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Abstract

An installation for crystallizing and drying granular polymer material with a low level of crystallinity includes:

a crystallization hopper, in which the granular polymer material is maintained in an agitated state and is processed with a first gas flow which is heated to a first temperature;a heating hopper which is arranged downstream of the crystallization hopper and in which the crystallized granular polymer material is heated to a second temperature which is greater than the first temperature,a drying hopper which is arranged downstream of the heating hopper and in which a predefined level of pressure reduction is maintained to dry the granular polymer material, anda supply hopper which is arranged downstream of the drying hopper and which is provided to supply a transformation machine with the granular polymer material.

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First Claim