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

The high temperature resistance of silicone comes from its unique molecular structure of polydimethylsiloxane. The Si-O-Si bond energy of the main chain is much higher than that of the C-C bond of ordinary rubber, and its thermal stability is extremely strong. Secondly, the molecular chain has flexibility and forms a protective effect by connecting with organic side groups, making it difficult to decompose and deform in high temperature environments, and able to maintain good elasticity for a long time.From the perspective of temperature resistance, silicone can be divided into multiple grades. Conventional silicone can be used for a long time at temperatures ranging from -60 ℃ to 200 ℃, and can withstand high temperatures of up to 250 ℃ in the short term. Modified high-temperature silicone can meet the needs of general scenarios such as daily kitchen utensils and ordinary seals. Its long-term temperature resistance can be increased to 200 ℃ to 250 ℃, and it can reach 300 ℃ in the short term. It is suitable for industrial scenarios such as automotive engines and high-temperature steam equipment. Special high-temperature silicone can be modified with benzene, fluorosilicone, or filled with ceramics. Its long-term temperature resistance can reach 250 ℃ to 300 ℃, and its short-term peak can even exceed 350 ℃. It can cope with extreme high-temperature conditions such as aerospace and firefighting equipment. In addition, the actual temperature resistance of silicone is also affected by the purity of raw materials, production process, and usage environment. It is worth mentioning that high-quality silicone can be further improved in temperature stability through secondary vulcanization process, reducing deformation and odor problems at high temperatures. Overall, the temperature resistance of silicone materials is not limited to a single temperature range, but can cover various scenarios from daily to extreme.

How to ensure details in customized silicone parts? Silicone parts are quietly integrated into daily scenarios such as medical devices, household small items, electronic devices, etc. due to their flexible touch, temperature resistance, and chemical stability. When standard components are difficult to fit unique structures or functions, customization becomes a natural choice. However, from a requirement description to the final product in hand, material selection, process refinement, and detail confirmation are interrelated. A slight negligence may affect the fit and service life of the parts. The starting point of customization is to clearly 'translate' the requirements into technical language. When communicating with suppliers, it is necessary to clarify the usage environment: whether it comes into contact with humans or food? How much pressure can you bear? What is the working temperature range? For example, baking molds need to withstand high temperatures of 230 ℃, while therapy equipment handles focus on softness and slip resistance. Attaching a diagram or physical reference can significantly reduce misunderstandings and pave the way for subsequent steps.Material selection is like "qualitative" analysis of a component. Silicone hardness is indicated by Shore A, and can be adjusted as needed, ranging from jelly like softness to slightly elastic solidity. Colors are not limited to basic colors, but can also be customized with textures such as matte and semi transparent. If there are special requirements involved, such as medical grade biocompatibility or food contact certification, they must be explained in advance. The supplier will provide samples of the corresponding materials for touch and confirmation, and it is safe to see them by hand.Design and molds are the soul of customization. Engineers will optimize the details of the drawings: adjust the demolding angle, ensure uniform wall thickness, and avoid shrinkage or burrs during production. The precision of the mold directly determines whether the contour of the part is smooth. The samples produced during the trial stage need to be personally inspected to ensure their size is accurate? Is the edge rounded? Is the assembly smooth? The patient confirmation in this step can effectively avoid regrets after mass production.The production process emphasizes the importance of heat and moderation. Liquid silicone injection is suitable for precision small parts, while solid-state molding is used for slightly larger structural parts. Temperature, pressure, and vulcanization time need to be strictly controlled. Quality control runs through the entire process: randomly check the size, carefully inspect the surface for bubbles, impurities, or color differences. The finished product is individually packaged after gentle cleaning, especially in areas with high cleanliness requirements, where every step shows respect for details.Occasional minor situations can also serve as opportunities for communication. If the edges of the sample are slightly rough, it may be due to mold trimming or fine-tuning of process parameters; Color deviation requires checking the color card and sampling records. Honest communication and joint analysis often lead to quick solutions. Choosing a partner who is patient in communication and has solid experience will make the customization process smoother and more secure.

Why is silicone prone to static electricity?Silicone is an excellent insulating material, and its charge is difficult to dissipate. Conditions such as friction, peeling, and dry environments can cause static electricity to rapidly accumulate. The problems caused by static electricity are very significant. Products are prone to dust adsorption, electronic components may be affected by static electricity interference and have unstable performance, and precision assembly and packaging processes may also be affected by static electricity, affecting the product's qualification rate. Therefore, possessing anti-static function has become a necessary condition for high-quality silicone products.The mainstream anti-static methods for silicone products:The commonly used anti-static paths in the industry are mainly divided into three categories: internal addition type, surface treatment type, and production environment control. Different schemes are applicable to different scenarios and usage period requirements. 1. Production and Environmental Control of Static ElectricityWorkshop humidification, use of ion air rods, and adoption of anti-static packaging and other auxiliary measures can further reduce the risk of static electricity.2. Surface coating treatment: fast onset and controllable costSpray anti-static coating, tactile oil, and anti-static liquid on the surface of the finished product to form a conductive layer to quickly eliminate static electricity. The advantage of this method is that it is flexible in process, does not change the physical properties of the substrate, and has a smoother appearance.3. Plasma surface modification: enhances polarity and reduces dust accumulationBy plasma treatment, the chemical polarity of the silicone surface can be changed to reduce the possibility of charge accumulation. If used in combination with anti-static agents, the effect is even better. This process is environmentally friendly and solvent-free, which can effectively improve cleanliness and anti sticking ability.4. Adding anti-static properties: Transforming from the root, ensuring long-term stability and effectivenessDuring the mixing stage, permanent anti-static agents, conductive fillers, and ionic additives are uniformly added to the silicone raw materials. After molding, a conductive network will form inside the material, which can quickly release charges.

People who have been in contact with the silicone industry or silicone products may know that food grade silicone is specifically designed for making food related products, non-toxic and harmless to the human body, and is a high-quality material. So, conversely, is non food grade silicone harmful to the human body? Today we will learn about ordinary silicone. In fact, ordinary silicone products are also non-toxic and harmless to the human body, but food related products have higher quality requirements and need to pass a series of tests such as LFGB, SGS, FDA, etc; However, ordinary silicone cannot guarantee passing all tests due to its auxiliary materials and characteristics. Therefore, the silicone industry distinguishes between two types of raw materials: industrial accessories and daily necessities use affordable ordinary raw materials, while medical food related materials use higher quality and more expensive food grade raw materials.

The color matching of silicone products is quite important in production. For color matching and color matching work, operators need to have keen color perception and rich operational experience. Throughout the color matching process, follow the principle of light to dark and flexibly use various color masterbatches. The color matching in the color box of silicone products has two different color concepts. Color matching is the first color that we have a target color, and then we use our own experience to match colors, proportionally match various color masterbatches, and then match products that are close to the target color. Color matching is the process of adjusting existing colors to products that are close to the target color. The color matching operation between two people must be delayed according to the changes in color, and different colors need to be formulated and refreshed from the beginning. For the color matching work of silicone product color boxes, it is necessary for the operator to have rich operating experience and good color discrimination ability, and to flexibly use them based on their understanding of various color masterbatches.And the entire color matching process must be based on a slow transition from light to dark colors. Each color matching and color adjustment requires corresponding data recording. It is important to know that sometimes the data is accurate. Record the amount of colorants until the actual color is close to the target color. Summarize the color matching and color adjustment formula and record it to facilitate effective data accumulation for the next time and shorten the color matching and color adjustment time. During the color matching process of silicone products, attention should be paid to the application of mutual color fading. The so-called color fading refers to the use of the characteristic of two dyes reducing each other. For example, if there is a blue color with red light, if the product with excessive red light is considered unqualified, a small amount can be added.

Many families use dishwashers to clean dishes, so some consumers are confused. If I am using silicone tableware or kitchenware, can I use a dishwasher to wash? For example, a silicone bowl is a high-temperature molded silicone product made of food grade silicone material, and the color can be freely selected and customized. The surface of the silicone bowl is smooth, the material is soft, waterproof, and will not scratch or tear when washed in the dishwasher.In fact, the vast majority of silicone products produced from silicone are washed with clean water, such as silicone bibs. If a baby gets dirty, add some detergent or cleaning solution, rinse with water, and the whole product will return to its fresh appearance when just bought.With the influx of a large number of silicone kitchenware into the market, more and more silicone kitchenware is widely used in households. Although porcelain bowls may look high-end, washing them in a dishwasher is still not as reassuring. The strong collision force can scratch or shatter the surface of the bowl. And silicone bowls won't worry about such problems. Silicone products have good temperature resistance and can normally withstand temperature tests ranging from -40 ℃ to 240 ℃. But silicone is relatively soft and will deform under pressure. Moreover, ordinary silicone products are easily damaged when in contact with sharp objects. If there are other sharp utensils in the dishwasher, they need to be sorted and placed properly to avoid damage caused by silicone products coming into contact with sharp objects during the dishwashing process. In short, it doesn't matter which layer silicone products are placed in the dishwasher, it depends on the placement of your utensils. As long as you pay attention to the classification and placement, there's no need to worry.

Silicone release agent is an indispensable auxiliary material in the production of silicone products, which can effectively reduce the adhesion between molds and products and ensure the quality of product molding. Different types of silicone release agents are suitable for different scenarios and have their own characteristics in terms of usage. When selecting, it is necessary to consider production needs and mold conditions. The following are the usage methods and characteristics of common silicone release agents: Material and Type1. Solvent based release agent: using organic solvents as carriers, containing effective ingredients such as silicone oil and wax, suitable for most silicone molds, especially for demolding complex shaped products.2. Water based release agent: Using water as a carrier, it has good environmental friendliness, low odor, and is friendly to operators and the environment. It is commonly used in production scenarios with high environmental requirements. 3. Solvent free release agent: It does not contain solvents and exists directly in solid or paste form. It needs to be uniformly attached to the surface of the mold by heating or applying tools, and is suitable for high-temperature molding processes. Basic usage steps (general process)1. Mold pretreatment: Before demolding, the surface of the mold needs to be thoroughly cleaned to remove residual silicone debris, oil stains, dust, and other impurities. Special mold cleaning agents or alcohol can be used to wipe the mold surface to ensure it is dry and smooth, and to avoid impurities affecting the adhesion effect of the release agent.2. Selection and dilution of release agent (if necessary): Select the appropriate type of release agent based on the material of the silicone product, the complexity of the mold, and the production process. Partial solvent based or water-based release agents need to be diluted according to the instructions to avoid excessive concentration causing oil stains on the surface of the product, or low concentration affecting the release effect.3. Uniform application: Manual application: Use a brush, sponge, or cloth dipped in release agent to evenly apply it to all surfaces of the mold cavity, including corners, grooves, and other details, ensuring no omissions or accumulation. Spray coating method: For large-area molds or mass production, a spray gun can be used to atomize the release agent and evenly spray it, paying attention to controlling the spraying distance (usually 30-50 centimeters) to avoid local excess.4. Drying and curing: After application, wait for the release agent to fully dry. Solvent based release agents generally need to be naturally dried or evaporated with hot air (avoiding direct exposure to high temperatures on the mold); Water based release agents can promote water evaporation through ventilation or low-temperature drying; The solvent-free release agent needs to wait for it to form a uniform film on the surface of the mold.5. Reuse and touch up: After a single demolding, if there is insufficient residual release agent on the surface of the mold, it should be promptly touch up. During continuous production, it is recommended to check the demolding effect every 3-5 molds, and decide whether to reapply based on the smoothness of demolding to avoid mold damage caused by ineffective demolding agents. Special precautions for different types of release agents1. Solvent based release agent: When using, it should be operated in a well ventilated environment, away from sources of fire, to avoid safety hazards caused by organic solvent volatilization; Operators are required to wear protective gloves and masks to reduce the risk of skin contact and inhalation.2. Water based release agent: After application, ensure that the mold is completely dry before pouring silicone, otherwise it may cause bubbles or pinholes on the surface of the product; If there is rust or oxide layer on the surface of the mold, it needs to be derusted first, otherwise the release agent is difficult to adhere.3. Solvent free release agent: The paste like release agent needs to be evenly scraped with a special tool (such as a scraper) to avoid uneven thickness; When forming at high temperatures, it is necessary to choose high-temperature resistant models to prevent the release agent from decomposing and failing at high temperatures. Effect judgment and adjustmentIf the surface of the product after demolding is smooth and flawless, the edges are intact, and there is no residual silicone in the mold, it indicates that the demolding agent is used correctly; If the product sticks to the mold, has surface scratches, or has excessive mold residue, it may be due to uneven application of release agent, incomplete drying, or improper selection of type. The mold needs to be cleaned again and the usage method adjusted. If pursuing efficient demolding, adapting to complex molds, and accepting the operating standards of solvent based products, solvent based demolding agents are a reliable choice; If environmental protection and safety are emphasized, and high requirements are placed on odor and toxicity, water-based release agents are more suitable; For high-temperature molding processes or solvent-free demand scenarios, solvent-free release agents are more suitable. Mastering the correct usage method of silicone release agent can effectively improve production efficiency and ensure the molding quality of silicone products.

Many times, after purchasing a silicone product, we often feel dissatisfied with it, whether it is color difference, hand feel, odor, etc. There are certain differences, because for the silicone product industry, there are many processes from production to oil spraying to printing for a product. Therefore, many silicone products will be baked at high temperatures after production. The products that need to be baked are generally common ones that we often come into contact with, such as silicone jewelry, silicone kitchenware, silicone household products, etc., which have high requirements for the product. However, some special industrial silicone adhesives, suitable for medical grade or food grade products, also need to be baked. In order to meet the various testing requirements required by customers and satisfy them, the baking personnel in the molding department are almost busy frying the pot, from baking to cleaning the products every day, even rushing to eat! So the difference between food grade silicone products and ordinary silicone products lies in their odor, hand feel, and aging performance. During the baking process, various problems are inevitable that can lead to product defects, such as discoloration, deformation, and even burnout. So when baking, it is still necessary to pay attention to some details. After being placed in the oven, if the temperature inside the oven is too high, the flowability of the raw materials of the product will be poor, which will cause deformation of the product. Secondly, the reason for whitening is also due to discoloration caused by high temperature. If the baking time is too long, discoloration and yellowing will also occur. In recent observations, there are also certain influences in the raw materials, such as the fact that the raw material belongs to high-temperature adhesive but the colored adhesive is not heat-resistant, which can also cause discoloration and whitening of the product. Secondly, during the baking process, the product closest to the high-temperature port is more likely to be found defective, and if the baking time is too long, it is easy to catch fire.

Silicone gasket miscellaneous parts are widely used in automotive, electronics, medical and other industries, and their size accuracy directly determines the sealing performance and assembly adaptability. To achieve effective size control, it is necessary to implement systematic management throughout the production process, focusing on four core links. 1. Material Selection and Pre-control The shrinkage rate of silicone material is the core factor affecting product size. It is recommended to select low-shrinkage silicone (shrinkage rate ≤0.8%) for production, and strictly control the batch consistency of materials to ensure that the shrinkage fluctuation between batches is within ±0.1%. For products with different hardness requirements, note that the shrinkage rate of soft silicone (30 Shore A) is 3%-4%, while that of hard silicone (60 Shore A) is only 1.2%-1.5%, and corresponding mold compensation adjustments should be made according to this difference. 2. Mold Design and Precision Control Mold accuracy is the foundation of size control. The cavity processing accuracy should be matched with the product requirements: ultra-precision products (tolerance ±0.01-0.03mm) require cavity accuracy of ±0.005mm, while conventional products (tolerance ±0.05-0.1mm) can use cavities with ±0.02mm accuracy. At the same time, the shrinkage compensation should be accurately calculated according to the material shrinkage rate and product structure, and the mold cavity size should be appropriately enlarged to offset the size reduction caused by silicone vulcanization shrinkage. In addition, the mold positioning mechanism should adopt double positioning such as conical pins to ensure that the positioning deviation is ≤0.05mm. 3. Process Parameter Optimization Stable molding process is the key to reducing size fluctuation. First, control the vulcanization parameters: adopt PID closed-loop temperature control to ensure that the mold temperature fluctuation is ±1℃, and the temperature difference between each area is within ±2℃; the injection pressure fluctuation should be ≤5%, and multi-stage injection can be used to avoid uneven filling caused by excessive speed deviation. Second, reasonably set the holding time and cooling time: the holding time is adjusted according to the product thickness, and the cooling time is controlled to ensure that the demolding temperature is ≤40℃, reducing post-shrinkage deformation. Finally, avoid demolding too early to prevent size rebound due to incomplete silicone shaping. 4. Detection and Post-processing Correction Establish a full-process detection system: conduct full-size inspection of the first piece of each shift and each mold, use visual inspection systems for online automatic detection during mass production, and sample inspection with coordinate measuring machines (accuracy ±0.01mm) every hour to monitor size fluctuation in real time. For products with slight size deviation, low-temperature shaping treatment (60℃×2h, applying 0.5MPa pressure) can be used to correct the size and improve the qualification rate. At the same time, establish a shrinkage rate database, and dynamically adjust mold compensation and process parameters according to the actual shrinkage rate of each batch of products. Through the above four-link control, the size tolerance of silicone gasket miscellaneous parts can be stably controlled within the required range, meeting the application needs of different industries from conventional industrial scenarios to high-end fields such as medical treatment and semiconductors.

There are various types of customized processing techniques for silicone products, and different types of silicone products require different processes to be made. Most products cannot avoid the silk screen printing process, which is not only applied in the silicone industry. In daily life, many product patterns and logos need to be printed using silk screen printing. Due to its many advantages, silk screen printing can be recognized in many industries. Its printing process uses two-component liquid silicone and curing agent color paste to mix and produce the required silk screen colors, and finally completes the silk screen printing process through a silk screen machine. In the silicone product industry, its purpose is to achieve the engraving of product appearance patterns with fonts, such as the commonly seen silicone gift logo. The screen printing process has many excellent characteristics compared to other processes. Firstly, it has good fluidity, strong adhesive viscosity and clear effect, high and low temperature printing stability, and good weather resistance and aging performance. The patterns printed by screen printing have a more three-dimensional and tactile feel, and the screen printing patterns also have excellent peel strength, wear resistance, and brightness; It also has waterproof, anti slip, breathable, high and low temperature resistance, and outstanding leveling properties.What are the details that silicone product manufacturers need to pay attention to during the screen printing process? The quality of silk screen printing is closely related to the quality of the pattern. Therefore, in some processes such as silicone buttons and silicone gift cups, the ink applied to the product is also crucial for the silk screen printing process. High quality ink can improve the quality of the pattern. However, some products may experience color fading after long-term use, mainly due to the following reasons:1. The quality of screen printing ink is relatively poor, which affects the surface of silicone products and leads to poor screen printing effect;2. After silk screen printing, the baking temperature of silicone products is too low or the baking time is short, resulting in poor wear resistance of the printed silicone product patterns. After several uses, the patterns begin to become blurry;3. The surface of silicone products is too dirty and not cleaned before screen printing, which hinders the adsorption between screen printing ink and silicone, causing characters to fall off with a slight force.