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

At present, there are hundreds of manufacturers of rubber products for automotive vibration reduction in China, and their products mainly include rubber springs, rubber air springs, frame beams, engine suspension shock absorbers, torsional dampers, etc. It plays an important role in limiting vehicle emissions, reducing noise, improving ride comfort and safety. With the rapid development of the automobile industry, especially the requirements for safety, comfort and easy driving are getting higher and higher, the amount of silicone products for automotive vibration reduction is increasing year by year, and the market demand for domestic automotive vibration reduction rubber products is about 150 million in 2008, and the number of high-end car production is increasing in the future. The market demand for rubber products for automotive vibration reduction is growing faster, so the demand for materials is also diversified. However, it is necessary to choose according to the different parts of the product used, from the consideration of fatigue resistance and creep performance, choose natural rubber; If you want to improve its heat resistance, choose styrene butadiene rubber; If the dynamic heat generation is small, you can choose butadiene rubber; If the rubber vibration reduction product is in contact with various oil media at work, nitrile rubber is selected; Due to stricter restrictions on automobile exhaust emission standards, the temperature of the engine and exhaust pipe is increased, and the rubber used in these parts needs to use EPDM rubber with high heat resistance.   The future development direction of China's automotive shock absorber is standardization and serialization, and the emphasis should be placed on the hydraulic shock absorber and torsion shock absorber that have been successfully applied abroad. Improve the level of detection and testing technology, develop new vibration damping rubber materials, the development of rubber vibration damping materials should further improve its heat resistance, the development of low dynamic rate, high damping new elastomer materials.

1. The tensile strength of rubber with small molecular weight increases with the increase of molecular weight. Generally, the tensile strength of rubber with molecular weight between 30-350,000 is the best.   2. The tensile strength with narrow molecular weight distribution is higher.   3, when there are polar substituents on the main chain, the tensile strength increases with the increase of intermolecular forces. For example, in nitrile rubber, the acrylonitrile content increases and the tensile strength increases.   4, tensile strength increases with the increase of rubber crystallinity. Such as NR, CR, CSM, IIR have higher tensile strength.   5. After the rubber molecular chain orientation, the tensile strength in the parallel direction increases, and the tensile strength in the vertical direction decreases.   6. Tensile strength decreases with the increase of crosslinking bond energy, and peaks with the increase of crosslinking density. The relationship between crosslinked bond type and tensile strength decreases in the following order: ionic bond -- polysulfide bond -- disulfide bond -- mono sulfur bond -- carbon-carbon bond   7, small carbon black particles and low structure (such as high wear resistance of low structure), surface oxygen-containing groups (such as slot black) its tensile strength, tear strength, high elongation.   8, the filler particles are small, the surface area is large, the surface activity is large, the reinforcement effect is good. As for the relationship between structure and tensile strength, the structure of crystalline rubber is not good for tensile strength, but for non-crystalline rubber is the opposite. The amount of carbon black in soft rubber is generally between 40-60 parts.   9. When the amount of softener exceeds 5 parts, the tensile strength of the vulcanized rubber will be reduced.   10. Other methods to improve tensile strength. Such as NR/PE, HS blend, NBR/PVC blend, EPDM/PP blend and so on.

Silicone cushion in the shipbuilding industry, silicone cushion reputation is a recognized fact; In the telecommunications industry, the silicone cushion with excellent quality and service has also won the favor by virtue of its good physiological stability. So what are the advantages of such a popular silicone cushion? Advantage 1, silicone cushion high temperature resistance Many industrial machines will be equipped with shock-absorbing cushions when installed, but because the machine will continue to heat up, the service life of ordinary cushions is very short. The silicone cushion has good physiological stability and shows excellent high temperature resistance, so the silicone cushion that will not be melted by high temperature is widely used in civil industry. Advantage 2, silicone cushion solvent resistance is good The expansion of the application range of silicone cushion is inseparable from its excellent solvent resistance. In many factories, hydrogen chloride solvent, aliphatic solvent, silicone ester hydraulic oil and lubricating oil can be said to be everywhere, and the silicone cushion with good solvent resistance can better adapt to different environments, and can also increase the service life of the silicone cushion. Advantage 3, silicone cushion electrical performance is good Ordinary cushion will become a super conductive body after moisture, which has an incalculable devastating impact on electrical equipment. In contrast, the silicone cushion has excellent electrical properties, and will heat up in a short time when the humid air comes, maintaining good electrical properties, thus protecting the machine. Advantage 4, silicone cushion tear resistance Some buffer pads with small tear resistance coefficient are easy to crack after bending and can not be used. The silicone cushion has excellent elasticity and excellent tear resistance, and can withstand long-term tearing under normal circumstances, without damage.

How to identify inferior silicone tube?   With the development of the silicone industry, many industries now need to use silicone tubes, in order to prevent the purchase of inferior silicone products, the following is a brief introduction to how to identify inferior silicone tubes?   1, how to judge the poor quality silicone tube: (1) Test the elasticity of silica gel, silica gel is more fragile, can try the elasticity, assuming that the elasticity is good, it may be rubber; Assuming it's not very elastic, it could be silicone. (2) Look at the color of the product, silicone is colorless and transparent, to make transparent silicone rubber products must be made of silicone as a material. (3) Smell, rubber and latex products have a strong taste, the smell is very pungent, some manufacturers increase the smell to cover up the taste, therefore, the choice of silicone materials will be better.

For consumers who do not understand the silicone material, the physical hardness of silicone rubber products may produce an ill-informed mind, the size of the product is the same without too much change, and the relationship between the formula and various physical properties is not complete to understand, all kinds of silicone, rubber and other material raw materials have its hardness and softness characteristics, natural silicone products are no exception, So why silicone material can be used in all walks of life in the world, because of its excellent hardness!   Different silicone products have its unique performance and process requirements, such as silicone silicone seals, silicone accessories, etc., can choose the most suitable polymer and match and reasonable deployment, in the hardness and softness to achieve close adhesion sealing shock absorption, waterproof oil and other effects, and hard and soft physical properties are still closely related to the formula and raw materials of the product. The debugging of the formula can try out various performance differences and functions, so the hardness and softness debugging still need to be careful, otherwise the hardness and softness errors are likely to cause inevitable trouble!   We all know that silicone material has good tensile strength, and the tensile strength of the index depends on the degree of hardness and softness of the product, silicone rubber products manufacturers generally the hardness of the manufacturer is about 20-80 degrees, the lower the hardness of the product tensile strength is better, generally can reach about 300%, the minimum is about 20%, However, it still depends on the structure and shape of the silicone product.   Silicone material is indispensable this is the tearing strength, silicone rubber material will be due to force and other factors and tear phenomenon, this is one of the inevitable phenomena of all rubber, and cracks and cracks caused by force cracking phenomenon occupy a minority, because silicone rubber with conventional hardness basically no tear rupture phenomenon, Materials with higher hardness are likely to tear due to the diffusion of the crack mouth!   Therefore, the tensile force and hardness of silicone products are important indicators of the material, silicone processing manufacturers in the vulcanization production procedures, the greater the silicon molecular weight of the compound, the greater the effective cross-linking fixed elongation stress. In order to obtain the specified constant elongation stress, the crosslinking density of the material with small molecular weight can be appropriately increased. Any structural factor that increases intermolecular forces. Increasing the density of silica gel material can prevent the hardness of the product from affecting the tensile strength of the product!

In our daily life, a lot of supplies are using tempered glass, so in our use of time to pay attention to some maintenance methods, if you do not know how to pay attention to maintenance details then it will affect the service life of tempered glass, then we will understand how to maintain tempered glass panel?   1, to prevent gravity impact: usually do not force the impact of the tempered glass panel, to gently handle, avoid collision, do not rub on the above, otherwise there will be scratches on it.   2, stain cleaning: daily cleaning can be wet towel or newspaper wipe, avoid acid and alkaline detergent, to clean the surface and keep dry.   3, emission: the glass must be placed in a relatively fixed and safe place, do not swing back and forth at will, to prevent bumping and damage, the ground should be placed smoothly, to prevent the center of gravity from being unstable and therefore toppling over, in addition, to avoid moisture, away from the stove, and acid and alkali and other chemical reagents isolation, to prevent corrosion and deterioration.   4, washing: can use plastic wrap and spray with detergent wet cloth, so that the glass is often covered with oil to keep clean, first spray the glass with detergent, and then paste plastic wrap, so that its solidified oil stains soften, ten minutes later, tear the plastic wrap, and then wipe with a wet cloth.   The above content is about how to maintain the tempered glass panel related content, I hope to help you.  

When rubber model products are vulcanized, due to the influence of material conditions (material structure, the fluidity of the rubber material during vulcanization) and process conditions (such as the pressure of the plate vulcanization machine or the clamping force of the French press, the mold structure and wear condition), the rubber material will be lost along the parting surface of the mold, forming an overflow rubber edge of different thickness, which is also called raw edge or flash edge. In order to make the product fit the given size and ensure the appearance and quality of the finished product, most rubber model products need to be trimmed after vulcanization, even the rubber parts made by the so-called "non-rubber edge die" distance, still have a small amount of rubber edges, in most cases, these rubber edges still need to be removed. The process of removing the edge of rubber products is called trimming.   The finishing work of rubber model products mainly includes removing the rubber edge of the product and processing the beautiful surface of the product (such as grinding and rotation treatment of the product using a grinder and a lathe). The more complex the structure of the image strand with more surfaces and inner and outer dimensions, the more difficult it is to trim the edge, the more time it takes to remove the edge, and the greater the cost. According to statistics, the labor consumed by the trimming process of the gluing model products can reach 38% of the total labor required for the processing and molding of the products. Therefore, it is very necessary to realize the mechanization and automation of trimming processing to the maximum extent and improve the quality and efficiency of trimming.

Silicone is one of the important raw materials for the development of today's society, and its performance is extended on its tasteless, non-toxic and environmental protection characteristics. Foam silicone temperature range in -65℃-200℃ can be used for a long time and maintain its soft and elastic properties, environmental protection and non-toxic, through SGS environmental non-toxic certification, with excellent electrical properties and chemical stability, water resistance, ozone resistance, climate aging resistance, non-corrosive, with physiological inertia, non-toxic and tasteless, low line shrinkage rate, easy to operate and other characteristics.   1. Silicone material has good sealing performance, high temperature resistance and weather resistance, anti-aging, shock-proof and waterproof, and can fit all kinds of smooth surface materials; 2, can back the tape self-adhesive, better sealing, high temperature adhesive long-term use without falling off. Environmental protection and safety, good insulation, high temperature resistance, small compression deformation, strong resilience, non-toxic; 3, Ruibo foam silicone rubber products foaming uniform, density can be 0.25-0.85g/cm3, Shore hardness 8-30A. Environmental protection, non-toxic, no odor, good resilience, good flexibility, no air bubbles on the surface. High strength, long service life, environmental protection insulation, high and low temperature resistance, compression resistance, acid and alkali resistance, anti-aging, anti-UV; 4, flat surface, uniform foam density; 5, good surface is not sticky, good permeability; 6, the use of 100% high-quality silica gel raw materials, and through strict testing, in line with environmental standards; 7, high temperature resistance: -70-300℃; 8, heat resistance: silicone rubber than ordinary rubber has much better heat resistance, can be used at 150 degrees almost forever without performance changes; It can be used continuously for 10,000 hours at 200 degrees; It can also be used for a period of time at 350 degrees. 9. High foaming ratio; Uniform foaming and good stability. 10. Non-toxic, non-corrosive, chemically inert; 11. Small, uniform and fine foam aperture; 12. Light weight, elasticity, feel good; 13. No migration occurs.   Silicone foam seals are mainly used for supporting electrical appliances, toys, electronics industry, mechanical seals, food and beverage industry mechanical seals, pharmaceutical chemicals and other hardware, medical equipment, sporting goods, audio, lighting, machinery, automotive, and other industries!

This process has higher requirements for mass star, which is a combination of silica gel and plastic liquid. This product has good thermal stability, cold resistance, good electrical insulation, combustion does not produce toxic substances and other characteristics. Therefore, it has become an irreplaceable material in the design of health care products, automobiles, baby products, medical supplies, diving supplies, kitchenware and silicone sealing products.   Extrusion molding, extrusion silicone products are usually extrusion silicone molding through the extruder, the general shape of extrusion silicone is long, tubular can be arbitrarily cut, extrusion process of the product shape is relatively single, mostly bar shape. Silicone rubber tubes are widely used in medical and mechanical equipment fields. It can also be used as a cache in packaging materials.   The silicone rubber is mixed with silica black, silicone oil, etc., and then rolled into a sheet. The film prepared by the calendering method has obvious difference between the longitudinal physical and mechanical properties and the transverse physical and mechanical properties, which is called the calendering effect. Specifically, the longitudinal tensile force of the film is larger than the transverse tensile force, the elongation of the transverse tensile force of the film is larger than the longitudinal tensile force, and the longitudinal contraction of the film is larger than the transverse contraction. The pressure effect is caused by the orientation of macromolecules and acicular and sheet complexes in the compound in the direction of pressure. Compound composition, calendering temperature, speed, speed ratio and so on have certain influence on the size of calendering effect. Suitable for large products, such as silicon film, silicone plate, etc. Injection mold operation method: injection mold or injection mold, suitable for relatively smooth or simple products, do not need mold line to save labor and time, the product or model you want to copy with plastic plate or glass plate surround, vacuum silica gel directly into the product above, after the silicone dry molding, take out the product, The injection mould is ready (Note: The injection mould is generally easier to release with soft silicone, which will not damage the products in the injection mould). It is a combination of solid and liquid, using products such as mobile phone covers, luggage covers, etc. Fast vulcanization, strong viscosity, good fluidity, easy to defoam. Catalyzed by platinum complex, non-toxic, odorless; Excellent thermal stability and cold resistance (use temperature -60° C ~200° C), after forming, air permeability, heat resistance, high tensile strength, excellent anti-slip performance; No pollution; Low hardness; The planting adhesive is firmly bonded. High tear resistance, high transparency, good tensile properties. Wear resistance, wash resistance, high temperature resistance, high three-dimensional layer sense, fabric smooth, soft, soft texture is excellent, good elasticity, wash and dry cleaning resistance. Used on cloth, it has anti-aging effect. For example, insulating silicone gloves, rain shoes and so on.

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.