How to Distingush CR Rubber Joint and NR Rubber Joint-Product knowledge

Gongyi HuanZhong Pipeline Equipment Company is a professional manufacturer in rubber expansion joint manufacturing with more than 20-year experience. CR&NR are the most common material used in single ball rubber expansion joint producing. Differences between NR and CR are as follows:

Natural rubber (NR) mainly contains rubber hydrocarbon with a small amount of protein, water, resin acids, carbohydrates and inorganic salts, etc.. The advantages of NR are large flexibility, high elastic modulus and tear resistance and excellent electrical insulation, good abrasion resistance and drought tolerance, good adhesion,it is better than most synthetic rubber in in comprehensive performance.

CR is a kind of multi purpose elastomer with good comprehensive properties. It’s of good tensile strength, excellent physical toughness; good heat resistance, ozone resistance, weather resistant and aging resistance, especially, it’s heat resistance is better than nitrile rubber sheet; weather and aging resistance is better than EPDM rubber sheet; What’s more, CR is also of good resistance to oil and chemical corrosion and flame retardancy with 38-41oxygen index. Chloroprene rubber sheet of the oxygen index is very high, very difficult to burn.