Effect of resin types and antioxidants on release of off-flavor from HDPE bottles

K. L. Yam, Y. C. Ho, S. S. Young, P. F. Zambetti

Research output: Contribution to journalArticle

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Abstract

The effects of three types of high-density polyethylene (HDPE) resins (A, B, and C) and three antioxidants (vitamin E, Irganox 1010, and BHT) on the release of off-flavor (including off-odor and off-taste) from blow-molded HDPE bottles were investigated using sensory analysis and gas Chromatography/mass spectrometry (GC/MS) analysis. Overall the sensory study showed that off-flavor intensity was affected by both resin type and antioxidant. Resin A bottles yielded less off-flavor compared to resin B or C bottles. Vitamin E containing bottles yielded less off-flavor compared to Irganox 1010 or BHT containing bottles for resins A and B; however, the antioxidants have almost the same effect on resin C, The GC/MS study identified more than 60 volatile compounds released from the bottles, ranging from C5 to C20, which belonged to the groups of n-alkane, 1-alkene, aldehyde, ketone, phenolic, olefin, and paraffin - among them aldehydes and ketones were the most important due to their very low odor thresholds. Resin A bottles yielded less aldehyde and ketone compared to resin B or C bottles. Vitamin E containing bottles yielded less aldehydes and ketones compared to bottles containing Irganox 1010 or BHT. There was a general consistency between the sensory and GC/MS data. The aldehyde and ketone concentration was linearly correlated reasonably well to odor (R2 = 0.78) and taste scores (R2 = 0.67). Another study was also conducted, which shows vitamin E has smaller reduction in melt flow index due to blow molding compared to Irganox 1010 or BHT.

Original languageEnglish (US)
Pages (from-to)727-755
Number of pages29
JournalPolymer - Plastics Technology and Engineering
Volume35
Issue number5
DOIs
Publication statusPublished - Jan 1 1996

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All Science Journal Classification (ASJC) codes

  • Materials Science (miscellaneous)
  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry

Keywords

  • Antioxidant
  • HDPE resin
  • Off-flavor

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