China Xiamen Juguangli Import & Export Co., Ltd Company News

Rubber materials, with their superior properties, are increasingly being approached by businesses, especially in terms of compression resistance, heat resistance, and so on. The special components contained in high-temperature resistant rubber can provide good performance in the power industry and also play an important role and trend. Low phenyl silicone rubber not only has unique cold resistance and low cost, but also is a type of low temperature resistance, widely used in the aerospace industry today. According to the different content of benzene, it can be divided into medium phenyl silicone rubber, high phenyl silicone rubber, and low phenyl silicone rubber. Due to the increase in phenyl content, the rigidity of high phenyl silicone rubber gradually increases, and its low-temperature resistance gradually decreases. However, to a certain extent, it improves the flame resistance and radiation resistance of the vulcanized rubber. And medium phenyl silicone rubber has good flame resistance and can automatically extinguish after ignition. This high-temperature resistant silicone rubber is one of the important materials for advanced technology, national economy, and aerospace industry. It can be made into various molded and extruded products for use as cold resistant rubber in the aviation industry. It can also be used for sealing rings, gaskets, pipes, and bars in radiation resistant parts, or in areas such as erosion resistance and heat aging resistance. So it's natural for people to come into contact with such products, and we also believe that rubber products will continue to progress and gradually enter thousands of households, making contributions to more industries. http://mao.ecer.com/test/siliconerubber-keypads.com/sale-22036759-shock-proof-and-shock-absorbing-silicone-rubber-feet-pad-for-washing-machine.html

General silicone rubber products and metal adhesion is not good, are required to be treated on the metal surface   1, metal surface treatment: In order to obtain the best bonding effect, the metal surface must be clean and pollution-free. With 200-400 micron steel sand or brown corundum for sandblasting treatment, until the metal surface is gray. Recommended products: Hardware bag rubber   2. After sandblasting, degreasing with solvent to remove grease. Cold rolled steel is usually treated with steel sand, stainless steel, aluminum, copper, etc., with brown corundum (aluminum oxide). Phosphating can also be used.   Summary: Make holes, knurls, grooves in the bonding area, and use adhesive Kemlock (dry for 20 to 30 minutes). About the adhesive coating process, I think everyone should be very clear, really do not know can go to ask about the use of Chemlock, their company will teach you to use the treatment agent and the use of methods.

Over the past few decades, the range of heat-resistant rubber products has been expanding, because:   First, some traditional products did not require heat resistance in the past, and with the change of use conditions, heat resistance requirements have been put forward. A classic example is tires. Due to the acceleration of the vehicle speed, the rolling heat generation rises sharply, and improving the heat resistance is the threshold that must be crossed. Other rubber products have a similar situation.   Second, the contact between rubber products and various thermal media (such as various lubricating oil, brake oil, working media and hydraulic oil) increases, and the temperature is also much higher than normal temperature.   Third, in order to comply with the heat resistance needs of the rubber industry itself in processing, such as tire vulcanization of water tires, capsules need to be used at a temperature of 170°C ~ 180°C for a long time, continuous vulcanization of extruded products must be carried out at a high temperature of more than 200°C, they must have heat resistance and anti-retrograde characteristics.   The formulation design of heat-resistant rubber involves the correct selection of the main material, vulcanization system, protection system and anti-retrograde agent, as well as the coordination between them.

Fluorine silica gel has outstanding high temperature resistance, oil resistance, especially resistance to double ester oil, chemical resistance, good physical and mechanical properties, satisfactory dielectric properties, non-flammability, weather resistance, excellent vacuum properties, radiation resistance; It can usually be used for a long time at 275℃ and for a short time at 320℃. Oil resistance, acid resistance is better than 1# glue; Weather resistance, ozone resistance, radiation resistance, gas permeability and electrical properties and fire resistance are similar to 2# adhesive. It is widely used in aerospace, automobile, machinery, petrochemical and other fields. For example, it is used as a dynamic and static sealing material for hydraulic systems and lubrication systems of aircraft; Used as sealing materials for oil fields, oil cables and pipelines for oil fields and drilling equipment; The chemical industry is used as the lining of equipment, pipeline flexible connections, pumps, etc., or as a corrosion-resistant sealing material, and is made of pipes to transport or organic solvents or other corrosive media.   Compared with methyl vinyl silicone rubber, fluorine silicone rubber has excellent oil resistance, solvent resistance and chemical resistance. Even compared with fluorine rubber, oil resistance and solvent resistance are good. After impregnation in the same medium, temperature and time, it shows excellent durability, it can be said that fluorosilicone rubber is the only kind of elastomer resistant to non-polar media at -68℃ ~ 232℃. The resistance of fluorine silicone rubber to methanol containing gasoline is also relatively good, even in the gasoline/methanol mixed system, the hardness, tensile strength, volume changes of its vulcanized rubber are very small, after 500h long time impregnation test, the physical properties are almost unchanged.   The high-temperature decomposition of fluorine silica gel is the same as that of silicone rubber, that is, side chain oxidation, main chain fracture, side chain thermal decomposition and causing various complex reactions. Since the decomposition products can also cause the main chain to break, the heat resistance is usually worse than that of silicone rubber, and oxidation aging has begun at a temperature of 200 ° C. However, by adding a small amount of heat stabilizer such as iron, titanium, rare earth oxides, it can be significantly improved, and it has sufficient heat resistance even at 250℃ high temperature. The effect of temperature on fluorosilicone rubber is larger than that of silicone rubber, but smaller than that of fluororubber.   The weather resistance of fluorine silica gel is very good, even after 5 years of exposure, it still has good performance. Ozone is one of the most formed gases during the aging of elastomers, but no cracking or cracking phenomenon was found in fluorosilicone rubber after dynamic or static tests. In addition, fluorine silicone rubber mildew resistance, physiological inertia, anticoagulation is also very good. Fluorine silicone oil is resistant to olive oil, safflower oil, makeup remover oil, lubricating oil, brake oil, hydraulic oil and other inorganic, organic, polar, non-polar oils, no expansion, no contraction, stable size, oil resistance effect lasts a long time.   Fluorine silica gel is mainly used for the preparation of heat, oil and acid resistant rubber products. Such as seals, hoses, rubber pads and so on. The product can be used for a long time at 250 ° C and for a short time at 300 ° C. Its oil resistance is better than other varieties of fluorine rubber, and it can be used for parts that need oil resistance. Examples are as follows: Used as "○" ring, V-type sealing ring, oil seal bowl with metal skeleton, valve gasket, etc. These sealing materials can work for a long time at 200 ~ 250 ° C and for a short time at 300 ° C. In the petroleum industry: F26 rubber seals are used in drilling machinery refining equipment, natural gas desulfurization equipment, can withstand high temperature, high pressure, oil and strong corrosive media and other harsh conditions. In the chemical industry: F26 seals are used in pumps, pipe fittings and equipment containers to seal chemical substances such as inorganic acids and organics. In terms of building materials manufacturing: F26 can be used as cement single bin pump sealing rubber ring, which is about 10 times longer than the sealing ring made of natural rubber.

Glass screen printing has been widely used in China, due to the wide variety of ink on the market, the glass matrix also has its diversity, the printing process often has some problems. The following is a summary of the problems in the process of glass screen printing, and the solution to the problem of glass screen printing.   First, paste plate:   Paste plate, also known as blocking plate, refers to the phenomenon that the through hole part of the screen plate can not transfer the ink to the substrate in the printing. The appearance of this phenomenon will affect the printing quality, and even the normal printing will not be possible in serious cases. The reasons for the phenomenon of pasting produced in the process of screen printing are complicated. The reasons for paste can be analyzed from the following aspects: (1) The reason for the glass: the glass surface is not treated clean, and there are watermarks, paper prints, mimeograph prints, handprints, dust particles and other dirt. Thus resulting in paste plate; (2) Reasons for workshop temperature, humidity and ink properties. Screen printing workshop requires to maintain a certain temperature of about 20 ° C and relative humidity of about 50%, if the temperature is high, the relative humidity is low, the volatile solvent in the ink will quickly evaporate, the viscosity of the ink on the screen becomes high, thus blocking the mesh. (3) The reason for the screen printing plate. The finished screen plate can be used after rinsing with water and drying before use. If it is placed too long after making a good version, it is not printed in time. In the preservation process more or less will adhere to the dust, if not cleaned when printing, it will cause paste. (4) The cause of printing pressure. During the printing process, the printing force is too large, which will bend the scraper, and the scraper is not in line contact with the screen printing plate and the glass, but is in surface contact, so that each scraping can scrape the ink clean, leaving the residual ink, and after a certain time, the conjunctiva will cause the paste plate. (5) The reason for improper gap between the screen plate and the glass. The gap between the screen plate and the glass can not be too small, the gap is too small after scraping the screen plate can not be timely out of the glass, when the screen plate is lifted, the bottom of the plate is glued to a certain ink, which is also easy to cause paste board. (6) The reason for the ink, in the printing process, the ink viscosity increases resulting in paste plate, because the ink solvent on the screen plate evaporates, resulting in increased ink viscosity, and the phenomenon of sealing the screen. The second is the fluidity of the ink, poor fluidity will make the ink in the screen when it does not produce paste.   Second, pinhole phenomenon   The pinhole phenomenon is the most headache for the staff engaged in glass screen printing. Pinholes occur for a variety of reasons, many of which are currently unexplained, and pinholes are one of the most important inspection items in the inspection of printed products. The causes of pinhole phenomenon are: (1) Dust and foreign matter on the plate. When making plates, some sol will be mixed into the washing development. If dust and foreign matter are attached to the screen plate, blocking the screen plate opening will also cause pinhole phenomenon. Before the formal printing, to carefully check the screen plate, eliminate the dirt on the plate; (2) The glass surface is not cleaned. The glass plate should be pre-treated before printing to make its surface clean and printed immediately. Pay special attention to when moving the glass by hand, the fingerprint of the hand will also be attached to the printing surface, and the pinhole will be formed when printing. The main reason for the emergence of bubbles is that the printing material is poorly treated before printing, which may be caused by substances such as dust and oil stains attached to the surface of the substrate, or by bubbles in the ink. (3) Too fast or uneven printing speed will also produce bubbles. The printing speed should be properly reduced to maintain the uniformity of the printing speed.   Three, the graphic part and the dark part appear speckled   Ink refers to the appearance of blotchy marks on the graphic part and the dark part of the glass surface, which damages the printing effect. Glass screen printing is easy, resulting in this phenomenon. (1) Printing speed and ink drying is too slow (2) The ink layer is too thin and the ink thixotropy is large (3) The influence of static electricity The pigment dispersion in the ink is poor, because of the polarity of the pigment particles, the particles agglutinate with each other, and the color blotches appear. Improved method 1. Improve ink fluidity 2. Use a quick-drying flux 3. As far as possible, use high viscosity ink printing, increase the thickness of the wet film of the ink, and try to use ink made of pigments with small oil absorption to minimize static The effect of electricity. 4. When the image is deformed, the printing pressure added to the printing plate by the scraper can make the line contact between the printing plate and the printed object, and do not exceed. Printing pressure is too large, the plate and the substrate inside contact, will make the screen telescopic, resulting in deformation of the printed image. Screen printing is a kind of printing with the smallest printing pressure in various printing methods. If the pressure cannot be printed without increasing the pressure, the gap between the plate and the glass surface should be reduced, so that the pressure of the scraper can be reduced.

With the development of industrial production and scientific skills, we continue to make new requests for conductive silica gel data. In the field of electronic and electrical appliances, because of the rapid development of integration skills and assembly skills, electronic components, logic circuits to light, thin, small direction, heat is also added, and then the need for high thermal insulation data, useful to remove the heat generated by electronic equipment, which is related to the service life of the product and the reliability of quality. The traditional way to deal with the heat dissipation of electronic equipment is to pad a layer of insulating medium between the heating body and the heat dissipation body as thermal conductivity data, such as mica, polytetrafluoroethylene and beryllium oxide ceramics, etc., this method has a certain effect, but there are poor thermal conductivity, low mechanical function, and advanced defects. At present, some of the heat dissipation of electronic equipment is processed by various forms of heat sinks, but most of them are necessary to be processed by thermal conductivity data, and thermal silica gel data is the most important member of thermal conductivity data. In this paper, the application of thermal paste and thermal silicone sheet to provide heat conduction treatment for electronic equipment is proposed. Thermal conductive silicone rubber material is a typical polymer composite material, its thermal conductivity function is mainly determined by the type of thermal conductive filler and the dispersion of thermal conductive filler in the silicone rubber matrix, thermal conductive filler is divided into metal filler and inorganic non-metallic filler, the thermal conductivity mechanism of various fillers is not the same, and the resolution of the difference between thermal conductivity or thermal conductivity. Thermal conductive paste is a mechanical mixture of silicone oil and thermal conductive filler. It has the characteristics of setting at any time, high thermal conductivity, non-curing and no corrosion to interface data. In electronic equipment, there are many contact surfaces and installation surfaces between various electronic components, there is a gap between them, resulting in poor warm flow, in order to deal with this problem, usually fill the thermal paste between the contact surface, use the activity of the thermal paste to sweep the air between the interface, drop or even eliminate thermal resistance.   Thermal silicone sheet is a sheet of thermal insulating silicone rubber processed by a special production process. It has the characteristics of natural viscosity, high thermal conductivity, high compressibility, high cushioning and so on. It is mainly used in the gap filling data of heating equipment and heat sink and casing, because of its soft material and elastic variable under the effect of low pressure force. It can touch the surface of the equipment even for the rough surface structure, reduce the air thermal impedance, and excellent treatment of thermal conductive silicon paste after high temperature silicone oil seepage, dust accumulation on the surface and other defects.

Foamed silicone has a wide range of applications, which can be used to manufacture many common parts, of which foamed silicone miscellaneous parts are used in the automotive industry, such as the sealing gasket of the automotive sealing box; Secondly, printers and fax machines have now developed to use foamed silicone rollers to reduce weight, shock absorption and other functions; Food-free materials (including seals in dishwashers and ovens and food containers for transporting food).   http://mao.ecer.com/test/siliconerubber-keypads.com/video-94098-videos-children-s-summer-silicone-beach-toy-sandbox-set-bucket-set.html   In addition, foamed silicone can especially be used for dense sealing rubber due to the high density component force and bonding force, so that the total material cost can be reduced by reducing the density. Foamed silicone products that need heat insulation and have irregular contact surfaces with foamed silicone seals are: insulators, foamed silicone gaskets, foamed film, foamed liners, foamed rollers and foamed extrusion products, etc.  

Some common silicone products in life are soft, while some are hard. Most people don't know how hard silicone is. In general, the hardness of ordinary silicone is 30°-80°, which is suitable for the production of most silicone products.   First of all, silicone products have good toughness and elasticity, and are not easy to be deformed by external forces. It will have a layer of oily material on the surface, so it will feel smooth. Mainly used in construction machinery, automobile, electronic products, home appliances, toys, medical, sports equipment and other industries. It has the functions of shock absorption, sealing, anti-static, high and low temperature resistance, wear resistance, flame retardant, acid and alkali corrosion resistance.   Secondly, most silicone products are made of silicone compounds, and the molding process is mainly oil pressure molding. The lower the hardness, not only is not conducive to the material placement of the product, but also because its internal structure is semi-fluid, bubbles will be produced during the high temperature vulcanization process. Therefore, we have high requirements for the selection of silicone materials for these products. At the same time, we must also use better vulcanizing agents, which can be solved by increasing the power of the vacuum machine and improving the mold structure. In short, the hardness of silicone products should meet the requirements of the product. In general, 50°-60° is common.

Silicone seal is a widely used sealing products, used in a variety of electronic appliances, mechanical equipment, automotive industry and other fields, with waterproof, dustproof, sound insulation and other excellent performance. However, sometimes the seal will be brittle, which will affect its sealing performance. So, what is the main reason for the brittle silicone seals?   In the process of use in different environments, the material and formula of silicone seals determine their elasticity and stability. If the silicone parts in the production process, raw materials do not meet the standards or there is a deviation in the formula, it is easy to affect the long-term stability of the silicone products. In addition, if the ambient temperature is too high or too low in the process of storage and use of seals, it is also easy to lead to unstable performance of silicone materials leading to insufficient life. Silicone products may also cause brittleness during use because of excessive pressure or improper use methods. For example, if the silicone material is excessively stretched or squeezed during the assembly process, it is easy to cause its deformation or rupture. In addition, if the seal is frequently exposed to corrosive substances or high temperature environments during use, it may also cause deterioration, thus affecting its performance and life.   The design and manufacturing processes also affect the risk of brittleness. If the design of the seal is unreasonable, such as complex structure or large curvature, it is easy to produce stress concentration during use, resulting in brittleness. In addition, if the silicone products manufacturers improper production operations, such as improper temperature and time control will also affect the performance and stability of the seals. In summary, the reasons for the brittleness of silicone seals are more complex, involving both materials and formulas, and the use of the environment and mode of use, but also inseparable from the design and manufacturing process. Therefore, in the process of selection and use of seals, it is necessary to operate in strict accordance with the specifications, pay attention to the ambient temperature and use method, and select the right products and manufacturers to ensure the quality and stability of seals. At the same time, manufacturers of seals should also strengthen quality control and technology research and development, improve the reliability and stability of products, and provide users with better products and services.

What is silicone sealed coil?   Silicone sealing coil is a silicone product that can play a sealing role in all walks of life. It has excellent sealing function, electrical insulation function, strong tensile strength, and the temperature range of silica gel is about -40 to 280 degrees.   Silicone sealed coil features: 1. Outstanding ability to compress and deform; 2. Resistant to neutral solvents; 3. Excellent heat and cold resistance; 4. Good electrical insulation, not easy to age; 5. Excellent resistance to ozone and oxidative corrosion. Silicone sealing coil technical parameters: Product specifications: φinner diameter mm × outer diameter mm(inner wall thickness = outer diameter); Product color: Customizable. Product hardness: about 60 degrees, other hardness can be customized according to requirements;