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, Meekyung Kim, Jaejoon Han

Research output: Contribution to journalArticle


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)1-5
Number of pages5
JournalFood Science and Biotechnology
Publication statusAccepted/In press - 2018 May 29



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

ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Applied Microbiology and Biotechnology

Cite this

Song, H. J., Chang, Y., Lyu, J. S., Yon, M. Y., Lee, H. S., Park, S. J., Choi, J. C., Kim, M., & Han, J. (Accepted/In press). Migration study of caprolactam from polyamide 6 sheets into food simulants. Food Science and Biotechnology, 1-5. https://doi.org/10.1007/s10068-018-0403-4