Hydraulic seals with plastic lubricant

Ingredients added to plastics in order to reduce friction plastic molding processing, improve the processing performance additives, known lubricants. External lubricant and plastic lubricants are lubricants of the points.
First, external lubricants and lubricants
1 external lubricant
External lubricant for reducing plastics processing equipment and processing materials or products, metal security seals and the friction between the metal sheet or adhesion. Such as reducing the melt and the injection molding machine, extruder screw barrel, or with friction between the product and the friction between the mold and so on.
External lubricant requirements are:
1) Table and tension, the polymer can reduce the friction between the metal surface.
2) the compatibility with the polymer is small, in the plastic processing process is easy to migrate to the surface of the material.
3) containing a metal affinity polar groups in the polymer sheet can be formed toward the metal lubricant layer oriented in polarity.
In addition to the external lubricant ingredients may be added to the plastic, but also can be rubbed on the metal mold and, in this case referred to as the release agent or anti-adhesive, indicative seal plastic additives generally does not include the column.
2 lubricants
Lubricants for reducing the melt processing of plastics friction between the resin molecules, lower melt viscosity, to increase the flow of molten material, is conducive to plastic processing.
Internal lubricant requirements are: the resin molecules should have proper compatibility, the compatibility of the small room, with increases in temperature, increasing the compatibility, the melting temperature of the polymer, with a better compatibility.
Lubricants and plasticizers difference: While the lubricant inside the plastic may promote fluid flow, but does not affect the material's physical and mechanical properties of the solid state, because a very small amount of lubricant, generally only a few thousandths of ingredients , far less than the amount of plasticizer. Lubricants can be added to plastics ingredients.
Most lubricants both internal and external lubricant dual function.