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View relevant certifications and labels Certification Mark: Food grade silicone rubber products usually have relevant certification marks, such as FDA certification in the United States and LFGB certification in the European Union. These certifications are an important basis for products to comply with food contact safety standards. If the product claims to be food grade silicone rubber, the merchant can be required to provide relevant certification certificates or check whether there is a corresponding certification mark on the product packaging. Product identification: Legitimate food grade silicone rubber products will be clearly labeled with the words "food grade" on the product itself or packaging, and may also indicate information such as material composition, temperature range of use, and applicable scenarios.   Observe appearance and texture Color: High quality food grade silicone rubber usually has a uniform and natural color, with no obvious color difference. If it is a transparent silicone rubber product, it should have high transparency, no turbidity, bubbles or impurities; If there are colored products, the color should be bright and stable, and there should be no fading phenomenon. Odor: Food grade silicone rubber itself has a small odor and almost no obvious pungent smell. If silicone rubber products have a strong pungent, rubbery, or other odor, they are likely not food grade or have quality issues. Texture: Touched by hand, food grade silicone rubber has a soft, smooth texture, good elasticity, comfortable hand feel, and no rough, sticky or prickly feeling. After pressing firmly, silicone rubber can quickly return to its original state without leaving obvious indentations or deformations.   Conduct simple performance testing Heat resistance test: Food grade silicone rubber generally has good heat resistance. Silicone rubber products can be tested in a high-temperature environment, such as heating at a temperature of 120 ℃ -200 ℃ for a period of time (be careful not to exceed the maximum operating temperature indicated on the product label), to observe whether they will deform, melt, produce odors, or release harmful substances. If there is an abnormality, it is likely not food grade silicone rubber. Waterproof immersion test: Soak silicone rubber products in water and observe whether they will swell, discolor, emit odors, and other phenomena. After soaking in water, food grade silicone rubber should have relatively stable performance and not cause water pollution. Flexibility test: Food grade silicone rubber has good flexibility and elasticity, and can be bent, twisted, and other operations on products to observe whether it is easy to break or crack. High quality food grade silicone rubber can maintain good performance even after repeated bending and twisting.   Understand the source and brand of the product Purchasing channels: Choose legitimate purchasing channels such as large supermarkets, mother and baby specialty stores, official flagship stores, etc. The products sold through these channels usually undergo certain quality screening and auditing, which provides greater assurance. Brand reputation: Renowned brands and manufacturers with good reputations usually pay more attention to product quality and safety, and have stricter production processes and quality control. You can learn about it by examining product reviews, brand history, and reputation.

Many people have used silicone protective covers, but have you ever thought that it will affect heat dissipation?   You may have thought about this question before, but in today's life, silicone protective covers are commonly used items, especially for our phones. They not only have various patterns or texts, but also can elevate the level of our phones. But will silicone protective covers affect the heat dissipation of our phones?   This is a thought-provoking question, because as we all know, silicone is a very sealing material, so the silicone protective cover will naturally affect heat dissipation, making the phone hotter and more hot, which is a very bad experience.   Actually, everyone doesn't need to worry too much because the heat of the phone itself is not too high, and its operating activity is relatively small. If we look at this problem from the perspective of heat dissipation, it is affected. However, from its practical application, it can be seen that the silicone protective case does not have much impact. At least the heat of the phone is not enough to heat up to the point of heat dissipation. Unless you are playing games and charging while playing all day long, I think it's surprising that your phone is not hot. Even if you don't use a silicone protective case, it is still very hot because your phone consumes a lot of electricity and runs at high speed. In such a situation, I can draw a conclusion that your phone is probably not hot. We need to change it.   If we don't use silicone protective covers, it will undoubtedly be a kind of harm and a decrease in grade for mobile phones. Without protective covers, it is estimated that the appearance of mobile phones will be affected by friction and damage from different situations and factors. So, do you think it is because silicone protective covers have a greater impact on heat dissipation or because mobile phones are more damaged?

How to avoid oxidation of silicone products, silicone products are widely used in various fields because of their excellent heat resistance, chemical resistance and good physical properties. However, silica gel products may oxidize in specific environments, affecting their performance and service life.   1. Choose high-quality silicone materials   High quality silicone materials typically have strong antioxidant properties. When selecting silicone products, it is advisable to choose reputable manufacturers and suppliers to ensure the quality of the materials. High quality silicone gel will add antioxidants during production and processing to enhance its antioxidant capacity.   2. Avoid contact with oxygen   The oxidation of silicone products is mainly caused by contact with oxygen. Therefore, when storing and using silicone products, their contact with oxygen should be minimized as much as possible. For example, silicone products can be stored in sealed bags or containers to reduce the invasion of oxygen.   3. Avoid exposure to ultraviolet radiation   Ultraviolet radiation can accelerate the oxidation process of silicone products. Therefore, during storage and use, silicone products should be avoided from being exposed to sunlight or strong ultraviolet radiation. If outdoor use is required, sunshades or other protective measures can be considered.   4. Control environmental temperature and humidity   High temperature and humid environments can accelerate the oxidation rate of silicone products. Therefore, silicone products should be stored in a dry and ventilated environment to avoid the effects of high temperature and humidity. Meanwhile, avoid exposing silicone products to air-conditioned rooms or high-temperature environments for extended periods of time.   5. Regular inspection and maintenance   Regularly inspect the use of silicone products and promptly detect signs of oxidation. If oxidation phenomena such as discoloration, cracking, or hardening are found on the surface of the product, it should be stopped from use in a timely manner and appropriate maintenance measures should be taken. For slightly oxidized silicone products, their service life can be extended by cleaning and applying a layer of protective agent.   6. Use antioxidants   For some silicone products with high requirements, it is possible to consider coating the surface with a layer of antioxidant. Antioxidants can form a protective film to prevent oxygen and ultraviolet radiation from corroding silicone products.   Avoiding oxidation of silicone products requires consideration from multiple aspects, including selecting high-quality silicone materials, reducing contact with oxygen and ultraviolet radiation, controlling environmental temperature and humidity, regular inspection and maintenance, and using antioxidants. By taking these measures, the service life of silicone products can be effectively extended and their good performance can be maintained.

The following is to introduce the six major processes of silicone products:   1.Molding Die molding, this production process is the most common. Mainly completed by the mold, mold shape determines the shape of the silicone product. Molded silica gel products are usually through the high temperature mold in the addition of vulcanizing agent solid silica gel raw materials through the vulcanization machine pressure, high temperature sulfur into solid molding, molded silica gel hardness is usually 30°C-70°C This production process is relatively simple, suitable for all silicone products.   2.Injection (injection) This process is relatively high quality requirements, is the combination of liquid silicone and plastic. The product has good thermal stability, cold resistance, excellent electrical insulation performance, and does not produce toxic substances when burning. Therefore, it has become an irreplaceable material in the production design of health products, automobiles, baby products, medical supplies, diving supplies, kitchen utensils and seals.   3.Extrusion Extrusion molding, extrusion silicone products are usually extruded by extrusion machine silicone molding, generally extrusion silicone shape is long, tubular can be cut at will, extrusion art to make the product shape is relatively single, mostly strip. Silicone tubes are widely used in medical and mechanical equipment fields. It can also be used as a buffer in packaging materials.   4. Rolling Silicone rubber is kneaded and mixed with silica black, silicone oil, etc., and then rolled out sheet. The physical and mechanical properties of the film made by calendering are obviously different from those of the horizontal and vertical films, which is called calendering effect. The specific performance is that the longitudinal tensile strength of the film is greater than that of the horizontal, the transverse elongation of the film is greater than that of the vertical, and the longitudinal shrinkage of the film is greater than that of the horizontal. The calendering effect is the result of the orientation of macromolecule and acicle and sheet compound in the calendering process. The size of the calendering effect is related to the composition of the compound, calendering temperature, speed and speed ratio. For larger products, such as silicone sheets, silicone sheets.   5. Infusion Perfusion mold or perfusion mold operation method: perfusion mold or perfusion mold, is used for relatively smooth or simple products, there is no mold line to save labor and time, that is, the product or model you want to copy, surrounded by rubber plate or glass plate, the vacuum of silicone directly into the product above, after the silicone dry molding, take out the product, the mold is formed (Note: The injection mold is generally made of silica gel with relatively soft hardness, so that the demoulding is easier and will not damage the products inside the silicone mold. It is a combination of solid and liquid, using products such as mobile phone covers, luggage covers and so on.   6. Coating Rapid vulcanization; Strong adhesion; Good fluidity, easy to defoam. The use of platinum complex catalysis, non-toxic, no odor; Excellent thermal stability and cold resistance (use temperature -60℃ ~ 200℃) after forming with good permeability, heat resistance, and a certain tensile strength; Excellent anti-skid performance; No pollution; Low hardness; The planting adhesive is firmly bonded. High tear strength; High transparency; Good tensile properties. Wear resistance, wash resistance, high temperature resistance; High three-dimensional level, fabric smooth, soft, flexible excellent texture, good elasticity. Washable and dry cleaning resistant. When applied to the cloth, it has the effect of anti-aging. Such as silicone gloves, rain shoes and so on.

In our daily life, silicone products and rubber products are everywhere, but can you easily distinguish them? Today, let's take a look at how to distinguish silicone products and rubber products!   First, let's have a look at the appearance. Generally speaking, the color of silicone products is relatively bright, the transparency is relatively high, and it looks more smooth and delicate. And rubber products, the color is often not so bright, the surface is relatively rough. And feel their hands. Silicone products feel soft, comfortable and elastic, just like giving your hands a gentle massage. Rubber products are relatively hard and may not be as resilient. Second, in terms of smell, silicone products usually have no pungent taste and are relatively mild. Rubber products may not necessarily, sometimes there will be a strong rubber smell. Third, from the material characteristics, silica gel has better high temperature and low temperature resistance. Under extreme temperature conditions, silicone products can still maintain good stability and flexibility. In contrast, the performance of rubber products in terms of temperature adaptation is slightly inferior.   Fourth, in terms of price, due to the superior performance of silicone and the relatively complex production process, the price of silicone products is usually higher than that of rubber products. Fifth, silicone products because of its good high temperature resistance, low temperature resistance, aging resistance, non-toxic and tasteless and other characteristics, often used to make food contact products, such as silicone baking molds, silicone pacifiers and so on. In the medical field, silicone also plays an important role, such as silicone catheters, silicone prosthetics and so on. In addition, silicone is also commonly used in protective covers for electronic equipment, such as mobile phone silicone covers, computer keyboard protective film and so on. In the beauty industry, beauty tools made of silicone, such as silicone cleansing brushes, are also popular. Sixth, rubber products, with its good elasticity and wear resistance, are mostly used in the manufacture of tires, which is one of the most common and important applications of rubber products. In the industrial field, rubber seals, rubber conveyor belts and so on are also indispensable. In daily life, rubber gloves, rubber soles and so on are also common rubber products. At the same time, rubber is also widely used in sporting goods, such as basketball, football, rubber track and so on.   Therefore, to distinguish silicone products and rubber products, we need to observe the appearance, feel the hand, smell the smell, and combine some professional knowledge. In this way, we can distinguish them at a glance among many products!

In today's era of increasing personalized demand, silicone products are widely used in all walks of life because of their excellent physical properties, chemical stability and environmental protection characteristics. From tableware and water cup covers in daily life, to protective sleeves and sealing rings in electronic products, to catheters and equipment accessories in the medical field, silicone products are everywhere. However, for customers who want to customize silicone products, a common problem is the problem of the minimum order quantity. So, how much is the general MOQ of silicone product customization?   Silica gel products customized MOQ requirements The MOQ of customized silicone products is not static, it is affected by a variety of factors, including but not limited to product complexity, mold costs, production processes and manufacturer policies. In general, the minimum order quantity of customized silicone products ranges from several hundred to several thousand pieces, but the specific number needs to be negotiated according to actual needs.   Product complexity Product complexity is one of the key factors affecting MOQ. If the custom silicone product structure is complex, such as containing multiple parts, fine texture or complex mold structure, then the development and production costs of the mold will increase accordingly. To spread these costs, manufacturers often set higher MOQs. On the contrary, for silica gel products with simple structure and low mold cost, the MOQ may be relatively low.   Mold cost Mold is the core tool for the production of silicone products, and its cost directly determines the production cost and minimum order quantity of the product. In general, the development cost of molds is high, especially for complex molds. Therefore, in order to reduce the impact of mold costs on product prices, manufacturers usually set a higher MOQ to apportion mold costs. However, with the progress of mold technology and the intensification of market competition, some manufacturers will also provide mold sharing or leasing services to reduce the minimum order threshold of customers.   Production technology The production process is also an important factor affecting the MOQ. The production process of silicone products includes injection molding, extrusion, calendering and other ways, each way has its specific production efficiency and cost. For example, the injection molding process is suitable for the production of silicone products with complex structures and high precision requirements, but the production efficiency is relatively low, so the MOQ may be relatively high. The extrusion process is suitable for the production of long or tubular silicone products, high production efficiency, the MOQ may be relatively low.   How to reduce the MOQ of silicone product customization?   For customers who want to reduce the minimum order amount of silicone products, they can start from the following aspects:   Choose the right manufacturer: Choose a manufacturer with rich production experience and advanced production equipment, which can reduce the production cost and the minimum order quantity threshold.   Optimize product design: By optimizing product design, simplify product structure, reduce mold development costs, thereby reducing the MOQ.   Bulk purchase: If conditions permit, you can consider purchasing with other customers or partners to reduce the MOQ in bulk purchase.   Long-term cooperation: Establish long-term cooperation with manufacturers, reduce the MOQ requirement of a single order through continuous and stable orders.

What to do if the silicone product is not good for release: In the production process of silicone products, the release of silicone products is the most important step, no matter who more or less will encounter the problem of difficult release, such as the problem of difficult release is very serious, which will seriously affect the production efficiency of silicone products, then how to solve the problem of difficult release?   1. Mold surface treatment The molding mold of silicone products should be cleaned before the oil pressure molding machine, especially the new mold that has just been unloaded must be sandblasted first. Choose different detergents for mold. The sandblasted mold must be heated to a sufficient temperature before placing the mold, and the release agent must be sprayed well before forming. It is worth noting that the electroplating mold cannot be sandblasted, including resin sand.   2. Spray treatment In the molding process of silicone products, silicone products do not stick to which side of the mold, nor do they stick to which mold spray, but sometimes it is difficult to stick. Solution: Spray bottle or other clean water, if you want the product to stick, after spraying, the product will stick where you want it to stick.   3, mold temperature adjustment The product likes to stick to the lower half of the mold temperature. When the upper mold temperature is 175℃ and the lower mold temperature is 165℃, the product is usually stuck to the lower mold when the mold is lifted. In short, when the silicone product is difficult to release, do not replace the release agent with a better release agent, in order to facilitate drawing, or increase the use of release agent and frequency of use, too much release agent is easy to cause dirt on the surface of the mold, light will have a certain impact on the appearance of the product, the use of too much release agent will also affect the later screen printing, injection oil adhesion ability. If the above method is not very good, you can consider adding an appropriate amount of internal release agent when preparing the material, but it will increase the additional cost of the product.   How to release silicone products quickly Silicone manufacturers know that the more modules they can do in a day, the less the corresponding cost. The lower the unit price of silicone sleeve, the more obvious the price advantage. Silicone products factory Begit silicone products, as well as the secrets revealed by customers, silicone sleeves in order to improve the release speed, there are these methods. 1. After refining raw materials, adding release agent and rapid curing agent, the fluidity of silicone casing is stronger, and the original 200-second silicone casing can shorten the molding time by 30% under the same temperature and pressure. 2. The silicone products factory adjusts the temperature and pressure of the machine, usually the higher the temperature, the faster the formation time of the silicone sleeve, but too high the temperature will also produce the situation of explosive edge. 3. Reduce the number of exhaust of the machine, exhaust die up and down, mold speed is slow. If the silicone jacket is not particularly complex, the exhaust can be reduced twice. 4. The silicone products factory should work hard on the mold, open several more discharge cans, and let the rest of the materials come out. If the number of silicone sleeve is large, you can choose to open several more holes on the large mold to increase the output of each mold.

Silica gel products are mostly made of silicone rubber, forming process is also mostly hydraulic molding, the lower the hardness is not only conducive to the product of the swing material, but also because of its semi-fluid internal structure in the process of high temperature vulcanization bubbles, so we choose this kind of product silica gel material requirements are very high, but also must use the best vulcanizing agent, The solution is to increase the power of the vacuum machine and improve the mold structure.   The toughness and elasticity of silicone products are very good, not easy to deformation due to external forces, and there will be a layer of greasy substances on the surface layer, so it will feel smooth to the touch. It is mainly used in construction machinery, automobiles, electronic products, household appliances, toys, medical treatment, sports equipment ………… And other industries, with shock absorption, sealing, anti-static, high and low temperature resistance, wear resistance, flame retardant, acid and alkali corrosion resistance.   The adsorption of silica gel is mainly physical adsorption, which can be regenerated and used repeatedly. Add acid to the alkali metal silicate (such as sodium silicate) solution to acidify it, and then add a certain amount of electrolyte to stir, that is, to generate silica gel.   Or adding acid or ammonium salt to a concentrated sodium silicate solution can also produce silicic acid gel. Silica gel is left for a few hours to age, then washed with hot water to remove soluble salts, dried at 60 ~ 70 ° C and activated at about 300 ° C to obtain silica gel.   Under normal circumstances, the hardness of silicone products is 30-80°, which is also an ordinary silicone hardness, suitable for most of the production of silicone products. Let's take the silicone tube as an example: silicone tube, also known as silicone hose. Used as liquid, gas and other material flow and coating carrier. Hardness: 70±5, tensile strength: ≥6.5

1. Brief introduction of hot pressing process Hot pressing is a common process in the production of silica gel products, which mainly uses high temperature and pressure to convert solid silica gel raw materials into the desired shape. The process is complex and requires precise control of parameters such as temperature, pressure and time to ensure product quality and performance.   2. Hot pressing process   Raw material preparation: Select the appropriate silica gel raw material, usually milky white block. According to product requirements, add curing agent (ripening agent) and other additives, such as master color, luminous powder, phosphor, etc.   Rubber mixing: Put the prepared raw materials and additives into the rubber mixing machine, usually the rubber mixing time is about 30 minutes. This step ensures an even mixture of raw materials and additives.   Cutting material: The mixed silica gel raw material is cut to the required size to facilitate subsequent hot pressing.   Wake up: Put the cut silica gel raw material on the wake up rack for a period of time, usually about 8 hours. This step helps the air bubbles in the raw material escape and ensures the compactness of the finished product.   Hot press forming:   Put the awakened silica gel raw material into the mold of the hot press vulcanizer.   Heat the mold to a set temperature, usually between 130°C and 160°C.   Pressure is applied to fill the mold cavity with silica gel.   Maintain a certain pressure holding time, so that the silica gel is fully vulcanized.   Vulcanization: At the same time of hot pressing, the silica gel raw material will be vulcanized to form a stable rubber-like substance.   Inspection: The silicone products after molding need to carry out strict quality inspection, including inspection of appearance, size, performance and so on.   Edge removal: the qualified product is removed from the mold, and the excess raw edge and residual material are removed.   Post-treatment: According to product requirements, surface oil injection, printing, engraving and other subsequent processing.   Final inspection: The final inspection of all post-processed products is carried out to ensure that each product meets the quality standards.   Packaging: The qualified products are packaged and ready for shipment.

How many degrees of high temperature can silicone products withstand, silicone products with its excellent high temperature resistance and widely used in various industries. We will discuss the high temperature resistance of silicone products to help you understand the performance of this material in high temperature environments.   1. High temperature resistance of silicone products Silica gel, as a polymer material, has excellent high temperature resistance. It can maintain stability in high temperature environment and is not easy to age, so it has been widely used in aerospace, automobile manufacturing, electronic appliances and other fields.   2. High temperature resistance of silicone products Under normal circumstances, the highest temperature that silicone products can withstand is about 200°C to 250°C. However, the specific degree of temperature resistance will vary depending on the formula, production process and use of silica gel. Solid silica gel: high temperature resistance is good, usually can withstand 200°C to 250°C high temperature. Liquid silicone: high temperature resistance is relatively weak, usually can withstand 150°C to 200°C high temperature.   3. Factors affecting the high temperature resistance of silicone products Material formula: Different formulations of silica gel, its high temperature resistance will be different. Production process: vulcanization, molding and other processes will affect the high temperature resistance of silica gel. Use environment: in a high temperature environment for a long time, the high temperature resistance of silicone products may be affected.   4. How to improve the high temperature resistance of silicone products Choose the right high temperature silica gel raw materials: Choose the silica gel raw materials with good high temperature resistance. Optimize the production process: the use of advanced vulcanization, molding process to improve the high temperature resistance of silicone products. Add high temperature resistance additives: Add high temperature resistance additives to the silica gel formula to improve its high temperature resistance.   The high temperature resistance of silica gel products makes it widely used in various high temperature environments. Understanding the high temperature resistance of silicone products helps us to better choose and use this material. Through the introduction of this article, I believe that you have a more in-depth understanding of the high temperature resistance of silicone products.