Contact Haisheng Rubber ProductsService Hotline: 400-0590-280
- Phone: 0574-63405708
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- Address of Company: Changhe Town Industrial Park, Cixi City, Zhejiang Province
Different products have different working conditions, and the requirements for rubber seals are different. Many products have certain requirements for temperature. Among them, cold resistance is a more common operating condition. Today Haisheng Rubber takes everyone to understand how to strengthen rubber seals. Cold resistance of the circle. 1. The cold resistance of rubber seal ring mainly depends on the material of rubber. The selection of raw materials with good cold resistance is the key to cold resistance. 2. The combination of rubber is a common method for adjusting cold resistance in the design of rubber formulas. For example, SBR combined with BR, NBR combined with NR, CO, and ECO can improve the cold resistance of rubber seals. 3. Select an appropriate and effective vulcanization system. The glass transition temperature of rubber is 7 ° C lower than that of traditional vulcanization systems. Therefore, NR and SBR, DCP have the most vulcanization.
- 20-02 18 20-02
Tensile performance is a series of tests to determine the characteristics of rubber O-rings under tensile load, also known as tensile test. It is one of the basic methods for testing mechanical properties of materials. It is mainly used to check whether materials meet the prescribed standards and study the properties of materials. Test equipment (1) This test is performed on a tensile machine. The tensile machine shall comply with the relevant provisions of GB / T 528-1998 "Determination of tensile stress and strain properties of vulcanized rubber or thermoplastic rubber". The tensile machine needs a guide rack device and a device for measuring the elongation of the sample. (2) The test fixture is composed of upper and lower shaft wheels with ball bearings with a diameter of at least 12mm. When the two wheels are close to each other, the new one The distance is within 25mm. The lower fixture is equipped with a gear transmission, which should be engaged with the guide rack on the tensile machine during the test (3) Linear test
- 20-02 18 20-02
Tensile performance is a series of tests to determine the characteristics of rubber O-rings under tensile load, also known as tensile test. It is one of the basic methods for testing mechanical properties of materials. It is mainly used to check whether materials meet the prescribed standards and study the properties of materials.
- 20-02 17 20-02
Rubber is subdivided into many materials. Among them, nitrile rubber NBR, silicone rubber PMQ / VMQ, ethylene-propylene rubber EPDM, and fluoro rubber FKM are common materials in rubber seals, so what are their respective media resistance? Next Haisheng Rubber will introduce to you. 1. Nitrile rubber NBR: suitable for petroleum products, air with oil vapor, vegetable oil and mineral oil, but not for phosphate ester series hydraulic oil and gear oil containing extreme pressure additives. The operating temperature is -40-120 ° C. 2. PMQ / VMQ silicone rubber sealing ring: suitable for drinking water, hot water, oil-free air and high-temperature steam, but not for petroleum media, the use temperature is -60-230 ℃. 3. EPDM ethylene-propylene rubber seal ring: suitable for hot water, dilute acid, oil-free air and many chemicals,
- 20-01 16 20-01
Currently nitrile rubber is one of the more commonly used seals for O-rings, but many people don't know much about its properties. This article takes everyone to understand some of the main properties of nitrile rubber O-rings. Nitrile rubber, referred to as NBR, is mainly produced by low-temperature emulsion polymerization. It is a synthetic rubber made by copolymerizing butadiene and acrylonitrile. Nitrile rubber is used, which has higher abrasion resistance, better heat resistance and strong adhesion. Its disadvantages are poor low temperature resistance, poor ozone resistance, poor insulation performance and slightly lower elasticity. There are five kinds of acrylonitrile content (%) in the nitrile rubber: 42-46, 36-41, 31-35, 25-30, and 18-24. The more acrylonitrile content,
- 19-12 21 19-12
O-rings are widely used in various mechanical equipment seals. They provide a seal under static or moving conditions at specified temperatures, pressures, and different liquid and gaseous media. They also have high and low temperature resistance. Haisheng Rubber tells you to control the temperature range, maintain good sealing elasticity, and resistance to ozone, weathering and other advantages when using rubber seals. Secondly, the silicone sealing ring in the rubber sealing ring material has many excellent characteristics such as non-toxic and odorless, waterproof, flame retardant, high temperature resistance, wear resistance and oil resistance. It can be used for making thermal insulation, insulation products and medical silicone products. Pieces. So, what are the factors that cause the aging of O-type rubber seals?
- 19-12 20 19-12
Haisheng rubber takes you to know the points to pay attention to when selecting the seal ring material
The function of the seal ring is mainly to seal. There are many mediums to seal, mainly oil. It plays the role of dust and oil isolation in the application. The performance of the seal ring directly affects the performance of other equipment. Good or bad, and the material that determines the performance of the seal ring is first of all. So how to choose the material of the seal ring? What factors are related to it, today Haisheng Rubber will give you a detailed introduction. 1. Mechanical movement speed. The adaptability of the material of the seal to the speed of the machine is different. Some common materials cannot adapt to high-speed mechanical operation. Therefore, when selecting the material of the seal, choose a high-end one so that high-speed operation can be used. . 2. Stress. The material of the seal ring is also very sensitive to the pressure of the work. Different materials, the pressure they can withstand
- 19-12 19 19-12
During the production process, it will be found that the silicone products are brittle and very easy to break, which seriously affects the production, and the brittle silicone products do not meet the requirements in terms of service life. So, what are the reasons for the brittleness of silicone products? First, the structure or mold design of silicone products causes the product to easily break. The product structure or mold design is unreasonable, which will cause the silicone product to be easily broken during molding. Solution: Modify the structure of the product or mold to improve, for example, slightly thicken the excessively thin areas, and round the corners slightly . Second, the molding temperature is too high or the vulcanization time is too long, resulting in brittle silicone products. Solution: reduce the temperature to control the curing time. 3. Poor ventilation or high temperature caused by secondary sulfur addition results in brittle silicone products. Solution: pay attention to adjusting the ventilation and control of secondary sulfurization
- 19-12 18 19-12
The seal without relative displacement of the two sealing surfaces during operation is a static seal. The sealing of the head and barrel of the pressure vessel, the seal of the reducer case and the cover, and the seal of the cylinder and cylinder head of the internal combustion engine are all static seals. 1. O-ring seal O-ring seal has a long life, compact structure, easy assembly and disassembly, and good sealing performance. Depending on the material, it can be used in the temperature range of -100 ℃ ~ 260 ℃ and its pressure of 100MPa. If you want to work under higher or lower temperature and pressure conditions, you need to choose the material to make it and use a metal hollow O-ring seal. He can work under 280MPa pressure and the temperature range is -250 ℃ ~ 650 ℃. 2. Gasket seal Gasket seal is the most commonly used form of static sealing. A gasket of different materials is placed between the sealing surfaces of the two connectors.
- 19-12 17 19-12
With the continuous development and progress of the social age, O-rings and gaskets in today's society are widely used in industry and life, but what kind of tightness may we tangled in the end? Haisheng Rubber takes everyone to understand their similarities and differences. O-rings are the same as gaskets: both meet this implicit condition: when the sealing contact pressure is greater than the pressure of the sealed medium, the sealing effect is maintained; when the sealing contact pressure is less than the pressure of the sealed medium, the gasket or O-shape The ring was ejected, and the medium leaked a lot. O-rings differ from gaskets: flat gasket seals consist of gaskets, flanges and bolts, forming a complex statically indeterminate system; seal contact pressure is provided by the deformation of the bolts. The contact pressure distribution when the flat gasket is working is uniform. When the medium pressure fluctuates, and the contact pressure is greater than the contact pressure, the leakage may occur.
- 19-12 16 19-12
Advantages of fluorine rubber seals: 1. The seals should have outstanding sealing function under the operating pressure and a certain temperature range, and the sealing function can be actively improved with the addition of pressure. 2. The friction between the seal equipment and the moving parts should be small, and the friction coefficient should be stable. 3. The sealing ring has strong anti-corrosion ability, not easy to age, long working life, good abrasion resistance, and can actively compensate to a certain extent after wear. 4. The structure of the fluorine rubber seal ring is simple, the use and protection of the fluorine rubber are convenient, and the fluorine rubber seal ring has good corrosion resistance, so that the seal ring has a longer life. Fluorinated rubber is a synthetic rubber rich in fluorine atoms. Fluorinated rubber has excellent functions of high temperature resistance, oil resistance and corrosion resistance to various chemicals. It is an indispensable data element for top science and technology such as aviation, sailing, aerospace, and world flight.
- 19-09 20 19-09
When the perfluoro O-ring is installed, in order to reduce the wear and tear of the perfluoro O-ring, we can use grease and other methods to reduce wear and tear, and pay attention to the tensile strength during installation. Anti-deformation, etc. So, what should we pay attention to when installing perfluoro O-rings? (1) Lubrication Elastomer seal installation can reduce wear and seizure by using grease. Generally, a thin lubricating film is necessary for the installation of O-rings, because perfluoro seals are used in harsh conditions, and the lubricating oil can improve the ability of the seals to withstand high temperature carbonization and cracking. In most cases, the sealed medium is used as a lubricant, fluorinated oil, such as Krytox or powdered graphite can also be used as a lubricant. Even if lubricant is used, the seal has been installed.
- 19-09 20 19-09
Fluoro rubber seals-Function: (1) Fluoro rubber seals impart elasticity and resilience; (2) Appropriate mechanical strength, including expanded strength, elongation and tear resistance. (3) The fluorine rubber sealing ring is stable in function, difficult to swell in the medium, and has a small heat shrinkage effect (Joule effect). (4) The fluorine rubber sealing ring is easy to be formed, and can adhere to the fine scale. (5) The fluorine rubber seal ring does not corrode the contact surface and does not pollute the medium. Fluoro rubber sealing ring-advantages: 1. The sealing ring should have outstanding sealing function under the operating pressure and a certain temperature range, and it can actively improve the sealing function with the addition of pressure. 2. The friction between the seal equipment and the moving parts should be small, and the friction coefficient should be stable. 3. The seal ring has strong anti-corrosion ability, not easy to age, long operating life, good wear resistance,
- 19-08 03 19-08
Why does the seal leak or not seal during use? What should we do if we encounter these pressure relief problems? Haisheng Rubber will take you to analyze it. 1. Manufacturing and assembly factors: All hydraulic components and sealing components have strict dimensional tolerances, surface treatment, surface finish, and shape and position tolerances. If the tolerance is exceeded during the manufacturing process, such as: the piston radius of the cylinder, the depth or width of the seal groove, the tolerance of the hole size of the seal ring, or out-of-roundness due to processing problems, etc., the part itself has a congenital leakage point. Leaks occur after assembly or during use. 2. Assembly factors: The hydraulic components should be prevented from being subjected to brutal operation during assembly. If excessive force is applied, the parts will be deformed, especially the cylinder body and the sealing flange are beaten with copper rods, etc. The parts should be carefully inspected before assembly. Will part
- 19-08 03 19-08
There are many advantages of silicone gaskets. The first is that its heat resistance can work in a very low temperature environment, which can reach minus 100 degrees, and has good resistance to oxidation and ozone in the air. The structure makes the silicone sealing ring have good air permeability and good gas selectivity. Because it is non-toxic and tasteless, it is used in many food and medical industries. Outstanding insulation performance is another advantage, but if carbon black, nickel powder, aluminum powder, etc. are appropriately added to the material, it can increase its conductivity. Silicone sealing ring also has hygroscopic performance, which has the function of absorbing and isolating the moisture in the environment, but has poor resistance to water vapor. Said so many advantages of silicone seals. But silicone is not a panacea. Its disadvantages are also more obvious
- 19-08 03 19-08
In life, many people must have seen that rubber products will turn white after a period of use. For example, under high humidity conditions, paints tend to turn white. Oil injection is a liquid compounding agent such as softener, tackifier, lubricant, plasticizer, etc., which is separated on the rubber surface to form a layer of oil. In practice, the appearance of frost on the rubber surface is sometimes presented in one way, but sometimes it is presented in two or three ways together. (1) Inappropriate formula planning: Full spray: common in sulfur, accelerator, active agent, and antioxidant. Relocation spray: common in processing aids, relocating antioxidants. Antistatic agent generation and ejection: common in accelerators of sulfur vulcanization systems and the use of reaction products to stay in reaction: common in organic peroxide vulcanization systems, low molecular weight excessive stress ejection: common in inorganic fillers
- 19-08 03 19-08
The sealing ring has excellent sealing performance and high working life. The working life of dynamic pressure sealing is 5-10 times higher than conventional rubber sealing products, and it can reach tens of times. Under certain conditions, it can have the same life as the sealing base. The friction resistance of the seal ring is small, and the dynamic and static friction forces are equal. It is 1 / 2-1 / 4 of the friction force of the "0" rubber ring, which can eliminate the "crawl" phenomenon of low-speed and low-pressure movement. The seal ring is highly abrasion-resistant and has automatic elastic compensation function when the sealing surface is worn. Good self-lubricating performance of the seal ring. Can be used as oil-free lubrication seal. The sealing ring structure is simple and easy to install. Sealing ring working pressure: 0-300MPa; working speed: ≤15m / s; working temperature: -55 & mdash
- 19-08 03 19-08
Do you know the factors to consider when choosing an O-ring? The following Haisheng Rubber will give you a brief introduction, hoping to help everyone. When choosing O-ring specifications, you must first determine the material of the O-ring. Currently in industrial parts, the materials of O-rings are NBR nitrile rubber, NR natural rubber, CR neoprene rubber, EPDM EPDM rubber, HNBR hydrogenated nitrile rubber, SILICOME silicone, FKM, VITON, fluorine rubber, FLS silicone fluorine rubber, PU polyurethane, SBR styrene butadiene rubber, Buna butadiene rubber, acrylic rubber ACM, PTFE, polytetrafluoroethylene and so on. Each of the above materials has its own purpose and purpose, including oil resistance, chemical resistance, high and low temperature resistance, wear resistance, and so on. So when choosing O-ring specifications
- 19-08 03 19-08
Fluorosilicone rubber O-ring O-shaped seal Because the main chain is a semi-inorganic silicone structure, it maintains the excellent properties of silicone materials such as heat resistance, cold resistance, high voltage resistance, weather resistance, etc. With the introduction of fluorine-containing groups, the fluorosilicone rubber ○ -ring ○ -shaped seal has excellent hydrogen-resistant solvents, oil resistance, acid and alkali resistance, and lower surface energy performance of organic fluorine materials. Fluorosilicone O-rings can be widely used in aerospace, aviation, automotive, power, electronics, textiles, machinery and construction. Let ’s take the example of fear of aerospace and automotive. 1. Aerospace industry In the aerospace industry, in the aircraft manufacturing industry, it is mainly used in the aviation industry to manufacture various seal products (seals / contacts) that are resistant to fuel oil, lubricants, hydraulic oils, solvents, etc. Such as various types of dynamic and static ○ ring
- 19-08 03 19-08
The rubber waterproof sealing ring plays a waterproof role, because the waterproof ring is made of rubber elastomer material, so the full name is also called rubber waterproof ring. The size, material, hardness, tolerance and other parameters of the waterproof ring must be provided when purchasing the waterproof ring. The burr of the clamping line must not exceed 0.05MM (the minimum tolerance of Haisheng Rubber can be 0.01mm) during the appearance inspection. To its own effect. The waterproof ring can be divided into silicone waterproof ring, silicone rubber waterproof ring, watch waterproof ring, conductive waterproof ring, thermal conductive waterproof ring, LED waterproof ring according to different uses and materials. The rubber seal is used to seal the required finished product to prevent oil leakage, liquid leakage, etc., and it is also dustproof. Rubber seals are widely used in mechanical equipment, electronic and electrical products. They are an indispensable rubber seal accessory, which protects
- 19-07 19 19-07