Patent ID: 8728368
Filing Date: 2014-05-20
Classification: B29B,B29K,C08G,C08J

Abstract:
1. A method for the preparing a semicrystalline polymer, comprising steps of: a) preparing a polymer melt from a crystallizable polymer; b) forming and solidifying particles of the polymer melt, wherein formation of the particles may be effected before or after solidification; c) cooling the particles; d) treating the particles for reducing their tendency to agglomerate; e) crystallizing the particles; wherein the treating step is effected between the cooling of the particles and the crystallizing the particles by shaking for one minute to thirty minutes at a temperature T1 which is below the glass transition temperature Tg of the polymer plus 10° C., i.e. T1<Tg+10° C., wherein a multiplicity of impacts is transmitted to the particles by the shaking, wherein the average number of impacts on the particles is more than 150 and a specific kinetic energy input per impact of more than 0.1 J/kg is effected, and wherein the crystallizing is effected in a thermal manner under supply of heat.