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What are the characteristics of the sealing material of the rubber seal?

Release time:

2019-05-08 12:30

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What are the characteristics of the sealing material of the rubber seal?
The most common sealing materials of rubber hydraulic seal sealing materials are metal sealing materials, polytetrafluoroethylene, synthetic rubber, flexible graphite sealing materials, etc. Among them, synthetic rubber sealing materials include styrene butadiene rubber materials, neoprene rubber materials, silicone rubber materials, ethylene propylene rubber (EPM) materials, fluorine rubber (FPM) materials, nitrile rubber (NBR) sealing materials (materials), etc. are all synthetic rubber sealing materials.
 
Today, I would like to share what are the medium-resistant characteristics of common rubber sealing materials for rubber hydraulic seals?
Characteristics of "Polytetrafluoroethylene" 1. Rubber Hydraulic Sealing Material Silicone Rubber Encyclopedia Knowledge: Polytetrafluoroethylene-The industry also calls it the king of plastics (Polytetrafluoroethylene, abbreviated as PTFE), also known as Teflon, Teflon, Teflon, Taoflon and Deflon.
This material has the characteristics of acid and alkali resistance, resistance to various organic solvents, and is almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance, its coefficient of friction is very low, so it can be used for lubrication, but also become an ideal coating for easy cleaning of the inner layer of the water pipe.
 
The characteristics of the synthetic rubber "polytetrafluoroethylene" of the rubber hydraulic seal material: the polytetrafluoroethylene of the synthetic rubber in the rubber hydraulic seal material is almost resistant to the corrosion properties of all strong acids, strong bases and strong oxidants; Because of its very low friction coefficient, it is a kind of right anti-friction and self-lubricating rubber hydraulic sealing material, but its thermal conductivity is very poor. Bronze powder, molybdenum disulfide, graphite, etc. can be added to the polytetrafluoroethylene of the hydraulic sealing material to improve the thermal conductivity and self-lubricating performance of the sealing material. In addition, it has high heat resistance (high temperature resistance) and cold resistance (low temperature resistance), and the operating temperature range is -180 degrees Celsius to 250 degrees Celsius. Good water resistance, good aging resistance, non-flammability, toughness and processing performance are very good. Rubber hydraulic seal sealing PTFE most commonly made of V-ring (V-ring) or O-ring (O-ring). In addition, other sealing materials can be coated with polytetrafluoroethylene, such as polyethylene tetraethylene coated stainless steel, polytetrafluoroethylene coated rubber hydraulic seals, and the composite sealing materials formed are hydraulic seals or rubber seals, due to their combination The advantages of two or more sealing materials! More has a better sealing effect.
 
2. Rubber Seals Sealing Material "Silicone Rubber" Medium Resistance Characteristics Silicone Rubber Encyclopedia Knowledge: Silicone rubber refers to rubber whose main chain is alternately composed of silicon and oxygen atoms, and two organic groups are usually connected to the silicon atoms. Ordinary silicone rubber is mainly composed of methyl and a small amount of vinyl containing silicon oxygen chain. The introduction of phenyl can improve the high and low temperature resistance of silicone rubber, and the introduction of trifluoropropyl and cyano can improve the temperature resistance and oil resistance of silicone rubber. The medium and characteristics of the synthetic rubber "silicone rubber" of the rubber seal material: the silicone rubber of the synthetic rubber in the rubber seal material has the ability to resist high and low temperatures with a large temperature difference. research shows that the lowest (resistant) temperature of the silicone rubber of the rubber seal material can be -100 degrees celsius, the highest (resistant) temperature can be as high as 350 degrees celsius, and the stability (temperature resistance, heat resistance) performance is quite good, which may be the limit of the silicone rubber!

The biggest characteristic of rubber sealing silicone rubber is non-toxic and tasteless. The most important thing is that there is no adverse reaction to human body. The only thing is that the solvent resistance is poor. It is easy to have ionic cracking under the action of acid and alkali, and it will produce decomposition reaction in high pressure water vapor. Silicone rubber can be mainly used for high temperature resistance, low temperature resistance, high-speed rotation and other occasions (environment) under the dynamic plant oil, mineral oil, oxygen, weak alkali, weak acid and other medium conditions.
The most not suitable for the use of benzene, toluene, acetone and other solvent performance of the medium conditions, but not suitable for high-pressure steam, because the rubber sealing silicone rubber also produces decomposition.

Dielectric characteristics of "ethylene-propylene rubber" 3. hydraulic auxiliary seal material Dielectric characteristics of "ethylene-propylene rubber" synthetic rubber of hydraulic seal material: ethylene-propylene rubber is a synthetic rubber with ethylene and propylene as main monomers (ethylene propylene rubber-EPR). According to the different monomer composition in the molecular chain, it can be divided into binary ethylene-propylene rubber and EPDM rubber. The former is a copolymer of ethylene and propylene, expressed by EPM, the latter is a copolymer of ethylene, propylene and a small amount of a non-conjugated diene third monomer, expressed as EPDM. The two are collectively referred to as ethylene propylene rubber,.
Widely used in automotive parts, building waterproof materials, wire and cable sheath, heat-resistant hose, tape, automotive seals, lubricating oil additives and other products. The ethylene-propylene rubber of the synthetic rubber in the hydraulic seal material has very excellent aging resistance and heat resistance. Such sealing materials can be used for a long time in high temperature occasions below 150 degrees Celsius, and the physical and mechanical properties change slowly.
Wear resistance, corrosion resistance is good, but for hydrocarbon oil stability is poor, because the resistance can not be used in mineral oil. If the rubber seal is installed with the help of grease and lubricating oil, the influence of this factor must also be considered. But it is particularly resistant to silicone oil, phosphate ester hydraulic oil and other synthetic lubricants, resistant to ketone, drunk solution, medium strength acid and alkali, but also resistant to high pressure steam.

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What is the difference between silicone plug and rubber plug

Silicone plug and rubber plug which one effect is good? Then today we will popularize their difference to where the end point is. First of all, rubber plug products, as a common type of industrial products and accessories, or have strong advantages, such as dust and water resistance, wear resistance, tear resistance, aging resistance, oil seal resistance and ozone radiation resistance, etc., while rubber materials are divided into various types, and the side materials over there can be made of dozens of compound materials, so different attribute functions can be deployed for different needs, as for some industries such as mechanical tight closure, electronic tight closure, vehicle construction and even aerospace and military industry, rubber blocking is the most suitable. Silicone rubber plug and rubber plug have one thing in common. They can be molded in the molding vulcanizer of silicone product manufacturers. The difference is that they are more environmentally friendly, have good high and low temperature resistance, feel better when touching by color hands, and can be in contact with human body skin for a long time. Therefore, silicone plugs for earphones and medical grade silicone plugs are widely used even in food silicone appliances, mainly or because of the material in particular the nature of the achievements of its scope of application. Silicone plug is different. Its material is mainly based on environmental protection advantages, material texture and comfortable application. Therefore, it is used in some electronic products, survival products and small-scale waterproof and dustproof household appliances. Its raw materials are mixed by precipitation method silica gel, high-fine molecular silicone gum and white carbon black. The molecular chain of the product is called heart, soft and comfortable to use! Compared with the materials of silica gel and rubber, they can be compared as follows: new technologies are used in traditional industries. Rubber materials have been heard for a long time in early years, so the comparison of rubber materials accounts for the majority. Up to now, more and more silicone rubber products have been reused because they can replace larger usage compared with rubber, namely environmental protection performance and various technologies, such as shape, pattern and color, etc. www.mingzhen2006.com

What are the fields of application of silicone keys for equipment

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The convenience of the use of industrial silicone buttons

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What are the molding techniques of rubber products?

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How to print the pattern on the transparent key

Some laser marking machines have played opaque keys. While using laser typing to knock out the paint, they will also burn the plastic parts that can transmit light, but cannot transmit light! Changzhou laser marking machine has a special device, which can adjust the machine to the function of laser processing light-transmitting key. The laser can clean the paint sprayed on the surface very clean without burning light-transmitting plastic, thus realizing light-transmitting key laser processing! YAG laser marking machine, the general laser marking machine can not do through the key! Light transmission keys, also called light transmission buttons, are widely used in electronic products. In dark environments, they can accurately and accurately find each button. The light transmission keys include a light transmission key body, an electronic switch located below the key body, and a luminous body. The luminous body is arranged on the lower side of the key body. A light guide body is arranged below the key body, and the light guide body has a body, the upper side of the body extends an extension to the position where the electronic switch is located, the outer surface of the extension is a first reflective slope, the lower surface of the body is a second reflective slope and doubles as a light touch surface that can be contacted with the electronic switch, and a light input part connected with the extension part and arranged corresponding to the light emitting body, the light emitting body emits light, the light is emitted to the first reflective slope through the introduction portion, and is reflected by the first reflective slope into the body, and the light entering the body is reflected by the second reflective slope out of the key body. The structure makes the light emitted from the light emitting surface of the key body more uniform, the key is more beautiful, and the user can accurately find the corresponding function key. The pattern and text on the keys are processed by laser typing! In our life, there are many keys and buttons that use laser typing and can transmit light, such as mobile phone keys, car audio keys, computer keys, and various electronic and electrical keys! www.mingzhen2006.com