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

Silicone products and rubber products are two kinds of products in the same industry. They both possess advantages and just have a few small differences. The main difference between the two is that silicone is classified as a synthetic rubber and rubber is natural. Also, silicone retains its elasticity and flexibility for much longer, potentially for the lifetime of the product, and can withstand more extreme temperatures than rubber. Both materials are used for a variety of products from medical supplies to automotive parts, but silicone is most popular for use in industrial products where cleanliness, sanitation, and resistance to particular chemicals are important. Rubber has several advantages due to the fact that it is natural, with the first (and perhaps most important) being that it consists of certain organic compounds that can resist certain organic compounds and bacteria. Its low cost and light weight make it a popular product for applications like car parts and gaskets. Rubber also possesses good insulation and elasticity. Silicone products are more expensive and less durable than rubber, but their ability to withstand extreme temperatures within the range of –50 to + 200 Celsius degrees, their low toxicity, and lack of sensitive functional chemistry means they are ideal for products that require a safe and resilient material. Other advantages include greater flexibility, resistance to solvents, and inert nature, which makes them non-reactive with other chemicals. Both rubber and silicone products offer advantages that make them ideal for certain products or applications. The choice between the two will depend largely on the application and function of the product itself.

Silicone products in the molding process a little attention will appear some adverse phenomena. For example, silicone products have poor elasticity. And some of the more frequently used silicone parts have certain requirements for tensile toughness, and the product mainly needs his tensile toughness to maintain. Therefore, in some manufacturing industries, the silicone material used in the mechanical industry will be useless once there is insufficient pull strength, springback shock absorption failure, and other performance of the product will be useless. Therefore, the operation of personnel in the molding process, the modulation of the machine, the coordination of raw materials are the key to the toughness and poor product.

Check the mold to see if the mold wear is relatively large, the accuracy is not high enough, resulting in the production of silicone sleeve burr more, difficult to deal with the problem. Curing temperature is too high or curing time is too long. Once the temperature of silicone products is too high, it will lead to numbness or brittleness after forming, which has a great impact on the subsequent edging. Long curing time is also one of the main reasons for brittle products. Vulcanization temperature is too low or vulcanization time is too short, vulcanization temperature is too low, vulcanization time is too short will also have a certain impact on the edge, silicone rubber products have a strong flexibility when not completely vulcanized, so it is difficult to remove the rough edge and product separate. From the production to solve these fundamental problems, we believe that the problem of silicone rubber products with rough edges can be well solved.

Most silicone rubber products are inflammable. By adding flame retardant filler and flame retardant filler and blending with flame retardant material, the flame retardant property of synthetic silicone materials can be improved. In addition, the introduction of ignition monomer in polymerization reaction is also an effective method in flame retardant process, and improving the crosslinking density of silicone rubber products is also beneficial to flame retardant. Next, a brief introduction - the flame retardant technology. 1.hydrocarbon Vertical rubber includes NR,SBR, BR,lIR, EPR, EPDM, etc. Although NBR does not belong to the vertical class, its flame retardant technology is very similar to that of the vertical class, so it is classified as synthetic silicone rubber treatment. The oxygen index of C-silicone rubber is between 19 and 21, and the thermal decomposition temperature is between 200 and 500° C. The heat resistance and flame retardant properties of C-silicone rubber are generally poor, and the decomposition products of combustion are mostly flammable gases. The common methods of this silicone rubber fire prevention are as follows: By blending with polyvinyl chloride, gasified polyethylene, chlorosulfonated polyethylene, vinyl acetate and other polymers, the flame retardant property of vertical silicone rubber can be improved appropriately, so as to improve the flame retardant property. Attention should be paid to the mixing ratio and co-crosslinking of blends. Adding flame retardants to vertical silicone rubber is an important way to improve its flame retardancy, and the synergistic effect of flame retardants is further improved. The common flame retardants are mainly halogenated flame retardants, mainly perchlorocyclopentane, decabromodiphenyl ether and chlorinated paraffin. Among them, antimony is the main inorganic flame retardant, followed by zinc borate, alumina hydrate, ammonium gasification and so on. In use, it should be noted that free halide flame retardants cannot be contained, because in the process of processing, free halide will corrode equipment and molds, and have an adverse effect on the electrical and aging properties of silicone rubber. In addition, attention should be paid to the adverse effect of the amount of flame retardant on the mechanical properties of silicone rubber. Add flame retardant inorganic filler, such as calcium carbonate, clay, talc, white carbon black, aluminum hydroxide, etc., to minimize the ratio of flammable organic matter. Calcium carbonate and alumina nitride have endothermic effects during decomposition. This will make some physical and mechanical properties of the rubber material decline, the filling amount can not be too large. Through the experiment of increasing the crosslinking density of silicone rubber, it is proved that increasing the crosslinking density can increase the oxygen index. So as to improve the flame retardant property of silicone rubber. The reason lies in the increase of thermal decomposition temperature of rubber. This method has been used in the production of ethylene-propylene silicone rubber. 2.halogenated rubber Halogenated gels contain halogen elements, and their oxygen index is generally between 28 and 45, and the -Fpm oxygen index even exceeds 65. The higher the halogen content of common halogenated silicone rubber, the higher the oxygen index; This silicone rubber itself has a high flame retardant, can be out of the fire. So its flame retardant treatment is simpler than light rubber. In order to improve the flame retardancy of halogenated silicone rubber, flame retardants are often added. 3.composite chain glue The most representative silicone rubber is dimethyl silicone rubber, its oxygen index is about 25, the thermal decomposition temperature of 400~6001. The actual flame retardant way is to increase the thermal decomposition temperature, increase the residue in the process of thermal decomposition, and slow down the generation rate of combustible gas.  

Silicone accessories are widely used in machinery manufacturing, especially automotive silicone accessories, which have many kinds and wide uses. Many cars have window buttons, mirror buttons, lumbar support buttons, navigators, and buttons for playing music and adjusting air conditioning. These are silicone buttons. Silicone has a corresponding elasticity. You need to calculate the weight of the spring force. The elasticity of each car may vary, but the effect is the same. But in the car, it's kind of like you. In addition to the keys in the car, the car accessories and sealing rings and silicone sealing products, common is our car after a period of driving or a few kilometers of maintenance, maintenance personnel is not the car up to turn on the fuel tank to put out the old oil? And it won't cause an oil spill? This is because of the silicone waterproof seal inside. Of course, there are silicone seals/rings in other places, such as glass water tanks, pressurized water tanks, steering wheels, engines, etc. It's just that we rarely see it. Although they are located in different locations, they have the same function. They are used for oil -, water - and leakage-related seals. Auto sealing rubber strip, good elasticity, anti compression deformation, anti aging and so on. The main role of the silicone tube is to transport oil and water. Silicone shock cushion, the role of these auto accessories is generally reflected in: sound insulation, noise reduction, waterproof, dustproof, shock absorption, etc.

Doors and Windows sealing strips are mainly used in aluminum alloy doors and Windows, plastic steel doors and Windows, wood doors and Windows and other architectural decorative doors and Windows. Door and window seals on the market. It is generally made of PVC, modified PVC, EPDM, elastomer seal (including TPV, TPE, TPR, SEBS), silicone and other materials. Doors and Windows sealing strips can be used in a variety of plastic steel doors and Windows and broken bridge aluminum doors and Windows, as well as some wood doors and Windows, can play an important role in fire prevention, wind proof, waterproof, dustproof, energy saving, sound insulation, anti-freezing, sealing, warm. 1.Rubber material Doors and Windows sealing strip rubber material windproof effect is relatively good processing is relatively simple, its color is rich consumers can freely choose to use the probability of high although the rubber material has some taste, but its elasticity and durability and windproof is very good. 2.Silicone material Silicone material doors and Windows sealing strip is better, it belongs to a kind of new sealing material, not only the heat resistance is particularly good, but also its elasticity is very good, plasticity is also very good for a wide range of application. 3.PVC material PVC material stability and wind performance is very good, the use of a long time will not appear yellow phenomenon, become the representative of the classic material.  

Before silicone kitchenware mildew phenomenon, we should first find the problem of mold to prevent it. In addition to the influence of climate, the main cause of mold also includes some additives in silicone raw materials, such as silicone oil, color powder, curing agent, etc., which are the main nutritional components of these molds. Mold growth causes the plant protein carbohydrates in the silicone rubber to be eroded. In addition, due to the electrostatic action of silicone rubber's inert rubber, impurities in the air are adsorbed on the surface of the product, which can also lead to mold growth. General silicone products manufacturers should consider these factors, so the mildew phenomenon in silicone kitchenware, in addition to raw material factors, mainly depends on their own control, silicone kitchenware can be kept in a ventilated place to keep clean after cleaning, silicone products after cleaning, according to the difference in temperature and humidity, choose to dry 1-2 hours, in order to facilitate the gap dry, will not cause mildew. After mold, you can wipe with alcohol. If it is difficult to solve several methods, can be treated with mildew. Anti-mold agent should have high thermal stability. Good weather resistance low volatility and good material compatibility characteristics. Also, you should choose a safer variety for the human body.

Oil injection is softener, viscosifier, lubricant, plasticizer and other liquid compound separated in the rubber surface, and form a layer of oil. In practice, the way the rubber is sprayed is sometimes presented in one way, and sometimes in two or three ways together. (1) Improper formula planning: Full ejection: commonly seen in sulfur, accelerator, active agent, antioxidant relocation ejection: commonly seen in processing AIDS, relocation antioxidant. Antistatic agent generation ejection: often seen in sulfur vulcanization system accelerator and reaction product reaction stay: often seen in organic peroxide vulcanization system low molecular material excessive stress ejection: often seen in inorganic filler: such as calcium carbonate. (2) Improper technical operation (3) The quality of raw materials is shaken because of different raw materials of origin, different manufacturing methods, different technologies, different batches of raw materials are very different (4) poor storage conditions temperature: the solubility of the compound in rubber is usually followed by the rise and fall of temperature (5) The aging of rubber mostly causes damage to the balanced network structure of vulcanized rubber intact, and then also damages the rubber system of various complexes and raw rubber molecules and the chemical or physical relationship between the complex, reducing the solubility of the complex in the rubber system. As a result, those parts in the full condition of the compound will be separated from the rubber free, forming the spray cream.

The color adjustment of silicone products is very important in the production. For the color adjustment and color matching work, the operator needs to have keen color vision and rich operating experience. In the whole process of color mixing, follow the principle of light and dark, and flexibly use a variety of color masters in the process of color mixing. The color matching in the color matching box of silicone products is two different color concepts. The color matching is that we first have the target color, and then according to our own experience to match the color, the color matching of various color masters in proportion, and then match the products close to the target color. The color matching is to adjust the existing color to the products close to the target color. The color operation between two people must be based on the change of color to do lag, and different colors need to be formulated from the beginning and refreshing color change, for the silica gel product color box color work is to facilitate the operator has rich operating experience and good color resolution ability, by its flexible use according to the understanding of a variety of color master. In addition, the whole process of color matching must be based on the slow conversion from light to dark, and each time of color matching and blending requires corresponding recorded data. It is necessary to know that sometimes the data is accurate, and record the lecher component until the actual color is close to the target color, it is also necessary to summarize the good formula of color matching and blending and record it to facilitate the accumulation of effective data next time. Shorten the time of color matching. Silicone products in the process of color mixing should pay attention to each other's achromatic application, the so-called achromatic is the use of two kinds of dyeing each other subtractive characteristics, such as a kind of blue with red light, if the red light is too heavy products are not qualified, can add a small amount.

For industrial manufacturing industry, every product has bad probability in the manufacturing process, silicone rubber molding process is no exception. In the process of production and processing, products are often due to the technology is not in place, equipment conditions do not match, affected by geographical environment and other different factors. However, there are too many bad factors in solid silica gel molding process. In order to control its quality, besides the technical level, other methods must be paid attention to. Human, machine, material, environment and hair are the core characteristics of solid silicone rubber products industry. Every silicone rubber manufacturer will control defective products through these aspects, such as personnel operation, machine parameters, material quality, environmental impact, method use, etc. And each method will have some effect on different products. Product inflation is the most common phenomenon. Encapsulation is also called internal encapsulation and external encapsulation. In the process of mold closing, the air in the mold cavity remains in the center of the product and is difficult to discharge. After molding, due to the low density of silica gel, it is difficult to overflow from the silica gel, resulting in bulging phenomenon. After forming the surface of small bubbles, resulting in local immature phenomenon. There are many reasons for this undesirable phenomenon, among which the exhaust and vulcanization time of the machine are the main factors. Generally, this adverse phenomenon may appear in any product, so the edge explosion mainly occurs in some products centered on the parting line, different hardness and structure may cause the edge explosion. The main factor causing this problem is that the feed groove in the mold is too small, resulting in the air in the mold cavity can not be discharged, and the air outlet can only be found from the parting position, resulting in the phenomenon of silica gel products bursting up and down. At present, it is easy to appear in a lot of heavy silica gel articles and products with low hardness. The control method is to start from the mold as much as possible. It is the main factor of the appearance of silicone rubber products. Many consumers come because of its appearance, so the appearance quality and the effect of the mold surface must be exquisite. In the silicone industry, the main adverse phenomenon of surface appearance is that black spots are the majority of impurities. For products with obvious colors, it is easier to expose their appearance quality stars. Appearance has a certain impact on the environment, which is closely related to the cleanliness of workshops, machines and materials. So the star in all aspects of the environment, more can reflect its quality! Finally, poor functionality. Many silicone seals and silicone decorative accessories require significant structure and hardness to support their function. For example, the hardness does not meet the requirements, the product function does not meet the requirements, the structure has problems, the sealing and assembly of the product is not in place, the appearance and function is poor. This factor requires silicone rubber product manufacturers to combine the actual function of the product in the early proofing proofing, hardness and structure evaluation is OK before opening the mold production.