Self-lubricating properties, additives

Powdered cellulose has been used as a direct compression diluent. Though it forms hard tablets, fluidity is poor and dilution potential is low. Like microcrystalline cellulose it has some self-lubricating properties, but addition of a lubricant is usually necessary, causing a marked reduction in tablet strength. ... 

Because of the free graphite it contains, cast iron has certain self-lubricating properties but requires additional lubrication as there is a tendency for the material to pick up and quickly seize. 

Fig. 8.21 Electroless tiickel-PTFE deposition, (a) The deposit contains up to 23% by volume of PTFE as dispersed particles. The deposit has a typical composition of Nj 87%-P 7%-PTFE 6%wt. (b) Engineering applications utilize the low-friction corrosion resistance and self-lubricating properties. In addition to the threaded and grooved components shown, examples include bait and butterfly valves, pistons and moulds for plastics or rubbers. (Courtesy Ionic Surface Treatmenti. lonlube coatings by Dudley Division.)...

Primary Material Parameters. Materials selection for adhesion resistance requires carefiil consideration of the operating environment of the workpiece in addition to the total functional performance required of the workpiece itself. Wear properties of the steels vary widely with processing and heat treatment. Polymers are selected for sliding contact applications because of inherent properties such as inertness to many chemicals, relatively low galling tendency, and self-lubricating properties. Ceramics... 

For hundreds of years sticky surfaces have been dusted with powder (e.g., talc) to keep them separated. Talc is broadly used in cable and profile extrusion to obtain a smooth surface. Similarly, in injection molding, the application of aluminum trihydroxide gives a better surface finish. Talc, CaCOs, and diatomite provide anti-blocking properties. Graphite and other fillers decrease the coefficient of friction of materials. PTFE, graphite and M0S2 allow the production of self-lubricating parts. Here, PTFE, a polymer in powder form, acts as a filler in other polymers. Matte surfaced paint is obtained by the addition of silica fillers. 

CAS 1317-33-5 EINECS/ELINCS 215-263-9 Uses Dry lubricant on surfaces lubricant in rubber extrusions filler in self-lubricating plastics and powd. metal parts additive in metalworking compds. can act as coating if mixed with binder Properties Blue-gray slippery powd. 0.4-0.45 p particle size m.w. 160.06 ... 

The major industrial applications of hexagonal boron nitride rely on its high thermal conductivity, excellent dielectric properties, self-lubrication, chemical inertness, nontoxicity, and ease of machining. These are, for instance, mold wash for releasing molds, high-temperature lubricants, insulating filler material in composite materials, as an additive in silicone oils and synthetic resins, as filler for tubular heaters, and in neutron absorbers. On the other hand, the industrial applications of cubic boron nitride rely on its high hardness and are mainly as abrasives. 

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