TABLE OF CONTENTS A range of PEN samples were investigated. Into each of these samples, 1% benzyl butyl phthalate (BBP) and 0.1% of a benzotriazole were compounded and injection moulded plaques suitable for testing were manufactured from the blends. Migration of the additives into olive oil food simulant has been measured using test condition of 10 days at 40 C and 2 hours at 121 C. The results are listed in Table 14.4 together with the measured C p,0. This polymer is relatively new to the market place and insufficient migration data are available to generate a realistic A p value. Consequently, predictions are not possible for this polymer. The initial concentration of additive in the polymer C p,0 and the predicted migration value Cf for these polymers are given Table 14.4 and can be used to derive a suitable A p .
| Polymer 1 | Polymer 2 | Polymer 3 | Polymer 4 | Polymer 5 | Polymer 6 | |
|---|---|---|---|---|---|---|
| BBP C f (mg/kg) | ||||||
| 10 d at 40 C | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| 2 h at 121 C | 0.2 | 0.2 | 5.3 | 0.2 | 0.1 | 0.2 |
| C P,0, (mg/kg) | 8700 | 8700 | 7100 | 8600 | 8600 | 8200 |
| ( Reproduced with permission from O Brien and co-workers, Food Additives and Contaminants , 2002, 19 |
