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Application of PMMA Surface Plasma Treatment for Ophthalmic Medical Materials

Application of PMMA Surface Plasma Treatment for Ophthalmic Medical Materials

Polymethyl methacrylate began to be used as contact lens materials in the 2040s. Because PMMA has high refractive index, suitable hardness and good biological affinity, it is still widely used. However, PMMA has poor hydrophilicity, which can cause long-term eyelid closure and discomfort to the wearer. At the same time, its oxygen permeability is poor, serious can lead to complications. If the above disadvantages of PMMA can be overcome, the efficiency of its use can be greatly improved. The surface of PMMA lens was coated with acetylene, nitrogen and water plasma polymer to improve the material's hydrophilicity and reduce the adhesion of corneal epithelial cells. The addition of organosiloxane into the interlayer of the polymer can improve the air permeability of the material, but because of the hydrophobic nature of the siloxane itself, its moisture retention is reduced. The surface hydrophobic problem of silicon-containing polymers was treated by means of glow discharge generated by vacuum ionization cleaning machine. The PMMA surface was treated by vacuum plasma MMA and polysiloxane, the carbon content of PMMA surface was decreased, the oxygen content was increased, and the moisture retention was improved. Contact lenses made of silicone rubber are called "soft" lenses. Silicone rubber has good air permeability, soft texture, good mechanical elasticity and durability. Its disadvantage is that the viscosity is too large, hydrophobic, easy to penetrate. Plasma deposition of methane film on silicone rubber surface can improve the moisture of silicone rubber, reduce viscosity, reduce liquid permeability, and maintain its air permeability.   PMMA is widely used in surgery as intraocular lens graft material, but its contact with corneal epithelial cells can lead to damage of corneal epithelial cells. Hydrophilic monomers, such as hydroxyethyl isobutenate or N-vinylpyrrolidone, can be deposited on the surface of PMMA by vacuum plasma cleaning machine graft deposition or irradiation treatment. In the experiment, the static "contact" test between rabbit cornea and lens surface showed that the PMMA surface without plasma treatment could cause 10-30% cell damage, while the treated PMMA/HEMA composite surface could cause about 10% cell damage, and the PMMA/NVP composite surface could cause less than 10% cell damage. Plasma deposition on C3F8, HEMA and NVP films can significantly reduce the damage of corneal cells. In addition, the adhesion ability of NVP membrane on PMMA surface was significantly lower than that of PMMA.

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How many intermediate relays are needed for vacuum plasma cleaning machine

How many intermediate relays are needed for vacuum plasma cleaning machine

As long as you have a little basic knowledge of power circuit, you should know the role of the intermediate relay, it is a power circuit control element, how many vacuum plasma cleaning opportunities? Let Xiaobian explain for you. The relay is composed of stator transformer core, moving transformer core, spring, moving contactor, static contactor, electromagnetic coil, plug pins, terminal board and plastic shell. Basic is similar to the action principle of intermediate relay contactor, in vacuum plasma cleaning machine control circuit, and ac contactor is different: ac contactor main breaker can carry on the operation according to the large current, and the intermediate relay circuit breaker can only be operated according to the low current, therefore, the intermediate relay contactor has certain ability to work on load, when the load capacity is small, can change the small ac contactor to intermediate relay. The use of intermediate relay to control the control loop of vacuum plasma cleaning machine, not only can have the operation target, but also can save indoor space, so that the vacuum plasma cleaning machine power control part looks more concise and beautiful. In control circuit, the intermediate relay mainly ACTS as middle data signals, complete the self-locking interlock of intermediate data signals, the advantages of vacuum plasma mechanical pump and diaphragm valves in the middle of the relay would play a self-locking interlock function, when the mechanical pump stop working, diaphragm valve will automatically shut down completely, to avoid vacuum pump failure occurs, due to reasons such as error, introduce the oily be soiled, cause the pollution of mechanical pump and internal goods. Vacuum plasma cleaning machine uses general eight intermediate relays (specific needs to see the actual demand to decide), is a large number of electronic components in the control loop of vacuum plasma cleaning machine. In the control loop of the vacuum plasma cleaning machine, although the size of the intermediate relay is small, it plays a key role in the operation part of the whole plasma cleaning machine. The eight intermediate relays in the control loop are indispensable. In order to ensure the reliability and service life of the vacuum plasma cleaning machine to get customer satisfaction, some manufacturers with better brand image will adopt the intermediate relay with better quality.

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What is the function of plasma surface processor in helmet production

What is the function of plasma surface processor in helmet production

Since 2020, the "One helmet and one belt" safety campaign has been carried out nationwide. So far, wearing helmets on electric vehicles appropriately and standard has become an important aspect of raising public transport safety awareness in cities. Although the technology content of helmet production and processing is not high in recent years, it also shows the development trend of intelligent system, high tear resistance, high toughness, lightweight, extraordinary and so on. What is the role of surface treatment technology of plasma surface processor in helmet manufacturing? The following Xiaobian and everyone to discuss with each other. The manufacturing process of the helmet includes injection molding, molding, painting, packaging and printing, assembly and other steps. The plasma cleaning mechanism key is applied before the printing process of the helmet shell. Of low temperature plasma metal surface treatment technology, may to the helmet shell selection of fiber materials and polymer materials surface cleaning, make the raw material of the helmet shell surface activation, coarsening, improved the interfacial tension of raw materials and water, to improve the printing ink adhesion strength, improve the quality of helmet packaging and printing, to make it more beautiful, more strong and durable. The role of plasma surface treatment machine through the conductive gas generated plasma technology, often contains special particles in plasma technology, these particles can react with helmet shell surface of raw materials, polymer materials such as ABS, PC, carbon fiber, so as to cut off the long molecular chain structure, raw material surface on the surface of high-energy group, in addition, the helmet shell can also by bombarding particle physics, produce micro not smooth surface of the human eye is difficult to see, to improve surface activation energy of the raw materials, improving packaging and printing performance. The plasma cleaning machine is used to treat the metal surface of the raw material of helmet shell, which has the characteristics of simple process flow, simple operation, clean and zero pollution, and can take into account the requirements of environmental protection. In addition to these, Xiaobian would like to tell you that plasma surface treatment will not destroy or change the quality of the helmet shell raw material, processing safety and high efficiency, suitable for a large number of quantified helmet shell.

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Mechanical structure and function of on-line plasma cleaning machine system equipment

Mechanical structure and function of on-line plasma cleaning machine system equipment

As a kind of precision dry cleaning equipment, plasma cleaning machine can effectively remove pollutants in the process of IC packaging, improve the surface performance of materials, and increase the surface energy of materials. Compared with the traditional independent plasma cleaning equipment, the online plasma cleaning equipment has high degree of automation, high cleaning efficiency, high equipment cleanliness, wide application range, and is suitable for large-scale fully automated production. Plasma cleaning technology has the advantages of low cost, easy to use, low maintenance cost and environmental protection. It can be used for surface treatment before chip bonding process, lead bonding and flip chip packaging process. With the deep research and wide application of plasma cleaning technology in the world, the demand for plasma cleaning equipment increases exponentially. However, plasma cleaning is still in its infancy in China. Many companies use plasma cleaning machines are basically imported from abroad. Under the monopoly of developed countries, the price of plasma equipment is relatively high. Therefore, the use of the existing mature plasma cleaning technology and equipment manufacturing base, increase equipment automation function, combining the development of conventional plasma cleaning equipment, reference of foreign equipment structure form, the fully automatic cleaning operation mode that adapted to the integrated circuit module, suitable for mass production of integrated circuit online cleaning equipment, is of great significance. The system on the basis of the mechanical structure of the plasma cleaning system, with reference to separate plasma cleaning, using automatic operation mode, can be linked to upstream and downstream production process, satisfy the requirement of the device packaging industry for mass production, thoroughly remove tiny residue and dirt particles size less than 1 um organic film, greatly improve the surface performance, improve the reliability of the welding, encapsulation, bonding and so on the follow-up process, to ensure that electronic products in the bad environment under the condition of high precision, high reliability. As a kind of precision dry cleaning equipment, on-line plasma cleaning equipment can effectively remove contaminants and improve the surface properties of materials. It has the advantages of high automation, high cleaning efficiency, high cleanliness of equipment and wide application range. On - line plasma cleaning equipment is on the basis of mature plasma cleaning technology and equipment manufacturing, increase the automatic loading and unloading function, material transfer function and other functions. The key is the lead frame in the IC package of pre-treatment cleaning, glue packaging, chip bonding, plastic sealing. While greatly improving the bonding performance and bonding strength, it can avoid the secondary contamination caused by human factors that contact the lead frame for a long time, and the chip damage that may be caused by batch cleaning in the cavity for a long time. The scheme basically meets the design requirements of automatic material handling in on-line plasma cleaning system. Compared with the traditional plasma cleaning system, it reduces the overcost of manual operation and improves the automation level of the equipment.

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Plasma cleaning machine for material surface pretreatment industry application

Plasma cleaning machine for material surface pretreatment industry application

Every process must be precisely coordinated, which is the premise to ensure high quality products. Plasma cleaning machine can meet the requirements of automotive manufacturing pretreatment process, such as the removal of manufacturing residues or silica residues through the plasma cleaning machine process. Plasma is an indispensable processing technology in automobile industry. Plasma activation can also be used in the pretreatment of material adhesives or in the pretreatment of spraying, such as plasma etching for high performance plastics and plasma coatings as bonding accelerators (primers), where consumer demand for products is increasing. Plasma cleaning machine is used to pretreat the surface of materials, which can ensure that all kinds of materials can achieve high surface activation. Durable adhesives, manufacturing surfaces that do not produce harmful substances or resist pollution, and fire-resistant coatings are just a few examples. Plasma can guarantee reliable bonding without the use of solvents, such as furniture, white goods, toys, sports equipment, etc. The manufacturing process and the quality of the materials used are important to the life and effectiveness of the module. Photovoltaic modules are often damaged due to climate change, and water infiltration will lead to a sharp decline in the performance of solar cells. Plasma pretreatment of materials by plasma cleaning machine can significantly improve the quality of solar cell modules, improve the tightness, so as to ensure the long-term stability and weatherability of modules.

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Plasma processing machine for plastic film to provide you with pretreatment solutions

Plasma processing machine for plastic film to provide you with pretreatment solutions

Believe that you are no stranger to thin film materials, optical film, composite film, plastic film, metal film, superconductor film and so on, are more common membrane materials, and the thin film material is typically preprocessing, surface treatment of low temperature plasma processor, is a new kind of pretreatment method, through the processing of plasma processor, can be carried out on the thin film material surface cleaning, activation and coarsening, thus improve the film surface tension and adhesion, some friends to pretreatment the link still don't know, let's through plastic film packaging and printing industry is a typical example, To understand the necessity of film material pretreatment. The plastic film is light and transparent, oxygen-resistant and moisture-proof, smooth and folding resistant. It has advantages in performance and price, so it can often achieve good results in modern packaging and printing. But the plastic film is a non-polar polymer material with poor wetting, ink adhesion and color fastness. If the ink is directly bonded without pretreatment, it is easy to fall off and the printing effect is poor, which affects the printing and packaging effect. In addition, the pre-treatment can also improve the subsequent plastic film coating, composite, bronzing and other processing quality. Therefore, before printing, the thin film material must be treated by plasma processor or other pretreatment methods. Now that we have a certain understanding of the pretreatment of film materials, then the more common pretreatment of plastic film is chemical oxidation treatment, corona treatment and plasma cleaning treatment. The following to introduce the pretreatment of plastic film plasma processing machine processing. Plasma processor device surface treatment method is in the process of ionization, forming active particles in plasma, react with plastic film material surface, thus destroy the long chain molecules on the surface of the membrane material, form the high-energy group, in addition, the thin film material after being bombarded with particle physics, will form the rough surface, make the surface of the plastic film material freedom can be improved, as to enhance the surface dyne value performance. Plasma processing machine low temperature plasma surface treatment process is simple, easy to operate, clean and pollution-free, in line with environmental protection requirements, and safe and efficient treatment, no damage to the film material, suitable for mass production, production environment requirements are not high.

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