Introduction of natural rubber hand wheel

The elasticity of the natural rubber hand wheel and the crosslinking density is not too high, and the elasticity of the vulcanized rubber is high. For example, in the range of 0-100 DEG C, elasticres at 50-85 DEG C, the elastic modulus of steel is only 1/3000, the tensile elongation is up to 1000%, to 350%, after retraction of permanent deformation is only 15%, a higher elasticity of natural rubber, rubber in general after polybutadiene rubber hand wheel.

The strength of the natural rubber hand wheel is in the elastic material. Natural rubber raw rubber, rubber, vulcanized rubber with higher intensity. The tensile strength of the non vulcanized rubber hand wheel is called Green strength, and the Green strength of the natural rubber hand wheel is 1.4~2.5Mpa, and the appropriate Green strength is necessary for the processing of the rubber hand wheel. Natural rubber hand wheel tear strength is also higher, up to 98kN/m, its wear resistance is better. The reason of the high mechanical strength of natural rubber hand wheel is that it is self reinforcing rubber hand wheel, which can cause the macromolecular chain to form crystals in the direction of stress.

The electric property of the natural rubber hand wheel is a non polar substance. Is a kind of good insulation material. When natural rubber vulcanization after the introduction of polarity factors, such as sulfur, accelerator, so that insulation performance.

Natural rubber hand wheel is a kind of non polar material. It is soluble in nonpolar solvents and non polar oils. Natural rubber hand wheel is not resistant to cyclohexane, gasoline, benzene and other media, can not be dissolved in the medium of vulcanized rubber, vulcanized rubber hand wheel is swollen. Natural rubber is insoluble in acetone, polarity of ethanol, not soluble in water, resistant to 10% of hydrofluoric acid, 20% hydrochloric acid, 30% sulfuric acid, 50% sodium hydroxide etc..

The glass transition temperature of natural rubber raw rubber is -72 Deg. C, plastic flow temperature is 130 degrees centigrade, start decomposition temperature is 200 degrees centigrade, intense decomposition temperature of 270 DEG C. When the natural rubber hand wheel curing, its Tg increased, it will not occur sticky.

Bakelite wheel performance:

PF bakelite (bakelite, bakelite) wheel surface material light, mechanical hardness is not easy deformation, friction resistance, corrosion resistance, aging resistance, easy to clean. The handwheel bakelite insulation performance is very strong and is not affected by heat and humidity, the temperature is greater than or equal to 140 degrees / Bakelite thermal deformation handwheel, strong cold resistance can work normally in the environment of thirty degrees below zero.