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Sealing rubber ring summary

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• Sealing rubber ring summary

  
  

  Polyurethane rubber UR PU  polyurethane rubber   

  
  

  Advantages:  Good mechanical properties  High hardness High elasticity  High abrasion resistance  High pressure resistance aging resistance  Ozone resistance  Good oil resistance General temperature range:  -45---90 Disadvantages: Not high pressure and high temperature resistance   : Hydraulic cylinder seals.  

  
  

  Acrylic rubber ACM polyacrylate rubber  

  
  

  Advantages: petrochemical oil resistance, high temperature resistance, good weather resistance   Good oxidation resistance,  Bending deformation resistance, excellent resistance to oil. General use temperature range: -25---170  Disadvantages: Not suitable for hot water, brake oil, phosphate ester, not low temperature resistance. The mechanical strength, compression deformation rate and water resistance are weaker than the general oil resistance.   Commonly used:  In automobile transmission oil, automobile transmission system and power steering wheel, and power system seals.  

  
  

   Viton  FPM   fluororubber  fluoro carbon rubber   Viton  

  
  

  Advantages: high temperature resistance> silicone rubber       excellent chemical resistance     resistance to most oils and solvents (except ketone   fat  ) weather resistance     ozone resistance,   general use temperature   -20-250     special formula can be resistant to low temperature -40     acid and alkali resistance Disadvantages: It is not recommended to use ketones, low molecular weight lipids and mixtures containing nitrate. Poor cold resistance   Commonly used: diesel engine of automobile and locomotive fuel system and seal of chemical plant  

  
  

  Perfluoroelastomer FFKM   or FFPM  Perfluoroelastomer  

  
  

  Advantages: Best heat resistance  Excellent chemical resistance Low outgassing properties  Excellent plasma resistance Strong corrosion resistance Super cleanliness  Disadvantages: Poor low temperature resistance  High raw material price  High difficulty in production  Including semiconductor industry and application scope In the film process, PVC polyvinyl chloride CVD chemical vapor deposition, etching process and various high vacuum sealing processes.  

  
  

  Silicone rubber SI silicone rubber 

  
  

  Advantages: Excellent heat resistance cold resistance ozone resistance weather aging resistance good insulation. After modulation, the tensile strength is 1500psi  and the tear resistance is 88lbs. Good elasticity and good compression distortion. Good resistance to neutral solvents. Heat insulation. Excellent heat dissipation. General temperature      Disadvantages: It is not recommended to use most concentrated solvent oil   concentrated acid    and diluted sodium hydroxide. Commonly used: household appliances sealing  electric kettle  electric iron  in microwave oven electronic industry : mobile phone button dvd inner shock-absorbing pad  sealing in cable connector  format products in contact with people: kettle water dispenser   

  
  

  Silicone Fluorine Rubber  FPM (fluorinateds silicone rubber) 

  
  

  Advantages:   has the advantages of fluorine and silicon     oil resistance     solvent resistance   fuel oil resistance and high and low temperature resistance are good, used for special purposes, such as the need to be able to resist the corrosion of chemicals, aromatic hydrogen-containing solvents and chlorine-containing solvents. The general use temperature is: -50---200  Disadvantages: It is not recommended to be exposed to the brake fluid, ketones and the solution of acetone. Commonly used:  Space parts   

  
  

  Chlorosulfonated polyethylene rubber  CSM  (Hypalon Polythylene) DuPont  Synthetic rubber 

  
  

  Advantages: heat resistance, weather resistance, ozone resistance are good, cold resistance     good acid resistance, often used in oxidizing chemicals, has good resistance to ozone, oxidation and flame. The physical properties are similar to neoprene rubber, but it has better acid resistance  excellent abrasion resistance  has the same low friction surface as nitrile rubber   oil resistance flame resistance electrical insulation resistance  The resistance to oils and solvents is between nitrile rubber and chlorine Between butyl rubber   It is recommended to use water to prevent leakage.  General use temperature: -45---120  Disadvantages: It is not recommended to expose to concentrated oxidizing acid, nitrohydrogen, lipids, ketones and fragrance hydrogen.  

  
  

   Neoprene  CR  (Neoprene Polychloropene)  is polymerized by chloroprene monomer. 

  
  

  Advantages: After vulcanization, the rubber has good elasticity and abrasion resistance. It is not afraid of direct sunlight. It has particularly good resistance to atmospheric aging, not afraid of intense distortion, not afraid of refrigerants such as dichlorodifluoromethane and ammonia, and is resistant to dilution and silicone grease. Lubricating oil, good elasticity and good compression deformation. The formula does not contain sulfur, so it is very easy to make. It is resistant to animal and vegetable oils. It will not affect the physical properties due to neutral chemicals, fats, greases, various oils, and solvents. It has flame-retardant properties. General use temperature  -50---150  Disadvantages: Not resistant to phosphate hydraulic oil. It is easy to crystallize and harden at low temperatures, and has poor stability. It has a large expansion in mineral oil with low aniline point. It is not recommended to use chemical species such as strong acids, nitro hydrocarbons, lipids, chloroform and ketones.   Commonly used: seals resistant to R12 refrigerant  rubber parts or seals on household appliances, suitable for making all kinds of direct contact with the atmosphere and sunlight. Parts of ozone. Suitable for all kinds of flame-resistant, chemical-resistant rubber products  

  
  

  Nitrile rubber  NBR  Nitrile Rubber 

  
  

  It is made by copolymerization of acrylonitrile and butadiene. The acrylonitrile content is 18%-50%. The higher the acrylonitrile content, the better the resistance to petrochemical hydrocarbon fuel oil, but the low temperature performance will be worse. Normal temperature ：-25---100  Nitrile rubber is one of the most commonly used rubbers for oil seals and O-rings. 

  
  

  Advantages: Good oil resistance, water resistance, solvent resistance and high pressure oil resistance. Good compression   anti-wear   elongation   Disadvantages: not suitable for use in polar solvents, such as ketones   ozone   nitro hydrocarbons   low temperature resistance   poor ozone resistance   Commonly used: fuel tanks, lubrication mailboxes, petroleum hydraulic oil, gasoline , Water, silicone grease, silicone oil, two grease series lubricants. Rubber parts used in fluid media such as glycol hydraulic oil, especially sealing parts. It can be said that it is currently the most widely used and lowest cost rubber seal.  

  
  

  Hydrogenated nitrile rubber HNBR Hydrogenated Nitrile 

  
  

  After hydrogenation of butyronitrile to remove the double strands, the temperature resistance  weather resistance   is much higher than that of butyronitrile, and the oil resistance is similar to that of general fixation. General temperature: -25---150 

  
  

  Advantages: better abrasion resistance than nitrile, excellent corrosion resistance, tensile strength, tear resistance, compression distortion, and good resistance to ozone, sunlight and other atmospheric conditions.  Disadvantages: It is not recommended to be suitable for alcohols  lipids aromatics solutions    Commonly used: air-conditioning refrigeration industry, widely used in environmental refrigerant R134a system seals  car engine system seals washing and dishwashing detergent   

  
  

  Ethylene propylene rubber  EPDM  (Ethylene propylene rubber) 

  
  

  The main chain is not double-stranded by copolymerization of ethylene and propylene, so it has excellent heat resistance, aging resistance, ozone resistance, and stability, but it cannot be sulfurized. In order to solve this problem, a small amount of double-stranded third component is introduced into the EP main chain and can be sulfurized to prepare EPDM.  General use temperature range  -50---150. For polar solvents such as alcohol  ketone  ethylene glycol Phosphate ester hydraulic oil has excellent resistance. 

  
  

  Advantages: Good weather resistance and ozone resistance  Excellent water resistance and chemical resistance    Alcohols and ketones can be used  High temperature steam resistance  has good gas impermeability. High corrosion resistance High insulation           Alkali resistance  Disadvantages: not recommended for video use   or exposed to aromatic hydrocarbons  not oil-resistant  not acid-resistant         Sealing parts in high-temperature water and steam environment   ) Rubber parts  

  
  

  Butyl rubber  IIR  Butyl Rubber 

  
  

  Isobutylene is polymerized in a small amount of isoprenes  Retains a small amount of unsaturated groups for sulfurization, due to the steric barrier of methyl groups   Advantages: less gas permeability  General gas impermeability High resistance to heat, sunlight, and ozone Good electrical insulation  Acute solution  Alcohol The resistance of ketone lipids is high. It can be exposed to animal and vegetable oils or oxidizable chemicals. The general use temperature is   -54---110  Disadvantages: It is not recommended to use petroleum solvents, kerosene, and aromatic hydrogen at the same time.  Mostly used to make rubber parts that are resistant to chemicals  Vacuum equipment    Inner tubes of automobiles and airplanes  

  
  

  SBR SBR  Styrene Butadiene Copolyme  

  
  

  The copolymer of butadiene and styrene, compared with natural rubber, has uniform quality and less foreign matter, but its mechanical strength is weaker. It can be blended with natural rubber. Advantages: uniform quality and less foreign matter. Low cost, non-oil resistant Material  Good water resistance  Hardness below 70 has good elasticity Can use most neutral chemicals and dry  moisturizing organic ketones Heat resistance Abrasion resistance and aging resistance are better than natural Disadvantages: non-oil-resistant material  Mechanical strength is better Weak   poor compression distortion at high hardness   strong acid   ozone   oil   grease   fat   and most of the hydrocarbons   commonly used:   tire industry     shoe industry       cloth industry     conveyor belt industry. Tape  Hose  Wire and cable Medical   

  
  

  Natural Rubber NR Natural Rubber 

  
  

  Made from rubber tree latex,  isoprene polymer  Advantages:   Very good abrasion resistance     Very high elasticity   Breaking strength and elongation   Disadvantages:   Easy to age in the air   Sticky when heated   In mineral oil or gasoline Easy to swell and dissolve, alkali resistant but not acid resistant.

  
  

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