Currently, Natural rubber is harvested mainly in the form of the latex from the Natural rubber tree or others.
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26 Facts About Natural rubber
2.
Natural rubber is used extensively in many applications and products, either alone or in combination with other materials.
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3.
Major commercial source of natural rubber latex is the Amazonian rubber tree, a member of the spurge family, Euphorbiaceae.
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4.
The term gum rubber is sometimes applied to the tree-obtained version of natural rubber in order to distinguish it from the synthetic version.
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5.
The earliest archeological evidence of the use of natural latex from the Hevea tree comes from the Olmec culture, in which rubber was first used for making balls for the Mesoamerican ballgame.
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6.
The Natural rubber trade was heavily controlled by business interests but no laws expressly prohibited the export of seeds or plants.
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7.
Tactics to enforce the Natural rubber quotas included removing the hands of victims to prove they had been killed.
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8.
Natural rubber distributed rubber seeds to many planters and developed the first technique for tapping trees for latex without causing serious harm to the tree.
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9.
Significant tonnage of Natural rubber was used as adhesives in many manufacturing industries and products, although the two most noticeable were the paper and the carpet industries.
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10.
Vulcanization of Natural rubber creates di- and polysulfide bonds between chains, which limits the degrees of freedom and results in chains that tighten more quickly for a given strain, thereby increasing the elastic force constant and making the Natural rubber harder and less extensible.
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11.
The final properties of a Natural rubber item depend not just on the polymer, but on modifiers and fillers, such as carbon black, factice, whiting and others.
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12.
The Natural rubber particle is an enzymatically active entity that contains three layers of material, the Natural rubber particle, a biomembrane and free monomeric units.
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13.
The Natural rubber precursor is isopentenyl pyrophosphate, which elongates by Mg-dependent condensation by the action of Natural rubber transferase.
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14.
Since the bulk is synthetic, which is derived from petroleum, the price of natural rubber is determined, to a large extent, by the prevailing global price of crude oil.
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15.
Natural rubber is not cultivated widely in its native continent of South America because of the South American leaf blight, and other natural predators, there.
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16.
The collected latex, "field latex", is transferred into coagulation tanks for the preparation of dry Natural rubber or transferred into air-tight containers with sieving for ammoniation.
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17.
Naturally coagulated rubber is used in the manufacture of TSR10 and TSR20 grade rubbers.
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18.
Natural rubber is often vulcanized – a process by which the rubber is heated and sulfur, peroxide, or bisphenol are added to improve resistance and elasticity and to prevent it from perishing.
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19.
Natural rubber latex is shipped from factories in Southeast Asia, South America, and West and Central Africa to destinations around the world.
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20.
Uncured Natural rubber is used for cements; for adhesive, insulating, and friction tapes; and for crepe Natural rubber used in insulating blankets and footwear.
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21.
Flexibility of Natural rubber is appealing in hoses, tires and rollers for devices ranging from domestic clothes wringers to printing presses; its elasticity makes it suitable for various kinds of shock absorbers and for specialized machinery mountings designed to reduce vibration.
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22.
The coefficient of friction of Natural rubber, which is high on dry surfaces and low on wet surfaces, leads to its use for power-transmission belting, highly flexible couplings, and for water-lubricated bearings in deep-well pumps.
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23.
Around 25 million tonnes of rubber are produced each year, of which 30 percent is natural.
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24.
The mid-range which comes from the technically specified natural rubber materials ends up largely in tires but in conveyor belts, marine products, windshield wipers, and miscellaneous goods.
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25.
Natural rubber offers good elasticity, while synthetic materials tend to offer better resistance to environmental factors such as oils, temperature, chemicals, and ultraviolet light.
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26.
Natural rubber is susceptible to degradation by a wide range of bacteria.
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