Application of Plasma Processer in Plastic Bottles
Because the production cost of plastic materials is low and many advantages are integrated, it has also been favored by glass packaging material manufacturers to some extent. Then what are the application and treatment functions of plastic plasma processor in plastic bottles? Plastic bottles are made of polystyrene, styrene, poly (ethyl terephthalate) and other materials. General cans are made of PVC or PET, carbonated beverage bottles are made of PET, refreshing mineral water bottles, liquid food bottles, polyethylene, detergent bottles, cosmetics bottles, milk cartons, lactic acid beverage bottles are mostly made of polyethylene. The plastic bottle material selection is mainly PP and polyethylene. PP material has low density, heat resistance, no deformation, high surface compressive strength, no toxicity, no harm, good organic chemical stability, and is mostly used for wine, sodium carbonate plastic bottle cap packaging. Polyethylene material is non-toxic, has good elasticity and impact resistance, but also easy to coating, resistance to high moisture, indoor environment stress cracking performance is better, more used for hot filling bottle stopper, cold filling bottle stopper (such as vegetable oil bottle). In daily life, in order to avoid people eating expired food, harm human health. It is common to see the barcode text on the cork or above the bottle, such as the date of birth, shelf life and so on. Some drinks are printed with certificates, letters and QR codes on the bottle stopper or bottle body for marketing purposes (e.g., award message: one more bottle). But in fact, plastic bottle surface treatment, plastic surface energy is low, poor wetting ability, high crystallinity, strong non-polar molecular chain, there are poor boundary layer and other properties. For bar code, printing ink is not easy to stick, easy to scratch, easy to fade, and if it is a drink, into the refrigerator after scraping, its test results show that this makes the manufacturer embarrassed, its quality also let consumers hit a big question mark in the heart. The plastic plasma processor relies on electromagnetic energy to form kinetic energy of high voltage and high frequency. After the kinetic energy is activated and adjusted in the spray gun tube of the plastic plasma processor equipment, the low-temperature plasma is formed in the arc discharge and sprayed to the treated surface surface by air compression, so that the surface surface touched remains super-purified and cleaned. Surface activation (introduction of polar oxygen-containing functional groups such as hydroxyl and carboxyl groups). After correct processing, plastic plasma processing machine can make the bottle stopper and bottle body to achieve a very good bar code printing effect, enhance wear-resistant, not easy to fade again.
Plasma cleaning system Plasma metal surface cleaning technology
Using low temperature plasma cleaning system, will not cause any damage to the product, and low temperature plasma metal surface cleaning technology is widely used in the change of the surface mechanical properties of metal materials, such as material wear, hardness, friction, fatigue, corrosion resistance, etc. 1, enhance the adhesion of the metal surface: After the special metal low temperature plasma surface treatment machine, the surface morphology of the material has a microscopic change, the low temperature plasma surface treatment machine to the metal material, can make the adhesion of the material surface to reach more than 70 daines value, can meet a variety of bonding, coating, printing and other processes, at the same time to achieve the effect of eliminating static electricity. 2, enhance the corrosion resistance of the metal surface: Existing plasma ferroalloy cleaning machines can improve the friction and corrosion properties of ferroalloys. Because the plasma is injected into the product from all directions at the same time, there is no size limit, so it can handle the more complex shape of the sample. Low-temperature plasma surface treatment technology is used to coat the metal surface with polyphenylene, aluminum coating and other technologies are mostly used to protect the metal surface of spacecraft. 3, improve metal hardness and wear resistance: The early research on the application of plasma immersion ion implantation mainly focuses on the surface treatment of metal materials by nitrogen plasma. The results show that the surface wear resistance of the product is improved due to the formation of TiN and CrN superhard layers. In addition to plasma dry cleaning, there are chemical cleaning. 1. Passivation processing: After being soaked by special agents, a dense passivation film is formed on the surface of stainless steel, iron and copper materials to isolate the product from space and prevent the oxidation of the workpiece surface. Characteristics: the color of the passivation film will not change the size and color of the workpiece. And the original solution is impregnated at room temperature (in addition to stainless iron, stainless iron needs to be heated). 2. Pickling passivation: What is the effect of pickling passivation? It is composed of pickling and passivation of two in one potion, also for the original liquid normal temperature soaking treatment, but not suitable for stainless steel use. After pickling and passivation, the surface of the workpiece is matte silver white. Can effectively remove weld spot.
Improvement of surface energy adhesion after plasma cleaning of atmospheric pressure plasma equipment
Atmospheric pressure plasma equipment is a kind of green dry cleaning, plasma surface treatment of materials, activate the characteristics and activity of the surface layer of materials to improve the adhesion. It is suitable for many materials in the market, including but not limited to plastics, printing paper, laminated glass, metal materials, ceramics, textiles and polymer materials. Atmospheric pressure plasma equipment is composed of plasma generator, pipe, plasma ejector, etc. The industrial production system of on-line processing is introduced. The incompatible materials can be bonded to each other, or the performance of the surface of the materials can be improved to achieve excellent bonding effect, or the electrostatic induction of the surface of the raw materials can be eliminated, so as to complete the efficient and environmentally friendly production and processing process. Atmospheric pressure plasma equipment can improve the surface energy to increase the bond energy, surface treatment can be matched with a variety of different manufacturing processes, typical production and processing including packaging printing, bonding, spraying. Surface treatment of atmospheric plasma equipment refers to the method of plasma cleaning the surface of products to improve the viscosity and adhesion force. Some specific molecules, free radicals and unsaturated bonds will appear on the surface layer of the refractory plastic under the action of the plasma of the cleaning machine. These specific functional groups can be transformed into new specific functional groups when they contact with the specific particles in the plasma. Because the specific particles in the atmospheric plasma equipment act on the surface molecular structure, the surface molecular structure of the material acts, thus improving the surface energy of the material. Plasma cleaning machine in the surface treatment of dirt at the same time, but also improve the surface characteristics of the material itself. For example, improve the surface wetting performance, improve the adhesion of printing ink, coating, coating, improve the hydrophilicity of material surface.
Plasma carbon nanotubes are modified for pollutant monitoring and treatment
Plasma modification is a new process with short treatment time, no chemical pollution, no damage to the overall volume structure of materials, and only change the surface properties of materials. In recent years, the institute of plasma of low temperature plasma application laboratory, Chen Changlun, shao dong, polly, wang and other research using the low temperature plasma technology for surface cleaning of carbon nanotubes modified assembly, overcome the carbon nanotubes from the difficult solubility limit, greatly improve the level of its practical application. Carbon nanotubes (CNTs) have been modified and assembled by low temperature plasma technology, and a series of achievements have been made in the detection and treatment of environmental pollutants. Ar/H2O,Ar/NH3 and Ar/O2 microwave plasma were used to treat the surface of carbon nanotubes, and functional groups containing oxygen and amino were introduced into the nanotubes to improve their hydrophilicity and make them into nanosolutions. These functionalized materials have a good application prospect for improving the biosorption and environmental adsorption of carbon nanotubes. Applied Physics Letter (2010, 96, 131504); Carbon (2010, 48, 939-948); The Journal of Physical Chemistry C (2009, 113, 7659-7665); Some of the results were published in Diamond & Related Materials (in press). Two oral reports were also invited to the meeting. Secondly, the surface of carbon nanotubes was activated by N2 radiofrequency plasma, and the organic monomers and natural polymers were grafted onto the surface of carbon nanotubes to prepare carbon nanotubes/organic composite. The surface of composite materials prepared by isoionization system contains a variety of functional groups, which have strong adsorption and complexation effect on persistent organic pollutants (POPs), toxic and harmful heavy metal ions, radionuclides, etc., thus improving the ability of composite materials to adsorb pollutants. Some results were published in The Journal of Physical Chemistry B (2009, 113, 860-864). Chemosphere (2010, 79, 679-685); Plasma Processes and Polymers (in press, and selected for cover). Due to the small size of carbon nanotubes (CNTs), it is difficult to recycle and reuse the organic/inorganic pollutants after adsorption. Conventional centrifugal method requires high speed, and filtration method is easy to cause filter membrane blockage, carbon nanotubes adsorbed pollutants into the environment, easy to cause secondary pollution. In order to solve the problem above, using the sol-gel method is a new type of nanometer materials, the material on the carbon nanotube assembly feng up the iron oxide, and then use N2 rf plasma activation/ferrite on the surface of carbon nanotubes, upper grafting organic monomer and natural macromolecular materials, was prepared with multiple composite magnetic nano materials, not only adsorption performance is good, In addition, magnetic separation technology can easily separate magnetic composite nanomaterials from solution, which solves the problem of difficult solid-liquid separation, and can be applied to practical work on a large scale.
Low temperature plasma treatment to improve the water resistance of wood bonding strength
Because of its excellent performance and environmental protection factors, wood-based panel plays an important role in furniture, building materials and other fields. However, the wood-based panels made of urea-formaldehyde resin glue, phenolic resin glue and melamine formaldehyde resin glue are widely used at present, which have problems such as large consumption of petroleum resources and continuous release of formaldehyde. In order to further improve the environmental protection of wood-based panel products, soybean protein adhesive (soybean gum) was modified by physical, chemical or biological methods to make the wood surface have good wettability, which has been widely paid attention in the field of wood adhesive. However, compared with aldehyde adhesives, bean adhesives still have some shortcomings in terms of water resistance, bonding strength and adhesive quantity. In order to improve the quality of wood-based board, plasma surface modification is one of the effective methods to improve the wettability of glue on board surface. A large number of polar oxygen-containing functional groups can be formed on the surface of poplar veneer under oxygen RF plasma treatment, and the surface roughness is improved, which is beneficial to adhesive bonding. Using atmospheric pressure air dielectric barrier discharge plasma technology to treat veneer surface simplifies the process and creates conditions for industrial application. The parameters such as plasma treatment speed and power have obvious effects on the physical and chemical properties of the sheet surface. Wood was modified by atmospheric plasma to improve its surface wettability. Using nanocellulose (NCC) modified soybean glue as binder, the surface of poplar veneer was treated by atmospheric pressure air dielectric barrier discharge plasma to prepare soybean glue plywood. After atmospheric plasma treatment, the wood surface was etched, and a large number of polar functional groups were produced, which improved the wettability of the glue on the wood surface, thus increasing the bonding strength of the wood, and further reducing the amount of adhesive. On the one hand, the surface of poplar veneer is physically etched and micro-nano pores are produced after plasma treatment, which is beneficial to the penetration of modified soybean gum into the veneer surface. On the other hand, the high-energy particles generated by the atmospheric low temperature plasma make the surface of poplar veneer change chemicly, produce more polar functional groups containing oxygen and nitrogen, improve the polar interaction between the glue and wood, and make the glue more easily penetrate into the pores of the veneer surface, forming a deep nail structure. Therefore, the interfacial bond strength of the plywood treated by low temperature plasma can be significantly improved, and the bond strength of the plywood treated by low temperature plasma can reach 0.78MPa, which is increased by 20% and reaches the national standard. This indicates that the normal pressure and low temperature plasma treatment can reduce the amount of glue and reduce the production cost under the condition that the bonding strength reaches the standard. The high energy particles in the plasma impact the wood surface at high speed and degrade the polymer in the wood cell wall. These small irregular scratches on the surface of poplar increased the surface roughness, promoted the penetration of modified bean gum into the surface of poplar veneer, and increased the interfacial bonding strength. The surface of poplar veneer was etched to form a microporous structure, and the surface roughness of veneer was increased, which improved the permeability of nano-cellulose modified soybean gum. After treatment, new free radicals were generated on the surface of poplar veneer, which enhanced the polarity between modified bean gum and veneer surface.
Plasma surface treatment equipment PCB and polymer material surface treatment effect
Plasma is formed by applying electric field to low-pressure gas for glow discharge, which can modify the surface energy of polymer materials such as PTFE. Plasma surface treatment equipment is widely used in PCB(printed circuit board) hole metallization pretreatment, polytetrafluoroethylene and other materials bonding pretreatment and PCB surface activation treatment. It can replace the traditional sodium naphthalene solution immersion, and provides a fast, convenient and clean treatment method for the surface activation of PTFE and other substrates. The system software of plasma processing equipment mainly consists of PLC control program and computer monitoring software. When the system runs automatically, the operator sets the control parameters, and then presses the automatic button to enter the automatic control monitoring interface. PLC can send all kinds of control commands, at the same time can collect all kinds of real-time data of PLC, to achieve the whole process of production monitoring. The plasma processing system also has the function of real-time alarm and historical data preservation. PLC software is used to realize all the control interface tasks of the equipment. Its design idea is based on saving the hardware investment as much as possible, replacing the hardware with software and improving the software efficiency for programming. PLC program powerful, flexible configuration, outstanding performance, including the bit logic counter timer, mathematical operation and other intelligent control module, can monitor the input state, change the output state, to achieve the purpose of control. In practical application, the plasma processor system runs normally, the performance is stable and reliable, the interface is friendly, the user can simply monitor the process flow and parameter setting, and the efficiency is improved. The plasma surface treatment equipment has obvious surface treatment effect on PCB and polymer materials, and can significantly improve the adhesion, hygroscopic and adsorptive properties of materials. Compared with the traditional control method, the plasma processor has the advantages of good real-time performance, simple operation, stable and reliable performance. The design of plasma treatment system not only improves the production efficiency of PCB manufacturers and brings good economic benefits to enterprises, but also improves the automation level of the system to a great extent, which can provide reference for the design of other systems.
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