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A study of the absorption of fruit juice volatiles by the sealant layer in flexible packaging containers (the effect of package on quality of fruit juice, part IV)
Author(s) -
Yamada Kazuki,
Mita Kouzou,
Yoshida Kiyoko,
Ishitani Takasuke
Publication year - 1992
Publication title -
packaging technology and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 50
eISSN - 1099-1522
pISSN - 0894-3214
DOI - 10.1002/pts.2770050109
Subject(s) - low density polyethylene , sealant , sorption , polyethylene terephthalate , citrus unshiu , polyethylene , materials science , chemistry , food science , composite material , chemical engineering , organic chemistry , adsorption , botany , engineering , biology
Various experimental packaging containers were tested for their tendency to absorb fruit juice volatiles in the innermost heat‐sealing layer. Analysis of head‐space gas by GLC and sensory evaluations were carried out in order to evaluate the effect of each type of sealant. Coextrusion sealants (thin low‐density polyethylene, LDPE), a sealant containing the orange essence powdered with cyclo‐dextrin (CD), and polyethylene‐terephthalate (PET) or polyacrylonitrile (PAN), synthetic resisns with high transition temperatures ( T g ) were prepared. Coextrusion or CD‐containing sealants as compared with LDPE, reduced the sorption of d‐Limonene from Mandarin orange [Citrum unshiu Marc.] juice by 15–20% but did not show effective results in sensory evaluations. On the other hand PET or PAN sealants showed no sorption at all. Similar results were obtained with 'citrus mix' model essence. However, LDPE also did not show volatile sorption in the case of 'soft fruit mix' model essence. It is difficult to prevent sorption of the volatiles of citrus fruit juices if the sealants are of the coextrusion type or CD‐containing LDPE type. Sorption can be controlled most effectively when the sealats are PET or PAN.