We found some rubber-plastic parts in industrial applications in the surface connection will be difficult to bond the problem, this is because polypropylene, PTFE and other rubber-plastic materials are not polarized, these materials in the state of unprocessed surface printing, bonding, coating and other effects are very poor, and even can not be carried out.
Some processes with some chemicals on the surface of these rubber-plastic treatment, which can change the bonding effect of the material, but this method is not easy to master, the chemicals themselves have toxicity, the operation is very troublesome, the cost is also higher, and chemicals on the rubber-plastic materials have an impact on the original good performance.
The use of plasma technology on the surface treatment of these materials, in the high-speed high-energy plasma bombardment, the surface of the structure of these materials to maximize the material surface, while the formation of an active layer on the surface of the material, so that the rubber, plastic will be able to carry out the printing, bonding, coating and other operations. The application of plasma technology on the surface treatment of rubber and plastic, its operation is simple, before and after the treatment of no harmful substances, good treatment effect, high efficiency, low operating costs. 3.1.1 Ignition coil
With the development of the automotive industry, its various aspects of performance requirements are increasingly high. Ignition coil has to enhance the power, the most obvious effect is to enhance the driving of the low and medium-speed torque; to eliminate carbon deposits, better protection of the engine, extend the life of the engine; to reduce or eliminate the engine **** vibration; full combustion of fuel, reduce emissions and many other functions. To make the ignition coil to give full play to its role, its quality, reliability, service life and other requirements must meet the standards, but the current ignition coil production process is still a big problem - ignition coil skeleton outside the casting of epoxy resin, due to the skeleton in the mold before the surface contains a large number of volatile oils, resulting in a skeleton and epoxy resin Combined surface bonding is not secure, finished product use, ignition instant temperature rise, will be in the combined surface of the tiny gap in the bubble, damage to the ignition coil, serious explosion will occur.
The use of plasma treatment of the ignition coil skeleton, not only to remove the surface of the difficult volatile oil, but also greatly improve the surface activity of the skeleton, that is to say, to improve the skeleton and epoxy resin bonding strength, to avoid the production of air bubbles, and at the same time to improve the winding of enameled wire after the contacts with the skeleton of the welding strength. In this way the ignition coil in the production process in all aspects of the performance has been significantly improved, improve the reliability and service life.
3.1.2 engine oil seals
Engine crankshaft oil seals to prevent engine oil leakage from the engine and to prevent foreign objects from entering the engine internal role. Crankshaft oil seal is one of the parts of the engine, in contact with the oil at high temperatures, so it is necessary to use heat resistance and oil resistance of excellent materials. At present, high-grade cars commonly use PTFE materials, with the continuous improvement of automotive performance requirements, more and more manufacturers have been gradually using the material, its application prospects are very broad.
Polytetrafluoroethylene material has excellent performance in all aspects, high temperature resistance, corrosion resistance, non-stick, self-lubricating, excellent dielectric properties, a very low coefficient of friction, but the untreated PTFE material has poor surface activity, one end of the bonding between the metal and the metal is very difficult, the product can not meet the quality requirements. In order to solve this technical problem, it is necessary to try to change the surface properties of PTFE (polytetrafluoroethylene) and metal bonding, without affecting the performance of the other side. Although the treatment of sodium lysine solution in the industry can improve the bonding effect to a certain extent, but it changes the performance of the original PTFE. Experimentally proved, with plasma bombardment of the PTFE surface to be bonded, the surface activity is significantly enhanced, and the bond between the metal is strong and reliable, to meet the requirements of the process, while the other side to maintain the original performance, its application is also more and more widely recognized.
3.1.3 Application in other aspects of the automotive industry
With the development of the economy, consumers are demanding more and more performance of the car, such as the appearance of the car, the reliability of the operating comfort, the use of durability, and other requirements are also increasing. In order to meet the requirements of consumers, various automobile manufacturers in the production of automobiles pay more attention to the details of the optimization and improvement, such as carrying out
(1) instrument panels in the flexible polyurethane (PU) coating before treatment
(2) control panels in the bonding before treatment
(3) interior PP parts planting urethane before treatment
(4) automotive door and window sealing parts treatment
Previously, without any treatment of instrument panel or control panel coating effect is very poor, not wear-resistant, easy to drop paint and other phenomena, with chemical methods of treatment, although it can change the effect of coating, but also change the performance of the substrate such as instrument panels, so that the strength of the reduction. At present, many manufacturers have used plasma technology to deal with these substrates, through the plasma bombardment, the material surface microscopic level of activity enhancement, can significantly improve the coating effect. According to the experiment, it is known that different materials treated with plasma cleaner need to choose different process parameters in order to achieve better activation effect. 4.2.1 Hard disk plastic parts
Scientific development, technology continues to progress, the computer hard disk performance also continues to improve, its capacity is getting bigger and bigger, the number of discs increased, the speed is as high as 7200 rpm, which is the structure of the hard disk is also more and more demanding, the hard disk connection between the internal parts of the effect of a direct impact on the hard disk's stability, reliability, service life, these factors are directly related to the safety of data. These factors are directly related to data security.
In order to ensure the quality of the hard disk, the well-known hard disk manufacturers on the internal plastic parts in the bonding of the former are carried out a variety of treatments, the current application of more is the plasma processing technology, the use of this technology can effectively clean the surface of the plastic parts of the oil, and can increase the surface activity, that is, it can improve the hard disk components of the bonding effect. Experiments have shown that the use of plasma-treated plastic parts in the hard disk in the use of the process of sustained stable operation time increased significantly, reliability and anti-collision performance has improved significantly.
4.2.2 Headphone earpiece
The coil in the headset is driven by the signal current to drive the diaphragm vibration, the coil and the diaphragm and the diaphragm and the headset shell of the bonding effect directly affects the sound effect and service life of the headset, if they fall off between the sound will be produced, seriously affecting the sound effect of the headset and the life of the headset.
The thickness of the diaphragm is very thin, and to improve its bonding effect, the use of chemical methods of treatment directly affects the material of the diaphragm, thus affecting the sound effect. Numerous manufacturers are preparing to use new technologies to treat the diaphragm, plasma treatment is one of them, the technology can effectively improve the bonding effect to meet the demand, and does not change the material of the diaphragm. Experimentally, the headphones produced with plasma cleaner treatment, the bonding effect between the various parts is significantly improved, and there will be no breakage of sound and other phenomena under the prolonged treble test, and the service life has also been greatly improved.
4.2.3 cell phone shell
There are many types of cell phones, the appearance is more colorful and diverse, its bright colors, Logo eye-catching, but the use of cell phones are known, cell phones after a period of time, the shell is prone to paint, and even the Logo has become fuzzy, which seriously affects the image of the appearance of the phone.
Famous cell phone brand manufacturers in order to find a solution to these problems, has used chemicals on the plastic shell of the phone to deal with, the effect of its printing and bonding has been improved, but this is to reduce the hardness of the phone shell at the expense of the search for a better solution, the plasma technology came to the fore. Plasma surface treatment technology can not only clean the shell in the injection molding left behind oil, more can maximize the activation of the surface of the plastic shell, enhance its printing, coating and other adhesive effects, making the shell on the coating and the substrate is very firmly connected between the coating effect is very uniform, the appearance of a more bright, and wear resistance greatly enhanced, and will not appear for a long time to use the phenomenon of wear and tear of the paint. 5.3.1 Aerospace electrical connectors
Electrical connectors in the insulator and the sealing wire between the bonding effect has been affecting the development of domestic electrical connectors, especially in the aerospace electrical connectors in the more demanding requirements, without surface treatment of the insulator and the sealing wire between the body of the adhesion is very poor, even if the use of special formulations of the glue, the bonding effect can not meet the requirements; in addition, if the insulator and the sealing wire between the body of the adhesive. In addition, if the insulator and the sealing body of the wire between the bonding is not tight, it may produce leakage, so that the voltage withstand value of the electrical connector can not be raised.
At present, the domestic designated production of aviation electrical connector manufacturers, after technical research, is gradually applying the promotion of plasma cleaning technology to clean the surface of the connector, through the plasma cleaning, not only to remove the surface oil contamination, but also enhance the surface activity, so that in the adhesion, in the connector on the adhesive coating is very easy and very uniform, so that the adhesive effect is significantly improved. Tested by a number of domestic production plants, with plasma treatment of electrical connectors, its tensile strength increased several times, the pressure value has improved significantly.
5.3.2 Kevlar treatment
Kevlar material is a kind of aramid composite material, this new type of material low density, high strength, good toughness, high temperature resistance, easy to process and molding, and by people's attention. Because of the "Kevlar" material is tough and wear-resistant, rigid and flexible, with a special ability to grab the knife, in the military is called "armor guard".
Kevlar molding needs to be bonded with other parts, but the material is hydrophobic material, not easy to glue, to get a good bonding effect needs to be its surface treatment, the current main use of plasma surface activation treatment. The surface activity of the treated Kevlar is enhanced, and the bonding effect is significantly improved. Through the continuous optimization of the plasma treatment process parameters, the effect will be further improved, and the scope of application is becoming more and more extensive. 6.4.1 Intravenous Infusion Device
Infusion device end infusion needle in the process of use, pull out the needle seat and the syringe will be detached between the phenomenon, once detached, the blood will flow out with the syringe, such as not timely and correctly dealt with, the patient will pose a serious threat. In order to ensure the occurrence of such accidents, surface treatment of the needle holder is very necessary. Needle holder holes are very small and difficult to treat by ordinary methods, while plasma is a gas in an ionized state that can be effective for tiny holes as well. Applying plasma to its surface activation treatment improves the surface activity and increases its adhesive strength to the syringe to ensure that they do not detach from each other. The picture below shows a needle holder undergoing surface cleaning and activation treatment in a plasma cleaner.
6.4.2 Handling of urinary catheters
Urinary catheters have been a boon to patients who need indwelling catheterization, and have been used more and more widely in the clinic, but with the increase in their use, difficulties in catheter removal have become more and more common. Especially for long-term indwelling catheters, sometimes the aging of rubber can cause obstruction of the balloon lumen, which may cause serious complications when forcibly removed. In order to prevent the deterioration of the surface of silicone rubber in contact with the human body, it is necessary to treat its surface with oxygen plasma. Scanning electron microscopy (SEM), infrared spectroscopy (FTIR-ATR) and surface contact angle were used to study the changes in the surface structure, properties and chemical composition of natural latex catheters before and after oxygen plasma treatment, and the results showed that the surface of the catheters treated with oxygen plasma became slippery, and the surface contact angle was reduced from 84° to 67°, and no harmful groups were generated on the surface, which indicated that oxygen plasma treatment is a good way to prevent the aging of the surface of silicone rubber in contact with the human body. The results showed that the surface contact angle of the catheter was reduced from 84° to 67° after oxygen plasma treatment, and no harmful groups were generated on the surface.
Alternatively, plasma treatment can be used to increase the surface activity of silicone rubber, and then coated with a layer of hydrophobic materials that are not easy to age on the surface, and its effect is also very good. The superior performance of nonwoven fabrics makes its application range is very wide, in health care, home decoration, clothing, industry, agriculture are applied. According to different needs, nonwoven fabrics in the production and production process to be in the surface of the flame retardant treatment, burnishing treatment, splash treatment, non-slip treatment, anti-static treatment, coating treatment, antibacterial and anti-odor treatment, printing treatment, nonwoven fabrics and various textiles needle punching composite treatment, as well as nonwoven fabrics and a variety of materials (plastics, adhesive films, textiles, etc.) bonding and so on, in order to achieve a very good effect of the printing and bonding, the need for the In order to achieve very good printing, bonding and other effects, it is necessary to carry out surface treatment of the nonwoven substrate. Plasma reel-type cleaning machine is specially used for surface treatment of non-woven cables and other slender parts, the machine processing effect is good, high efficiency, suitable for mass production processing.