning methods.

Plasma cleaning machine principle :

Plasma, like solids, liquids or gases, is a state in which matter exists, also known as the fourth state of matter. Usually, the substance exists in three states: solid, liquid , and gaseous, but in some special cases, there is a fourth state, such as substances in the ionosphere in the Earth's atmosphere . The following substances exist in the plasma state: electrons in a high-speed motion state; neutral atoms , molecules, atomic groups (free radicals) in an activated state; ionized atoms, molecules; unreacted molecules, atoms, etc., but substances in the whole It remains electrically neutral .

The plasma cleaning machine treats the surface of the sample by utilizing the properties of these active components, generates a high-energy disordered plasma by a radio frequency power source under a certain pressure, and cleans the surface of the product by plasma bombardment, thereby achieving cleaning. , modification, photoresist ashing and other purposes. In addition to the ultra-cleaning function, plasma cleaners can also change the surface properties of certain materials as needed under specific conditions. The plasma acts on the surface of the material to recombine the chemical bonds of the molecules on the surface of the material to form new surface characteristics, which not only enhances the adhesion, compatibility and wettability of the material, but also achieves the purpose of disinfection and sterilization. Plasma cleaning machines are widely used in the fields of optics, optoelectronics, electronics, materials science, life sciences, polymer science, biomedicine, microfluidics, etc.

Nine advantages of plasma cleaning and traditional wet cleaning:

v The biggest feature of plasma cleaning technology is that it can be processed regardless of the substrate type of the object to be processed. For metals, semiconductors, oxides and most polymer materials, such as polypropylene, polyester, polyimide , poly Ethyl chloride , epoxy, and even Teflon can be handled well, and can be cleaned as a whole and local and complex structures;

v Plasma cleaning is dry cleaning, no need to dry again, and the treatment efficiency is high;

v Plasma cleaning effectively avoids harm to human body caused by harmful solvents such as trichloroethane , and also avoids damage to the sample by wet cleaning;

v Plasma cleaning will not produce harmful pollutants, and it is environmentally friendly and non-polluting;

v Plasma cleaning is more complete and will not be cleaned because of the shape and angle of the cleaning sample;

v Plasma cleaning efficiency is high and can be completed in a few minutes;

v Plasma cleaning equipment is low in cost, and the overall cost is lower than conventional wet cleaning because it does not use expensive organic solvents;

v Plasma cleaning is clean and hygienic, avoiding the treatment of transportation, storage and discharge of cleaning fluid;

v Plasma cleaning improves the surface properties of the material itself. Such as improving the wetting properties of the surface, improving the adhesion of the film, and the like.

Main structure of plasma cleaning machine :

The structure of the plasma cleaning machine is mainly composed of three major parts: the control unit, the vacuum chamber and the vacuum pump. The control unit has four control modes: semi-automatic control, fully automatic control , PC computer control, and liquid crystal touch screen . The control unit is further divided into two parts of the power supply part and the system control unit. The power supply part mainly has three power supply frequencies of 40KHz, 13.56MHz and 2.45GHz; the system control unit mainly has button control (semi-automatic, fully automatic), computer control, PLC control ( liquid crystal touch screen control). The vacuum chamber is made of stainless steel or quartz. Vacuum pumps are commonly used in dry pumps and oil pumps.

Plasma cleaning machine cleaning features :

v High degree of automation, programmable to automate the entire experimental process;

v Manual and automatic working modes, which can be switched according to customer requirements;

v High control precision, the surface quality of the sample cleaning is guaranteed, and no damage layer is produced;

v US Honeywell vacuum pressure sensor, stable and reliable performance;

v US gas float flowmeter, the flow rate is accurate;

v Two-way gas control mode, gas control is more stable;

v Patented arc electrode plate design for more complete cleaning;

v The cabin, pipeline and valve body are all made of high quality stainless steel, anti-corrosion and no rust;

v No need for any consumables, low cost of use;

v No secondary pollution due to vacuum plasma cleaning;

v Maintenance-free, keep the instrument clean during daily use.

The main application areas of plasma cleaning machines :

Plasma cleaning machines have been widely used in various fields of scientific research, including materials science, optics, electronics, medicine, environmental science, biology and other fields, mainly used in the following experiments:

v Surface cleaning

v surface activation

v bonding

v Go glue

v Metal reduction

v Simple etching

v Disinfection of instruments

v Removal of surface organic matter

v hydrophobic experiment

v pre-coating treatment, etc.

First, the plasma cleaning machine in the rubber and plastics industry

In industrial applications, we have found that some rubber and plastic parts have difficulty in bonding when surface joints are used. This is because rubber and plastic materials such as polypropylene and PTFE are not polar, and these materials are not surface-treated. Printing, bonding, coating, etc. performed under the effect are very poor, and even impossible. Some processes use some chemicals to treat these rubber-plastic surfaces, which can change the bonding effect of the materials, but this method is difficult to master, the chemicals themselves are toxic, the operation is very troublesome, the cost is high, and the chemicals are for the rubber. The original excellent properties of plastic materials also have an impact. These materials are surface treated by plasma technology . Under the bombardment of high-speed and high-energy plasma, the surface of these materials can be maximized, and an active layer is formed on the surface of the material, so that rubber and plastic can be printed and bonded. Coating and other operations. The application of plasma technology to the surface treatment of rubber and plastic , its operation is simple, no harmful substances are produced before and after treatment, the treatment effect is good, the efficiency is high, and the running cost is low.

Applications in plasma surface treatment technologies include rubber, composites, glass, fabrics, metals, etc., covering a wide range of industries.

Second, plasma cleaning machine in the automotive industry

v ignition coil

With the development of the automotive industry, its performance requirements in all aspects are getting higher and higher. The ignition coil has lifting power, the most obvious effect is to improve the medium and low speed torque during driving; eliminate carbon deposit , better protect the engine, extend the life of the engine; reduce or eliminate the resonance of the engine; fully burn the fuel, reduce emissions, etc. Features. In order to make the ignition coil fully play its role, its quality, reliability , service life and other requirements must meet the standard, but the current ignition coil production process still has a big problem - after the epoxy coil is cast outside the epoxy resin, due to The skeleton contains a large amount of volatile oil on the front surface of the mold, which causes the bond between the skeleton and the epoxy bond surface to be unreliable. In the finished product, the ignition temperature rises, and bubbles are generated in the small gap of the joint surface, and the ignition coil is damaged. Serious explosions can also occur. After the plasma treatment of the ignition coil skeleton, not only the non-volatile oil stain on the surface can be removed, but also the surface activity of the skeleton can be greatly improved, that is, the adhesion strength between the skeleton and the epoxy resin can be improved, bubbles can be avoided, and the enameled wire after winding can be improved. Welding strength with the skeleton contacts. In this way, the performance of the ignition coil in various aspects of the production process is significantly improved, improving reliability and service life.

v engine oil seal

The engine crankshaft oil seal prevents engine oil from leaking from the engine and prevents foreign matter from entering the engine. The crankshaft oil seal is one of the parts of the engine and is in contact with the oil at a high temperature, so it is necessary to use a material excellent in heat resistance and oil resistance . At present, high-grade cars generally use PTFE materials. With the continuous improvement of vehicle performance requirements, more and more manufacturers have gradually used this material, and its application prospects are very extensive. PTFE material has excellent performance in all aspects, high temperature resistance, corrosion resistance, non-stick, self-lubricating, excellent dielectric properties , low friction coefficient , but untreated PTFE material has poor surface activity, one end and metal The bonding between the two is very difficult and the product cannot meet the quality requirements. In order to solve this technical problem, it is necessary to change the surface properties of PTFE (polytetrafluoroethylene) and metal bonding, and can not affect the performance of the other side. Although the treatment with the sodium solution in the industry can improve the bonding effect to some extent, it changes the performance of the original PTFE. It has been proved by experiments that after the surface of the PTFE to be bonded is bombarded with plasma, the surface activity is obviously enhanced, the bonding with the metal is firm and reliable, and the requirements of the process are satisfied, while the other side maintains the original performance, and its application is also More and more widely recognized.

vOther aspects of the automotive industry

With the development of the economy, consumers are increasingly demanding the performance of automobiles, such as the appearance of the car, the reliability of operation comfort, and the durability of use. In order to meet the requirements of consumers, each automobile manufacturer pays more attention to the optimization and improvement of details in the production of automobiles, such as the treatment of the instrument panel before the flexible polyurethane (PU) coating; the control panel before the bonding; the internal PP part vegetable Pre-treatment; handling of automotive door and window seals . In the past, the coating effect of the instrument panel or the control panel was very poor, it was not wear-resistant, and it was easy to fall off the paint. The chemical treatment can change the coating effect, but it also changes the performance of the substrate such as the instrument panel. , so that its strength is reduced. At present, many manufacturers have used plasma technology to treat these substrates. By plasma bombardment, the microscopic activity of the surface of the material is enhanced, and the coating effect can be significantly improved. According to the experiment, it is necessary to use different process parameters to treat different materials with plasma cleaning machine to achieve better activation effect.

Third, plasma cleaning machine in the electronics industry

v hard disk plastic parts

The development of science, the continuous improvement of technology, the performance of computer hard drives are also constantly improving, the capacity is getting bigger and bigger, the number of discs is increasing, and the rotational speed is as high as 7,200 rpm, which is the demand for the structure of the hard disk. The higher the connection between the internal components of the hard disk directly affects the stability, reliability, and service life of the hard disk. These factors are directly related to the security of the data. In order to ensure the quality of the hard disk, well-known hard disk manufacturers have carried out various treatments on the internal plastic parts before bonding. At present, most of the applications are plasma processing technology , which can effectively clean the surface of the plastic parts and increase the surface. The activity can improve the bonding effect of the hard disk components. Experiments have shown that the use of plasma-treated plastic parts in hard disks has a significant increase in the continuous and stable running time during use, and the reliability and impact resistance have been significantly improved.

v earphone receiver

The coil in the earphone drives the diaphragm to vibrate under the driving of the signal current. The bonding effect between the coil and the diaphragm and the diaphragm and the earphone housing directly affects the sound effect and service life of the earphone if they appear between them. When it falls off, it will break the sound, which will seriously affect the sound and life of the headphones. The thickness of the diaphragm is very thin. To improve the bonding effect, chemical treatment is used to directly affect the material of the diaphragm, thus affecting the sound effect. Many manufacturers are preparing to use new technology to process the diaphragm. Plasma treatment is one of them. This technology can effectively improve the bonding effect and meet the demand without changing the material of the diaphragm. After the experiment, the earphones produced by the plasma cleaning machine are processed, and the bonding effect between the parts is obviously improved. Under the long-term high-pitched test, there is no phenomenon such as breakage and the service life is greatly improved.

v phone case

There are many kinds of mobile phones, the appearance is more colorful and diverse, the color is bright, the logo is eye-catching, but everyone who uses the mobile phone knows that after using the mobile phone for a period of time, the outer casing is easy to fall off, and even the logo becomes blurred, which seriously affects The appearance of the phone. In order to find a solution to these problems, well-known mobile phone brand manufacturers have used chemical agents to treat the plastic case of mobile phones, and the effect of printing and bonding has been improved, but this is at the expense of reducing the hardness of the phone case, in order to seek a better solution. The solution, plasma technology stands out. Plasma surface treatment technology can not only clean the oil left by the outer casing during injection molding, but also maximize the surface of the plastic outer casing and enhance the bonding effect of printing and coating, so that the coating on the outer casing is very firmly connected with the substrate. The coating effect is very uniform, the appearance is more beautiful, and the wear resistance is greatly enhanced, and the lacquering phenomenon does not occur during long-term use.

Fourth, plasma cleaning machine in the defense industry

v aerospace electrical connector

Bonding effect between the electrical insulator and the connector body seal line has influenced the development of domestic electrical connector, in particular in the aerospace requirements for electrical connectors and more demanding, the seal line without the insulator surface-treated The bonding effect between the two is very poor. Even if the glue is specially formulated, the bonding effect is not satisfactory. In addition, if the bonding between the insulator and the sealing body is not tight, electric leakage may occur, making electrical connection. The pressure resistance of the device cannot be lifted.

At present, the manufacturers designated to produce avionics connectors in China have gradually applied plasma cleaning technology to clean the surface of the joints. Through plasma cleaning, not only can the surface oil be removed, but also the surface activity can be enhanced. Applying glue on the connector is very easy and very uniform, resulting in a significant improvement in bonding. After being tested by many domestic manufacturers, the tensile strength of the electrical connector after plasma treatment increased several times, and the withstand voltage value was significantly improved.

v Kevlar processing

Kevlar material is an aramid composite material . This new material has attracted much attention due to its low density, high strength, good toughness, high temperature resistance, ease of processing and molding. Because the "Kevlar" material is tough, wear-resistant, rigid and soft, and has the special ability to get rid of the knife, it is called "armor guard" in the military. Kevlar needs to be bonded to other parts after molding, but the material is a hydrophobic material, which is not easy to be applied. To obtain a good bonding effect, it needs to be surface treated. At present, it is mainly surface-activated by plasma. The treated Kevlar surface activity is enhanced, and the bonding effect is obviously improved. The effect of the plasma processing process is continuously optimized, and the effect is further improved, and the application range is also wider and wider.

Five, plasma cleaning machine in the medical industry

v IV infusion set

During the use of the infusion set at the end of the infusion set, there will be a detachment between the needle seat and the needle tube when the needle is removed. Once detached, the blood will flow out with the needle tube. If not properly treated in time, it will pose a serious threat to the patient. In order to ensure the occurrence of such accidents, it is necessary to surface treatment of the needle holder. The needle hole is very small, the common method is difficult to handle, and the plasma is an ionic gas, which can also be effectively treated for tiny holes. Surface activation treatment with plasma improves surface activity and improves the bond strength to the needle tube to ensure that they do not detach.

v catheter treatment

The catheter has brought good news to patients who need indwelling catheterization, and has become more and more widely used in clinical practice. However, with the increase of its application, the difficulty in removing the catheter is becoming more and more common. In particular, long-term indwelling catheters sometimes cause blockage of the balloon lumen due to aging of the rubber, which may cause serious complications when forcibly removed. In order to prevent the aging of the contact surface of the silicone rubber with the human body, it is necessary to perform oxygen plasma treatment on the surface thereof. Scanning electron microscopy (SEM), infrared spectroscopy (FTIR-ATR) and surface contact angle were used to study the surface structure , properties and chemical composition of natural latex catheter before and after oxygen plasma treatment. The results showed that after treatment with oxygen plasma The surface of the catheter became slippery, the surface contact angle was reduced from 84° to 67°, and no harmful groups were formed on the surface, indicating that oxygen plasma treatment is an effective surface treatment method. In addition, the silicone rubber can be treated with plasma to increase its surface activity, and then the surface is coated with a layer of hydrophobic material that is not aging, and the effect is also very good.

Plant Extract

Plant extracts refer to a class of substances derived from plants that have one or more biological functions. Can be separated by physical and chemical extraction of one or more effective components formed by natural products.
There are many kinds of plant extracts. At present, natural plant extracts mainly include essential oils, saponins, alkaloids, polysaccharides, polyphenols, flavonoids and so on. According to the biological activity, it can be divided into antioxidants: grape seed extract, green tea extract, pine bark extract, etc. Immune modulators: ginseng extract, gynostemma pentaphyllum extract, Ganoderma lucidum extract, etc. Improve cardiovascular function: ginkgo biloba extract, lotus seed heart extract, rhodiola extract, etc. Sedative: valerian extract, hop extract and so on.
According to their own characteristics in the market application of plant extracts can be roughly divided into six categories: coloring, seasoning, medicinal, health, dietary supplements and feed additives. Natural plant pigments refer to pigment components in roots, stems, leaves, flowers, fruits and bark of plants, such as turmeric, sappanwood, indigo, safflower, black bean and green walnut peel. Natural plant pigments are widely used in food, textiles, cosmetics, medicine, leather industry, printing and dyeing and other industries.
Plant extracts are rich in ingredients that can effectively stimulate the senses, such as sweeteners and volatile substances. Natural sweeteners, such as stevia glycoside and grosvenin, are popular new sweeteners. They are not only sweet, but also ideal substitutes for sucrose. Essential oils are concentrated volatile substances that are commonly used in the preparation of fragrances and are widely recognized in plant extracts.
Contained in the plant extracts of saponins, alkaloids, polyphenols, flavonoids and other ingredients are widely study has many biological activities, such as antioxidant, antibacterial, anti-inflammatory, improve animal production performance, antivirus, enhance immunity, etc., for human and animal health has the effect of nots allow to ignore, and the development of its pharmacology and health care function has become the main trend of plant extracts.In addition, as a dietary supplement, it is one of the main applications of various plant extracts. Such as oligosaccharides (oligosaccharides, oligosaccharides, oligosaccharides, galactose, etc.) dietary fiber, soybean protein, dietary fiber, wheat albumin, L-arabinose, sugar alcohol (xylitol, malt heavy sugar alcohol, sorbitol, etc.) and other natural plant food additives have been widely used in the food health care market. Many plant functional ingredients with anti-inflammatory, antioxidant and bacteriostatic properties are also commonly used as substitute anti-bacterial products. The application of green feed additives in livestock and poultry production has been vigorously developed, such as green tea polyphenols extract, pine bark procyanidins extract and polyanthocyanidins extract.
Due to the changes in lifestyle, working mode and consumption mode, more consumers are pursuing the life concept of "big health". The so-called "big health" refers to a concept of whole-process, comprehensive and total factor care for people's life around the basic necessities of life, life, old age, illness and death. It not only pursues individual physical and physical health, but also pursues mental, spiritual, social, environmental and family health. In the era of "great health", natural plant-based health products are the core and the key material basis.
With increasing attention to the food and drug safety, from natural plant in the development and utilization of the active ingredient is becoming more and more attention, a large number of food safety, have certain curative effect function of plant extracts have been used as raw materials in a variety of ways into functional food nutrition and health food has entered people's lives, and will play a more and more important role.
And more and more new research new discovery, predicts that the plant extract industry chain will have more members to join, there will be more business opportunities. The future domestic plant extract market will stride forward gradually to mature period!
Shaanxi Yingyuan Xingchuang Biotechnology Co., Ltd. is committed to plant extracts, advanced pharmaceutical intermediates, featured apis, and other customized research and development services; Relying on its GMP production base, it has set up a RESEARCH and development center and GMP pilot workshop to accelerate the commercialization process of production and research. The company has accumulated a number of invention patents, and has been declared by more than ten regulatory bodies such as China, FDA of the United States, EDQM of the European Union, India, Japan, South Korea and Australia. Please feel free to contact us.

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