Figure 8. Influence of packaging materials upon change in moisture content of
control (1-4) and new samples of “Zolota Bdzhilka” (5-8) dry breakfasts
Source: developed by the author
In PE packages, the intensive moisturizing of the control sample was detected
after 2 months' storage. During the research period, this indicator increased in 1.8
times.
In cast PP bags, the moisture content was lower by 5%, in PET packages – by
10% and in BOPP packages – by 23%. Within 10 months' storage, moisture content of
the control sample in PE packaging increased in 3.8 times in comparison with fresh
products, whereas for BOPP packages this value grew in 3.4 times. For the whole
period of studies (12 months), the moisture content of the control sample in packages
under comparison increased in 4.3 and 3.7 times, respectively. Consequently, the
storage of the control sample for 6-8 month' in experimental polymer bags has led to
evident moisture sorption, but within the limits provided by the standard.
"Zolota bdzhilka" puffed cereals of grazed drops type are characterized by lower
sorption properties, which was noticeable in all types of packaging: within 4 months'
storage – from 1,7 times (cast PP) to 1,3 times (BOPP); for 6 months' storage – from
2.1 times (PE bags) to 1.7 times (BOPP). Within 8-10 months' storage, the moisture
content of "Zolota bdzhilka" samples in PE packages increased in 2.5-3.1 times, and in
BOPP packages – in 2.2-2.6 times. At the end of storage (12 months), increased
moisture content (that was higher than permissible) was detected in PE packages and
comprised 0.48%, while in BOPP bags this number was by 0.71% lower.
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