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Rubber raw materials are seldom made only from macromolecules. They are complex systems containing many constituents that may include two or more elastomers, together with various additives playing different roles. This is done to achieve the desired performance, characterized by several mechanical, thermal, optical, electrical, and chemical properties. Examples of rubber raw materials include Neoprene, Nitrile, Silicone, EPDM and Viton. Different kinds of rubber raw materials have advantages, disadvantages, strengths and weaknesses that may make them more suited for certain situations. Browse through this category for various rubber raw materials available in Zambian stores.
Natural rubber is a polymer of isoprene (also known as 2-methylbuta-1,3-diene) with the chemical formula (C5H8)n. To put it more simply, it's made of many thousands of basic C5H8 units (the monomer of isoprene) loosely joined to make long, tangled chains.
When tappers peel back the bark of a rubber tree, they disrupt the plant ducts. This releases latex, a milky white substance. From there, the latex flows down the grooves and into large cups, where they are collected by rubber tappers and sent on their way to be processed into rubber as we know it.
Hevea brasiliensis (Rubber Tree) - The rubber tree will grow to be 100 to 130 feet in height, and live to be 100 years old. Its white sap, which is latex, flows from the tree when bark is removed. A rubber tree can be tapped for latex when it is six years of age.
Technically speaking, rubber is a natural polymer of Isoprene (usually cis-1,4-polyisoprene). It is hydrocarbon polymer occurring as milky latex in the sap of various plants and can also be made synthetically.
Crude oil is the principal raw material in synthetic rubber. Approximately 70% of all rubber used today is synthetic. Nowadays, 99% of the natural rubber we use is extracted from a tree called Hevea brasiliensis.
Plastic is a synthetic polymer whereas rubber is found as a natural polymer. This is the main difference between plastic and rubber. Both these compounds are very useful in the production of different items.
Rubber processing consists of four basic steps: mastication, when the elastomer is sheared and the molecules are broken down to give easier flow, mixing, usually carried out immediately after mastication, when additives are incorporated, shaping of the viscous mass, for example, by extrusion or moulding,
The Para rubber tree (Hevea brasiliensis) is an economically important tropical tree species that produces natural rubber, an essential industrial raw material.
Some of the most common rubber manufacturing processes are extrusion, latex dipping, molding, and calendering. Extrusion begins with an unvulcanized compound being fed into an extruder. Once it's inside the extruder, it gets carried forward to a dye, which is a specialized manufacturing tool used to shape the rubber
The two main categories of rubber are natural rubber and synthetic rubbers. Silicone rubber is often considered to be a third category. Today, there are many types of rubber, each of which is ideal for different applications
Types of rubber