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

Silica gel is a kind of polymer material widely used in medical, food, industry and other fields. To achieve medical grade, silicone products need to meet the requirements of the following aspects.   First of all, silicone products are required to use a sterile environment in the production process. Medical silicone products need to ensure that their use will not cause damage to the body, so the production process needs to exclude bacteria and other sources of pollution to prevent possible cross infection.   Secondly, silicone products need to pass strict quality testing. Medical silicone products need to have high purity, high elasticity, high transparency and other characteristics, need to pass various kinds of testing and certification, such as ISO9001 quality management system certification, FDA certification, European CE certification, etc., to ensure that it meets medical standards.   Finally, silicone products need to meet strict biocompatibility requirements. Medical silicone products need to be in contact with human tissues, physiological fluids, etc., so it is necessary to assess the impact of biological buffering, immunity, damage, etc., to ensure that silicone products will not have a negative impact on the human body.   Medical silicone products need to meet certain standards in manufacturing, quality testing and biocompatibility to ensure their safe and effective application in the medical field and escort people's health.

In many industries, rubber components play a vital safety role in everyday activities. For this, rubber components need to be durable. Although in many cases, rubber components have many ways to fail during use, mechanical fatigue is probably the most common failure mechanism, affecting almost all rubber-related components. In the future, we will also explore solutions for other failure mechanisms, such as wear and chips, chemical erosion, expansion and inelastic failures.   When it comes to mechanical fatigue, we are concerned with the long-term performance and service life of rubber components subjected to repeated mechanical loading and unloading cycles. Conveyors, synchronous conveyor belts, different tire components, AV bases require repeated mechanical cycles when working.   The challenge often faced by composite developers is how to extend the fatigue life of components without affecting other performance, or how to improve dynamic performance without affecting the service life of components. Fortunately, in the face of such challenges, we have a rich and well-developed scientific framework to address them, as well as some basic material selection guidelines that can help us.   Deformation control mode   First, we need to understand the loop running conditions of the component. Is rubber deformation controlled by the cyclic load or displacement applied? This is crucial because it helps us adjust the stiffness of the complex to ensure that the storage capacity is minimized in the event of deflection where cracks may occur. For example, under deflection control, we can select a soft compound that minimizes the energy stored in the compound under deflection and inhibits crack propagation. Instead, for load control situations, we can harden the complex to minimize component deflection.   Choice of rubber   The selection of suitable rubber is the most important for mechanical fatigue properties. Natural rubber is an excellent choice for crack and tear resistant compounds. Its ability to crystallize under strain results in automatic strengthening of the crack tip. This mechanism prevents and passivates cracks during cyclic relaxation and non-relaxation deformation. Of course, natural rubber is not suitable for all applications. High temperature operations or chemically harsh conditions require the use of specific synthetic rubber. Compared with natural rubber, the strain crystallization properties of most synthetic rubber are not outstanding. In contrast, synthetic rubber relies entirely on particle strengthening operations to achieve the desired crack growth and tear resistance   Selection of reinforcing agent   Reinforcing agents, such as carbon black, play a crucial role in determining the crack growth and tear resistance of rubber components. The key is to choose the right load class, surface area and structural layer of carbon black. The selected carbon black needs to exhibit good dispersion properties and minimal physical impurities during the complex mixing process to achieve further improvement. The same factors need to be considered when selecting other granular preparations. Filler agglomerates and raw material impurities lead to an increase in the size and number of crack signs of the composite, both of which have adverse effects on fatigue life.

With the development of social economy, domestic and foreign cars are frequently replaced, and the automobile industry is facing a period of rapid change. The development is characterized by further improving the service life of cars under the premise of ensuring driving safety, riding comfort, high-speed driving and luxury. Shock absorbing products are used to control the vibration and noise of the automobile and improve its handling stability, generally placed in the automobile engine frame, pressure rod device, suspension bushing, center bearing bracket, bump limiter and torsional vibration shock absorber and other parts to improve the safety and comfort of the automobile. Shock absorption products can be divided into four categories: bracket, bushing, cushioning and damping, the main requirements of shock absorption, heat resistance and fatigue resistance. Automotive shock absorbing rubber products include engine supports, suspension components, rubber springs, rubber air springs and collision rubber protective parts. In recent years, in order to improve the safety, comfort and operability of automobiles, the variety and number of shock-absorbing rubber products for automobiles have been increasing, such as the number of shock-absorbing rubber products on a car has reached 50-60.   Rubber shock absorbers for the engine and transmission operating system are used to insulate the vibration of the source. Multi-lateral coupling and damping clutch are adopted for shock absorption in transmission part. The shock absorber used on the front and rear suspension device should not only bear the weight of the car body, but also prevent the car body from transmitting the up and down vibration of the wheel, restrain the irregular movement of the unsprung mass, and transmit power and braking force. The rubber buffer is one of the important shock absorbers of the car body. Its structure form is that there is a rubber layer between two metal plates, and the shear deformation of rubber is used to achieve the purpose of buffering. Recently, the cylinder buffer filled with nitrogen and co-existing with shock absorber oil has been developed, which is characterized by improving the load capacity of the buffer (up to 20 MPa), good shock absorption effect, and prolonging its service life. The rubber materials used in automotive rubber shock absorbers are mainly NR and SBR. In order to improve the heat resistance of shock absorber products, IR, IIR, CR, EPDM and so on have been used as the main material. Thermoplastic elastomers will also be used in some shock absorbers, such as body and chassis shock absorbers.

Plexiglass has another common name, called acrylic, I believe that many people are more often heard.   The transparency of plexiglass is very good, and experiments have shown that more than 92% of the sunlight can be passed, and the hardness is very high, and it will not be easily broken. And in the car's headlights and other places are also applied to plexiglass, plexiglass corrosion resistance is also good, will not age in a short time.   The price of plexiglass is also relatively close to the people. And what are the characteristics of plexiglass?   First, highly transparent plexiglass is an excellent polymer transparent material, the solar lamp tube of the artificial small sun is quartz (because quartz can fully penetrate ultraviolet light), ordinary glass can only penetrate 0.6&ultraviolet light, but plexiglass can penetrate 73%.   Second, the relative molecules of high mechanical strength plexiglass are about 2 million, which is a long chain of polymer compounds, and the chain forming the molecule is very soft, therefore, the strength of plexiglass is high after all, and the tensile resistance and impact resistance are 7-18 times higher than ordinary glass. There is a kind of heated and stretched plexiglass, even if the nail penetrates the plexiglass, it will not crack, and this organic glass will not break into fragments after the bullet puncture. Therefore, the stretch-treated plexiglass can be used as bulletproof glass, and it is also used in the cockpit of military aircraft.   The density of light weight plexiglass is 1.18g/cm3, and the same size material, its weight is only half of ordinary glass!   Fourth, easy to process plexiglass can not only be cut with a lathe, drilling machine for drilling, but also can be bonded into various shapes of equipment with imitation, but also can be processed into large aircraft cabin cover, injection, extrusion and other plastic molding methods, small to dentures and dentures and other products.   The application of plexiglass is very wide, and plexiglass is not only in light industry, commerce, chemical industry and so on. Moreover, the application in advertising decoration and sand table model is also very extensive.

In recent years, with the development of science and technology and industry, the acrylic mirror industry is more and more mature, and the application range is also very wide. But now the quality of acrylic materials on the market is uneven, good quality acrylic, and poor quality acrylic, there is still a big difference in the use of.   1. Visual observation method   This is based on the material characteristics of acrylic itself to judge, acrylic light transmittance can reach more than 92%, pay attention to the following points when buying:   1) Whether the acrylic sheet has serious fading   2) How is the gloss of acrylic sheet   3) How light transmittance of acrylic sheet   If there are the above three problems, it means that the quality of acrylic sheet is relatively inferior.   Second, the transmittance observation method   The light transmittance of acrylic can reach more than 92%, and the light color after passing through the acrylic sheet is the same as the original light color.   Use a flashlight with positive white light to illuminate the acrylic (because positive white light is better to distinguish), if the color of the light through the blue or yellow words, it indicates that the quality of the acrylic plate is relatively inferior.   Third, hot melt paste method   The adhesive degree of good quality acrylic plate and poor quality acrylic plate is not the same, the good quality acrylic plate is easily separated after hot melt, and the poor quality acrylic plate is not easy to separate after hot melt.   4. Ignition method   One of the characteristics of acrylic: flame retardant. Before purchasing, you can ask the manufacturer for a few more samples and test with small samples.   Ignite the sample, if the sample is easy to burn up, it means that the quality of the acrylic plate is not good. Because good quality acrylic is not easy to light.   5. Touch the Law   The more direct way, just touch it, see how it feels.   If you feel the feeling of lime, feel the dust, look closely and there are some small pits, then this must be a poor quality acrylic plate   High quality acrylic sheet, feel creamy, and the surface is smooth and flat.

1. Raw material management   The storage place of rubber raw materials must be kept dry, clean, no debris, no oil; Store in a cool and ventilated place during high temperature in summer. Before all rubber materials are stored, the appearance, hardness and humidity of rubber raw materials must be checked, and recorded and archived. After confirming the qualification, production can be carried out. Natural and synthetic rubber have very low moisture content, such as moisture content. 1% (typical value is 0.20%~0.40%MC, and some moisture content is even lower), if the moisture is too high, it will have a significant impact on the production molding process. When storing rubber raw materials, it should be 20~25cm from the ground and more than 30cm from the wall.   2. Warehouse management   The finished product warehouse shall be protected against moisture, mildew, lightning and pollution. When storing rubber products, they should be classified and placed in positioning codes, 20~25cm from the ground, 30cm from the wall, and there are obvious classification signs. The temperature and humidity in the warehouse should meet the storage requirements of the products. If conditions are best equipped with dehumidifier. Storage according to the product instructions of rubber parts, avoid direct sunlight, heat, moisture and do not contact with solvent oil, lubricating oil and other solid materials, storage temperature is generally between 0-25℃. Proper ventilation. When the outdoor temperature or humidity is greater than the indoor, it is not appropriate to open the window for ventilation. Enter and exit the warehouse according to the principle of first in first out.   3. Transportation management   When loading container trucks, use an appropriate amount of dry container desiccant on the hooks inside the container trucks to ensure that the tires are not affected by moisture and mildew during transportation.

First, rubber raw glue   The formulation of high hardness rubber often requires a large amount of filling and reinforcing agent, and the selection of raw rubber should choose the brand of high Mooney viscosity. For example, EPDM should choose a brand with high Mooney and high ethylene content; NBR can choose high Menni, high acrylonitrile content brand. Sometimes according to the needs of other properties, you can choose to use high and low Mooney glue, low Mooney glue is not conducive to a large number of filling.   Second, reinforcing filler   Reinforcing with carbon black and white carbon black is the best choice, the comprehensive performance of the two is better, the ability to increase hardness is strong, and the effect of fine particle carbon black is the best, but high hardness rubber material needs a lot of filling, if you use fine particle carbon black alone, rubber mixing, vulcanization and other processes will have serious problems, so fine particle carbon black and large particle carbon black combined use the best effect. Such as N330/N550 collocation. Other weak reinforcing fillers should not be used as far as possible, because these fillers have a weak ability to increase hardness, and a larger number of fillers are needed to achieve the target hardness than carbon black and white carbon black, resulting in a decline in the comprehensive performance of the rubber and the process performance.   Third, plasticizer   High hardness compound requires a lot of filling reinforcing agent, resulting in rubber mixing, vulcanization and other process problems, the right amount of plasticizer or to add, although the plasticizer will reduce the hardness of the compound. The selection of plasticizers is appropriate for solid plasticizers, such as solid coumaron.   Fourth, curing agent   Increasing the crosslinking density of the compound is beneficial to improving the hardness of the compound. For sulfur vulcanization system, increasing the amount of accelerators, especially TMTD accelerators, is conducive to improving the hardness. The increase in the amount of vulcanization can also improve the cross-linking density and enhance the hardness of the rubber, such as when the amount of sulfur reaches 30 to 50 mass parts, hard rubber can be prepared, but when the amount of sulfur and the amount of accelerator are increased, it is easy to produce frosting phenomenon, and the amount needs to be balanced. In addition, for sulfur vulcanization system, high hardness rubber due to high filling, mixing and vulcanization processing heat increase, easy to cause scorch phenomenon, so for the sake of insurance, with anti-scorch agent is also of great benefit, such as CTP. Silicone foam board For the peroxide vulcanization system, increasing the amount of peroxide can improve the hardness, but not too high, you can choose a variety of peroxide vulcanization agents and use, in addition to the addition of crosslinking agents can significantly improve the cross-linking density of the rubber, such as DCP vulcanization agent, can add TAIC, PDM (HVA-2), TAC, PL-400 (TMPTMA), Of course, sulfur can also be used as a cross-linking agent.

Silicone material is a polymer organic silicon material with the following advantages: 1. Good flexibility: Silicone materials have good flexibility and elasticity, which can withstand long-term tensile deformation without permanent deformation, making them very suitable for manufacturing products that require long-term use. 2. Chemical inertness: Silicone materials are not affected by most chemical substances and can withstand the corrosion of many strong acids, alkalis, and other substances. Therefore, they are widely used in many high-end industries, such as healthcare, food, cosmetics, and other fields. 3. Good processability: Silicone materials are easy to manufacture into various shapes and sizes, and can be processed through various methods such as injection molding, extrusion, blow molding, etc. 4. Higher temperature range: Silicone materials can be used in the range of -55 ℃ to 250 ℃, exhibiting relatively stable performance, and are therefore widely used in high-temperature fields. 5. Excellent insulation: Silicone material is an excellent insulation material that can effectively prevent energy transfer. 6. Good wear resistance: Silicone material has good wear resistance and is rarely damaged due to friction. Therefore, silicone materials have shown excellent performance and broad application prospects in many fields.

Acrylic mirror panel is a popular material for various uses due to its durability, lightweight, clarity, and shatterproof nature. It is commonly used in home decors, furniture, automobile parts, and store displays. However, like any other material, it requires proper care and maintenance to extend its lifespan and preserve its original appearance. Here are some tips on how to take care of acrylic mirror panels: 1. Cleaning To clean acrylic mirror panels, use a soft cloth or sponge and a mild soap solution or a non-abrasive cleaner. Avoid using harsh chemicals such as acetone, ammonia, or alcohol-based cleaners as they can damage the acrylic surface. Also, avoid using scrubbing pads, abrasive cleaners, or scouring powders as they can leave scratches on the surface that can affect its clarity. Rinse the panel with clean water and dry it with a soft cloth or a microfiber towel. 2. Avoid direct sunlight Acrylic mirror panels can become discolored or warped if exposed to direct sunlight or high temperatures. Therefore, it is essential to place them away from windows or areas with extreme heat or sunlight. 3. Avoid contact with sharp objects Acrylic mirror panels can scratch easily, so it is crucial to avoid contact with sharp or hard objects, such as jewelry, keys, or utensils. If necessary, cover the surface with a protective film to prevent scratches. 4. Store properly If acrylic mirror panels are not in use, store them in a dry and cool place away from direct sunlight. Avoid stacking the panels as they can cause scratches or damage to the edges. 5. Maintain proper ventilation Acrylic mirror panels can emit toxic fumes when exposed to fire or high temperatures. Therefore, it is crucial to maintain proper ventilation in areas where they are used. 6. Check for damages Regularly inspect acrylic mirror panels for cracks, scratches, or other damages. If there are any damages, take immediate action to repair or replace the panel to prevent further damage. Proper care and maintenance of acrylic mirror panels are essential to ensure their longevity and appearance. Regular cleaning, avoiding direct sunlight, contact with sharp objects, proper storage, ventilation, and checking for damages are some of the ways to maintain the quality of acrylic mirror panels.

Nitrile rubber is a synthetic rubber that is derived from acrylonitrile and butadiene. This type of rubber is known for its excellent resistance to oil, fuel, and chemicals, making it an ideal material for use in a variety of industrial applications. Some of the most common uses of nitrile rubber include engine seals, gaskets, hoses, and O-rings.   One of the key benefits of nitrile rubber is its ability to withstand exposure to a wide range of chemicals and solvents. This makes it an ideal material for use in the automotive and aerospace industries, where it is frequently used in the manufacture of fuel and oil hoses, as well as engine gaskets and seals. In addition to its chemical resistance, nitrile rubber is also highly resistant to abrasion, which makes it ideal for use in high-wear environments.   Another benefit of nitrile rubber is its versatility. It can be formulated to meet a wide range of hardness and flexibility requirements, which makes it suitable for use in applications as diverse as seals for electronics, printing rollers, and medical gloves. Because it is a synthetic rubber, nitrile is also a more affordable and environmentally-friendly alternative to natural rubber.   In the medical industry, nitrile rubber is used primarily to make disposable gloves. These gloves are particularly popular among healthcare workers because they are highly resistant to punctures, tears, and chemicals, which makes them ideal for use in a variety of medical settings. Nitrile gloves are also latex-free, which makes them a safer option for people with latex allergies.   One of the most important benefits of nitrile rubber is its longevity. This type of rubber is known for its durability and resistance to degradation over time, which means that it can be used in demanding applications with minimal risk of failure. This, in turn, helps to ensure that industrial processes run smoothly and efficiently, which translates to improved productivity and reduced downtime.   Overall, nitrile rubber is a versatile and highly effective material that has a wide range of applications in industry and manufacturing. Its excellent resistance to chemicals and solvents, abrasion resistance, versatility, affordability, and longevity make it an ideal material for use in demanding and high-wear environments. Its widespread use in the automotive, aerospace, medical, and electronics industries is a testament to its effectiveness and versatility. As such, it is likely to remain an important material in the manufacturing landscape for years to come.