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Product Description:We are offering our customers an excellent quality range of Grease Plant. Designed and manufactured under the guidance of skilled professionals as per the set industry norms using high quality raw materials.
There has been a need since ancient times for lubricating greases. The egyptians used mutton fat and to reduce axle friction in chariots as far back as 1400 BC. More complex lubricants were tried on ancient axle hubs by mixing fat and lime, but these crude lubricants were in no way equivalent to the lubricating greases of modern times. Good lubricating greases were not available until the development of petroleum-based oils in the late 1800's. Today, there are many different types of lubricating greases, but the basic structure of these greases is similar.
In general, grease consists of a thickening agent dispersed throughout lubricating oil. The thickening agents or gallants include alkali metal soaps, clays, polymers, carbon black, colloidal silica and aluminum complexes. The lubricating oil may be petroleum oil or synthetic oil. The most common type of grease is the soap-based grease. The soap comes from animal or vegetable fats or fatty acids, wool grease, rosin or petroleum acids. The lubricating oil is commonly mineral oil from paraffinic, naphthenic or aromatic hydrocarbons. Other components of these greases include unreacted fat, fatty acids and alkali, unsaponifiable matter (including glycerol and fatty alcohols), rosin or wool grease and water. Some of the other additives used in grease are oxidation inhibitors, rust and corrosion inhibitors, color stabilizers, metal passivators, water repellants and viscosity index improvers.
In soap greases the metallic soap consists of a long-chain fatty acid neutralized by a metal such as aluminum, barium, calcium, lithium, magnesium, sodium or strontium. The fatty acids usually contain 16 to 18 carbon atoms. A common form of soap-based grease uses lithium 12-hydroxystearate as the thickener. To properly thicken the grease the soap must be in the form of fibers of suitable size dispersed throughout the lubricating oil. The crystalline fibers are usually in the size range of 1-100 micrometers with diameters 0.1 to 0.01 of their length. For good shear stability the fiber should have a large ratio of length to diameter, and for good oil retention the fiber should be as small as possible. Therefore, greases need a mixture of these two types of fibers. Also, there must be a balance between the solvency of the fluid and the solubility of the soap to get suitable thickening.
Another type of thickener that is not soap-based is prepared from clays. The clay, such as bentonite or attapulgite, is reacted with a quaternary amine to change the clay from hydrophilic (water-loving) to hydrophobic (water-rejecting) and oleophilic (attracting oil). Effective thickening is achieved by combining the clay with a polar activator or dispersant, such as acetone, methanol or ethanol, with small amounts of water and by delaminating and reducing the platelets to a small size. This process will increase the total surface area of the dispersed clay, which immobilizes a very high percentage of oil based on the weight of clay. This will thicken the grease.