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How to check the quality of silicone products? Due to their unique physical and chemical properties, silicone products are widely used in various fields such as medical, maternal and child care, kitchen, electronics, and industry. However, the quality of silicone products in the market varies greatly, and how to scientifically check their quality has become a focus of consumer attention. This article will systematically analyze the quality inspection methods of silicone products from four dimensions: appearance, physical properties, chemical safety, and adaptability to usage scenarios, combined with industry testing standards and daily practical skills. 1. Appearance inspection: intuitive judgment of basic qualityAppearance is the first threshold for the quality of silicone products. The surface of high-quality silicone products should be smooth and flat, without defects such as bubbles, cracks, missing glue, impurities, etc. For example, food grade silicone tableware needs to be visually inspected for uniform color and clear and firm printing patterns to avoid health risks caused by pigment migration.In the medical field, the appearance inspection of silicone sealing rings is more stringent. It is necessary to use a magnifying glass or microscope to inspect the surface for burrs and burrs, as these small defects may affect the sealing performance and cause liquid or gas leakage. In addition, the dimensional accuracy of silicone products also needs to be measured using tools such as calipers and micrometers to ensure that the error with the design requirements is within the allowable range.2. Physical performance testing: quantitative evaluation of core indicatorsThe physical properties of silicone directly determine its applicable scenarios and service life.Hardness testing: Measure the hardness value (Shore A) of silicone gel using a Shore hardness tester, with different hardness ranges corresponding to different applications. For example, kitchen silicone shovels need to be soft and heat-resistant (with a hardness of about 30-40A), while sealing rings need to have a higher hardness (50-70A) to ensure sealing.Tensile and tear strength: The tensile strength of high-quality silicone should be ≥ 8MPa, and the tear strength should be ≥ 25kN/m. The tear resistance can be tested by stretching the sample to twice its original length, observing whether it quickly rebounds without deformation, or simulating the shear force in actual use.Temperature resistance: The temperature range of silicone is usually -40 ℃ to 230 ℃. You can observe its flexibility by boiling it in boiling water for 30 minutes or freezing it for 24 hours. High quality silicone should be kept without deformation or brittleness.Wear resistance: For high-frequency usage scenarios (such as silicone phone cases), friction testing can be used to simulate daily wear and observe whether there are scratches or discoloration on the surface. 3. Chemical safety testing: strict control of health risksThe chemical safety of silicone products is of utmost importance in quality inspection, especially for food grade and medical grade products.Hazardous substance detection: Professional institutions need to be used to detect whether silicone contains harmful substances such as heavy metals (such as lead and cadmium), plasticizers (such as phthalates), bisphenol A (BPA), etc. For example, the VOC (volatile organic compound) content of food grade silicone should be less than 0.5% and certified by international organizations such as FDA and LFGB.Migration substance test: Soak silicone products in a specific solvent (such as simulated gastric acid solution) to detect the precipitation of harmful substances. This test is particularly important for products that come into direct contact with food, such as baby pacifiers and tableware.Odor and combustion test: High quality silicone has only a slight raw material odor and no pungent chemical odor. When burning, white smoke should be emitted, and the residue is white powder; If combustion produces black smoke or irritating odors, it may contain inferior additives. 4. Scene adaptation detection: precise matching of functional requirementsThe quality of silicone products needs to be comprehensively evaluated based on specific usage scenarios.Sealing performance: For products such as sealing rings and bottle caps, their sealing effect can be tested by water or air pressure testing. For example, install the silicone seal ring on the container and apply pressure to observe for any leakage.Anti slip performance: For silicone foot mats, anti slip pads and other products, their anti slip coefficient can be measured by sliding tests on different material surfaces (such as glass, wood).Biocompatibility: Medical grade silicone gel needs to undergo biocompatibility tests such as cell culture and skin irritation testing to ensure that it is non-toxic and harmless when in contact with the human body.Aging resistance: Simulate long-term outdoor use environment through ultraviolet aging test to observe whether silicone products change color, become brittle or have decreased performance. The quality inspection of silicone products needs to be comprehensively evaluated from four dimensions: appearance, physical properties, chemical safety, and suitability for use scenarios.

What are the performance indicators of silicone kitchenware? Have we ever been confused about the reliability of this flexible material when silicone kitchenware silently replaces stubborn yellowed wooden shovels and fragile plastic spoons in our homes? How does it face a scorching hot oil pot unscathed? Can oil stains be easily removed? What are the safety and durability of use? High temperature limit performance: a calm response to kitchen heatThe high temperature challenge is the "lifeline" for testing kitchen utensils. Professional kitchen experiment data shows that high-quality food grade silicone kitchenware can easily withstand extreme temperature differences of -40 ℃ to 230 ℃. In the specific experiment, the silicone spatula was stirred continuously in hot oil at 230 ℃ for 15 minutes, and its shape remained intact; The other group of samples was frozen at -20 ℃ and immediately placed in a 200 ℃ environment, and the material did not undergo any fracture deformation. In contrast, conventional plastic kitchen utensils soften or even decompose significantly above 100 ℃, while wooden kitchen utensils will slowly carbonize and produce odors under repeated dry burning contact.This excellent high temperature resistance is endowed by the Si-O bond of silicone molecules, which has a binding energy of up to 444 kJ/mol, far exceeding the carbon carbon bond in ordinary plastics (348 kJ/mol), allowing silicone molecules to maintain strong structural stability even in extreme thermal environments. As representatives of high safety standards, the FDA and LFGB certifications in the United States and the European Union also clearly state that silicone can be used continuously at temperatures above 200 ℃ under manufacturing conditions that comply with the standards, and harmless migration occurs. Cleanliness advantage: Surface characteristics where stains cannot settleThe anti fouling ability of silicone gel is also impressive. Taking the experiment as an example, the cleaning convenience of commonly used silicone scrapers was tested after dipping them in coffee, soy sauce, and chili oil. The results showed that in the vast majority of cases, only rinsing with water was needed to restore their original appearance without the need for cleaning agents. Compared with wooden or bamboo kitchen utensils that are prone to staining and staining in daily life, silicone has a smooth and dense surface, eliminating the hidden dangers of microbial growth in crevices. Fearless of Time: The Endurance Legend of Silicone KitchenwareHigh quality silicone kitchenware exhibits strong tear resistance and wear resistance for daily use, with an expected lifespan of typically 8-10 years. In the specific experiment, after simulating the daily action of flipping food and continuously using weights to apply pressure and scrape, the surface of the silicone tool only showed tiny traces of use. In contrast, plastic products will gradually become brittle, crack, and release micro chips after years of use; Wood and bamboo materials are prone to cracking, deformation, and even mold growth during repeated wetting and drying, with an average service life of only about 2-3 years. Health cornerstone: safety and purity of food grade silicone gelThe safety of food grade silicone is closely related to its high purity. As the gold standard for safety, platinum silicone (usually distinguished by its white or semi transparent appearance) is made from high-purity raw materials that have been certified to be free of any harmful plasticizers. Consumers should clearly identify authoritative safety labels such as FDA and LFGB, which are important defense lines to avoid health risks caused by unqualified silicone products.

How to balance quality and adaptability in the customization of silicone products? In the fields of industrial manufacturing and daily necessities, silicone has become a popular material due to its stable characteristics. Standardized products are difficult to meet diverse scenarios, and customized services are becoming increasingly popular. From structure, size to material and appearance, customization allows silicone parts to fit the equipment and the scene. But many people encounter problems such as size deviation, poor hand feel, and insufficient durability in customization. Customizing silicone products requires clear processes, rigorous material selection, and fine craftsmanship to transform ideas into stable and reliable finished products. The starting point of customization is requirement sorting. Firstly, clarify the usage scenarios and core requirements. Industrial seals focus on sealing and temperature resistance, while food grade safety is prioritized for mother, baby, and catering products. Electronic accessories emphasize anti slip, seismic resistance, and appearance. Determine details such as size, hardness, color, texture, etc., provide drawings or samples, communicate feasibility with technical personnel, and avoid later adjustments. Adequate communication can reduce rework and make the direction clearer.The selection of materials determines the basic quality of the product. Silicone is divided into industrial grade, food grade, and medical grade, and different grades are suitable for different scenarios. Food grade silicone is non-toxic and odorless, suitable for contact with tableware and maternal and child products; Good medical grade biocompatibility, used for precision instruments. High temperature resistance, tear resistance, aging resistance and other properties need to be matched according to the environment. High quality raw materials have uniform color and few impurities, and are not easily deformed or yellowed after long-term use, ensuring safety and longevity from the source. Mold and process are the key to molding. Mold accuracy directly affects size and appearance. Reasonable design of parting lines and exhaust structures can reduce burrs and bubbles. Steel molds are suitable for large-scale production, with long service life and good stability; Small batches can use aluminum alloy molds to control costs. Strictly control the temperature, pressure, and time during molding to ensure that the material is fully cured, improving consistency and hand feel. Complex structures can be processed using liquid silicone technology to restore details.Quality control runs through the entire process. Raw material storage inspection to ensure that the grade and performance meet the standards; Sampling inspection of size, appearance, and function during production, and timely adjustment of parameters; The finished product undergoes tests such as airtightness, tensile strength, and temperature resistance, and is delivered only after meeting the standards. Complete testing can reduce the defect rate and ensure the stability and reliability of every product.Mature customized services also include after-sales support. Batch production after sample confirmation, providing packaging and logistics solutions. Encounter problems during use, respond promptly and provide optimization suggestions. Long term cooperation can establish records, facilitate subsequent repurchases and changes, and make cooperation more worry free. Customization of silicone products is not a simple process, but a systematic engineering from demand to implementation. By solidly focusing on details, taking into account materials, craftsmanship, and control, we can create products with precise dimensions, stable performance, and exquisite appearance. Whether it's industrial accessories, daily home furnishings, or electronic accessories, good customization can enhance adaptability and user experience, providing long-term stable support for products and equipment

How to balance quality and adaptability in the customization of silicone products? In the fields of industrial manufacturing and daily necessities, silicone has become a popular material due to its stable characteristics. Standardized products are difficult to meet diverse scenarios, and customized services are becoming increasingly popular. From structure, size to material and appearance, customization allows silicone parts to fit the equipment and the scene. But many people encounter problems such as size deviation, poor hand feel, and insufficient durability in customization. Customizing silicone products requires clear processes, rigorous material selection, and fine craftsmanship to transform ideas into stable and reliable finished products. The starting point of customization is requirement sorting. Firstly, clarify the usage scenarios and core requirements. Industrial seals focus on sealing and temperature resistance, while food grade safety is prioritized for mother, baby, and catering products. Electronic accessories emphasize anti slip, seismic resistance, and appearance. Determine details such as size, hardness, color, texture, etc., provide drawings or samples, communicate feasibility with technical personnel, and avoid later adjustments. Adequate communication can reduce rework and make the direction clearer.The selection of materials determines the basic quality of the product. Silicone is divided into industrial grade, food grade, and medical grade, and different grades are suitable for different scenarios. Food grade silicone is non-toxic and odorless, suitable for contact with tableware and maternal and child products; Good medical grade biocompatibility, used for precision instruments. High temperature resistance, tear resistance, aging resistance and other properties need to be matched according to the environment. High quality raw materials have uniform color and few impurities, and are not easily deformed or yellowed after long-term use, ensuring safety and longevity from the source. Mold and process are the key to molding. Mold accuracy directly affects size and appearance. Reasonable design of parting lines and exhaust structures can reduce burrs and bubbles. Steel molds are suitable for large-scale production, with long service life and good stability; Small batches can use aluminum alloy molds to control costs. Strictly control the temperature, pressure, and time during molding to ensure that the material is fully cured, improving consistency and hand feel. Complex structures can be processed using liquid silicone technology to restore details.Quality control runs through the entire process. Raw material storage inspection to ensure that the grade and performance meet the standards; Sampling inspection of size, appearance, and function during production, and timely adjustment of parameters; The finished product undergoes tests such as airtightness, tensile strength, and temperature resistance, and is delivered only after meeting the standards. Complete testing can reduce the defect rate and ensure the stability and reliability of every product.Mature customized services also include after-sales support. Batch production after sample confirmation, providing packaging and logistics solutions. Encounter problems during use, respond promptly and provide optimization suggestions. Long term cooperation can establish records, facilitate subsequent repurchases and changes, and make cooperation more worry free. Customization of silicone products is not a simple process, but a systematic engineering from demand to implementation. By solidly focusing on details, taking into account materials, craftsmanship, and control, we can create products with precise dimensions, stable performance, and exquisite appearance. Whether it's industrial accessories, daily home furnishings, or electronic accessories, good customization can enhance adaptability and user experience, providing long-term stable support for products and equipment.

Silicone jewelry has now become the mainstream of craft jewelry, and many types of decorations have become gifts, etc., all made of customized silicone materials. Most of the reasons are inseparable from its craftsmanship and appearance treatment, such as sun stripes, multi-color three-dimensional, oil spray textures, silk screen patterns, etc. Among silicone gifts, bracelet accessories are the main type, and silk screen patterns have become mainstream nowadays, but silk screen patterns also have their drawbacks. How to solve problems such as uneven ink and oil droplets in products? Screen printing belongs to oil-based processes, and silicone rubber products cannot do without screen printing technology. In order to enhance aesthetics, ink is used for pattern printing, and the quality of ink is naturally crucial for the adjustment of transfer printing machines and the processing methods of products. Many friends may have been wearing silicone bracelets and other accessories for a period of time, but their words have fallen off. So what is the reason for this problem?The main reasons for missing words in printed silicone wristbands are as follows:1.Ink problem: The ink purchased by the silicone bracelet manufacturer or the ink prepared by oneself is not well prepared, and the diluent is very important. For example, when preparing, its matching degree may be more or less incorrect, which can cause incompatible reactions between ink and silicone gel, such as unclear screen printing, ink loss after a period of use, cracks in screen printing patterns, uneven ink, and so on! 2.Technical issues. The silk screen printing process of silicone jewelry is very important, such as how to place and position it, and how to dry the mesh. Especially during screen printing, is there any residue on the printed part of the product. Silicone rubber products that are too dirty can cause the adsorption of screen printing ink, so many silicone manufacturers usually clean the products first.3.Baking issues are the main reason. Many products are baked at high temperatures after screen printing, but they still come off when touched. The oven problems of many products are closely related. Different products have different baking temperatures, so it is very important to properly control product issues! Secondly, if the speed of the oven tunnel is too fast, it may cause the air to dry out, so the ink cannot drop until the main screen pattern is completely cured.4.After using it for a while, it fell off, but the initial state was still good. The reason is that in environmental use, ink aging, peel strength, wear resistance, and gloss effect cannot be achieved. Ink is the main issue, so printing with high-quality ink can maintain the quality of silicone jewelry.

In modern industrial products, many basic things cannot be separated from the processing of molds. Many materials we see in daily life, such as hardware, plastic, silicone, and other punching materials, are made using different molds. Therefore, compared to many industry professionals, the importance of molds should be known. Similarly, in the silicone industry, it is no exception. Without molds and auxiliary tools, it is impossible to complete many of our products. In the silicone product industry, molds are the key to the entire product, and all products must be produced using molds to meet the requirements. However, silicone is different from plastic and hardware grinding tools in that it can be molded for sample making, which makes many people puzzled whether to use 3D printing or directly use production molds for sampling. Today, we will explain the different processes and methods of molds. Due to the fact that silicone product materials belong to soft colloids and are not processed using hard adhesives, 3D printing is a drawback. However, with the maturity of 3D printing, the use of soft adhesives is gradually becoming more mature. However, the material and workmanship of 3D printed soft adhesives still cannot achieve the desired effect and texture of the finished product. While the structure alone is not a problem, the effect still needs to be evaluated through the production of molds and the processing of finished products. The bulk mold and sample mold are the processes we need to go through. Many customers' silicone accessories cannot meet the requirements in terms of assembly and appearance, and they dare not rashly open production bulk molds. Otherwise, they are worried that the structure of the mold will not be correct after opening, and the appearance effect will not meet the requirements, resulting in poor quality of the silicone product and difficult project progress. Therefore, in the early stage of production, in order to meet the customer's appearance and structure requirements and achieve a similar fitting effect, we need to open a small mold and create a sample mold for comparison. After achieving the desired effect, we can proceed with the production of bulk molds. The difference between the production mold and the large goods mold is that the large goods mold can produce many points in a the first mock examination, which can be more efficient in production and processing in mass production. The sample mold is used for the qualification requirements of experimental samples in the early stage. Their difference is that one is only used for sample making experiments, and the other is used for mass production of large goods. So many friends do not understand why it is not possible to directly use sample molds for mold production. Today, I will explain to you that the production efficiency of silicone product processing manufacturers determines the unit price and profit of products. For example, a mold with one output can only produce 100 pieces per day, while a mold with 10 output can produce 1000 pieces per day. In the case of a large difference in production capacity, the processing cost of products will invisibly increase. Therefore, why silicone manufacturers are unwilling to use sample molds for mass production is also due to the increase in cost caused by different molds.

Every industry uses small parts, so many things happen around us. Silicone accessories are indispensable for sealing and protective products in all industries. The function and impact of silicone accessories can play a significant role in many product combinations, and the combination of softness and hardness can completely affect any functional issues. So improper selection of hardness for silicone accessories can lead to quality issues. What are the effects of different software and hardware on functionality? Spare parts are mainly used for assembly, sealing, shock absorption, protection, and intermittent maintenance. However, the softness and hardness of silicone have disadvantages in different functions. In terms of sealing function, if the hardness of silicone seals is high and the folding adhesive force is low, it is likely to cause leakage in the remaining parts. After long-term stress aging, the service life of silicone seals will be affected to some extent, resulting in fracture and cracking. Low hardness can buffer functionality. In terms of waterproof function, reducing the hardness as much as possible can more effectively achieve the waterproof effect. However, the material and thickness of the product must be appropriate in order to achieve good tensile rebound. In terms of cushioning and shock absorption, silicone products need to achieve medium to high hardness values as much as possible. Due to the influence of stress, a low hardness value of the product is likely to result in insufficient shock absorption effect and inability to achieve functionality. Secondly, the assembled low hardness silicone accessories are likely to achieve active cushioning and shock absorption, leading to looseness and detachment. After increasing the hardness value, not only can the firmness be improved, but also due to the high hardness value, it can play a buffering role. Assembly, many silicone accessory manufacturers know that sealing accessories are assembled using different materials, and the integrity of the assembly is also affected by hardness, leading to functional issues with the product. Materials with high hardness are difficult to assemble, and the higher the hardness, the smaller the tensile rebound. Therefore, high hardness accessories should be assembled with as little stretching as possible, while low hardness accessories are better. However, attention should also be paid to the issue of excessive stretching.

The application scenarios of silicone are becoming increasingly diverse, with low-temperature silicone and high-temperature silicone being suitable for different temperature environments and production needs due to their unique performance advantages. Although both belong to the silicone category, there are significant differences in chemical formulations, process requirements, performance, and application scenarios. This article analyzes the differences between the two from key dimensions, providing accurate references for industry procurement and application.   The key difference between low-temperature silicone and high-temperature silicone 1. Different temperature resistance range and formula. The main advantage of low-temperature silicone is its adaptability to extreme low-temperature environments. The structure is optimized by introducing methyl phenyl siloxane chains into the molecular chain. The typical low-temperature resistance range is -40 ℃ to 120 ℃. Its core advantage is that it will not become brittle at low temperatures and has a low compression permanent deformation rate. High temperature silicone is mainly made of vinyl silicone rubber, with heat-resistant agents added to enhance stability. The regular model can withstand temperatures of 200 ℃ to 300 ℃ for a long time, while the special model can withstand high temperatures of 400 ℃ for a short period of time, while also possessing basic cold resistance of -65 ℃. 2. Sulfurization process and production characteristics: Low temperature silicone gel adopts low-temperature rapid vulcanization technology, which can be formed at 120 ℃ without adding vulcanizing agents or secondary vulcanization. The production process does not produce waste gas, the product has no odor, and the dimensional stability is better. High temperature silicone is mostly a two-component heating vulcanization process that requires vulcanization molding at temperatures above 180 ℃. Some products require secondary vulcanization to improve performance, and the production cycle is relatively long. However, the molded products have better tear resistance and aging resistance, making them suitable for large-scale standardized production. Only by accurately distinguishing the key differences between low-temperature silicone and high-temperature silicone can we achieve precise matching between material properties and application requirements, ensuring product reliability and optimizing production costs. With the development of formulation technology, the performance boundaries between the two are gradually expanding, but the core positioning based on temperature adaptability is still the key basis for selection. Therefore, it is necessary to know the differences between the two.

How to achieve precise adaptation through customized silicone products? Silicone products are widely used in industrial manufacturing and daily life due to their elasticity, weather resistance, and plasticity. However, in the face of complex and ever-changing application scenarios, generic products often struggle to meet special needs. Whether it's precision components for medical devices, waterproof buttons for electronic devices, or high-temperature resistant seals for the automotive industry, customized silicone products have become the core of solving problems. How to use scientific design, material selection, and process control to make silicone products perfectly fit equipment functions and usage environments.   Design phase: Conversion from requirements to solutions The customization of silicone products begins with precise capture of demand. Designers need to comprehensively consider factors such as product usage, mechanical properties, and environmental adaptability. For example, medical grade silicone needs to meet biocompatibility standards, while outdoor equipment components require enhanced UV resistance. When designing, it is necessary to predict the shrinkage rate of silicone in vulcanization molding (usually 1.5% -3%), and reserve a reasonable demolding slope (generally ≥ 1 °) to avoid difficulties in demolding due to complex structure. For parts with inverted or internal angles, it is also necessary to design a slider or inclined top mechanism to ensure smooth opening and closing of the mold.   Material selection: balance between performance and cost The type of silicone material directly affects the performance of the finished product. Liquid silica gel (LSR) is commonly used in precision medical devices due to its high resilience and stability; Solid silicone gel (RTV) is suitable for conventional sealing components in the consumer electronics field due to its lower cost. If the product needs to withstand high temperatures (such as car intake pipes), heat-resistant silicone with a temperature resistance of up to 200 ℃ can be selected; If long-term contact with the human body is required (such as baby products), non-toxic and odorless medical grade materials should be used. In addition, TPE particle modification technology can further enhance the elasticity and wear resistance of silicone. For example, a medical device company improved the tensile strength of silicone handles to 12MPa through TPE modification, far exceeding the industry average.   Process control: Details determine success or failure The molding process of silicone products needs to match the product characteristics. Injection molding is suitable for parts with complex structures and large batches, and can achieve a dimensional accuracy of ± 0.01mm through high-temperature vulcanization; Compression molding is more suitable for small-scale production, but strict control of mold temperature (usually 140-180 ℃) and pressure (50-100MPa) is required. The surface treatment process is equally critical, such as achieving a strong bond between silicone and plastic through secondary encapsulation molding, or adding markings through laser engraving. Taking the silicone button of a certain night vision device as an example, the use of silicone wrapped plastic integrated molding technology not only prevents dust and water, but also extends the product's service life.   Quality Verification: From Laboratory to Practical Application Customized silicone products require multidimensional testing. Tensile testing and aging testing (such as performance retention rate ≥ 90% after accelerated aging for 1000 hours) can verify material stability; Dimensional inspection requires the use of a coordinate measuring instrument to ensure that the tolerance is controlled within ± 0.02mm. In practical applications, a surgical instrument manufacturer has customized curved silicone handles to reduce doctors' fatigue by 30% during operation and completely solve the problem of traditional silicone cracking. This type of case confirms the direct value of customized solutions in enhancing functionality.   Delivery and Service: A Continuous Optimization Loop Customization of silicone products is not a one-time transaction, but a complete service chain from design to delivery. High quality suppliers will optimize formulas or processes based on customer feedback, such as adjusting the silicone formula to improve the sealing performance by 50% for the leakage problem of a certain car cable joint. Meanwhile, the ability to respond quickly is crucial, as some companies can complete mold opening and sample production within 7 days, shortening the research and development cycle.   The customization of silicone products is essentially a deep match between demand and technology. Through precise design, scientific material selection, and technological innovation, not only can functional problems in complex scenarios be solved, but products can also be endowed with higher reliability and competitiveness. When every customization process is centered around actual needs, silicone products can truly become the "invisible pillar" in industry and life.

How to check the quality of silicone products? Due to their unique physical and chemical properties, silicone products are widely used in various fields such as medical, maternal and child care, kitchen, electronics, and industry. However, the quality of silicone products in the market varies greatly, and how to scientifically check their quality has become a focus of consumer attention. This article will systematically analyze the quality inspection methods of silicone products from four dimensions: appearance, physical properties, chemical safety, and adaptability to usage scenarios, combined with industry testing standards and daily practical skills.   Appearance inspection: intuitive judgment of basic quality Appearance is the first threshold for the quality of silicone products. The surface of high-quality silicone products should be smooth and flat, without defects such as bubbles, cracks, missing glue, impurities, etc. For example, food grade silicone tableware needs to be visually inspected for uniform color and clear and firm printing patterns to avoid health risks caused by pigment migration. In the medical field, the appearance inspection of silicone sealing rings is more stringent. It is necessary to use a magnifying glass or microscope to inspect the surface for burrs and burrs, as these small defects may affect the sealing performance and cause liquid or gas leakage. In addition, the dimensional accuracy of silicone products also needs to be measured using tools such as calipers and micrometers to ensure that the error with the design requirements is within the allowable range.   Physical performance testing: quantitative evaluation of core indicators The physical properties of silicone directly determine its applicable scenarios and service life. Hardness testing: Measure the hardness value (Shore A) of silicone gel using a Shore hardness tester, with different hardness ranges corresponding to different applications. For example, kitchen silicone shovels need to be soft and heat-resistant (with a hardness of about 30-40A), while sealing rings need to have a higher hardness (50-70A) to ensure sealing. Tensile and tear strength: The tensile strength of high-quality silicone should be ≥ 8MPa, and the tear strength should be ≥ 25kN/m. The tear resistance can be tested by stretching the sample to twice its original length, observing whether it quickly rebounds without deformation, or simulating the shear force in actual use. Temperature resistance: The temperature range of silicone is usually -40 ℃ to 230 ℃. You can observe its flexibility by boiling it in boiling water for 30 minutes or freezing it for 24 hours. High quality silicone should be kept without deformation or brittleness. Wear resistance: For high-frequency usage scenarios (such as silicone phone cases), friction testing can be used to simulate daily wear and observe whether there are scratches or discoloration on the surface.   Chemical safety testing: strict control of health risks The chemical safety of silicone products is of utmost importance in quality inspection, especially for food grade and medical grade products. Hazardous substance detection: Professional institutions need to be used to detect whether silicone contains harmful substances such as heavy metals (such as lead and cadmium), plasticizers (such as phthalates), bisphenol A (BPA), etc. For example, the VOC (volatile organic compound) content of food grade silicone should be less than 0.5% and certified by international organizations such as FDA and LFGB. Migration substance test: Soak silicone products in a specific solvent (such as simulated gastric acid solution) to detect the precipitation of harmful substances. This test is particularly important for products that come into direct contact with food, such as baby pacifiers and tableware. Odor and combustion test: High quality silicone has only a slight raw material odor and no pungent chemical odor. When burning, white smoke should be emitted, and the residue is white powder; If combustion produces black smoke or irritating odors, it may contain inferior additives.   Application scenario adaptation detection: precise matching of functional requirements The quality of silicone products needs to be comprehensively evaluated based on specific usage scenarios. Sealing performance: For products such as sealing rings and bottle caps, their sealing effect can be tested by water or air pressure testing. For example, install the silicone seal ring on the container and apply pressure to observe for any leakage. Anti slip performance: For silicone foot mats, anti slip pads and other products, their anti slip coefficient can be measured by sliding tests on different material surfaces (such as glass, wood). Biocompatibility: Medical grade silicone gel needs to undergo biocompatibility tests such as cell culture and skin irritation testing to ensure that it is non-toxic and harmless when in contact with the human body. Aging resistance: Simulate long-term outdoor use environment through ultraviolet aging test to observe whether silicone products change color, become brittle or have decreased performance.