Migration study of caprolactam from polyamide 6 sheets into food simulants

Hyun Ju Song, Yoonjee Chang, Ji Sou Lyu, Mi Yong Yon, Haeng shin Lee, Se Jong Park, Jae Chun Choi, Mee Kyung Kim, Jaejoon Han

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Caprolactam, used in manufacturing polyamide (PA) 6, may threaten human health. Here, PA 6 sheets were produced by using a twin-screw extruder to evaluate its safety. Caprolactam migration concentrations from the PA 6 sheets into food simulants were evaluated according to the standard migration test conditions under the Korean Food Standards Codex (KFSC). Concentrations were investigated under various food simulants (distilled water, 4% acetic acid, 20 and 50% ethanol, and heptane) and storage conditions (at 25, 60, and 95 °C). Caprolactam migration concentrations into food simulants were determined as follows: 4% acetic acid (0.982 mg/L), distilled water (0.851 mg/L), 50% ethanol (0.624 mg/L), 20% ethanol (0.328 mg/L), and n-heptane (not detected). Migrations were determined to be under the regulatory concentration (15 mg/L) according to the KFSC test conditions. Taken together, these results verified that the standard migration test conditions by KFSC were reliable to evaluate the safety of PA 6.

Original languageEnglish
Pages (from-to)1685-1689
Number of pages5
JournalFood Science and Biotechnology
Issue number6
Publication statusPublished - 2018 Dec 1

Bibliographical note

Funding Information:
Acknowledgements This research was supported by a Grant 15162MFDS043 from Ministry of Food and Drug Safety in 2015–2017 and also supported by a Basic Science Research Program of National Research Foundation (NRF) of Korea, funded by the Ministry of Education (NRF-2017R1D1A1B03029743).

Publisher Copyright:
© 2018, The Korean Society of Food Science and Technology and Springer Science+Business Media B.V., part of Springer Nature.


  • Caprolactam
  • Food contact material
  • Korean Food Standards Codex regulation
  • Migration
  • Polyamide 6

ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Applied Microbiology and Biotechnology


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