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Principle of plasma-cleaning machine to remove glue

Principle of plasma-cleaning machine to remove glue

Operation method of plasma adhesive removal: Insert to film quartz boat and parallel airflow direction, into the vacuum chamber between the two electrodes, vacuum to 1.3 Pa, ventilation with suitable amount of oxygen, maintain reaction chamber pressure in 1.3-13 Pa, and high frequency power, produce lavender glow discharge between the electrodes, by adjusting the power, flow and other process parameters, can get different stripping rate, when the film to the net, glow disappeared. Influencing factors of plasma degumming: Frequency selection: The higher the frequency, the easier it is for oxygen to ionize to form plasma. If the frequency is so high that the electron amplitude is shorter than its average free path, the probability of collision with the gas molecule will be reduced and the ionization rate will be reduced. The commonly used frequencies are 13.56MHz and 2.45GHZ. Power influence: For a certain amount of gas, the power is large, the density of active particles in the plasma is also high, and the removal speed is fast. However, when the power increased to a certain value, the reactive ions consumed by the reaction reached saturation, and no matter how high the power, the removal rate did not increase significantly. Due to the large power and high substrate temperature, the power should be adjusted according to the process needs. Selection of vacuum degree: if the vacuum degree is improved properly, the average free path of electron motion can be enlarged, so the energy obtained from electric field is large, which is favorable for ionization. In addition, when the oxygen flow is constant, the higher the vacuum degree is, the greater the relative proportion of oxygen will be, and the higher the concentration of active particles will be. However, if the vacuum degree is too high, the concentration of active particles will decrease. Influence of oxygen flow: high oxygen flow, high density of active particles, and faster degumming rate; However, if the flow rate is too high, the probability of ion recombination will increase, the average free path of electron motion will shorten, and the ionization strength will decrease. If the pressure of the reaction chamber remains unchanged and the flow rate increases, the amount of gas extracted also increases, and the amount of active particles that have not yet participated in the reaction also increases accordingly. Therefore, the effect of the increase of the flow rate on the degumming rate is not obvious.

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Plasma processor green environmental protection process, improve the surface adhesion effect

Plasma processor green environmental protection process, improve the surface adhesion effect

Plasma processor green environmental protection process, improve the surface adhesion effect of surface activation treatment device, the role of surface hydrophilic improvement, surface activation and surface modification tools. Plasma treatment can be applied to a wide variety of materials, including metals, ceramics, composites, glass, connectors, plastics, polymers and biomaterials, as well as surfaces of various geometric shapes. Plasma cleaning machine can be widely used in surface engineering applications, including surface cleaning, surface sterilization, surface activation, surface alteration, surface wettability improvement, surface preparation for adhesion and adhesion, surface chemical modification and surface treatment. Polymers and biomaterials are surface etched and surface activated by activation, grafting and surface coating. Conventional cleaning methods do not remove the film from the surface of the material, leaving a very thin layer of impurities, and solvent cleaning is a typical example of this. The plasma cleaning machine is used to gently and cleanly scrub the surface of a material by bombarding it with plasma. Plasma cleaning will remove invisible oil film, tiny rusts and other contaminants that form on the surface as a result of user contact with outdoor exposure, etc. Moreover, plasma cleaning will leave no residue on the surface. The advantage of plasma cleaning machine is that it can not only clean the dirt on the surface, but also enhance the adhesion of the material surface. For example, the following Polymer cleaning: 1. Surface cleaning of polymer Plasma ablation mechanically removes contaminants by bombarding the surface with high-energy electrons and ions. Plasma surface cleaning removes contaminants that may be present in some processed polymers, unwanted polymer surface coatings, and weak boundary layers. 2. Surface recombination of polymers Inert gases used in plasma ablation break the chemical bonds on the polymer surface leading to the formation of free functional groups on the polymer surface. Free functional groups on the polymer surface rebond to form the original polymer structure, and can also bond to adjacent free functional groups on the same polymer chain, or chain to nearby free functional groups on different polymer chains. Polymer surface structure recombination can improve surface hardness and chemical resistance. 3. Surface modification of polymers Plasma ablation destroys the chemical bonds on the polymer surface, which leads to the formation of free functional groups on the polymer surface. Based on the chemical properties of plasma process gases, these surface free functional groups are connected with atoms or chemical groups in the plasma to form new polymer functional groups, replacing the old surface polymer functional groups. Polymer surface modification can change the chemical properties of the material surface, but the overall properties of the material do not change. 4. Surface coating of polymer Plasma coating is a thin layer of plasma coating formed on the surface of the substrate by the process of gas polymerization. If the production gases used are composed of complex molecules, such as methane, tetraffluorides, and carbon, they will break apart in the plasma to form free functional monomers, which will bond and recombine on the polymer surface to coat the film. The polymer surface coating can significantly change the surface permeability and friction. Ii. Biomaterials 1. Disinfection and sterilization: Plasma disinfection has gained a lot of recognition in the disinfection and sterilization of medical equipment. Plasma treatment has great potential in synchronous cleaning and disinfection of medical devices. Plasma disinfection sterilization is especially suitable for high temperature, chemicals, irradiation, allergic medical appliances or dental implants and equipment cleaning. 2. Improvement of adhesion force Many biomaterials have low surface energy, which makes it difficult to adhere and coat them effectively. Plasma surface activation leads to the formation of surface functional groups that will enhance the surface energy of biomaterials and improve the adhesion of interfaces. 3. Invasive Most untreated biomaterials have very weak wettability (hydrophilicity). Plasma surface treatment can increase or decrease the hydrophilicity of many different biomaterials. Through plasma activation can make the surface hydrophilic, through plasma coating film, can make the surface hydrophobic. 4. Low friction and barrier layers Some materials have high friction coefficients on ester and polymer surfaces, such as polyurethane. Plasma coating has a small friction coefficient, which makes the surface of biomaterial smoother. Plasma coatings can also form a dense barrier layer to reduce the permeability of the liquid or ga

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Knowledge of plasma surface treatment technology and plasma oxidation

Knowledge of plasma surface treatment technology and plasma oxidation

Plasma surface treatments that control the appearance of carbon fibers in just a few seconds have been developed. Compared with the existing surface treatment technology of electrolyte and aqueous solution, this new technology greatly simplifies the whole production process and reduces the energy consumption by 50%. Moreover, after plasma treatment, the basic adhesion between fiber and resin was also improved. The use of plasma oxidation technology to produce low-cost, high-quality carbon fiber is already in use in the United States. Compared with the traditional oxidation technology, plasma oxidation technology is three times faster and USES less than one third of the energy. What will happen to the gas if the temperature keeps rising? Scientists tell us that when the atoms that make up the molecule separate and form separate atoms, for example, a nitrogen molecule splits into two nitrogen atoms, a process we call molecular dissociation in a gas. If the temperature is raised further, the electrons in the atom will be stripped away from the atom to form positively charged nuclei and negatively charged electrons, a process known as atomic ionization. The ionization process occurs, and the plasma is formed. Plasma, also known as Plasma, is an ionized gaseous substance composed of positive and negative ions generated by ionized atoms and atomic groups after some electrons have been deprived. It is a macroscopic electroneutral ionized gas whose scale is larger than debby's length. Its motion is mainly controlled by electromagnetic force, and it shows significant collective behavior. Plasma surface treatment technology is widely used in the universe, and is often regarded as the fourth state of matter in addition to solid, liquid and gas, which is called plasma state, or "supergas". Materials in the plasma state have gaseous properties such as good fluidity and diffusivity. However, because the basic components of plasma particles are ions and electrons, it also has many properties different from the gaseous state, such as good electrical conductivity, heat conductivity. In particular, according to scientific calculations, the specific heat capacity of a plasma is proportional to the temperature. At high temperatures, the specific heat capacity of a plasma is often several hundred times that of a gas. The above introduction is chengfeng zhizhi years of plasma technology service experience sharing, if you want to learn about other plasma equipment content, you can call our technical service hotline or online consultation, looking forward to your call.

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What is a cryogenic plasma

What is a cryogenic plasma

99.9% of the matter in the universe is in a plasma state. Our planet is the exception to the rule. In addition, for plasma in nature, we can also list the sun, ionosphere, auroras, lightning, and so on. In the artificial plasma generation methods, gas discharge method is more simple and efficient than heating method, such as fluorescent lamp, neon lamp, arc welding, corona discharge and so on. The density and temperature values of the various major types of plasma generated naturally and artificially span nearly 20 orders of magnitude from a density of 106 (units/m3) of rarefied interstellar plasma to a density of 1025 of arc discharge plasma. Its temperature distribution ranges from 100K low temperature to 108-109K (100-1 billion degrees) of ultra-high temperature fusion plasma. The electron Volt (ELECTRON Volt) of the temperature axis is a common temperature unit in the plasma field, 1eV=11600K. Plasmas usually contain three kinds of particles: electrons, positive ions and neutral particles (including uncharged particles such as atoms or molecules and atomic groups). Let their densities be ne, Ni,nn respectively. Since the gas is quasi-neutral, the molecular density before ionization is NE ≈ NN. Therefore, we define the ionization degree =ne/(ne+nn) to measure the ionization degree of the plasma. Both the corona and the hot plasma in fusion are 100% ionized, and a plasma like this =1 is called a fully ionized plasma. Ionization degrees greater than 1%(≥10-2) are called strongly ionized plasma, like the flame plasma is mostly neutral particles (<10-3), called weak ionization plasma. If the discharge is carried out under the condition of high pressure close to atmospheric pressure, then electrons, ions and neutral particles will exchange kinetic energy fully through intense collision, so that the plasma reaches the thermal equilibrium state. If the temperature of the electron, ion and neutral particles respectively to Te, Ti, Tn, we put the three particle temperature approximately equal (Te material Ti material Tn) thermal equilibrium plasma called hot plasma, in the actual thermal plasma generator, arc discharge between cathode and anode effect makes the work flow of gas ionization occurs, it is the output of the plasma jet, can be used as a plasma jet, plasma spray flame, etc. On the other hand, low-pressure plasmas below a few hundred palas are often in non-thermal equilibrium. Now, electrons lose almost no energy when they collide with ions or neutral particles, so they have Te, >, >, Ti, Te, >, >, Tn. We call such plasmas cold plasmas. Of course, even at high pressure, the low-temperature plasma can be generated by short pulse discharge modes with no thermal effect, namely corona discharge or arc sliding jet discharge. At present, the glow discharge technology under atmospheric pressure has become a research hotspot in the world. The mechanism of producing non-equilibrium plasma at atmospheric pressure is not clear, and the research on the transport characteristics of plasma at high pressure has just begun, which has formed a new research hotspot.

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Plasma cleaner application and effect analysis

Plasma cleaner application and effect analysis

1. Printing and packaging industry Specially for UV, coating, glazing, polymer and other materials surface treatment; Put an end to all kinds of packaging box glue problem (such as toothpaste box, cosmetics box, cigarette box, wine box, electronic toy product box). Improve work efficiency, reduce grinding pollution, eliminate paper powder pollution of box pasting machine, save consumables, save glue cost (just use common water-based environmental glue). 2. Digital industry The shell of mobile phone, notebook and other digital products shall be bonded by spraying, LOGO and decorative strips, and the display screen shall be bonded for durability. Increase the adhesion of the surface treatment, prevent the digital product shell paint and keyboard text fade. 3. Automobile manufacturing industry For all kinds of car doors and Windows rubber seals, interior decoration, car lights, air conditioning outlet device of local spraying; At the same time, it is used to increase the adhesion seal of brake block, wiper, oil seal, instrument panel and engine, which has a great improvement in the process of waterproof, sound insulation and anti-shedding. 4. Hardware industry All kinds of metal steel before spraying, the surface through plasma treatment, enhance the surface adhesion. The sprayed metal extends its service life and is 20 times more resistant to wear than the untreated metal. 5. Plastics Mainly used for spraying and adhesive pretreatment, the surface of the treated product will not lose the paint, the text will not fall off and fade.

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Plasma surface treatment to improve the efficiency of automotive interior production and product yield

Plasma surface treatment to improve the efficiency of automotive interior production and product yield

Flocking on the interior surface of automobile can achieve the purpose of decoration, beauty, shock absorption and noise prevention. The plasma surface treatment is very helpful to the optimization of the process flow, production efficiency and product yield of the flocking surface treatment of automotive interior parts, and has gradually become the standard process. Car inner decoration flocking products according to its decoration parts or flocking different parts, the effect will be focused on, which can be roughly divided into two kinds: one kind is softening and adornment, make the trim look and feel, feel is more luxuriant and comfortable, such as instrument panel, pillar guard plate surface surface, door frames, door sealing strip, locker, etc; The other is shock absorption, noise reduction and heat and cold insulation functions, such as sound insulation MATS, utility boxes, central console and the back of other interior accessories. Automobile flocking interior trim general geometric shape is irregular, there are strip, plane, surface, box and so on. Traditional flocking process steps: surface treatment → grinding → gluing → electrostatic flocking → curing → cleaning. There are some disadvantages as follows: 01. Solvent glue is usually used for gluing, which is flammable, toxic and pollutes the environment. 02. The smell of the volatile substances in the base coat and solvent-based glue is unpleasant, which will cause physical harm to the operators. 03, the interior decoration is not neat, there will be flocking uneven, large area lodging and color difference and other defects. Plasma surface treatment can meet the needs of various materials and the structure of the complex flocking, car inner decoration flocking products are made with good abrasion resistance, fluffy orthostatic, adhesion, dry and wet washing resistance, cold crack resistance and hands as well as good sensibility, and can choose environmentally friendly adhesive, no pollution, reduce the health risks of staff. Depending on the product and production process, we can choose jet injection (direct jet) plasma cleaning machine, jet rotation (rotary jet) plasma cleaning machine, glow atmosphere plasma cleaning machine, 4D intelligent integrated plasma cleaning machine and vacuum plasma cleaning machine.

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