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

Food grade can directly touch food/human body, while industrial grade can only be used in factories/machinery and must not be mixed. Please refer to these simple explanations for more details: 1.In terms of safety: Food grade: After strict testing, it does not contain heavy metals or toxic additives. High temperature cooking and microwave heating will not release harmful substances, meeting safety standards such as FDA and GB 4806. Industrial grade: No safety requirements, may contain impurities or toxic additives, high temperature may emit odors/toxic gases, and there are health risks when touching food and skin. 2.In terms of usage: Food grade: silicone spatula, baking mold, lunch box sealing ring, baby pacifier, dental glue, medical catheter. Industrial grade: door and window sealant, automotive seals, electronic equipment waterproof adhesive, industrial molds (for making crafts/cement). 3.In terms of experience: Food grade: Basically tasteless, washed 1-2 times to clean, and does not deform or precipitate even after repeated cooking. Industrial grade: has a pungent odor (difficult to remove), is prone to softening and deformation at high temperatures, and may also emit oil. 4.How to choose: When buying products that can be used to touch food/babies, you must check the packaging label for "food contact use" and "FDA/LFGB/GB 4806"; The price is too cheap, there is no safety label, and it is said to be "for food use". It is highly likely to be an industrial grade counterfeit. Don't buy it.

Industrial grade silicone products are used. Silicone products are various products made from silicone as the main raw material through processes such as molding, extrusion, injection, etc. Due to its high temperature resistance, low temperature resistance, corrosion resistance, insulation, non-toxic and odorless properties, silicone products are widely used in industrial production, medical and health, consumer electronics, household daily use and other fields. Among them, industrial grade silicone products have become an indispensable key material in industrial production due to their stable performance and strong adaptability. 1. Core characteristics of industrial grade silicone products The core advantage of industrial grade silicone products lies in their excellent physical and chemical properties. Its temperature resistance range is wide, and conventional products can be used for a long time in an environment of -50 ℃ to 200 ℃. The special formula can even withstand high temperatures of 300 ℃, without brittle cracking at low temperatures or softening at high temperatures. For example, the car sealing strip is made of silicone material, which can resist the erosion of extreme weather on the body structure. In addition, silicone products have excellent aging resistance, UV, ozone and oxidation resistance, and can maintain elasticity even after 5-10 years of outdoor use, significantly extending the service life of equipment. In terms of chemical stability, silicone has a swelling rate of less than 5% for non-polar solvents (such as alkanes) and a volume change of less than 10% for polar solvents. Fluorosilicone has an expansion rate of less than 20% in fuel, making it an ideal sealing material for chemical pipelines and fuel systems. Its electrical insulation performance is also outstanding, with a volume resistivity exceeding 101? Ω· cm, low dielectric loss in high-frequency environments, widely used in electronic component packaging, high-voltage insulators and other fields. 2. Typical application scenarios of industrial grade silicone products In the field of sealing and buffering, silicone O-rings and shock absorbers are the "invisible guardians" of industrial equipment. For example, silicone seals in hydraulic systems can withstand high-pressure environments and prevent liquid leakage; The silicone shock absorber pad at the bottom of mechanical equipment can effectively absorb vibrations, reduce noise, and protect precision components. Electronic and electrical industry: Silicone has become the "protective clothing" for electronic components due to its insulation and high temperature resistance. The mobile phone soft rubber protective case and wireless earphone ear cap are made of silicone material, which balances anti slip and tactile feel; The silicone sealant on the circuit board can isolate moisture and dust, improving equipment stability. Medical and health field: Medical grade silicone products need to pass FDA and ISO 10993 biocompatibility certification, and are non-toxic and non irritating when in direct contact with the human body. Surgical catheters, respiratory masks, artificial organs, etc. all rely on the flexibility and sealing of silicone to ensure the safety and reliability of medical processes. Automotive industry: Silicone products play multiple roles in automotive manufacturing. The silicone sealing strip inside the engine compartment can withstand high-temperature fuel erosion; The silicone lens in the headlight component has high transmittance and resistance to yellowing; The electric vehicle battery pack uses silicone thermal pads to achieve efficient heat dissipation and electrical isolation. Industrial grade silicone products have become an indispensable basic material for modern industry due to their comprehensive performance of "elasticity+stability+safety". From seals in extreme environments to precision medical equipment, from electronic component protection to automotive safety systems, silicone products are constantly expanding their application boundaries through technological innovation. In the future, with the advancement of materials science, silicone products will develop towards higher performance and more environmentally friendly directions, providing more reliable solutions for industrial production.

Do silicone daily necessities have health concerns? From pacifiers in babies' hands, to essential scraper molds for baking enthusiasts, to foldable water bottles loved by young people, a soft and elastic material - silicone - is rapidly integrating into every aspect of our daily lives. It claims to be heat-resistant, easy to clean, portable and environmentally friendly, quickly replacing some traditional plastic, glass and metal products. However, as its popularity skyrockets, questions arise: are these brightly colored and uniquely tactile silicone products really safe and harmless as advertised, while bringing convenience? Is it an ideal companion for modern life, or is there a hidden risk that we have not yet noticed? Do silicone daily necessities have health concerns. Silicone, its chemical essence is silicon dioxide, it is not the plastic (polymer) we often refer to. Thanks to its unique molecular structure, silicone daily necessities have many commendable characteristics. The most outstanding thing is its excellent temperature resistance. High quality silica gel can usually withstand a temperature range of -40 ℃ to 230 ℃ or even higher, which makes it safe to heat in the microwave oven, and can easily cope with the high temperature disinfection and sterilization of dishwashers. Secondly, it has excellent flexibility and chemical stability, is not easily brittle, is inert to most substances, and does not easily react with food or produce odors. In addition, its soft surface is not easy to scratch the cookware, and its anti slip effect is excellent, which together establish its stable position in the kitchen. For ordinary consumers, it is essential to master some simple identification skills. One is "smell". High quality food grade silicone is almost odorless when it leaves the factory, and should not produce a pungent plastic or acidic odor even when exposed to heat. The second is "watching", observing whether the color is uniform and transparent. Products that are too bright or contain bright colors may need to be alert to whether unqualified colorants have been added. The third is "stretching". High quality silicone has good toughness and resilience, and it is not easy to turn white when stretched by hand, and can quickly recover to its original state, while inferior products may deform or even tear. Although these methods cannot replace professional testing, they can help us screen out most products with obvious problems in the first place. In addition to the safety of the material itself, the correct use and maintenance of silicone daily necessities also directly affect their lifespan and hygiene condition. Although silicone is resistant to high temperatures, it is still necessary to avoid prolonged exposure to air or flames. When cleaning, although most silicone products claim to be dishwasher washable, hand washing can more effectively maintain their texture, and timely cleaning after use can also prevent oil stains from seeping in. For silicone with adsorption properties (such as spatulas), attention should be paid to checking the surface for dark stains that are difficult to remove, which may be a signal that needs to be replaced. Proper maintenance not only extends the service life of products, but also represents a continuous responsibility for health. From this, it can be seen that silicone daily necessities themselves are a positive material advancement, and the key to their safety lies in the producer's adherence to standards and the consumer's discernment of quality. When we hold a silicone kitchenware, we choose not only a tool, but also a consideration for our quality of life. It injects convenience and warmth into the fast-paced modern life with its unique flexibility and toughness, but only through marketing rhetoric, recognizing its material nature and safety standards, can it truly become our trusted life assistant, rather than a hidden burden. Wise choices and correct use are essential to ensure that this' silicone revolution 'truly serves our health and convenience, and warms our daily lives with the light of technology.

In today's rapidly developing technology, the performance of electronic devices continues to improve, and the heat generated during their operation is also increasing day by day. In order to ensure stable operation of equipment and extend its service life, thermal conductive silicone, a key heat dissipation material, has gradually entered the public eye. This article will provide a detailed introduction to the function and usage of thermal conductive silicone, helping you to gain a deeper understanding of this important material.   The function of thermal conductive silicone 1. Efficient thermal conductivity: Thermal conductive silicone can fill the gap between electronic devices and heat sinks, increase the contact area, significantly reduce thermal resistance, and thus improve heat dissipation efficiency. 2. Insulation protection: Thermal conductive silicone has excellent electrical insulation properties, which can effectively prevent short circuits between electronic components and ensure the safe and stable operation of the circuit system. 3. Shock absorption and buffering: This material has a certain degree of flexibility and elasticity, which can play a role in shock absorption and buffering when the equipment is subjected to vibration or impact, protecting electronic components from mechanical damage. 4. Moisture proof, dust-proof, and corrosion-resistant: Thermal conductive silicone can form a protective film on the surface of electronic devices, preventing the intrusion of moisture, dust, and corrosive substances, and protecting electronic components from environmental damage.   Usage of Thermal Conductive Silicone 1. Surface cleaning: Before using thermal conductive silicone, the surfaces of the heat source and radiator must be cleaned to remove oil, dust, impurities, etc., to ensure that the thermal conductive silicone can fully contact the surface and improve the thermal conductivity. 2. Application or installation: Thermal conductive silicone grease (paste like): If it is thermal conductive silicone grease, use a tool (such as a scraper, toothpick, etc.) to take an appropriate amount of silicone grease and evenly apply it to the surface of the heat source. Pay attention to applying it thinly and evenly to avoid accumulation or bubbles. Generally speaking, a thickness of 0.1-0.5 millimeters is recommended for application. Thermal conductive silicone film: For thermal conductive silicone film, cut the silicone film into a suitable shape and size according to the size of the heating element and heat sink, then remove the protective film, accurately place the silicone film between the heat source and heat sink, gently press it to make it tightly adhere. -Thermal conductive sealing adhesive: If it is a thermal conductive sealing adhesive, pour the adhesive solution into the area that needs to be sealed, ensuring uniform filling and no gaps. During the sealing process, tools can be used as needed to assist in fully covering the heating element with the adhesive solution.

There are various types of customized processing techniques for silicone products, and different types of silicone products require different production processes. Most products cannot avoid the silk screen printing process, which is not only used in the silicone industry. In daily life, many product patterns and logos need to be printed using silk screen printing. Due to its numerous 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.   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 too short, which leads to poor wear resistance of the silicone product patterns produced by silk screen printing. 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.

Why do silicone products crack? Silicone products are widely used in medical, electronic, kitchenware, maternal and child care fields due to their excellent elasticity, temperature resistance, and chemical stability. However, in actual use or production processes, cracking of silicone products occurs from time to time, which not only affects product performance but may also pose safety hazards. We will deeply analyze the core causes of cracking in silicone products from four dimensions: raw material quality, production process, usage environment, and design structure, providing scientific references for industry practitioners and consumers.   1. Raw material quality: "congenital defects" of inferior rubber materials The performance of silicone products directly depends on the quality of raw materials. If recycled materials, doped silicon powder or low purity silica gel are used, it will result in insufficient tear strength of the product, and cracks will appear under slight external force. For example, some manufacturers add a large amount of silicon powder to the adhesive to reduce costs, making materials that originally did not meet tear strength standards more prone to brittleness. In addition, if bubbles or impurities are not fully eliminated during the mixing process of the rubber material, stress concentration points will also form inside the product, becoming the "fuse" for cracking. Key indicators: The tear strength of high-quality silicone should be ≥ 30kN/m, the tensile strength should be ≥ 8MPa, and it must pass food grade certifications such as FDA and LFGB. If the rubber material is stored for too long or not sealed, it may also cause performance degradation due to oxidation, further increasing the risk of cracking. 2. Production process: The subtle balance between temperature and time The production of silicone products involves multiple processes such as mixing, vulcanization, and demolding, and any deviation in any link may cause cracking: Uncontrolled vulcanization process: Excessive vulcanization temperature or time can cause excessive cross-linking of silicone molecular chains, resulting in brittle products; On the contrary, insufficient vulcanization will result in incomplete curing of the rubber material and easy tearing during demolding. For example, an experiment showed that when the vulcanization temperature increased from 180 ℃ to 200 ℃, the cracking rate of the product increased by 40%. Mold design defects: Unreasonable mold structure (such as rounded corners and uneven wall thickness) can cause obstruction of silicone flow, resulting in stress concentration at thin walls. In addition, rough or dirty mold surfaces can hinder demolding, and forcibly peeling can easily strain the product. Improper demolding operation: Excessive use of demoulding agent or rough handling techniques (such as prying with sharp tools) can directly scratch the surface of the silicone, forming micro cracks that gradually expand with prolonged use. Optimization direction: Adopt segmented vulcanization process, first low-temperature pre vulcanization and then high-temperature shaping; Plating hard chromium or spraying PTFE coating on the surface of the mold to reduce the friction coefficient; Use compressed air assistance or silicone special demolding tools during demolding. 3. Design structure: the "invisible killer" of stress distribution Structural optimization during the product design phase is key to preventing cracking: Uneven wall thickness: Stress concentration is prone to occur at the transition between thickness and thinness, and it is necessary to use R-angle design (corner radius ≥ 0.5mm) or gradual wall thickness for smooth transition. For example, a certain brand of silicone kitchenware gradually increased the wall thickness at the connection between the pot handle and the pot body from 2mm to 5mm, resulting in a 75% decrease in cracking complaint rate. Functional gap: The grooves and holes designed for installing screws or buckles will weaken the structural strength and need to be compensated by adding reinforcing ribs or local thickening. A certain medical grade silicone catheter adopts a wavy reinforcement structure at the joint, effectively dispersing the stress during insertion and removal. Dynamic deformation design: For products that require repeated bending (such as silicone data cables), the deformation process needs to be simulated through finite element analysis to optimize material distribution and cross-sectional shape. A certain experiment showed that changing the cross-section of the data line from circular to D-shaped increased its bending life from 10000 times to 50000 times.     With the evolution of silicone materials towards high strength and toughness (such as the application of fluorosilicone and phenyl silicone), cracking problems will be further reduced in the future. But no matter how advanced the technology is, following scientific principles and process specifications is always the core rule to ensure the quality of silicone products.

To improve the quality of silicone products from molding to surface treatment, the core lies in optimizing process parameters, controlling key links, and standardizing quality inspections. Below is a detailed breakdown:   1. Molding Process Optimization (Foundation of Quality) Raw Material Control: Select high-purity silicone rubber (e.g., vinyl silicone rubber with vinyl content 0.15%-0.3% for general products, or high-phenyl silicone rubber for extreme environments) and compatible curing agents (peroxide curing agents for general use, platinum curing agents for medical-grade products). Preprocess raw materials by drying at 60-80℃ for 2-4 hours to remove moisture, avoiding bubbles in finished products. Mold Preparation: Use precision-machined molds with surface roughness Ra ≤ 0.8μm to ensure product surface smoothness. Apply a high-temperature resistant release agent (silicone-based or fluorine-based) evenly before molding, preventing product adhesion and surface scratches. Regularly maintain molds to repair wear, deformation, or residue buildup. Molding Parameter Tuning: For compression molding, control temperature at 160-180℃, pressure at 10-30MPa, and curing time at 3-10 minutes (adjust based on product thickness: 1-2 minutes per mm). For injection molding, set barrel temperature at 120-150℃ (avoid overheating to prevent rubber degradation), injection pressure at 50-100MPa, and mold temperature at 150-170℃. Ensure uniform rubber flow to avoid defects like uneven thickness or missing corners. De-molding & Post-Curing: Demold gently using professional tools to prevent product deformation or damage. Conduct post-curing at 200-220℃ for 2-4 hours for critical products (e.g., medical or aerospace parts) to eliminate residual volatile substances (VOCs) and improve mechanical properties (tensile strength ≥ 5MPa, elongation at break ≥ 300%). 2. Post-Molding Secondary Processing (Defect Correction & Precision Enhancement) Trimming & Deburring: Use laser trimming (for precision parts with tolerance ±0.01mm) or ultrasonic trimming (for mass-produced products) to remove flash and burrs. Avoid manual trimming for complex structures to prevent dimensional deviations. Dimensional Inspection: Employ 3D scanners or coordinate measuring machines (CMM) to check key dimensions (e.g., seal ring inner diameter, product thickness) against design drawings. Reject products with deviations exceeding ±0.05mm (stricter for high-end fields like medical devices: ±0.02mm). Defect Repair: For minor bubbles or pinholes, use silicone repair paste matching the base material for filling and curing. For serious defects (e.g., cracks, incomplete molding), scrap the product to avoid affecting overall performance. 3. Surface Treatment (Functional Upgrade & Quality Improvement) Cleaning Pretreatment: Use ultrasonic cleaning with neutral detergent (pH 6-8) at 40-60℃ for 10-15 minutes to remove oil, dust, or residual release agent on the surface. Rinse with deionized water and dry at 80-100℃ to ensure surface cleanliness (surface tension ≥ 38 mN/m). Functional Surface Treatment: Plasma Treatment: Use oxygen or argon plasma to etch the surface, increasing roughness and adhesion. It is suitable for products needing bonding (e.g., silicone rubber bonded to plastic or metal) and can improve bonding strength by 30%-50%. Coating Treatment: Apply silicone oil (for lubricity) or wear-resistant coatings (e.g., PTFE coatings) to the surface. The coating thickness is controlled at 5-20μm to enhance wear resistance (wear volume ≤ 0.1mm³ after 10,000 friction cycles) or reduce friction coefficient (≤ 0.2). Electroplating (for Special Needs): Conduct electroless plating of nickel or copper on the surface for electronic products requiring conductivity. Ensure plating uniformity (thickness deviation ≤ ±1μm) and good adhesion (pass the 3M tape peeling test without shedding). Post-Treatment Inspection: Check surface finish (no scratches, uneven coating), functional performance (adhesion, lubricity, conductivity), and conduct aging tests (high temperature 150℃ for 1000 hours or ultraviolet irradiation for 500 hours) to verify surface durability. 4. Quality Control System (Full-Process Guarantee) Establish SOPs (Standard Operating Procedures) for each link, training operators to ensure process consistency. Conduct random inspections of semi-finished products (10% sampling rate for molding, 5% for surface treatment) and 100% inspection of finished products. Record raw material batches, process parameters, and inspection results for traceability, facilitating defect analysis and improvement.

Silicone rubber products can adapt to multiple high-end fields, with the core being their excellent characteristics such as high and low temperature resistance, physiological inertness, and electrical insulation. Typical applications in different fields also utilize these characteristics in a targeted manner, as follows: 1. High and low temperature resistance and weather resistance: Silicone rubber can usually maintain elasticity for a long time at -60 ℃ to 200 ℃, and some special silicone rubber such as phenyl silicone rubber can still work normally at extreme low temperatures of -73 ℃, and can even withstand short-term environments of 300 ℃ at high temperatures; At the same time, it has outstanding resistance to ozone and ultraviolet radiation, and is not easily cracked even after being used outdoors for more than 20 years. In the aerospace field, this characteristic makes it suitable for manufacturing spacecraft seals, high-temperature resistant cable insulation layers, etc., which can resist extreme temperature differences and cosmic ray erosion in space; In the automotive field, it can be used to make sealing rings and spark plug sleeves around the engine, suitable for high temperature environments during engine operation and harsh outdoor weather. 2. Physiological inertness and biocompatibility: Qualified silicone rubber is non-toxic and odorless, does not cause rejection reactions in human tissues, and does not cause coagulation, making it an ideal medical biocompatible material. This feature makes it widely used in the medical field, such as in the production of implantable products such as artificial heart valves, artificial blood vessels, and tympanic membrane repair patches. The thickness of the tympanic membrane repair patch is only 0.1mm, and after microporous treatment, it not only supports tympanic membrane repair but also does not affect sound wave transmission; It can also be used for medical consumables such as syringe pistons, catheters, burn dressings, etc., ensuring the safety of clinical use. 3. Excellent electrical insulation performance: Silicone rubber has excellent dielectric properties, with dielectric strength almost unaffected by temperature in the range of 20-200 ℃, and can resist arc erosion. Even in extreme environments such as high temperatures, its insulation performance far exceeds that of ordinary organic rubber. This feature makes it indispensable in the field of electronics and electrical engineering, such as for making conductive buttons for mobile phones, silicone buttons for remote controls, high-voltage cable accessories in power equipment, insulation seals for electronic instruments, etc., which can ensure the stable operation of electronic equipment and power systems. 4. Good processing and formability: Silicone rubber can be made into products of different shapes through various processes such as molding, extrusion, injection, etc. It can produce complex precision components and large-area sealing materials. For example, in the daily consumption field, it can be made into silicone protective cases for mobile phones and silicone kitchenware for kitchens; In the industrial field, it can be processed into shock-absorbing pads for mechanical equipment, pipeline sealing strips, etc., to meet the diverse form requirements of different scenarios.

Firstly, we know that desiccants need to play a role in moisture and mold prevention, so the material must be able to achieve high adsorption strength, have certain advantages in acid-base reactions, slow aging rate, insolubility, and strong chemical stability. Only then can it be stored for a long time. Silicone material is a highly active adsorbent material that cannot tolerate any substances and has strong adsorption capacity. It mainly absorbs water vapor through adsorption, and silicone material has strong stability, and long-term storage will not cause any aging or depletion, so its effectiveness and lifespan as a desiccant are completely stable. During the service life of silica gel desiccant, experimental methods can be used. If stored in a dry and liquid free environment for a long time, it will have a certain moisture-proof and mildew proof effect. If used in environments with high humidity and severe ozone, the service life will be reduced. In the case of water seepage, it takes about a year, but without water seepage, it can be used for a long time. Its lifespan is entirely determined by the environment, but it can be used for a long time after normal storage. The use of desiccants is very extensive in the industry, and this auxiliary material has also made desiccant materials a production conversion category in the manufacturing industry. Desiccant materials can also be divided into many types. At present, there are mineral desiccants, fiber desiccants, quicklime materials, montmorillonite desiccants, activated alumina and silica gel desiccants, etc. Nowadays, silicone desiccants are commonly used as static items, and no one will move them casually, so they can still achieve good results in moisture and mold prevention!

Silicone products can be dyed, and there are many silicone products on the market, such as silicone face brushes, silicone phone cases, silicone pots and bowls, silicone toys, etc. Silicone kitchenware is also widely used in our daily necessities. Currently, manufacturers also customize various models and colors of kitchenware according to consumer needs. Of course, silicone as a kitchenware does not affect physical health. Food grade silicone is insoluble in water and any solvents, and it is non-toxic and odorless. It is a highly active green product. Silicone is a highly active adsorbent material with viscosity, hardness, tensile strength, and tear strength. But there is a misconception that many people think silicone is silicone rubber, when in fact it is not. Silicone rubber is a synthetic rubber. Silicone rubber is insoluble in non-polar solvents related to silicone, such as common water-soluble pigments including alkaline, acidic, and direct dyes. It can only use oil soluble fluorescent dyes and solvent metal complex dyes.   Silicone rubber refers to the alternating composition of silicon and oxygen atoms. Ordinary silicone rubber is composed of methyl and a small amount of ethylene based silicon oxygen chain links. Silicone rubber has good high and low temperature resistance, temperature resistance, and oil resistance. Silicone material has become a necessary item in our daily life. Many users believe that food grade silicone used in the kitchen will cause unhealthy factors to the human body. However, we believe that after understanding the dyeing principle of silicone, everyone can purchase it with confidence. There are also many types and colors of silicone available on the market. Choosing the right silicone material is our own responsibility, and we will do our best to meet the needs of users. We also support customization according to pictures.