1) soap grease.
Soap grease grease production accounts for about 90%. The most widely used. The most commonly used are calcium-based, sodium, calcium sodium lithium compound such as calcium-based grease. Composite aluminum, lithium complex grease is also a certain proportion, the two lipid species is promising.
(1) calcium-based grease. From natural or synthetic fatty acids react with calcium hydroxide, calcium soap thickener made of medium-viscosity lubricating oil.
Dropping point between 75 ~ 100 ℃, the temperature should not exceed 60 ℃, if more than this temperature, glue stick the grease will become soft and even structural damage can not guarantee lubrication.
Has good water resistance, water emulsion deterioration is not easy, suitable for humid environments or in contact with water lubrication of all mechanical components.
With a shorter fiber structure, good stability and thixotropic shear stability, so it has good lubrication properties and protective properties.
(2) sodium grease,glue gun fats from natural or synthetic thickener sodium soap made from medium-viscosity lubricating oil.
With long fiber structure and good drawing, use a larger vibration, high temperature rolling or sliding bearings. Especially for low-speed, high load machinery lubrication. Because of their high drop point, 80% or higher in this temperature over an extended period of work.
Sodium base grease can absorb water vapor, delayed the penetration of water vapor to the metal surface. So it has some protective.
(3) calcium and sodium based grease. And sodium with calcium-based grease characteristics.
A calcium-based water-resistant resin, but also the heat resistance of sodium grease, dropped about 120 ℃, temperature range 90 ~ 100 ℃.
It has good mechanical pumping of security and can be used under wet conditions is not rolling on.
Is the most common application of grease and bearing grease calendar can be used for lubricating medium load of the motor, blower, chassis, wheel bearings and other parts.
(4) lithium grease. From natural fatty acids (stearic acid or 12 - hydroxy stearic acid) lithium soap thickener made from petroleum oil or synthetic lubricants. Synthesis of fatty acids from the oil lithium soap thickener made from oil, known as synthetic lithium grease.
For lithium grease with a variety of excellent performance, is widely used in aircraft, automobiles, machine tools and various machinery and equipment bearing lubrication. Dropping point higher than 180 ℃, long-term about 120 ℃ environment. It has good mechanical stability, chemical stability and low temperature, can be used in high speed mechanical bearings. With excellent water resistance, can be used in contact with water, damp and mechanical parts. Ability of lithium soap thickened, add in the extreme pressure grease, rust and other additives, made more efficient long-life grease, with a wide range of uses.
(5) composite calcium based grease. With low molecular weight fatty acid calcium salt, calcium soap, and made of composite calcium soap thickened low viscosity oil or synthetic lubricants made from petroleum. Temperature is good, grease dropping point higher than 180 ℃, 150 ℃ temperature can be about.
Has good water resistance, mechanical stability and colloidal stability. Has good extreme pressure for higher temperatures and higher mechanical load bearing lubrication. Complex calcium grease hardening the surface of water is easy, affecting its performance.
(6) composite aluminum grease.