Process of producing PCR pellets

摘要

A process for producing, from PCR polyolefin feedstock, pellets which are suitable for molding into useful articles suitable for food contact and other applications wherein feedstock fragrances are not desirable.

主权项

1. A process for producing fragrance-free pellets having a limonene content of less than about 320 parts per billion from post-consumer recyclable (PCR) polyolefin plastic comprising the steps, performed in the following sequence, of
(i) extruding odiferous PCR polyolefin chips to form odiferous pellets; (ii) contacting the odiferous pellets with hot air at a temperature of about 50° C. to about 125° C. for about 3 to about 10 hours in a vessel to form fragrance-free pellets; (iii) flowing the fragrance-free pellets vertically downward to a common outlet; and (iv) discharging the fragrance-free pellets in discrete slugs from the vessel in sequential controlled quantities.