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What are the specific applications of silicone sealing rings, and what are the characteristics and formulations of silicone sealing rings?

Release time:

2019-05-18 12:30

Source:

What are the specific applications of silicone sealing rings, and what are the characteristics and formulations of silicone sealing rings?
 
Silicone sealing ringApplication and formulation
 
Silicone sealing ring, as a material with excellent waterproof performance, is widely used in industry. Today, I 'd like to talk about the specific application of silicone sealing ring and his formula, hoping to help you.
 
Silicone sealing ring is widely used in metal plastic silicone tube sealing ring is composed of one or several parts of the ring cover, fixed in a bearing ring or gasket and then contact with another ring or gasket or form a narrow labyrinth gap, so as to prevent the leakage of lubricating oil and the invasion of foreign objects.
 
If we just look at this definition will feel a little strange, and in fact, the silicone tube seal ring in our daily life is everywhere, everywhere. If you also want to know the performance of some silicone sealing ring can click on the silicone tube sealing ring, because the silicone tube sealing ring in the working pressure and a certain temperature range, it has good sealing performance, but also with the increase of pressure can automatically improve the sealing performance;
 
Moreover, the friction between its device and moving parts must be small, and the coefficient of friction must also be stable. There is also its strong corrosion resistance, not easy to age, and its long working life and very good wear resistance, so it will automatically compensate to a certain extent after wear. Silicone tube sealing ring is also widely used in hardware and plastic, HVAC, fire fighting, water supply and drainage, ships, pharmaceuticals, piping systems, automobiles, toys, motorcycles, household appliances, electronics, all kinds of machinery, sports equipment, pneumatic components and sanitary ware and other places, life can be said to be everywhere.
 
Dongguan Mingzhen SiliconeProvide silicone sealing ring formula detection, silicone sealing ring composition analysis, performance improvement to reduce costs, shorten research and development time, product quality diagnosis. It mainly provides silicone formula detection, silicone sealing ring composition detection, rubber low temperature resistance, tear strength and oxidation resistance, solves the problem of frost spraying, frost spraying and too long vulcanization time, unknown composition detection and quality control.
 
The composition analysis process of silica gel sealing ring: after sample pretreatment, it goes through five steps of evaluation, separation and purification, instrument detection, spectrum analysis and comprehensive verification. More than 10 large and small instruments such as NMR analysis, X-ray fluorescence spectrum, IR analyzer and mass spectrometer are used in combination to obtain precise spectrum structure, formula analysis and reduction, and guide the research and development direction.
 
Microspectral analysis significance: [resin identification]: for unknown silica gel samples, the main component identification, to provide import and export related proof, high efficiency, low cost, accurate results. [formula detection]: after scientific analysis of rubber components, referring to the results of the spectrum, the plastic research and development experts reduce the composition ratio, and provide certain raw material guidance. [performance improvement]: imitate the production according to the performance of the supplied sample, or improve the formula according to the parameter performance, such as low temperature resistance, tear strength, oxidation resistance, etc. [Industrial Diagnosis]: Eliminate product quality problems caused by non-process problems, such as frost spray, frost spray, too long vulcanization time, etc., and provide a complete set of problem solutions.
 
Advantages: 1. NMR analysis, mass spectrometer, IR analyzer, mass spectrometer, X-ray fluorescence spectrum, complete instrument;
 
2. oil experienced experts sit, high accuracy of formula analysis;
 
3. with CMA certification qualification, has the most comprehensive product spectrum library, can identify almost all rubber and plastic polymers on the market. This is some of the silicone seal ring of some of the application and his formula inside the problem and solution, hope to help you in the choice of silicone seal ring on the help, famous vibration silicone products co., LTD., specializing in the production of a variety of silicone seal ring.
 
Silicone sealing ring is a kind of sealing ring. It is made of various silica gel as raw materials for fixing the ring cover, so that it can match the gap between the ring or gasket on the bearing to prevent various moisture or oil leakage. tool. At present, it is mainly used for waterproof sealing and preservation of daily necessities such as fresh-keeping boxes, electric rice cookers, water dispensers, lunch boxes, heat preservation boxes, fresh-keeping boxes, water cups, ovens, magnetized cups, coffee pots, etc. It is easy to use, safe and environmentally friendly, and is deeply loved by everyone.
 
So today, let's take a look at the silicone seal ring. Silica gel, is a highly active adsorption material, is an amorphous material, is a rubber material, its chemical formula is mSiO2 · nH2O. And insoluble in water and any solvent, non-toxic and tasteless, stable chemical properties, in addition to strong alkali, hydrofluoric acid does not react with any substance. Because of its special performance, wide temperature range and excellent chemical properties, it is a special rubber together with fluorine rubber. Therefore, silica gel is also widely used in the production of various seals to meet various sealing requirements in our mechanical production and life.
So what are the advantages of silicone sealing rings compared with other materials?
Wide range of 1. temperature resistance
1. Heat resistance: It has much better heat resistance than ordinary rubber. It can be heated at high temperature without deformation and harmful substances. It can be used almost forever at 150°C without performance change, can be used continuously for 10000 hours at 200°C, and can be used for a period of time at 350°C. Widely used in heat-resistant occasions, such as: hot water bottle sealing ring.
2, cold resistance: ordinary rubber late for -20 ℃ ~-30 ℃, and silicone rubber at -60 ℃ ~-70 ℃ still has good elasticity, some special formula of silicone rubber can also withstand very low temperature, such as: low temperature sealing ring, the lowest can reach -100 ℃.
 
Silicone rubber with good 2. insulation performance has excellent electrical insulation performance, corona resistance (the nature of resisting quality degradation) and arc resistance (the ability to resist deterioration caused by high-voltage arc) are also very good.
3. moisture absorption performance of silicone ring surface energy is low, the moisture in the environment has the function of absorption and play a role in isolation.
 
Excellent weather resistance of 4. weather resistance refers to a series of aging phenomena such as fading, discoloration, cracking, pulverization and strength decline due to the influence of external conditions such as direct sunlight, temperature changes, wind and rain, etc. Ultraviolet radiation is the main factor to promote the aging of products. The Si-O-Si bonds in silicone rubber are very stable to oxygen, ozone and ultraviolet rays, and have excellent resistance to ozone and oxide erosion. In the case of not adding any additives, it has excellent weather resistance, and even if it is used outdoors for a long time, cracks do not occur. It is generally believed that silicone rubber seals can be used outdoors for more than 20 years.
 
5. material safety and environmental protection silicone rubber has its unique physiological inertia, non-toxic, tasteless, odorless, good preservation effect, and less interference by the external environment, long-term use of yellow, do not fade.
 
6. High permeability and selectivity of gas permeability due to the molecular structure of silica gel, the silicone seal ring has good permeability and good selectivity to gas. At room temperature, the permeability of silicone rubber to air, nitrogen, oxygen, carbon dioxide and other gases is 30-50 times higher than that of natural rubber.
 
Silicone material after vulcanization molding with soft, wear-resistant, telescopic, resistant to high, low temperature and so on, so silicone products in industry and daily life has a wide range of applications, in the application process, we will encounter a variety of problems, most of the problem is in the process of product design do not understand the characteristics of silica gel, elongation and compression rate, silica gel hardness and so on, as a result, the size of the place where the silicone seal is installed cannot be grasped. Now, based on some years of experience in the production of silicone products, I would like to share with you.
 
Silicone sealing ring includes O-ring and special-shaped sealing ring. Generally speaking, O-ring is used for water leakage prevention, oil leakage prevention and gas leakage prevention. The cross section of this sealing ring is circular, easy to compress, and has a large expansion coefficient during compression. Therefore, it has good effect for water leakage prevention, oil leakage prevention and gas leakage prevention. The outer diameter of the sealing ring is the same when installing the O-ring (considering the assembly gap is not more than 0.05mm), in addition, the cross section of the O-ring is circular arc shape, which has a large extrusion space. The extrusion in the assembly process leads to the expansion of the O-ring, thus achieving the desired effect. The compression height is preferably between 0.3 mm-0 mm and 0.5mm. The design size of the special-shaped sealing ring should reserve an assembly gap of about 0.15mm, which is convenient for assembly and the compression height is also between 0.3mm and 0.5mm.
 
The assembly dimensions of the silicone gasket and the silicone gasket are somewhat different from those of the O-ring. The reason is that the surface of the silicone gasket is flat, and the compression coefficient is relatively lower than that of the O-ring. The outer diameter clearance is about 0.1mm, and the height compression cannot be higher than 0.3mm, otherwise it will bring difficulty to the assembly. The above is only a reference data, the specific situation according to the actual product material and we need silicone seal ring to play a role.

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