Lubricating oil is indispensable for the maintenance of non-woven bag making machine. How to choose the lubricant of non-woven bag making machine? Lubricants only require internal lubrication, so their selection is very simple. However, in most cases, it is best to adjust their internal and external lubrication to a certain extent.
The internal and external lubrication function of a lubricant is determined by its chemical composition, polarity and solubility in polymer melt. For example, stearic acid monoglyceride can be dissolved in polyvinyl chloride melt and has partial internal lubrication function. Its internal lubrication function comes from the role of two polar hydroxyl groups in the molecule; Glyceryl tristearate has only external lubricating function because it has no hydroxyl group in its molecule. Of course, the lubrication function is also affected by the impurities and other additives contained in the lubricant.
There are many kinds of lubricants for plastics of non-woven fabric bag making machine, from natural substances such as lignite wax, paraffin, mineral oil, animal and vegetable oil to various low molecular weight polymers such as low molecular fluororesin, organosilicon oil, low density polyethylene, etc. some aliphatic compounds are commonly used, such as stearic acid, stearic acid soaps, and fatty acid esters. And amide compounds.
In 1981, the United States consumed more than 10000 tons of lubricants in plastic processing, including 45% of amides, 35% of stearic acid and its derivatives, and wax compounds. Some lubricants, such as oleic acid amide, stearic acid amide, fatty acid metal salt hard (fatty acid cadmium), etc., are also good anti sticking agents. As long as 0.5% lubricating oil is added to the non-woven bag making machine, the film can obtain good smoothness. Of course, fillers such as silica and clay are also the longest used anti sticking agents, with an amount of 0.1-1.0%. They are often called opening agents.
