The present invention relates to a polyethylene resin comprising A) a
first ethylene homo- or copolymer fraction, and B) a second ethylene
homo- or copolymer fraction, wherein fraction (A) has a lower molecular
weight than fraction (B), characterized in that the polymer resin powder
obtained directly after the final polymerisation step has a particle size
distribution PSD.sub.95/5 equal to or smaller than 12. Furthermore, the
invention relates to a process for the production of a polymer
composition comprising: (i) a step in which ethylene monomers, and
optionally further alpha-olefin-comonomers, are polymerised in liquid
phase in the presence of a polymerisation catalyst, (ii) a step in which
ethylene monomers, and optionally further alpha-olefin comonomers, are
polymerised in the gas phase in the presence of a polymerisation
catalyst, and (iii) obtaining a polymer resin powder after the final
polymerisation step wherein the powder has a particle size distribution
PSD.sub.95/5 equal to or smaller than 12.