Migration behavior of antioxidants in polypropylene used for food packaging

doi:10.19491/j.issn.1001-9278.2025.05.013

Abstract

Abstract:

A series of polypropylene （PP） films containing antioxidant 1010 and antioxidant 627A were separately prepared. The antioxidant content of the films was determined by microwave extraction and liquid chromatography. Eight different food simulants were employed to simulate water⁃based foods （pH>4.5）， acidic foods （pH≤4.5）， alcoholic foods， and fatty foods. The migration of antioxidants to food simulants was investigated at three different temperatures and five different times. The results indicated that the migration levels of the two antioxidants to water， 3 wt% acetic acid， and 10 vt% ethanol as three simulated substances were below the detection limit. When the simulated substance was n⁃hexane， both antioxidants could reach the maximum migration amount quickly. Antioxidant 1010 has a strong interaction with PP molecules to bind well with the matrix. Its overall migration was relatively small did not migrate even in alcoholic foods below 40 ℃. Moreover， its migration in the high⁃concentration alcoholic and fatty foods was significantly lower than that of antioxidant 627A.

Key words: food packaging, polypropylene, antioxidant 1010, antioxidant 627A, migration

CLC Number:

TQ320.6

HU Fa. Migration behavior of antioxidants in polypropylene used for food packaging[J]. China Plastics, 2025, 39(5): 83-87.

Figures/Tables 7

Fig.1. Relationship between antioxidant content in the film and microwave extraction time

抗氧剂类型	加标量/%	测得量/%	回收率/%	RSD/%
抗氧剂1010	0.3	0.290 2	96.7	1.5
	1.0	0.982 2	98.2	1.2
	3.0	2.943 4	98.1	0.7
抗氧剂627A	0.3	0.292 5	97.5	1.7
	1.0	0.978 4	97.8	0.9
	3.0	2.914 7	97.2	0.8

Tab.1. Recovery and repeatability of the antioxidant（n=6）

Fig.2. Concentration distribution and migration of the antioxidant in PP

Fig.3. Migration of the antioxidant 1010 to 70%、85%、100% ethanol

Fig.4. Migration of the antioxidant 1010 to n⁃hexane

Fig.5. Migration of antioxidant 627A to 70 %、85 %、100 % ethanol

Fig.6. Migration of antioxidant 627A to n⁃hexane

References 8

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