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

What are the differences between EPDM rubber and silicone rubber? First of all, EPDM rubber is a terpolymer of ethylene, propylene and non-conjugated diene. Diene has a special structure, and only one of the two bonds can be copolymerized, and the unsaturated double bond is mainly used as a cross-chain. The other unsaturated one will not become the main polymer chain, only the side chain. The main polymer chain of EPDM is fully saturated. This feature makes EPDM resistant to heat, light, oxygen, and especially ozone. EPDM is essentially non-polar, has resistance to polar solutions and chemicals, has low water absorption, and has good insulation properties. Silicone rubber is classified into two types: hot vulcanized silicone rubber and room temperature vulcanized silicone rubber according to its vulcanization characteristics. According to the performance and use, it can be divided into general type, ultra low temperature resistant type, ultra high temperature resistant type, high strength type, oil resistant type, medical type and so on. According to the different monomers used, it can be divided into methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, fluorosilicone, nitrile silicone rubber, etc. However, silicone rubber has excellent heat resistance, cold resistance, dielectric properties, ozone resistance and atmospheric aging resistance. The outstanding performance of silicone rubber is that it can be used at a wide temperature range from -60°C (or lower temperature) to Long-term use at +250°C (or higher temperature). However, silicone rubber has poor mechanical properties such as tensile strength and tear strength. Its physical and mechanical properties are not as good as most synthetic rubbers at room temperature. In addition to nitrile silicone and fluorosilicone rubber, general silicone rubber is resistant to oil and solvents. The performance is not good, so silicone rubber is not suitable for occasions under ordinary conditions, but it is very suitable for many specific purposes.

According to related reports, BASF recently announced that it will build a commercial production facility for black powder in Schwarzheide, Germany, whose raw materials will be derived from battery recycling and production waste. This investment further strengthens BASF's Schwarzheide site as a center for the production and recycling of cathode active materials (CAM).   With many electric vehicle manufacturers and battery producers in Central Europe, Schwarzheide is an ideal location for building a battery recycling-related industry. The investment will provide around 30 new production jobs and is scheduled to start in early 2024.   The first step in the battery recycling process is mechanical processing (of used batteries) to obtain a substance called "black powder". These black powders contain a large amount of important metals used in the production of cathode active materials: lithium, nickel, cobalt and manganese, and they will be used in BASF's planned new commercial hydro-smelting plant around 2025 to realize the recycling of used batteries.

What is the cause of insufficient resilience of silicone rubber products? We all know that silicone rubber products are widely used in various fields mainly due to its good toughness and softness. Silicone rubber products are soft, tear-resistant, and do not deform, and are widely used in life. However, once silicone rubber products lose these unique excellent properties, they become meaningless. Some common silicone sealing products will also experience product deformation and insufficient toughness after long-term use, thus losing their original performance. The lack of toughness of the product is mainly due to the various additives added in the raw materials, which will cause the product to have different properties. Among them, "white carbon black" is the main reason for the lack of toughness of the product, and white gray black is the main composition of the raw material of silicone rubber. One, the silica used in the production of materials with different hardness is also different, and the appropriate proportion of addition can also make the surface activity in the raw material. In addition to raw material additives, the molding vulcanization of the product also has a certain impact, and the elasticity of the product is directly related to the hardness of the raw material. When molding vulcanization, adding too much vulcanizing agent will cause the fluidity to be too active, and the product produced is either too soft or too high in tension, and adding too little vulcanizing agent will cause the product to be vulcanized and unable to form. Secondly, the control of temperature and time during the molding process is also very important. Too short vulcanization time will cause the product to be too soft and long-term use will gradually lose its resilience. Too high molding temperature will cause the product to be too brittle, and the resilience will be too weak and easy to break.  

What we usually say is medical silicone, which belongs to the silicone that can be used in medicine, but it is limited to the external use, and cannot be used inside the human body.This type of silicone may only have a food-grade standard.However, it can be used in the medical industry. It can be used in contact with the skin, such as medical silicone tube, respirator silicone mask, etc., but it cannot reach the medical level and biocompatibility test.In other words, this type of silicone is fine as long as it's not used in the body. Medical grade silicone, indicating medical grade certification and biocompatibility testing.Medically, it can be used inside the human body, including in contact with human blood.The safety level is higher than ordinary food level and medical level. In general, medical-grade silicone can also be called medical silicone. Conversely, medical silicone cannot be called medical-grade silicone because medical-grade silicone has a higher safety level.If you require a very high level of safety, be sure to check for biocompatibility reports or other medical-grade reports.

When we contact the silicone seal ring, we will find that there are many colors of the seal ring, the most commonly used is white and black, so which color of the seal ring performance is better?I'm sure many people will be curious about this question.   The engineer told us that the color of the silicone seal ring has nothing to do with the performance of the silicone seal ring.The color of the silicone seal ring is just the color paste added in the process of processing and production, making the raw material of silica gel stained with color. To put it simply, no matter what color of silicone sealing ring, its performance and characteristics are the same, there is no other difference.Therefore, the white silicone seal ring and the black silicone seal ring is actually completely the same, there is no one is good which is bad.   The only thing that distinguishes the performance of the silicone seal ring is that different materials are used or some special materials are added to improve the performance and characteristics of the silicone seal ring for different use environments. Now you should know that the performance of the color seal ring and the white seal ring is the same.

Conductive silicone rubber usually means that the volume resistance is within 10 to the 9th power of ohm cm. Conductive rubber is divided into anti-static conductive rubber.   1.The surface resistance of antistatic silicone rubber products reaches 10 to the power of 5-12, which is an antistatic level. Within the 9th power of 10, the 6-8th power of 10 is permanent, but the performance of the raw material will deteriorate, and the 9th power of 10 is short-term antistatic. 2.The surface resistance of conductive silicone rubber products is less than 10 to the 5th power, which is the conductive level. The volume resistivity is generally 3-10Ω·cm, the relative density is 1.15, the hardness (Shore A) is 60, the tensile strength is 5.7MPa, and the relative elongation is 265%. It can be mixed and mixed with methyl vinyl silicone rubber (raw rubber), white carbon black, conductive filler, structure control agent and organic peroxide. When the volume resistance is less than 10 ohm cm, the conductive rubber has electromagnetic shielding function.   Many silicone products are used in electronic and electrical components, which must be antistatic. Antistatic agents can be added when producing silicone products.  

Silicone rubber buttons are widely used in color TV sets, air conditioners, calculators and electronic game consoles. Screen printing quality directly affects the quality of the product appearance. 1. Key mold production Qualified mold not only to achieve the technical indicators of the keys, but also to meet the requirements of screen printing. Ensure that the key surface surface finish is high, only the smooth surface can print the character edge clear and three-dimensional words. Conversely, the rough surface printed characters must be uneven surface, the edge of the burr. The best screen printing effect is based on good mold. 2. Silicone rubber formula The raw material formula of the silicon rubber key sheet that needs screen printing must strictly control the content of release agent, not only consider the release convenience but ignore the screen printing binding force. Release agent content is too high, printing after drying, gently wipe off. Demoulding agent is too high, transparent or white key pieces by printing drying will cause yellow phenomenon, seriously affect the appearance of the product quality. 3. Drying temperature Post-press drying temperature is too high, often make light color and white key pieces yellow phenomenon, too low temperature will cause poor binding force. Therefore, strict control of temperature is one of the keys to ensure the binding force of printing. Drying products must be cooled before they can be loaded into the turnover box, otherwise light or white products will be yellow and affect the appearance.

The structure of PU resin influences the material's ethanol resistance, and the solid particles are optimized to obtain the PU coating for high-performance silicone rubber keys, as shown below:   1. Resin structure affects the ethanol resistance of the coating, and hydroxyl acrylate is more resistant to ethanol than hydroxyl polyester; At the same time, the resin with high hydroxyl value and glass transition temperature has higher ethanol resistance.   2. The solid particle filler with small particle size can effectively fill the internal void of the coating, which is manifested as improved ethanol resistance. With the increase of solid particle size, the ethanol resistance of the coating decreases rapidly.   3. Compared with the existing PU wear-resistant coating, the ethanol resistance of the improved PU coating is improved, which is better in ethanol resistance and RCA performance, meeting customer requirements.

Does mixed silicone rubber burn easily?Some friends usually ask this question before purchasing. Today we will find out whether mixed silicone rubber is inflammable. The mixed silicone rubber is made of raw rubber, silica, silicone oil and other auxiliary materials mixed at high temperature. It is safe, environmental friendly, non-toxic, tasteless and resistant to high and low temperature.The mixed silicone rubber can be stored for a long time at room temperature. The surface of the rubber will become yellow and crack under high temperature irradiation, and it is not inflammable. The only flammable phenomenon of mixed silicone rubber is that when adding odorless vulcanizing agent, the static electricity generated by the constant friction between the rubber and the cylinder will directly react with the vulcanizing agent, which may lead to the ignition phenomenon. When adding vulcanizing agent, we can reduce the speed of the roller of the refining machine, or we can gradually add the vulcanizing agent in a small dose. In addition, mixed silicone rubber can also be added additives to make flame retardant silica gel, even in the state of open fire can be made completely non-combustion, flame retardant silica gel is mainly used in industrial equipment production and manufacturing links.  

Olababy baby food spoons are made of 100% silicone and 100% silicone, perfect for easy breastfeeding. Made of 100% pure soft silicone, our baby feeding spoons are safe for your baby, easy to sterilize and dishwasher safe. Olbby baby food spoons are dishwasher safe and BPA free. This is the perfect tool to get your baby started on solid foods. The flexible spoon is made of 100% BPA and chemical-free food-grade silicone, making it easy for your baby to pick up and ideal for feeding. The flexible spoons can also act as a great teether and are ideal for accessing the back molars during - The small buckets are made from 100% food grade silicone. Made from medical grade silicone and platinum, our spoons are gentle on gums and protect your baby's teeth, mouth and face. The spoon you choose is completely free of BPA, BPS, PVC, cadmium, latex, lead, phthalate and any other chemicals, giving you the confidence that your little ones are using the safest and cleanest products. There are several ways to determine if your baby products, such as baby food spoons, are made from high quality silicone. There is no doubt that silicone is a useful material for many baby foods, especially spoon foods. Silicone is a non-toxic rubber material that is malleable enough to make things like silicone spoons. Silicone has largely replaced plastic as the material of choice for spoon-feeding baby products. Silicone bottle spoons offer an easier way to feed your baby semi-solids. Vavita is confident that this product will ease the transition for parents and children. The Babys First Foods Baby Spoon is designed to safely introduce babies to solid foods for the first time. Busy Baby's Teething and Learning Spoon eases your baby's teething needs and helps with self-feeding. For children under 3 years old, it can be used as a spoon or as a teething toy. The use of functional silicone grips on the handle helps the child hold and maneuver the spoon, while the handles on the spoon head hold enough food on the spoon for the child to learn to feed on their own. Our BLW utensils are the best baby weaning spoons to use for self-feeding at any stage. If you are looking for the best spoon for your child to learn to eat on their own, this is the spoon for you. The Olababy feeding spoon prevents possible injuries caused by accidental blows to the face, gums and teeth that cut through during breastfeeding.