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

The selection of vulcanization temperature generally considers the variety of raw rubber and the selection of vulcanization system: The selection range of vulcanization temperature for ordinary sulfur vulcanization system is 130~158 ℃; The selection range of vulcanization temperature for effective and semi effective vulcanization systems is 160~165 ℃; The temperature of the resin or peroxide vulcanization system should be between 170 and 180 ℃. Thick or threaded products should be vulcanized at low temperature for a long time, while thin products should be quickly vulcanized at high temperature. The selection of low-temperature vulcanization for hard products slows down the rate of reaction heat generation, helps dissipate heat, and reduces the internal temperature of the product to meet the requirements of vulcanization and prevent cracking.

This process has high quality requirements and is composed of silica gel and plastic liquid. This product has good thermal stability, cold resistance, good electrical insulation, combustion does not produce toxic substances and other characteristics. Therefore, it has become an irreplaceable material in the design of health care products, automobiles, baby products, medical supplies, diving supplies, kitchenware and silicone sealing products.   Extrusion molding, extrusion silicone products are usually extrusion silicone molding through the extruder, the general shape of extrusion silicone is long, tubular can be arbitrarily cut, extrusion process of the product shape is relatively single, mostly bar shape. Silicone rubber tubes are widely used in medical and mechanical equipment fields. It can also be used as a cache in packaging materials.   The silicone rubber is mixed with silica black, silicone oil, etc., and then rolled into a sheet. The film prepared by the calendering method has obvious difference between the longitudinal physical and mechanical properties and the transverse physical and mechanical properties, which is called the calendering effect. Specifically, the longitudinal tensile force of the film is larger than the transverse tensile force, the elongation of the transverse tensile force of the film is larger than the longitudinal tensile force, and the longitudinal contraction of the film is larger than the transverse contraction. The pressure effect is caused by the orientation of macromolecules and acicular and sheet complexes in the compound in the direction of pressure. Compound composition, calendering temperature, speed, speed ratio and so on have certain influence on the size of calendering effect. Suitable for large products, such as silicon film, silicone plate, etc. Injection mold operation method: injection mold or injection mold, suitable for relatively smooth or simple products, do not need mold line to save labor and time, the product or model you want to copy with plastic plate or glass plate surround, vacuum silica gel directly into the product above, after the silicone dry molding, take out the product, The injection mould is ready (Note: The injection mould is generally easier to release with soft silicone, which will not damage the products in the injection mould). It is a combination of solid and liquid, using products such as mobile phone covers, luggage covers, etc. Fast vulcanization, strong viscosity, good fluidity, easy to defoam. Catalyzed by platinum complex, non-toxic, odorless; Excellent thermal stability and cold resistance (use temperature -60° C ~200° C), after forming, air permeability, heat resistance, high tensile strength, excellent anti-slip performance; No pollution; Low hardness; The planting adhesive is firmly bonded. High tear resistance, high transparency, good tensile properties. Wear resistance, wash resistance, high temperature resistance, high three-dimensional layer sense, fabric smooth, soft, soft texture is excellent, good elasticity, wash and dry cleaning resistance. Used on cloth, it has anti-aging effect. For example, insulating silicone gloves, rain shoes and so on.

Conductive rubber is mainly composed of resin matrix, conductive particles, dispersing additives and auxiliaries. At present, the conductive rubber used in the market is mostly filler type.   Filler conductive rubber resin matrix, in principle, can use a variety of adhesive types of resin matrix, commonly used thermosetting adhesives such as epoxy resin, silicone resin, polyimide resin, phenolic resin, polyurethane, acrylic resin and other adhesive systems. These adhesives form the molecular skeleton structure of conductive rubber after curing, which provides mechanical properties and bonding properties, and enables conductive filler particles to form channels. Because epoxy resins can be cured at room temperature or below 150 ° C and have rich formulation-designable properties, epoxy-based conductive rubber is currently dominant.   Conductive rubber requires conductive particles themselves to have good conductive properties. The particle size should be within the appropriate range and can be added to the conductive rubber matrix to form a conductive path. Conductive fillers can be gold, silver, copper, aluminum, zinc, iron, nickel powder and graphite and some conductive compounds.

Surface treatment is a more special treatment, for anything surface treatment can make your products become beautiful, the quality is more superior, feel more soft, each industry has a different surface treatment so in the silicone products industry we surface treatment process is the oil injection process. For example, we just took a bath, the body is more like CR, and the product has the same treatment method, so in order to maintain the quality of the appearance, do you know too much about the appearance treatment?   Many purchasing friends may not be very clear about the effect of oil injection and non-oil injection, especially for some products with relatively small appearance materials, and a process of appearance treatment may be able to change the grade of the entire product, so the effect of oil injection also depends on what kind of quality your silicone products are, what kind of price, etc., if it is accessories type supplies, Consumer goods and so on suggest that you can fully spray feel oil, if it is not the appearance of the internal parts of the entire finished product that there is no need to spray oil treatment. Generally, silica gel manufacturers may feel little different from oil spray after sandblasting the surface of the mold surface, so it is difficult to distinguish the effect of the product with the eyes, or you need to feel the experience, the main characteristics of the oil spray products are smooth feel, relatively high surface finish, relatively flat face, will not produce sticky dust, wear resistance improvement, strong adhesion and so on. The products without oil injection can see that their gloss is not high, and the feeling is not so smooth with the hand, especially the low hardness products will produce sticky dust phenomenon after a long time, the surface aging is accelerated in the humidity or wet place, and it will become very sticky after cleaning several times, of course, this also involves the performance of silicone raw materials and vulcanizing agents. In the purchase can also be based on the above to distinguish the product injection effect.  

Conductive silicone keys generally use two conductive materials: conductive black particles and ink conductive, so how to distinguish the two conductive silicone keys? 1, the black conductive silicone key identification method, to see whether there is a black dot at the bottom of the key, and the dot must have a certain thickness, there are also some dots with texture, if one of the two conditions is met, then the black conductive silicone key. 2, ink conductive silicone key identification method, is also to see whether there is a black dot at the bottom of the key, and this dot is particularly thin, and some are formed with the shape of the bottom of the key - a small black block, which can not be deducted with the nail is the ink conductive silicone key.   When it comes to silicone keys, I believe everyone knows that silicone keys are the same as other keys, as long as the product needs to use buttons, then silicone keys can be used, for example; "Remote control keys, instrument keys, electronic dictionary keys" including all electronic products can be used, then do you know, what makes silicone keys into conductive silicone keys, and how do we identify what is conductive silicone keys?   In conductive silicone keys are usually divided into two conductive materials: 1, (conductive black particles) principle: the contact between conductive particles, forming a conductive path, so that the conductive adhesive has electrical conductivity, the stable contact between the particles in the adhesive layer is due to the conductive adhesive curing or drying caused. Before the conductive adhesive is cured or dried, the conductive particles are separated in the adhesive, and there is no continuous contact with each other, so they are in an insulating state. After the conductive adhesive is cured or dried, the volume of the adhesive shrinks due to the volatilization of the solvent and the curing of the adhesive, so that the conductive particles are in a stable continuous state with each other, and thus show electrical conductivity. 2, (ink conductive) electrically conductive printing ink (electrically conductive printing ink), paste ink made of conductive materials (gold, silver, copper and carbon) dispersed in the binder, commonly known as paste ink. It has a certain degree of conductive property and can be used for printing conductive points or conductive lines.  

Generally, silicone products require insulation and conductivity, so how to distinguish between conductive silicone and antistatic silicone? The surface resistance value of insulating silicone products reaches 10 to the 12th power or more is the insulation level. (There must be many people who think: 10 to the fifth power below is conductive, 5 to the ninth power is anti-static, and more than 9 power is insulation.)   Conductive silicone rubber usually refers to a volume resistance within 9 ohms of 10. Conductive rubber is divided into anti-static grade conductive rubber 1. The surface resistance value of antistatic silicone rubber products reaches 10 to the power of 5-12 between the antistatic level. Within 10 to the 9th power, between 10 to the 6-8 power is permanent but the raw material performance will deteriorate, more than 10 to the 9th power is short antistatic. 2. The surface resistance of conductive silicone rubber products reaches 10 to the fifth power below 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 made of methyl vinyl silicone rubber (raw rubber), white carbon black, conductive filler, structural control agent and organic peroxide. When the volume resistance is less than 10 ohcm, the conductive rubber has electromagnetic shielding function.

First, the difference from the appearance and feel:   1, the fake silicone rubber wristband is easy to deform, and the real silicone rubber will feel the rebound is very good, and the tensile deformation is small.   2, if the real silicone rubber surface is not specially treated, the hand will feel the contrast lubrication, because there will be a layer of grease on the outer surface.   3, the appearance of silicone rubber is easy to stick to impurities such as dust and hair.   Two.Combustion comparison method:   1. The margin of the fake silicone rubber wristband is black after the fire, and the real silicone burning margin is white no matter what color, and the incineration residue is powder.   2. The fake silicone rubber wristband is burning with open fire, black smoke and foul odor. The real silicone rubber wristband is like carbon burning, and the flame is uniform. White smoke, tasteless.   Third, solution method:   Incinerate silicone rubber and touch the smoke with a surface dish, collect the white powder, dissolve the powder in a hot solution of 40% sodium hydroxide (60 degrees), take a drop of the solution into a test tube, add two drops of ammonia molybdate, gently heat it, cool it, add a drop of aniline solution and 3-8 drops of full sodium acetate solution, and observe the color response of the solution. If it appears blue, it indicates that there is silicon element. Proof is silicone rubber. The above three methods can identify the true and false silicone rubber bracelet for you!

Silicone is one of the important raw materials for the development of today's society, and its performance is extended on its tasteless, non-toxic and environmental protection characteristics. Foam silicone temperature range in -65℃-200℃ can be used for a long time and maintain its soft and elastic properties, environmental protection and non-toxic, through SGS environmental non-toxic certification, with excellent electrical properties and chemical stability, water resistance, ozone resistance, climate aging resistance, non-corrosive, with physiological inertia, non-toxic and tasteless, low line shrinkage rate, easy to operate and other characteristics.   1. Silicone material has good sealing performance, high temperature resistance and weather resistance, anti-aging, shock-proof and waterproof, and can fit all kinds of smooth surface materials; 2, can back the tape self-adhesive, better sealing, high temperature adhesive long-term use without falling off. Environmental protection and safety, good insulation, high temperature resistance, small compression deformation, strong resilience, non-toxic; 3, Ruibo foam silicone rubber products foaming uniform, density can be 0.25-0.85g/cm3, Shore hardness 8-30A. Environmental protection, non-toxic, no odor, good resilience, good flexibility, no air bubbles on the surface. High strength, long service life, environmental protection insulation, high and low temperature resistance, compression resistance, acid and alkali resistance, anti-aging, anti-UV; 4, flat surface, uniform foam density; 5, good surface is not sticky, good permeability; 6, the use of 100% high-quality silica gel raw materials, and through strict testing, in line with environmental standards; 7, high temperature resistance: -70-300℃; 8, heat resistance: silicone rubber than ordinary rubber has much better heat resistance, can be used at 150 degrees almost forever without performance changes; It can be used continuously for 10,000 hours at 200 degrees; It can also be used for a period of time at 350 degrees. 9. High foaming ratio; Uniform foaming and good stability. 10. Non-toxic, non-corrosive, chemically inert; 11. Small, uniform and fine foam aperture; 12. Light weight, elasticity, feel good; 13. No migration occurs.   Silicone foam seals are mainly used for supporting electrical appliances, toys, electronics industry, mechanical seals, food and beverage industry mechanical seals, pharmaceutical chemicals and other hardware, medical equipment, sporting goods, audio, lighting, machinery, automotive, and other industries!

What are silicone tubes and what kinds are there?   Silicone rubber hose is also known as silicone rubber pipe. Silicone rubber is a new polymer elastic material. Excellent resistance to high temperature (250~300℃) and low temperature (-40~-60℃). It has good physiological stability and can withstand the harsh conditions of repeated disinfection. It has excellent resilience, small permanent deformation (at 200℃, no more than 50% within 48 hours), breakdown voltage (20-25KV/mm), ozone resistance, ultraviolet resistance, radiation resistance, etc. Ordinary silicone tube: medical silicone tube, food grade silicone tube, industrial silicone tube, silicone shaped tube, silicone hose accessories.   Medical silicone tube resistant to high temperature Medical silicone tube is generally capable of -60~300 ºC. 1. High transparency, high hygiene level, environmental protection, efficient and tasteless, can be high-temperature disinfection and autoclaving; 2. The medical silicone tube has good physiological inertia, will not cause harm to human tissues, will not cause foreign body reaction after entering human tissues, and will not cause inflammation to surrounding tissues; 3. High tensile strength, high tear resistance, low shrinkage, good resilience; 4. Strong resistance to high and low temperatures, will not deform under high temperature, will not produce decomposition of harmful substances, physiological inertia, strong biological aging resistance; 5. High level of hygiene and environmental protection, through the United States FDA and Germany LFGB food grade safety tests. Medical silicone tube is generally capable of -60~300 ºC. Medical silicone tube features: 1. High transparency, high hygiene level, environmental protection, efficient and tasteless, can be high-temperature disinfection and autoclaving; 2. The medical silicone tube has good physiological inertia, will not cause harm to human tissues, will not cause foreign body reaction after entering human tissues, and will not cause inflammation to surrounding tissues; 3. High tensile strength, high tear resistance, low shrinkage, good resilience; 4. Strong resistance to high and low temperatures, will not deform under high temperature, will not produce decomposition of harmful substances, physiological inertia, strong biological aging resistance; 5. High level of hygiene and environmental protection, through the United States FDA and Germany LFGB food grade safety tests. Ordinary silicone tube high temperature: The general temperature range of ordinary silicone tube is -40-200 ° C, and the temperature range of special high-temperature silicone tube can reach -60-300 ° C. Silicone tube aging resistance time is relatively long, if the use of the environment is not the same life will be different, at room temperature can be used for more than 10 years.

Silicone sealing ring, in the long-term adhesion and metal pressing extrusion, after frequent stress resulting in silicone sealing ring does not rebound, no stress phenomenon, as the manufacturer will tell you how to maintain and long-term use of silicone sealing ring in three angles.   Some seals are used in harsh environments for a long time, such as oxygen, heat, and light under the action of aging phenomenon resulting in phase distortion, so in the early stage for the use of silicone seals environment and time, etc. need to consider whether the material and product can maintain a long-term life, elasticity is not affected and so on. Generally start from these three aspects.   The ambient temperature of the silicone seal ring In the process of use, a variety of high and low temperature is a major factor affecting the product, although the silicone material can accept more than 200 degrees to -40 degrees of high temperature, but long-term suitable for harsh heat conditions will accelerate the aging of the silicone seal ring, the higher the temperature, the greater the deformation of the product will be, and the largest force deformation of the silicone material is generally more than 40% will completely lose working performance. Causes the seal to leak and so on. When used at low temperatures, it is recommended to appropriately increase the compression and tensile degree. When used at low temperatures, attention should be paid to the phenomenon of product necrosis and deformation and rupture.   The tensile degree of the silicone sealing ring Tensile degree is one of the main operating capabilities of silicone sealing ring, so in the production of silicone products manufacturers will choose the corresponding pull strength material and various hardness of the use of conditions, so for long-term repeated use of the demand can choose high tensile silicone material processing production, in order to prevent the growth of products over time and affect the performance of the product, Due to the long-term operation of silicone rubber beyond the tensile range of the use of the case will often make the product become relaxed, lose tension, so in sufficient conditions to reduce the tensile degree of work intervention, long-term use of the biggest factor affecting the deformation of silicone material, so reduce the working pressure is the best way to maintain the seal ring.   Selection of raw materials for silicone sealing rings In addition, high quality materials are used in the performance of the product, and the higher the high tensile and product hardness properties, the better the product quality.