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

Natural rubber: Under general wear conditions, natural rubber has good wear resistance. Especially in low-temperature environments below 15 degrees, its wear resistance is superior to that of styrene butadiene rubber. Styrene butadiene rubber: Under high temperature conditions, styrene butadiene rubber exhibits excellent wear resistance. At the same time, when the temperature is above 15 degrees, its wear resistance is also better than natural rubber. In addition, the benzene ring in styrene butadiene rubber contains conjugated double bond groups, which can absorb and distribute external energy, protect the macromolecular chain from damage, and thus improve wear resistance. Butadiene rubber: Under harsh conditions such as high speeds, polybutadiene rubber has the best wear resistance. The wear resistance of its vulcanized rubber increases with the increase of the content of cis chain links (1,4 structure). Polyurethane rubber: containing conjugated benzene rings, its wear resistance ranks among the top in various rubbers, more than 4 times higher than natural rubber and styrene butadiene rubber. However, it should be noted that its wear resistance will sharply decrease at high temperatures. Other rubbers, such as chloroprene rubber and nitrile rubber, also have good wear resistance and can be selected according to specific application scenarios.

1. In terms of molds Check the accuracy and fit clearance of the mold The excessive clearance between the mold cavity and the core is one of the important reasons for the occurrence of burrs. If the gap exceeds the minimum flash edge gap of silicone rubber during the molding process (usually around 0.01-0.02mm, depending on the performance and product size of the silicone rubber), the mold needs to be adjusted or repaired. For example, a professional mold grinder can be used to grind the mating surface of the mold and reduce the gap. Check if the parting surface of the mold is flat. If there is any unevenness, silicone rubber is prone to overflow from the parting surface under injection pressure and form burrs. Precision grinding machines can be used to adjust the parting surface to achieve a high flatness, generally requiring the flatness error of the parting surface to be controlled within 0.005mm. Optimize mold temperature control The mold temperature has a significant impact on the flowability and curing properties of silicone rubber. If the mold temperature is too high, the flowability of silicone rubber will increase, making it easier to produce burrs. The mold temperature can be appropriately reduced. For example, for general hot vulcanized silicone rubber products, the mold temperature can be controlled between 120-180 ℃, and the specific temperature should be adjusted according to the vulcanization characteristics of the silicone rubber and the thickness of the product. By installing a cooling system (such as setting up cooling channels inside the mold) to control the mold temperature, the occurrence of burrs can be effectively reduced.   2. In terms of molding process Adjust injection pressure and speed Excessive injection pressure is a common cause of flash. When silicone rubber is injected into the mold cavity with excessive pressure, it will force the silicone rubber to extrude from the small gaps in the mold and form flying edges. The injection pressure can be appropriately reduced, for example, for small silicone rubber products, the injection pressure can be reduced from the original 5-10 MPa to around 3-5 MPa, but it is necessary to ensure that the silicone rubber can completely fill the mold cavity. Injecting too quickly can also cause flying edges. Excessive speed can cause turbulence in the mold cavity, increasing the possibility of silicone rubber overflowing from the mold gap. Slow injection can be used, such as reducing the injection speed from 100-200mm/s to around 50-100mm/s. Control vulcanization time Excessive vulcanization time can cause silicone rubber to continue expanding within the mold cavity, thereby increasing the risk of flash formation. If the vulcanization time is too short and the product is not fully vulcanized, it can also cause difficulty in demolding, which may tear the product and produce burrs. The optimal vulcanization time needs to be determined through experiments based on the vulcanization system and mold temperature of silicone rubber. For example, for hot vulcanized silicone rubber, the vulcanization time is generally between 1-10 minutes, and the specific time should be based on the complete vulcanization of the silicone rubber and the product performance meeting the requirements.   3. In terms of silicone rubber materials Choose the appropriate silicone rubber material Different silicone rubber materials have different flowability and vulcanization characteristics. If silicone rubber with high fluidity is used, the flash problem will be even more severe. You can choose silicone rubber with moderate fluidity, such as high branched structure silicone rubber, which has relatively low fluidity. At the same time, attention should be paid to the hardness of silicone rubber. Silicone rubber with higher hardness is relatively less likely to produce burrs during the molding process. Check the quality of silicone rubber material Check whether the silicone rubber contains impurities or has deteriorated. Impurities may affect the flow and curing of silicone rubber during the molding process, leading to the formation of burrs. If silicone rubber deteriorates, its properties will change, such as faster or slower vulcanization speed, which will also affect the molding quality. Simple testing can be performed on silicone rubber, such as observing its appearance, measuring its viscosity, etc., to ensure that high-quality silicone rubber materials are used.

What are the functions of silicone gloves in the kitchen? Entering the modern kitchen of a family, a pair of brightly colored, smooth and shiny silicone gloves is quietly replacing the former thick cotton hand protectors and has become the new favorite in the pots, pans and other utensils. Once upon a time, our ancestors could only rely on layers of old cotton cloth to cautiously explore the safe gaps in the scorching heat. Now, silicone can wrap the hands and calmly face the flames and scalding temperatures.   Silicone, this once exclusive polymer material for industrial kitchens, has already shed its luxurious coat and infiltrated the kitchens of the mortal world. Its true magic lies in its extraordinary thermal stability - able to withstand 200 degrees of heat waves without cracking or becoming brittle, far from ordinary plastics daring to imagine. When your hands are wrapped in this flexible fortress to take out the crispy bread from the oven, or flip the oily frying pan, it's like passing through flames but still covered in armor, without any worries of burning. Silicone silently transforms into a loyal high-temperature shield, firmly protecting the safety of every touch of your fingertips on the hot cookware.   What is even more delightful is its unparalleled easy to clean nature. The awkward dilemma of oil stains and flour stubbornly adhering to the texture between thick fabrics like a spell in the past, can be instantly restored with just a rinse of water today, and that beautiful color is instantly restored. Not only that, its airtight shield like surface effectively isolates liquid from seeping into the interior, and from then on, the hot and humid annoyance of "wet wipes" in the kitchen naturally dissipates.   The flexible posture of silicone gloves provides the widest stage for the agile display of fingers. Whether it's the sweet and sour fish fillet that is flexible and hard to grasp, or the mold demoulding that needs precise control, the silica gel fits every inch of the curve like the second layer of skin, showing dexterity. Unlike those clumsy old-fashioned cotton gloves, which are as heavy as armor and almost numb to touch, silicone gloves can transmit sensitive heat to fingertips lightly, as if separated by a layer of fine yarn, allowing people to still feel the moderate temperature pulse.   Of course, we also need to acknowledge its slight limitations - such as the possibility of being scratched by the blade after long-term use, or small damages at the edges that may allow moisture to seep in. But these are far from insurmountable obstacles. High quality silicone products have repeatedly made breakthroughs in toughness. When we choose products with moderate thickness and superior craftsmanship, and carefully maintain them, their life can be accompanied for a long time.   The clever creativity in the kitchen is the light prelude played by technology for the ancient stove fire life. Silicone gloves convey the most essential desire of modern home kitchens with silent toughness: they not only protect the skin from scalding, but also make cleanliness easily accessible, and capture the most authentic temperature pulse for us in every fingertip touch, making the cooking rhythm smoother and more elegant.

What are the advantages of silicone ice cubes? In the scorching summer, the refreshing feeling brought by a chilled drink is irreplaceable, and the protagonist at this moment is often the transparent ice crystals condensed in that cube. However, if you still struggle with traditional hard plastic ice grids that cannot be easily removed from the mold, and struggle between tapping and hot water flushing, have you ever turned your attention to the quietly transforming new ice making equipment? It is gently reshaping the way this frost flavor is born in the kitchen with unexpected convenience and ingenuity. Seemingly ordinary and unremarkable ice grids, after material transformation, hide extraordinary life philosophies - transforming stubborn hard boards into soft forms, making trivial operations elegant in a moment. What kind of humanized craftsmanship is hidden behind the small silicone ice tray? Today, we will take you to understand the advantages of silicone ice trays.   The soft posture of Bingge is the first "caring care" bestowed by silicone. Food grade materials are not hard or brittle in the cold winter, maintaining their original flexibility and elasticity at minus 40 degrees Celsius. From now on, they will no longer be afraid of violent strikes - just slightly bend or gently push the bottom of the ice tray, and the crystal clear ice cubes will be like gently caressed petals, falling out cleanly. The expectation of drinking ice is no longer complicated. This flexible charm further surpasses the single functional barrier of silicone ice shelves. The curve design of the mold is no longer strict and cold. You can create various shapes of heart-shaped snowflakes, mini teddy bear ice cubes, and even let dessert experts transform into smooth ones by injecting chocolate slurry and allowing it to cool and solidify, resulting in exquisite snacks; Add a small amount of batter and instantly transform into a delicate cake. With silicone in hand, the creative realm of the kitchen suddenly expands. Silicone material responds to the tedious noise of the kitchen with a quiet and gentle touch: it is lightweight and can be folded and stored in the gaps of drawers without any hindrance, bidding farewell to the dominance of traditional ice trays occupying half of the refrigerator. Cleaning is also a relaxing moment for fingertips, with flowing water brushing past and leaving no trace of dirt; If there is food residue, it can be boiled in boiling water to restore cleanliness and freshness, unlike hard plastic crevices that hide dirt and make people worry. This clean and reassuring quality comes from non-toxic food grade certification and stable chemical properties from low to high temperatures. When fingertips touch the delicate touch, when ice melts into beloved drinks, silently interpreting a comforting sense of health care.   The silicone ice grid subverts the old tradition of ice making with its gentle curves, making even the most ordinary freezing process a light ritual at the fingertips. It may be insignificant, but it quietly improves our sense of control over the details of life. Every convenient demoulding and every sweet Dim sum contains a little daily surprise. This inconspicuous small object in the corner of the kitchen is precisely using its flexibility and wisdom to silently bring people closer to the beauty of life.

As we all know, silk screen glass materials mainly include silk screen, mesh frame, ink, etc. Among them, ink is necessary for silk screen printing. Without ink, there would be no pattern. Next, let's talk about which types of silk screen ink can be classified according to their different characteristics.   According to the processing temperature, it can be divided into: 1. Ordinary glass ink: Natural drying, surface drying time is about 30 minutes, actual drying time is about 18 hours. Suitable for printing various types of glass and polyester adhesive paper. 2. High temperature glass ink: also known as high-temperature tempered glass ink, with a sintering temperature of 720-850 ℃. After high-temperature tempering, the ink and glass are firmly fused together. Widely used in building curtain walls, automotive glass, household appliance glass, etc; 3. Low temperature glass ink: Concave convex plate and color crystal ink, baked at 100-150 ℃ for 15 minutes, with good ink adhesion and strong solvent resistance 4. Glass baking ink: High temperature baking, sintering temperature around 500 ℃. Widely used in industries such as glass, ceramics, and sports equipment. 5. Tempered glass ink: Tempered glass ink is strengthened by instant baking and instant cooling at high temperatures of 680 ℃ -720 ℃, which melts glass pigments and glass bodies into one, achieving color adhesion and durability. After coloring and strengthening, the glass has rich color, high structural strength, safety, and resistance to atmospheric corrosion. It has good corrosion resistance and covering power.   According to the solvent used for ink adjustment, it can be divided into: 1. Water based glass ink: Developed by Zhenbo Ink as one of the first successful batches, it is a non-toxic and organic solvent free glass ink that meets EU environmental standards. It is easy to clean and will not cause harm to personnel. 2. Oil glass ink: Due to the use of ink adjusting solvents and diluents, it has a strong irritating odor that evaporates. Long term use can cause significant physical harm to operators;   According to environmental standards, it can be divided into: 1. Lead containing glass ink: Ink pigments contain metallic substances such as chromium, nickel, and lead, which often pose certain pollution hazards. 2. Lead free environmentally friendly glass ink: Due to the use of ink pigments with relatively low lead content, it greatly reduces the harm of pollution, so it is often referred to as environmentally friendly glass ink. The above is the classification of screen printing ink.  

Products produced with food grade silicone can directly touch the body and human esophagus without causing any harm, and there are many common silicone products for infants, including bibs, silicone pacifiers, silicone toys, silicone scrapers, silicone drinking cups, as well as silicone fresh-keeping covers, silicone folding cups, etc.   The development of silicone products had already moved to China before 1980, and silicone products were very popular and widely used in developed countries such as Europe and America. However, in China, although the development of various silicone products is still in its infancy, with the continuous improvement of people's living standards, everyone's awareness of health and the improvement of silicone products are increasingly valued. In our current life, silicone products have become the preferred choice for most consumers, especially for making household items, which has been largely proven. Food grade silicone products are made of high-quality materials that are resistant to high temperatures, easy to clean, have a long lifespan, and are soft and comfortable. The important thing is that the hardness can be adjusted and changed according to the environment and requirements of the product. Nowadays, most silicone product manufacturers have realized that silicone products are not only of high material quality, but also of high quality. More and more important. As for silicone bibs, in addition to the materials that many testing agencies need to certify, design and color are also very important. If silicone products can make greater discoveries and breakthroughs in production processes and materials, then in the future, silicone products will occupy a large part of household products, especially food grade silicone products, which will be the main users in mother and baby, home, life, and gifts.

With the widespread application of silicone materials, we will see more and more various silicone products in daily life. As a result, people's questions about it will also increase. Recently, many netizens have asked whether silicone products with high hardness will become brittle? The hardness of silicone products. After silicone products reach a Shore hardness of 60 degrees or above, their tear resistance and elasticity will decrease linearly, leading to the brittleness of silicone products. Most of the silicone products produced by our manufacturers have a hardness below 60 degrees on the Shore hardness scale, except for silicone buttons and some special products requested by customers. Environment and duration of use. During use, if the ambient temperature is too low, the usage time is too long (such as frequent use for several years), and the environment is too humid, it will accelerate the aging rate of silicone products and cause aging phenomena. Brittle is one of its aging phenomena. Especially for silicone products for infants and children, we must clean and disinfect them promptly after use. It should be stored in a ventilated and cool place, avoiding direct sunlight. Some mistakes during the production process. Unreasonable mold design structure can lead to various problems in the production process, such as mold fracturing and brittle finished products. During the processing of silicone products, if the machine temperature is too low, the heating time is too long, and the secondary vulcanization time is too long, it will cause the silicone products to become brittle easily. Silicone material. The inferior silicone material does not meet the performance standards in all aspects. For example, the most basic tear resistance and elasticity properties directly lead to the brittleness of silicone products. So when choosing a manufacturer, we should check their production qualifications and corresponding testing reports for silicone materials.

The products produced by laser engraving and silk screen printing may appear similar on the surface, but in reality, there are still significant differences.   1. The fonts and patterns of laser engraved products have translucency; Screen printed products are opaque. Laser engraving is similar to the carving form of stone tablets, and there will be a concave feeling when touched by hand. 2. For laser engraved products, the color of the font and pattern is the material color, and the base color is the ink color; At this point, silk screen products are exactly the opposite of laser engraved products. 3. In terms of wear resistance, silicone products using laser engraving technology are higher than those using screen printing technology. The patterns carved from radium will not wear out over time, but their disadvantage is that they cannot be as colorful and vivid as silk screen products. 4. The principles of the two processes are different: laser engraving uses laser burning to treat the surface of the product, which belongs to the optical principle; Screen printing is a physical principle that allows ink to adhere to the surface of a product. 5. Price difference: The price is determined based on the difficulty and size of the font and pattern of the product to be processed. The specific price will be quoted in detail by professional laser engraving and screen printing manufacturers based on the actual situation. The full name of silk screen printing is screen printing, which works by exposing graphics to a screen and performing ink leakage printing through ink. So screen printing is also plate printing. The same screen printing plate only needs to change the color of the ink to print various different colors according to customer requirements, and multiple colors can be printed on the same pattern at the same time. Nowadays, multi-color screen printing machines are very popular in the market. Laser engraving, due to its laser burning process, results in a concave pattern when touched by hand; Screen printing does not damage the surface of the product. After printing and baking, touching with your hand will reveal that the graphic is convex upwards. Compared to laser engraving, screen printing has a richer and more three-dimensional pattern hierarchy, and the color of the pattern can also be varied. Moreover, the screen printing process does not damage the surface of the product. But the silicone products carved with radium are more wear-resistant and transparent. Both have their own advantages and disadvantages, and are indispensable processes in our silicone products.

How to choose high-quality food grade silicone products? In daily life, food grade silicone products can be seen everywhere, such as baby pacifiers, silicone kitchenware, baking molds, etc. They are highly favored by consumers due to their softness, high temperature resistance, and ease of cleaning. However, the quality of silicone products on the market varies greatly, and if low-quality products are not carefully selected, they may pose a threat to health. So, how to choose high-quality food grade silicone products?   1. Check the authentication label Legitimate food grade silicone products will pass relevant authoritative certifications, which is an important basis for judging their quality. Common certification marks include FDA certification in the United States and LFGB certification in the European Union. FDA certification is a safety certification for food contact materials in the United States. Obtaining this certification for silicone products means that they meet the safety standards for food contact materials in the United States and will not release harmful substances into food under normal use. LFGB certification is the EU's strict certification standard for food contact materials, with more stringent requirements and covering more testing items. When purchasing, carefully check whether there are these certification marks on the product packaging or instructions. If not, the safety of the product is questionable and it is not recommended to purchase. For example, a high-quality silicone nipple is usually clearly labeled with FDA or LFGB certification marks on the product, allowing parents to buy with confidence.   2. Observe the appearance and texture High quality food grade silicone products often have distinct features in appearance. Firstly, the color should be uniform and natural, without being too bright, dazzling, or unevenly distributed. This is because inferior silicone may add a large amount of pigments to cover up the defects of the raw materials, while high-quality silicone uses natural or safe pigments with soft and uniform colors. Secondly, the surface should be smooth and flat, without obvious bubbles, impurities, burrs, or cracks. You can gently touch the surface of the product with your hand to feel its texture. High quality silicone has a soft and elastic feel, and can quickly return to its original state after pressing; Poor quality silicone may have a rough feel, poor elasticity, slow recovery after pressing, and even leave obvious indentations. For example, when selecting a silicone cake mold, if bubbles or cracks are found on the surface of the mold, it not only affects the appearance, but may also cause leakage and other problems during the baking process, affecting the production effect of the cake.   3. Judging by smell Food grade silicone itself is odorless or only has a faint silicone smell, and does not emit pungent chemical odors. When purchasing, you can get close to the product and smell it. If there is a strong pungent smell, it is likely that inferior raw materials have been used or harmful chemicals have been added. Such products must not be purchased. Some unscrupulous merchants, in order to reduce costs, may use recycled silicone or add some inferior additives, which can produce harmful gases during the production process and remain in the products. When products come into contact with food, these harmful substances may migrate into the food, posing a threat to human health. For example, if a newly purchased silicone tableware has a pungent odor that persists even after multiple washes, it indicates that the product's quality is not up to standard.   4. Test performance characteristics High temperature resistance: Food grade silicone products need to have good high temperature resistance, generally able to withstand a temperature range of -40 ℃ to 230 ℃. Silicone products can be frozen in the refrigerator for a period of time, then taken out and boiled in boiling water for a few minutes to observe whether they have deformed, softened, faded, and other conditions. If the product can still maintain good performance under these extreme temperature conditions, it indicates that its high temperature resistance is good. For example, silicone baking tools used in high-temperature ovens are prone to deformation or even melting if their high-temperature resistance is poor, which affects safety during use. Tear resistance: High quality food grade silicone has good tear resistance and is not easily pulled apart. You can gently pull the edges or weak areas of the product with your hands to feel its elasticity and toughness. If the product is easily broken, it indicates poor quality and may have a short service life. For example, silicone gloves require frequent stretching during use, and if their tear resistance is poor, they are easily damaged, affecting the user experience. Cleanliness: Food grade silicone products should be easy to clean and not prone to residual stains. You can apply some oil stains or sauce on the surface of the product, then rinse it with water and observe if it is easy to clean. High quality silicone has a smooth surface, making it difficult for stains to adhere. It can be easily cleaned with a gentle rinse; Poor quality silicone may have a rough surface, making it easy for stains to penetrate and difficult to thoroughly clean.

How to deal with yellowing of silicone products? Silicone products are widely used in daily life and industrial production due to their softness, durability, and environmental friendliness, such as silicone phone cases, kitchen supplies, medical accessories, etc. However, many users have found that silicone products may turn yellow after a period of use, especially transparent or light colored silicone products. This not only affects aesthetics, but may also raise concerns about its safety. So, why do silicone products turn yellow? How to effectively handle it?   Reasons for yellowing of silicone products 1. Oxidation reaction The silicon oxygen bond (Si-O) in silicone gel is prone to oxidation reaction when exposed to air, high temperature, or ultraviolet radiation for a long time, generating chromophores (such as carbonyl groups) and causing the surface to turn yellow. 2. Ultraviolet irradiation Ultraviolet radiation is one of the main factors causing the aging of silicone gel. Long term exposure to sunlight can cause changes in the molecular structure of silicone gel, accelerating yellowing. 3. Environmental pollution Dust, oil fumes, nitrogen oxides (NOx) and other pollutants in the air adhere to the surface of silicone gel, and long-term accumulation can lead to yellowing. 4. Contact with chemical substances If silicone products come into contact with strong acids, strong alkalis, or certain cleaning agents (such as bleach, disinfectant), they may undergo chemical reactions, resulting in surface discoloration. 5. Material issues Low quality silicone may contain impurities (such as iron ions) or incompletely polymerized monomers, which are more prone to oxidation and yellowing.   The treatment method for yellowing of silicone products 1. Home cleaning and restoration plan Suitable for silicone products with slight yellowing, simple operation and low cost: Toothpaste wiping: Apply white toothpaste to the yellowing area, gently wipe with a soft cloth, and then rinse with water. Baking soda paste: Mix baking soda with warm water in a ratio of 1:3, apply to the yellowed area and let it sit for 2 hours before brushing. Hydrogen peroxide soaking: Soaking in 3% concentration hydrogen peroxide for 6-8 hours can decompose deep pigments (suitable for white silica gel). Citric acid scrubbing: A 10% citric acid solution combined with a nano sponge is suitable for wiping oily yellow spots. White vinegar soaking: Mix white vinegar with water at a ratio of 1:2 and soak for 15-30 minutes to reduce yellowing. 2. Chemical methods for removing yellowing Suitable for stubborn yellowing, but should be handled with caution: Bleach treatment: Dilute bleach and soak (only for white silicone), pay attention to concentration and time. Alcohol wiping: Medical grade alcohol can remove some stains and yellowing, but it may affect the elasticity of silicone. 3. Professional renovation technology Suitable for valuable silicone products (such as high-end headphone covers, medical accessories): Ozone fumigation: Professional equipment decomposes pigment molecules to restore transparency. Plasma cleaning: High energy particles bombard the surface to thoroughly remove the oxide layer. Nano titanium dioxide coating: forming a protective layer to delay yellowing.