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Natural Rubber SVR3L SVR10 SVR 20 SVR CV60

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  • Place of Origin :Thailand

Description

Natural rubber is a kind of to gather isoprene as the main component of natural high molecular compound, molecular formula is n (C5H8), a substance is 91% ~ 94% of rubber hydrocarbon (poly (isoprene), the rest for the protein, fatty acid, ash content, the rubber material such as sugar.Natural rubber is the most widely used general-purpose rubber.
Rubber obtained from natural rubber production plant.Natural rubber is mainly sold by hevea latex was prepared.

SPECIFICATION:

 

Parameter

Unit

SVR
CV50

SVR
CV60

SVR
L

SVR
3L

SVR
5

SVR
10

SVR
20

Dirt content (max)

% wt

0.02

0.02

0.02

0.03

0.05

0.08

0.16

Ash (max)

% wt

0.40

0.40

0.40

0.50

0.60

0.60

0.80

Nitrogen (max)

% wt

0.60

0.60

0.60

0.60

0.60

0.60

0.60

Volatile Matter (max)

% wt

0.80

0.80

0.80

0.80

0.80

0.80

0.80

Po

 

NA

NA

35

35

30

30

30

PRI

 

60

60

60

60

60

50

40

Mooney Viscosity
(1+4, 100 C)

ML

50
+/- 5

60
+/- 5

NA

NA

NA

NA

NA

Colour Lovibond Scale
(individual values, max)

 

NA

NA

4.0

6.0

NA

NA

NA

 

 

Natural rubber is a kind of to gather isoprene as the main component of natural high molecular compound, molecular formula is n (C5H8), a substance is 91% ~ 94% of rubber hydrocarbon (poly (isoprene), the rest for the protein, fatty acid, ash content, the rubber material such as sugar.Natural rubber is the most widely used general-purpose rubber.

Due to natural rubber with the above a series of physical and chemical properties, especially its good resilience, insulation, lie between water and plasticity and other characteristics, and, after appropriate treatment also has oil, acid, alkali resistance, heat resistance, cold resistance, compression, precious properties such as wear-resisting, so has extensive USES.Such as rain, warm water bag used in daily life, elastic;The surgeon gloves used in the medical and health industry, blood transfusion tube, condom;Use a variety of transportation tyre;Industrial use of the conveyor belt, conveyor belt, acid and alkali resistant gloves;Agricultural use of irrigation and drainage hose, ammonia bag;Measuring meteorological sounding balloon;Scientific experiments with seal, shock equipment;Defense used on planes, tanks, artillery, gas mask.Even the rocket, the artificial earth satellite and spacecraft and other advanced science and technology cannot leave the natural rubber products.At present, partially or completely made from natural rubber in the world has reached more than 70000 items.

 

Modern scientific research result has proved that the ordinary natural rubber is different diene polymerization.

(1) the chemical properties of natural rubber is unsaturated rubber, natural rubber vulcanization reaction easily with sulfiding agent (structured) reaction, bromine and oxygen, ozone oxidation, cracking reaction, chlorination with halogen, chemical reaction, the catalyst and acid effect issued by biochemical reaction, etc.
But as a result of natural rubber is a macromolecule compound, so it has the alkene response properties of organic compounds, such as slow response, incomplete reaction, uneven, and the coexistence of diverse chemical reactions with phenomena, such asoxidation decomposition and structured, etc.
In all kinds of natural rubber chemical reactions, the most important thing is that oxidative cracking reaction and structured.The former is raw rubber molding processing theory basis, folic acid, rubber aging reason;The latter is the raw rubber vulcanization processing made the theory basis of sulfide.And natural rubber chlorination, cyclization, hydrogenation reaction, such as the application of natural rubber modification.
(2) the natural rubber has excellent comprehensive physical and mechanical properties of natural rubber at room temperature have good elasticity.This is due to the natural rubber molecular chain in amorphous state at room temperature, molecular chain flexibility good sake.Its density is 0.913 g/cm, modulus of elasticity for 2-4 mpa, about one over thirty thousand of the steel, and elongation of steel 300 times, up to 1000%.Within the scope of the 0-100 degrees, natural rubber's resilience can reach more than 50% to 85%.

(3) the thermal aging of natural rubber at room temperature for high elastomer, glass transition temperature was minus 72 degrees Fahrenheit, slow softening, after heated to flow in 130-130 degrees, 200 degrees starts to break down and 270 degree intense decomposition.
(4) the medium resistance medium refers to oil, chemical liquid, etc.Natural rubber intolerance cyclohexane, gasoline, benzene and other media, insoluble in acetone, ethanol, etc., polarity does not dissolve in water, 10% of hydrofluoric acid, 20% hydrochloric acid, 30% sulfuric acid, 50% sodium hydroxide, etc.Not resistant to strong acid and strong oxidation of potassium permanganate, potassium, etc.
(5) good processing properties of natural rubber with high relative molecular mass, fairly wide molecular weight distribution, molecular chain is easy to break, coupled with raw rubber molecules exist in a certain amount of gel, so it's easier for plasticate, mixing, calendering, extrusion, molding, etc

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  • Natural Rubber SVR3L SVR10 SVR 20 SVR CV60

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Natural Rubber SVR3L SVR10 SVR 20 SVR CV60

Natural Rubber SVR3L SVR10 SVR 20 SVR CV60

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