A subject of the ethylene polymers of low density, improved

摘要

P process for the preparation of polymers of high pressure of ethylene by polymerization of ethylene in a system is under 500 to 5000 bars, the transfer of the mixture formed in a separator b, in a separator low pressure by means of a set of regulation c and in an extruder by means of a second regulating assembly e, the level of molten polymer b and d being adjusted to a normal value by the cross section of the opening of the set c or e. / p & & p & it is periodically modify the level of molten polymer by varying the section of the opening of the set c, or of the assembly of, or the speed of rotation of the extruder screw f, the level being lowered from the normal level, and then raised to this level, or the reverse. / p