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Summarize the eight characteristics of liquid silica gel
Release time:
2019-05-16 12:30
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Summarize the eight characteristics of liquid silica gel
Liquid silicone productsIn addition to maintaining many of the typical characteristics inherent in silicone rubber, such as superior electrical insulation, a wide range of temperature and long-term weathering resistance in harsh environments, there are the following characteristics:
(1) Clean and stable liquid silica gel does not contain solvents and moisture, and has no pollution to the environment; The rubber material is supplied in two components, which are filtered and vented. The two-component mixture can be stored for more than 24 hours at normal room temperature, and can be cooled for more than 2d, without further cleaning.;
(2) The process is simple and fast.
①The two-component rubber is mixed with 1:1, and the batching process is simple;
②For molded products, from ingredients to finished products, in principle, it can be said to be one step, which simplifies the process
The vulcanization speed is fast. For example, for molded products made with porous molds (about 7g of rubber per hole), the vulcanization cycle is 20~30s, which is about 1/12~1/20 of that of ordinary silica gel (4~10min of vulcanization cycle);
④ Unless the product is required to have a special low resistance to compression set, generally do not need to vulcanize;
⑤ The shrinkage rate is low, generally below a few thousandths; ⑥ The coloring process of the product is simple;
⑦ Under normal circumstances, the finished product does not need trimming.
(3) Energy saving According to the estimation of DowCorning company, energy consumption can be reduced by about 75% due to the simplification of the process and the change of the vulcanization method.
(4) low cost liquid silica gel processing production generally only 1 person. According to the calculation of Dongguan Weishun Silicone Technology Co., Ltd., each piece of about 6g of molded products can reduce the cost by 42% due to the reduction of manpower, not including the above-mentioned energy consumption reduction and production space reduction.
(5) less fixed investment, whether molded products or extruded products, can replace heavy machinery light machinery, plant area can also be greatly reduced. What are the advantages of liquid silica gel? It is liquid glue, which has good fluidity, fast vulcanization, safety and environmental protection, and fully meets the requirements of food grade. Liquid silica gel can also be used for coating. Impregnation and infusion of liquid silica gel are made of silica gel products, referred to as LSR in English. It has good elasticity, waterproof and moisture resistance, corrosion resistance to acid, alkali and other chemical substances, and can generally be used to replace living plastic products, such as silicone bottles, pacifiers are more popular and popular a liquid silicone products.
At the same time, liquid silicone is also a silicone material used in human surgery. The plastic industry and the physiotherapy industry are inseparable. Liquid silicone does not contain any harmful substances and is not easy to deform. Good stability, without adding curing agent (at room temperature 25 degrees Celsius sealed without moisture, without high temperature) can be placed at least 1 years without deterioration
Other features of liquid silica gel:
1, good chemical resistance, acid, alkali and a variety of chemicals;
2, good mechanical strength, according to customer needs to deploy different strength products;
3. Excellent electrical insulation, excellent dielectric properties, excellent dielectric properties at high temperatures, and dielectric properties at high temperatures greatly exceed organic rubber;
4, excellent high temperature compression permanent deformation: good processing performance, easy molding and other advantages, through the extrusion of hot air vulcanization molding, molding, calendering molding and other methods to produce a variety of products;
5, resistance to pollution such as: coated with a ballpoint pen and other handwriting can be wiped off by hand
6. The production efficiency is high, the hygiene level is relatively high, and the product precision is generally high.
7, generally used in baby supplies and kitchen supplies and medical supplies, can be directly in contact with food and the human body. The operation process of liquid silicone is simple: the operation process of silicone injection molding is a kind of advanced operation method of liquid silicone. Only AB two kinds of liquid materials are loaded into the equipment, and the molding is fully automatic. In pursuit of simplifying the process and shortening the processing time, the processing of high-quality products can be easily realized.
The operation process of injection molding not only reduces labor, increases efficiency, but also is beautiful and incomparable to the traditional reverse mold brush mold process! Liquid silicone injection molding is widely used in electrical, electronics, automotive, food as the representative of various industries, the perfect embodiment of the excellent economic efficiency.
Injection molded liquid silicone has the advantages of high temperature resistance, corrosion resistance, insulation, soft feel, and FDA certification! Liquid silica gel has good fluidity, which is very beneficial to the injection molding operation process. The injection molding process can increase the beauty of the product, reduce the scrap rate and waste of trimming, and the machine can shorten the operation time of the process at one time!
The difference between liquid silica gel and solid silica gel: The main difference between liquid silica gel and solid silica gel is that one is liquid and the other is solid; but after processing the finished product, the two are not so easy to distinguish. Liquid silica gel and solid silica gel is not the same: from the shape of the distinction, liquid silica gel is a liquid state, with mobility; solid silica gel is solid, no mobility.
Two: from the use of the field of distinction
1, liquid silicone is generally used in baby supplies and kitchen supplies and medical supplies, can be in direct contact with food and the human body.
2, solid silica gel is generally used in daily necessities and industrial miscellaneous parts and auto parts. 3. Safety of liquid silica gel and solid silica gel: Liquid silica gel is a food-grade material with high transparency and high safety. It is molded without adding auxiliary materials such as vulcanizing agent, and is sealed and fed. Solid silica gel is a transparent material, molding need to add vulcanizing agent to speed up the vulcanization molding time, open mold feeding molding.
Three: from the molding way to distinguish
1. Liquid silicone is injection molding liquid silicone rubber (LSR): the full name is injection molding liquid silicone rubber, and the vulcanization equipment is injection molding machine. The process flow of the injection molding machine is very simple, the product accuracy is high, the output is high (A/B glue is mixed at a certain temperature for a few seconds), it saves people, saves electricity, saves materials and many other advantages, and can produce all high-temperature glue. Products; It is a mainstream in the development of silicone rubber materials in the coming years.
2, solid silicone molding is the raw material is a piece of solid, through the mixing machine mixing, cutting machine cut into products and mold appropriate size and thickness, and then put into the mold, pressure molding machine under a certain temperature molding. Demoulding is similar to that of plastic products, and it is also necessary to clean up the mold.
Four: from the finished product to distinguish liquid silica gel transparency is high, no peculiar smell, the product has a glue injection port; Solid silica gel transparent bottom, with vulcanizing agent or other cover vulcanizing agent fragrance, the product has no glue injection port.
What is the difference between liquid silicone and solid silicone molding process: The first introduction is solid silicone
1, solid silica gel in the industry is water glass (sodium silicate) as raw material, in acidic medium hydrolysis gel, and then by aging, washing, drying and other processes made of silica gel, according to the different water content, translucent or white solid. Commercially available are irregular granular, spherical and microspherical silica gels, which are commonly used as catalyst carriers in fluidized bed operations.
2. When used as a catalyst carrier, silica gel is usually impregnated in a solution containing catalytic active components, so that the solution is absorbed in the pores of silica gel, and the active components are distributed on the surface of silica gel through drying, activation and other procedures. The pore structure of silica gel has an important influence on the properties of the supported catalyst, such as the pore volume and pore size distribution of silica gel. Traditionally, silica gel with an average pore size of less than 15 ~ 20Å is called fine pore silica gel; the average pore size is greater than 40 ~ 50Å, which is called coarse pore silica gel.
3. However, the pore structure is not conducive to the diffusion of reactant molecules, but it can reduce the utilization rate of the inner surface of the catalyst, and the product molecules generated in the depths of the pores are not easy to escape from the pores, which is easy to cause deep side reactions.
Silicone can be provided in the following form:
1. Mix: This ready-to-use material can be colored and catalyzed according to your processing equipment and end use.
2. Base material: This type of silicone polymer also contains reinforcing fillers. The rubber base can be further mixed with pigments and additives to form a compound to meet your color and other manufacturing requirements.
Liquid Silicone (LSR): This two-component liquid rubber system can be pumped into appropriate injection molding equipment and then heat cured into molded rubber parts.
4, fluorine silicone mixture and base material: fluorine silicone to maintain many of the key properties of silicone, in addition, it also has superior resistance to chemicals, fuel and oil resistance.
The main chain is composed of silicon and oxygen atoms alternately, with organic groups on the silicon atoms of synthetic rubber. It has a perfect balance of mechanical and chemical properties, so it can meet the requirements of many demanding applications today. Liquid silica gel has the characteristics of high and low temperature stability, inert (tasteless and odorless), transparent, easy to color, wide hardness range, chemical resistance, weather resistance, strong sealing performance and compression deformation resistance.
The above description is about: liquid silica gel and solid silica gel process what are the different related content, liquid silica gel than solid silica gel is easier to process, due to the easy fluidity of liquid silica gel, which can be in the case of low energy consumption molding, calendering, extrusion, of course, this also reflects its high production efficiency advantages.
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Add.: No.4, New Industrial Road, Shipai Tangwei, shipai town, Dongguan City
Tel: +86-769-8665 2688
Fax: +86-796-8180 6477
Contact: Miss Li +86-136 6988 8704
Mailbox:lixiaoxia@dgminz.com.cn
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