| 摘要 |
PET foam is processed into flakes. The flakes are densified in a pellet mill at between about 300 DEG F. and about 350 DEG F. to produce pellets. The pellets are then dried in a desiccant dryer at about 350 DEG F. for about 6 hours, so that the dew point of the pellets reaches about -40 DEG F. The dried pellets have an intrinsic viscosity about equal to virgin PET and a crystallinity greater than 20%. This material can be reused as if it were virgin PET.
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