Oil resistance Buna-N rubber Seat For Wafer/ lug Butterfly Valve
Basic characteristics of nitrile rubber (NBR):
1. Due to the presence of polar nitrile groups, it has high
stability to non-polar or weakly polar mineral oils, animal and
vegetable oils, liquid fuels and solvents. Oil resistance is its
greatest specialty. The higher the propylene content, the better
the oil resistance.
2. heat resistance is better than natural rubber, styrene butadiene
rubber, neoprene, can be used in the air at 120 ° C for a long
3. good air tightness, second only to butyl rubber.
4. Cold resistance and low temperature resistance are poor, and the
higher the acrylonitrile content, the worse the cold resistance.
5. because of the non-crystalline rubber, the raw rubber strength
is low, must be blended with a reinforcing agent, improve the
amount of acrylonitrile combined to help increase strength and wear
resistance, but the elasticity is reduced.
6. The dielectric properties of nitrile rubber are inferior and
belong to semiconductor rubber.
7. The balance between oil resistance and permanent deformation of
the rubber compound, and the balance between oil resistance and
electrical properties is important.
8. the scope of application: Mainly used in the production of
oil-resistant rubber products, widely used in the manufacture of
seals, gaskets, gaskets and other molded products and extruded
products, all kinds of rubber rubber rollers, oil-resistant hoses,
industrial supplies and adhesives, etc.
1. Rubber and reinforcing material firmly bonded.
2. Rubber elasticity and excellent compression.
3. Stable seat dimensions, low torque, excellent sealing
performance, wear resistance.
4. All internationally renowned brands of the raw materials with
Related Material quick selection table:
|Summary table of rubber properties (Suzhou Meilong)|
|Rubber Name||Natural rubber||Butadiene styrene rubber||Ethylene propylene rubber||Neoprene||Chlorosulfonated polyethylene||Buna-N rubber||Polyurethane rubber||Fluororubber|
|Pure rubber performance||Proportion||0.91~0.93||0.93~0.94||0.86~0.87||1.15~1.25||1.11~1.18||1.00~1.20||1.00~1.30||1.80~1.82|
|Mooney viscosity ML1+4,100℃||90~150||30~60||45~120||45~120||30~55||30~100||25~60||65~180|
|Vulcanized rubber mechanical properties||Hardness (Shore A)||10~100||30~100||30~90||10~90||50~90||15~100||10~100||50~90|
|Tear strength kg/cm2||30~300||50~200||50~200||50~250||70~200||50~250||200~450||70~200|
|Flexural crack resistance||A||B||B||B||B||B||A||B|
|Main application||Tires, rubber shoes, hoses, tapes, miscellaneous items, etc||Same as left||Wire and cable, door and window seals, waterproof coils, etc.||Wire and cable industrial supplies shockproof rubber sealing strip
adhesive||Lining, tape, anti-corrosion seals, anti-aging coatings, etc.||Oil seals, cups, 0-rings, oil-resistant hoses, petroleum fittings,
etc.||Rubber roller, solid tire, seal, timing tape, etc.||High temperature resistant oil resistant products, oil seals,
seals, hoses, etc.|
Classification of rubber
There are many varieties of rubber, and the classification methods
are not uniform.
1) According to the source of materials, it can be divided into two
categories: Natural Rubber and Synthetic Rubber.
2) According to its performance and use, it can be divided into two
categories: Universal Rubber and Specialty Rubber Eastomer.
* Any rubber with the same or close performance as natural rubber,
good physical properties and processing properties, and can be
widely used in tires and other general rubber products is called
General rubber: natural rubber (NR), styrene butadiene rubber
(SBR), butadiene rubber (polybutadiene rubber, BR), isoprene rubber
(polyisoprene rubber, IR)
* Any special rubber product with special properties, special for
heat resistance, cold resistance, chemical corrosion resistance,
oil resistance, solvent resistance, radiation resistance, etc. is
called special rubber.
Special rubbers include: nitrile rubber (NBR), silicone rubber,
fluoro rubber, urethane rubber, polysulfide rubber, polyacrylate
rubber (UR), chloroether rubber, chlorinated polyethylene rubber
(CPE), chlorosulfonated polyethylene (CSM), butadiene rubber, etc.
In fact, there is no strict boundary between general rubber and
special rubber. For example, ethylene propylene rubber has the
above two characteristics. Between general rubber and special
rubber are: neoprene (CR), ethylene propylene rubber (EPDM), butyl