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

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;

Tempered glass cannot be cut by laser. The tempered glass can no longer be cut and processed, and the glass can only be processed to the required shape before tempering, and then tempered.   Tempered glass is a safety glass, tempered glass is actually a kind of prestressed glass, in order to improve the strength of the glass, usually use chemical or physical methods, the formation of compressive stress on the surface of the glass, the glass to withstand external forces first offset the surface stress, thereby improving the bearing capacity, enhance the glass itself resistance to wind pressure, cold and heat, impact and so on.   Tempered glass features: Step 1: Security When the glass is damaged by external forces, the fragments will become obtuse small particles similar to honeycomb, which is not easy to cause serious harm to the human body.   2. Height The impact strength of tempered glass of the same thickness is 3 to 5 times that of ordinary glass, and the bending strength is 3 to 5 times that of ordinary glass.   3. Thermal stability Tempered glass has good thermal stability, can withstand the temperature difference is 3 times that of ordinary glass, can withstand the temperature difference of 300℃.   Ordinary glass can be cut by laser, the advantages of ordinary glass using laser glass: First, all laser cutting methods use non-contact processing technology, which greatly avoids the problem of fine cracks and debris. Second, the residual stress left in the glass by the laser cutting method is very small (the residual stress of different cutting methods is different), so the strength of the cutting edge is higher. This is very important, if the residual stress is too large, then even in the center of the glass plate, it often causes the edge of the glass to break. Therefore, compared with the glass cut by mechanical method, the force that laser cut glass can withstand is 1-2 times larger.   We should remember that tempered glass can not be cut with laser, but ordinary glass can be cut with laser, if you want to cut the glass, you can cut it before tempering.

1, oxygen in rubber with rubber molecules free base chain reaction, molecular chain fracture or excessive crosslinking, causing rubber properties change. Oxidation is one of the important reasons for rubber aging.   2, the chemical activity of ozone is much higher than oxygen, more destructive, it is also to break the molecular chain, but the effect of ozone on rubber with rubber deformation or not is different. When the rubber is used for deformation, cracks appear in the direction of direct action with the stress, that is, the so-called "ozone cracking"; When acting on the deformed rubber, only the surface of the oxide film is formed without cracking.   3, increasing the temperature can cause thermal cracking or thermal crosslinking of rubber. But the basic function of heat is activation. Increasing the oxygen diffusion rate and activation oxidation reaction, thereby accelerating the rubber oxidation reaction rate, which is a universal aging phenomenon - hot oxygen aging. 4, the role of water has two aspects: rubber in wet air rain or long-term immersion in water, easy to destroy, this is due to the water-soluble substances in rubber and hydrophilic groups and other components are dissolved by water extraction, hydrolysis or absorption and other reasons. Especially under the alternating action of water immersion and atmospheric exposure, the destruction of rubber will be accelerated. However, in some cases, the moisture does not damage the rubber, and even has the effect of delaying aging.

In many silicone products, deformation often occurs in the process of use, such as the common silicone sealing ring, for example, some sealing products are long-term adhesive and metal pressing and extrusion, after frequent stress resulting in silicone sealing ring does not rebound, no stress phenomenon, some sealing rings are used in harsh environments for a long time, such as oxygen, heat, light under the action of aging phenomenon resulting in phase distortion. Therefore, in the initial stage, the use environment and time of silicone seals need to consider whether the material and the product can maintain a long-term life, and the elasticity is not affected.   In the process of use, a variety of high and low temperature is a major factor affecting the product, although the silicone material can accept more than 200 degrees to -40 degrees of high temperature, but long-term suitable for harsh heat conditions will accelerate the aging of the silicone seal ring, the higher the temperature, the greater the deformation of the product will be, and the largest force deformation of the silicone material is generally more than 40% will completely lose working performance. Causes the seal to leak and so on. When used at low temperatures, it is recommended to appropriately increase the compression and tensile degree. When used at low temperatures, attention should be paid to the phenomenon of product necrosis and deformation and rupture.   Tensile degree is one of the main operating capabilities of silicone sealing ring, so in the production of silicone products manufacturers will choose the corresponding pull strength material and various hardness of the use of conditions, so for long-term repeated use of the demand can choose high tensile silicone material processing production, in order to prevent the growth of products over time and affect the performance of the product, Due to the long-term operation of silicone rubber beyond the tensile range of the use of the case will often make the product become relaxed, lose tension, so in sufficient conditions to reduce the work of the tensile degree, long-term use of the biggest factor affecting the deformation of silicone material, so reduce the working pressure is the best way to maintain the seal ring, in addition to the performance of the product using high-quality materials, The higher the high tensile force and the higher the hardness of the product, the better the product quality.

Adhesive foot pad in a variety of products base as a foil buffer, it has been widely used in major industries, belongs to a kind of micro auxiliary accessories, low cost and simple function, but some products have it and it is too redundant, some items do not have it, so with its role and function, many items need to use it to set off the use, The difference is that it has a different process and a different structure. The function of the rubber foot pad is based on the adhesion of the bottom as a whole plane, at present, our common rubber gaskets are made of a plane with non-slip sungrain texture, and its main process is made of flat gaskets as a whole calendering process or molded sheet molding. This kind of silicone gasket has a wide range of applications, which are used in many seats, wardrobes and electronic and electrical products, so both sides belong to the plane structure under the premise of the plane effect, and can be applied to a variety of flat products for backgluing. The other is the structural rubber pad, this kind of foot pad must use the oil pressure molding process for production and processing, to make the effect of convex and curved structures to fit, this way is mainly for the processing of special-shaped rubber parts, can be used for customized rubber parts processing in various fields. Flat and shaped adhesive parts need to be fitted, the adhesive way is divided into single-sided adhesive and double-sided adhesive, followed by the adhesive paper is also very important, the current commonly used silicone adhesive paper is divided into TPE adhesive paper and double-sided adhesive paper. Back adhesive paper is also divided into genuine and imitation products, high strength and conventional adhesive, different quality for different products, the current silicone pad is commonly used 3M back adhesive paper, so in different pad life above which to consider its adhesive paper and use strength.