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

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.

With the progress of science and technology and the development of society, people have been inseparable from plastic products and rubber products in their daily life. Today, I will introduce some simple methods to help you distinguish them.       With the progress of science and technology and the development of society, people have been inseparable from plastic products and rubber products in their daily life. Today, I will introduce some simple methods to help you distinguish them.     First, we start with the difference between plastic and rubber. Simply put, if plastic is deformed under the action of external force, it is difficult to restore to its original state, while rubber is easily restored to its original state. For example, if the rubber O-ring is stretched, it will return to its original shape immediately after loosening it. However, if the plastic product is deformed, it will not return to its original condition. In technical terms, under the action of external force, plastic deformation is plastic deformation, while rubber deformation is elastic deformation. Mainly depends on their molecular structure. The elasticity of plastics is generally less than 100%, while rubber can exceed 1,000% at most.   Secondly, the production process is different. Rubber products have an additional vulcanization process. The silica gel sealing ring has an open porous structure and can absorb many substances. It is a good desiccant, adsorbent and catalyst carrier. The adsorption of silica gel is mainly physical adsorption, which can be regenerated and used repeatedly. Add acid to the alkali metal silicate (such as sodium silicate) solution to make it acidify, and then add a certain amount of electrolyte to stir to form a silicic acid gel; or add acid or Ammonium salts can also generate silica gel.   Finally, plastic products may be repeatedly recycled and reused, while rubber products are not. It can only be processed into reclaimed rubber before being used again. O-rings are usually selected as large cross-section O-rings as possible. In the case of the same gap, the volume of O-rings squeezed into the gap should be less than the maximum allowable value. Silica gel has an open porous structure and can adsorb many substances. It is a good desiccant, adsorbent and catalyst carrier. The adsorption of silica gel is mainly physical adsorption, which can be regenerated and used repeatedly. Add acid to the alkali metal silicate (such as sodium silicate) solution to make it acidify, and then add a certain amount of electrolyte to stir to form a silicic acid gel; or add acid or Ammonium salts can also generate silica gel.

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.

The report said 82 per cent of Gen Z Singapore consumers surveyed said they had tried "cashless shopping", up from 74 per cent of Gen Y (born between 1980 and 1995) consumers. Digital payments are profoundly affecting and changing the way young Singaporeans shop. Seventy percent of Gen Z respondents said they would be willing to go to a store with a self-checkout device, with another 70 percent of those willing to accept biometric payments. The study found that about 60 per cent of Singapore consumers have tried "cashless shopping" for reasons including faster speed and efficiency (47 per cent), convenience (47 per cent) and ease of tracking and tracing financial records (43 per cent). The type of cashless transaction singaporeans were most likely to make was to pay bills, at 62 per cent. Another 59 percent and 56 percent said they would go cashless for public transportation-related transactions, as well as taxi rides and ride-sharing payments. The Visa survey found that 74 per cent of Singaporean consumers are using contactless cards, with another 84 per cent using them at least once a week. Other digital payment methods widely used locally include online card payments (81 percent), mobile contactless payments (49 percent) and swiping/inserting payments (48 percent). About 80 percent of Singaporean employees aged 18 to 24 would be willing to work remotely overseas, according to a 2021 survey by Randstad, a leading global staffing company. Only half of workers aged 55 to 67 expressed interest in working remotely overseas. Chaya Das, managing director of Randstad Singapore, said that the younger generation prefers remote working to older ones mainly because they have grown up in a global environment and are open to the opportunities and challenges of intercultural communication.

Silicone rubber has excellent elasticity and high and low temperature resistance, and is widely used as sealing material in the aerospace field. With the development of aerospace engineering, the problem of silicone rubber sealing is gradually prominent, so it is of great significance to the preparation and performance research of silicone rubber sealing material. Taking methyl vinyl silicone rubber for rubber raw rubber, first of all, by changing the vulcanizing agent and reinforcing filler, optimize the silicone rubber reinforcing structure control agent content formula, and then USES the Fe2O3, biomass graphene and carbon nanotubes to heat aging modification of silicone rubber, and USES the talcum powder, graphite powder and 26 type fluorine rubber to low permeability of modified silicone rubber. In the reinforcement study of silicone rubber sealing material, the influence of diisopropyl peroxide (DCP), silica black and structure control agent on mechanical properties and heat aging properties of silicone rubber were studied respectively. The results of DCP showed that with the addition of DCP from 0.4 PHR to 1.6 PHR, the tensile strength of samples aged at room temperature and 250℃×48h increased first and then decreased. The optimum addition of DCP is 1.0 PHR, and the tensile strength of the sample at room temperature and the tensile strength retention rate after aging can reach 7.66MPa and 64%. The results show that gas phase silica has the best reinforcing effect. The optimum filling amount of gas phase silica is 45phr, the tensile strength of the sample before aging and after aging at 250℃×48h can reach 7.66mpa and 4.87mpa, respectively, and the compression permanent deformation is 21%. The study of structural control agent shows that the composite of hydroxyl silicone oil/hexamethyldisilazane has better comprehensive properties. When the total amount of structural control agent is 9phr, the optimal ratio of hydroxyl silicone oil and hexamethyldisilazane is 1:1, the tensile strength of the vulcanized sample can reach 7.36MPa at room temperature, and the tensile strength retention rate of the sample after aging at 250℃×48h And elongation at break can reach 71% and 21% respectively. By comprehensive comparison, the best reinforcing formula of silicone rubber is: silicone rubber raw rubber 100phr, silica fume 45phr, hydroxyl silicone oil 4.5phr, hexamethyldisilazane 4.5phr,DCP1.0phr. The effects of Fe2O3, biomass graphene microsheets and carbon nanotubes on the properties of silicone rubber were studied. The results show that Fe2O3, biomass graphene microplates and carbon nanotubes can significantly enhance the thermal aging properties of silicone rubber. Compared with Fe2O3 and biomass graphene microsheets, carbon nanotubes have the best heat-resistant reinforcing effect. The optimal addition amount of carbon nanotubes is 0.9 PHR, and the tensile strength of the sample can reach 5.36MPa after aging at 300℃×12h, which is 105%, 9% and 17% higher than that of the blank sample, the sample with the optimal amount of Fe2O3 and the sample with the optimal amount of biomass graphene microflakes, respectively. In the study of low permeability modification of silicone rubber sealing material, talcum powder and graphite powder filling modification and fluorine/silicone rubber blending modification are used respectively. The filling modification study showed that both modified talc and modified graphite powder could significantly improve the air tightness of silicone rubber, and the comprehensive performance of the sample with modified graphite powder was better than that with modified talc powder. The optimal filling amount of the modified graphite powder is 15phr, and the gas permeability parameter of the sample is 5.16×10-15mol·m/ (m2·s·Pa), which is 26% lower than that of the blank sample. The study of fluorine/silicone rubber blends shows that the reduction effect of fluorine/silicone rubber blends on the permeability of vulcanized rubber is significantly better than that of modified talcum powder and modified graphite powder. When the total amount of fixed raw rubber is 100phr and the fluorine rubber blend ratio is 30%, the comprehensive performance of the blend is the best. The 200% fixed elongation stress of the sample is 38% higher than that of the sample without blending, and the oil resistance volume change and gas permeability parameters are 12% and 45% lower, respectively.