Some important flame

 Flame retardant; can increase the flame resistance of the material called material flame retardant. Most of them are of the Periodic Table V, VII and compound III element burning rate: the sample unit of time means the length of the combustion. Synergistic effect: refers to two or more of the additives used in conjunction with, the total effect is greater than when used alone, the sum of the individual effects. Synergy system: the Metal stearate  complex flame retardant with the interaction between the use and thus to improve flame retardant performance system called synergistic effect. Synergy systems commonly antimony - halogen system, phosphorus halide system, phosphorus - nitrogen system. Burning speed: samples per unit time  glyceryl monostearate is the length of the combustion. Burning velocity combustion method with horizontal and vertical burning method to measure, too. Oxygen index: is the sample continued to burn like a candle shape when in a nitrogen - oxygen mixture stream in the oxygen content to a minimum. External friction: polymer materials in the molding process, the polymer melt and the friction between the surface processing equipment. Internal friction: forming polymer materials, the molten polymer intermolecular friction. Lubricants; polymer to reduce internal friction and external friction, improved flow of plastic melt, prevent processing of polymeric materials sticking to the equipment, to ensure surface smoothness of the added substance called lubricant. Lubricants: before the ingredients in the plastic processing, the added polymer has a compatibility with a lubricant, and uniformly dispersed into the material, the resin can reduce the friction between the molecules sky lubrication. External lubrication in  tio2 rutile two ways: one is the time of molding of the polymer material, the lubricant coated on the surface of processing equipment, so that in the melt processing temperature and the metal surface to form a "thin layer" will plastic melt and processing equipment to isolate, without adhering to the device, easy stripping or separating roller; Another is the compatibility with the polymer is very small, in the process it is easy to migrate from the polymer inside On the surface, thereby forming an isolation layer of the material, in the processing of the ingredients are added to and dispersed in the plastic, and in the process of migration to the surface, the grease. Release agent: for processing mold and material to be processed completely remain chemically inert substance known as release agent. Foaming; blowing agent can be in a class within a certain viscosity liquid rubber or plastic state, porous structure of the material formed of plastic