MANUFACTURING PROCESS OF NATURAL RUBBER

MANUFACTURING PROCESS OF NATURAL RUBBER:

FROM RUBBER TREE TO LATEX TO NATURAL RUBBER:

Natural rubber begins as latex. Latex consists of the polymer called polyisoprene suspended in water. Long-chain molecules composed of many (poly) individual units (mers) connected together form polymers. Rubber is a special form of polymer called an elastomer, meaning that the polymer molecules stretch and flex. 

The natural rubber manufacturing process begins with harvesting latex from rubber trees. Harvesting latex from rubber trees starts with scoring or cutting into the bark of the tree. Latex flows into a cup attached to the bottom of the cut in the tree. The latex material from many trees is accumulated in large tanks.
The most common method of extracting the rubber from latex uses coagulation, a process that curdles or thickens the polyisoprene into a mass. This process is accomplished by adding an acid such as formic acid to the latex. The coagulation process takes about 12 hours.
Water is squeezed out of the coagulum of rubber using a series of rollers. The resulting thin sheets, about 1/8 inch thick, are dried over wooden racks in smokehouses. The drying process generally requires several days. The resulting dark-brown rubber, now called ribbed smoke sheet, is folded into bales for shipping to the processor.
Not all rubber is smoked, however. Rubber dried using hot air rather than smoking is called an air-dried sheet. This process results in a better grade of rubber. An even higher quality rubber called pale crepe rubber requires two coagulation steps followed by air-drying.

FLOW CHART:




DETAIL MANUFACTURING VIDEO:

https://youtu.be/b5ZXIs9PBEk






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