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

There are indeed many rubber raw materials for oil seals, such as nitrile butadiene rubber, fluorine rubber, hydrogenated nitrile butadiene rubber, silicone rubber, AEM and so on.   However, which raw materials to use as oil seals are selected according to the requirements of the use of oil seals. The use of oil seal environment is hot oil state, need temperature resistance, oil resistance.   1, silicone rubber is not oil resistant, does not meet the requirements, eliminated; 2, if the temperature of the working part is low, generally within 120 degrees, NBR is optional, and the relative price is also suitable; 3, if the temperature exceeds 120 degrees, you need to choose ACM, but its gasoline resistance is not good, processing problems are more, compression time will be long deformation. Oil seals made of ordinary ACM materials are prone to oil leakage under high-speed operation. Consider using AEM. 4, if the requirements are higher, the cost is more relaxed, fluorine rubber is the best choice. Now fluorine rubber raw rubber on tens of yuan, such as the cost constraints are basically solved, fluorine rubber cost-effective. 5, if the requirements are higher, such as the seal inside the oil well, you can only use hydrogenated nitrile rubber.

Silicone products how to remove odor, silicone products with its excellent high temperature resistance, oxidation resistance, wear resistance and other characteristics, widely used in daily life and industrial production. However, some silicone products may produce unpleasant odors after they have just been produced or stored for a long time. The smell of silicone products will affect the user experience of consumers.   The odor of silicone products comes from a variety of sources, which may be caused by factors such as residues in the production process, the smell of the material itself, and the pollution of the storage environment. In order to remove these   1.we can start from the following aspects: First, cleaning treatment Cleaning is the first step to remove the odor of silicone products. The use of mild detergent and water, the thorough cleaning of silicone products, can remove surface dirt and residue, thereby reducing the source of odor. Be careful not to use too strong cleaning agents or chemical solvents during the cleaning process, so as not to cause damage to the silicone material.   2.ventilation and drying The cleaned silicone products are placed in a well-ventilated place for drying, which can effectively remove the residual odor. The ultraviolet rays in the sun have a certain bactericidal effect and can help eliminate odors. At the same time, a well-ventilated environment also helps to discharge harmful gases outside and reduce the production of odors.   3. Use activated carbon Activated carbon is a substance with strong adsorption capacity that can remove odors and harmful gases from the air. Placing silicone products in containers filled with activated carbon can speed up the removal of odors. It should be noted that the adsorption capacity of activated carbon is limited, and it needs to be replaced regularly to ensure the effect.   4. Use vinegar water Vinegar water is a natural cleaning agent, and it also has a certain effect on removing the odor of silicone products. Soak the silicone product in diluted vinegar water for a period of time, and then take it out to dry. The acidity of vinegar water can neutralize the alkaline substances on the surface of silicone products, thereby reducing the production of odor.   5.the use of professional deodorant For some stubborn odors, we can consider the use of professional deodorant. These deodorizers usually have a stronger odor removal ability, and can be targeted for the odor of silicone products. When selecting odor remover, we need to pay attention to the selection of good quality, safe and reliable products, and operate in accordance with the use methods on the instructions.

Silicone products are widely used in many fields because of their excellent heat resistance, corrosion resistance and good elastoplasticity. As an important physical property index of silica gel products, hardness has a significant impact on its application effect and service life.   First, the development of hardness standards of silicone products   The development of hardness standards for silicone products is mainly based on the relevant standards issued by the International Organization for Standardization (ISO) and the American Society for Materials and Testing (ASTM) and other authoritative bodies. These standards specify the test method, grade division and qualification range of silicone products hardness, and provide clear guidance for producers.   Second, the grade division of the hardness standard of silicone products   The Hardness standard of silica gel products is usually measured by Shore Hardness, which is divided into three grades: Shaw A, Shaw C and Shaw D. Shaw A is mainly used to test softer silicone products, Shaw C is suitable for medium hardness silicone products, and Shaw D is suitable for harder silicone products. Within each grade, it is divided into several different numerical ranges according to the size of the hardness value to represent different hardness levels.   Third, silicone products hardness standard application guide   Silicone products with different hardness have different application scenarios. Low hardness silicone products are suitable for occasions requiring high elasticity and softness, such as seals, non-slip pads, etc. High hardness silicone products are suitable for occasions that require greater pressure and wear resistance, such as guide rails and support parts.   When choosing silicone products, the appropriate hardness level should be selected according to the specific use requirements and scenarios. For example, for silicone products that need to withstand long-term pressure, materials with higher hardness should be selected to ensure their wear resistance and stability; For silicone products that need to be in contact with the skin, materials with lower hardness should be selected to ensure its comfort and softness.   It should be noted that the hardness of silicone products is not the harder the better or the softer the better, but to make a reasonable choice according to actual needs. Hard silicone products may lead to increased brittleness, fragile, and too soft silicone products may affect its load-bearing capacity and service life.   In addition, for the same silicone product, its hardness may be affected by factors such as temperature, time and environment. Therefore, in the application process should pay attention to the change in the hardness of silicone products, and make corresponding adjustments and maintenance.

The so-called vulcanization means that under the conditions of heating or irradiation, the raw rubber and the vulcanization agent in the rubber have a chemical reaction, and the linear structure of the polymer cross-linked into the three-dimensional network structure of the macromolecule, and the physical mechanical properties and other properties of the rubber have fundamental changes. In industrial production, the vulcanization crosslinking reaction is generally completed under certain conditions of temperature, time and pressure. These conditions are commonly referred to as the three elements of vulcanization. In the production of vulcanization conditions, the correct selection of vulcanization equipment and the selection of heating media are important technical content in the vulcanization process. In the vulcanization process, a series of properties of the rubber material has undergone significant changes, taking different vulcanization time of the test pieces for various physical and mechanical properties, it can be seen that after the tensile strength, fixed elongation stress, elasticity and other properties reach the peak, the vulcanization time is extended, its value decreases, while the hardness remains unchanged. The properties of elongation and permanent deformation decrease gradually with the vulcanization time. After reaching the lowest value, the vulcanization increases slowly. Other properties such as heat resistance, wear resistance and swelling resistance are improved with the increase of curing time. The general rule of several main physical and mechanical properties of rubber (taking natural rubber as an example) is as follows: 1, fixed elongation stress When the rubber is not vulcanized, the linear molecules can flow freely among each other, showing non-Newtonian flow characteristics in the plastic range. However, with the deepening of the degree of vulcanization, the flow freedom becomes smaller and smaller, and the deformation force required for fixed-length stretching becomes larger and larger. This is called "constant elongation stress". 2. Tensile strength The tensile strength of soft rubber is gradually increased with the increase of the degree of crosslinking until the highest value appears. When further vulcanized, the tensile strength decreases sharply over a flat area. In ebonite with a large amount of sulfur, the tensile strength decreases and then rises until it reaches the level of ebonite. 3, elongation The elongation of rubber decreases gradually with the increase of crosslinking degree. 4, compression permanent deformation The compressive permanent deformation of rubber also decreases gradually with the increase of crosslinking degree. For the rubber with vulcanization reduction, after positive vulcanization, the compression permanent deformation gradually increases. 5. Flexibility The elasticity of rubber comes from the reversible change of the micro-Brownian motion position of the flexible chain segment of macromolecules. Due to the existence of this property, a small external force will cause a large deformation of rubber. In the plastic state, the displacement of rubber molecules is irreversible, but after the rubber molecules are cross-linked, there is a relative positioning between each other, resulting in a strong tendency to reset. However, when the degree of cross-linking continues to increase, the resetting tendency of the macromolecules after deformation is reduced due to the excessive relative stability. Therefore, when the vulcanized rubber is seriously over-sulfur, the elasticity is weakened, and the elasticity is changed from elastomer to rigid body elasticity. 6. Hardness The hardness of vulcanized rubber increases rapidly after the beginning of vulcanization, reaches a maximum value at the positive vulcanization point, and then remains basically constant. 7, anti-swelling Unvulcanized adhesives, like other polymers, swell in some solvents and absorb them until they lose cohesion. Rubber molecules enter the solution, and swelling occurs only when the osmotic pressure of the solvent on the rubber is greater than the cohesion of the rubber molecules. 8. Breathability After the degree of rubber crosslinking increases, the void in the network structure gradually decreases, and the ability of gas to pass and diffuse in the rubber is weakened due to the increase in resistance, so the permeability resistance of the former is better than that of the fully vulcanized elastomer and the insufficient vulcanization. 9. Heat resistance The heat resistance is best under positive vulcanization. 10. Wear resistance After the beginning of vulcanization, the wear resistance gradually increases and reaches the highest level in positive vulcanization. Both under-sulfur and over-sulfur are detrimental to wear resistance, but over-sulfur is less affected.

Silicone products how to improve the hardness, silicone products because of its excellent elasticity, water resistance and aging resistance, has been widely used in many fields. However, with the continuous expansion of the use of scenarios, the hardness requirements of silicone products are becoming higher and higher. Silicone products manufacturers have a process to improve the hardness of silicone products, so how to improve the hardness of silicone products?   First, the influencing factors of the hardness of silicone products The hardness of silica gel products is affected by many factors, including the choice of silica gel raw materials, the type and amount of vulcanization agent, and the control of vulcanization process. Therefore, to improve the hardness of silicone products, we first need to start with these factors and conduct in-depth research and analysis. Second, the method of improving the hardness of silicone products 1. Choose the right silicone raw materials The properties of silica gel raw materials have a direct impact on the hardness of products. In general, the hardness of products made of silica gel raw materials with higher hardness will also increase accordingly. Therefore, when purchasing silica gel raw materials, the varieties with higher hardness should be selected according to actual needs. 2. Adjust the type and dosage of vulcanizing agent Vulcanizing agent is one of the important factors affecting the hardness of silica gel products. Different types of vulcanizing agents have different effects on the vulcanization rate and hardness development of silica gel. By adjusting the type and dosage of vulcanizing agent, the hardness of silicone products can be effectively improved. It should be noted that the amount of curing agent is not the more the better, excessive use may cause the product hardness is too high and lose elasticity. 3. Optimize the vulcanization process Vulcanization process is the key link in the production of silica gel products. Reasonable vulcanization temperature, time and pressure and other parameters are helpful to achieve the uniformity and stability of the hardness of silicone products. Therefore, in the production process, the vulcanization process should be continuously optimized to improve the hardness of the product. 4. Add hardness enhancer Adding hardness enhancers, such as calcium carbonate, silica black and other inorganic fillers, can effectively improve the hardness of silica gel products. These fillers play a skeleton role in the silicone matrix and increase the rigidity of the product. However, it should be noted that the amount of filler added should be moderate, too much may lead to a decline in product performance. 5. Improve product structure design The structural design of the product also affects its hardness. By optimizing the structure of the product, such as increasing the wall thickness, changing the cross-section shape, etc., the hardness of the silicone product can be improved to a certain extent. In addition, reinforcing bars or other reinforcing structures can be added to the key parts of the product to improve the overall hardness of the product.

Silicone products, as a widely used in medical, home, baby products, kitchen utensils and other fields of material, its antibacterial performance has been concerned.   First of all, silicone products have natural antibacterial properties. The silicone material itself has a certain antibacterial effect, which can inhibit the growth and reproduction of bacteria. This is due to the microstructure and chemical properties of the surface of the silica gel material, so that it has a certain repulsive effect on bacteria. In addition, the silica gel material also has good permeability and hygroscopic properties, which helps to reduce the environment for bacterial breeding. However, it should be noted that the antibacterial properties of silicone products are not absolute. Although the silicone material itself has a certain antibacterial effect, in practical applications, its antibacterial effect will be affected by a variety of factors. For example, the antibacterial properties of silicone products will gradually weaken with the increase of use time; At the same time, if the silicone products are not kept clean and dry during use, it is also easy to lead to bacterial growth. In order to further improve the antibacterial properties of silicone products, manufacturers usually use some special treatment processes. For example, the silicone material is treated with antibacterial agents to enhance its antibacterial effect; Or using nanotechnology, a layer of antibacterial film is formed on the surface of the silicone material, so as to more effectively inhibit the growth of bacteria. In the medical field, the antibacterial properties of silicone products are particularly important. Che rubber catheter, Che rubber nipple, for example, medical supplies, such as the need to have good antibacterial properties, in order to reduce the risk of infection in patients with. In addition, in the field of home and baby products, the antibacterial properties of silicone products have also attracted attention. Silicone baby bottles, toys, etc., can effectively reduce the growth of bacteria and protect the health of infants.   In general, silicone products have certain antibacterial properties, but in practical applications, it is still necessary to pay attention to keep clean and dry to give full play to its antibacterial advantages. At the same time, manufacturers are also constantly exploring new technologies and processes to improve the antibacterial properties of silicone products to meet the needs of consumers in different fields.

Absorbing vibration: This kind of rubber shock absorber is mainly used for the connection between the engine and the body, in this state, the engine is the vibration source, the role of the shock absorber rubber is to absorb the vibration generated by the engine, to avoid transmission to the car body, but also to reduce the vibration of the engine itself.   Vibration reduction: This kind of rubber shock absorber is mainly used for the connection between the chassis and the body, in this state, the chassis wheel is the vibration source, the role of the shock absorber rubber is to rapidly reduce the vibration generated by the road and the wheel through the high damping effect, to prevent the vibration passed through the chassis to the body.

The color of silicone products is very important in the production, for the color and color matching work, the operator needs to have a keen color vision and rich operating experience. In the whole process of color mixing, follow the principle of light and deep, and flexibly use various color masterbatches in the process of color mixing.   The color matching in the color box of silicone products is two different color concepts, color matching is our first color with the goal, and then according to their own experience to match the color, the color of various color masterbatches in proportion, and then match the product close to the target color, and the color is the existing color adjustment to the product close to the target color. The toning operation between the two people must be delayed according to the change of color, and different colors need to formulate the formula and refreshing the color change from the beginning, the toning work of the silica gel product toning box is to facilitate the operator to have rich operating experience and good color resolution ability, by its flexible use according to the understanding of various color masterbatches. And the whole color matching process must be in line with the slow conversion from light to dark, each time the color matching color is snow to record the corresponding data, to know that sometimes the data is accurate, record the master of color components, until the actual color and the target color is close, but also need to summarize a good color matching formula and record it, to facilitate the next effective data accumulation. Shorten the time of color matching.   Silicone products should pay attention to the application of mutual color elimination in the color mixing process, the so-called color elimination is to use the characteristics of two kinds of dyeing each other, if there is a blue with red light, if the red light is too heavy products are not qualified, you can add a small amount.

Silicone products are currently a wide variety of processes, different product needs to use different processes, and most products can not avoid the screen printing process, for the screen printing process is not only in the silicone industry, many of the patterns of products in life need to be printed will be completed by screen printing workers, Because the screen printing mat has many talents and is widely recognized in many industries, its process is to use two-component liquid silicone and curing agent color paste to make the required screen printing color, and complete the screen printing process through the screen printing machine. In the silicone rubber industry, its purpose is to realize the pattern of the product appearance with the font engraving. For example, our common silicone buttons are one of them.   For the screen printing process, it has many excellent characteristics, good fluidity, strong adhesive viscosity, stable resistance to high and low temperatures, good weather resistance and aging performance, the product pattern is more three-dimensional and feel, the screen printing pattern also has excellent peeling strength, wear resistance and brightness; It is also waterproof, non-slip, breathable, resistant to high and low temperatures, and has excellent leveling property. What details do you need to pay attention to in the silk-screen printing process in the production process of silicone products manufacturers? The screen printing process has high requirements for the pattern, so it will appear in some silicone buttons and silicone protective sleeves and other processes. The ink of the product is more important for the screen printing mat. Good quality ink will improve the quality of the pattern, and some products will fade after long-term use. There are mainly several reasons that lead to the product fading phenomenon :1. The baking temperature of silicone products after screen printing is too low and the time is short, resulting in poor character wear resistance of silicone products after screen printing, and the characters begin to become blurred after several times of use; 2, the quality of screen printing ink is too poor, affecting the surface of silicone products. 3, the surface of silicone products is too dirty, preventing the adsorption of screen printing ink and silicone, causing the character to be wiped away.

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.